/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.core.dom;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.text.IDocument;
import org.eclipse.text.edits.TextEdit;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.core.JavaScriptCore;
import org.eclipse.wst.jsdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.wst.jsdt.internal.compiler.parser.Scanner;
/**
* Umbrella owner and abstract syntax tree node factory.
* An <code>AST</code> instance serves as the common owner of any number of
* AST nodes, and as the factory for creating new AST nodes owned by that
* instance.
* <p>
* Abstract syntax trees may be hand constructed by clients, using the
* <code>new<i>TYPE</i></code> factory methods to create new nodes, and the
* various <code>set<i>CHILD</i></code> methods
* (see {@link org.eclipse.wst.jsdt.core.dom.ASTNode ASTNode} and its subclasses)
* to connect them together.
* </p>
* <p>
* Each AST node belongs to a unique AST instance, called the owning AST.
* The children of an AST node always have the same owner as their parent node.
* If a node from one AST is to be added to a different AST, the subtree must
* be cloned first to ensures that the added nodes have the correct owning AST.
* </p>
* <p>
* There can be any number of AST nodes owned by a single AST instance that are
* unparented. Each of these nodes is the root of a separate little tree of nodes.
* The method <code>ASTNode.getRoot()</code> navigates from any node to the root
* of the tree that it is contained in. Ordinarily, an AST instance has one main
* tree (rooted at a <code>JavaScriptUnit</code>), with newly-created nodes appearing
* as additional roots until they are parented somewhere under the main tree.
* One can navigate from any node to its AST instance, but not conversely.
* </p>
* <p>
* The class {@link ASTParser} parses a string
* containing a JavaScript source code and returns an abstract syntax tree
* for it. The resulting nodes carry source ranges relating the node back to
* the original source characters.
* </p>
* <p>
* JavaScript units created by <code>ASTParser</code> from a
* source document can be serialized after arbitrary modifications
* with minimal loss of original formatting. Here is an example:
* <pre>
* Document doc = new Document("var abc;\nfunction X() {}\n");
* ASTParser parser = ASTParser.newParser(AST.JLS3);
* parser.setSource(doc.get().toCharArray());
* JavaScriptUnit cu = (JavaScriptUnit) parser.createAST(null);
* cu.recordModifications();
* AST ast = cu.getAST();
* FunctionDeclaration id = ast.newFunctionDeclaration();
* id.setName(ast.newName("X2");
* cu.statements().add(id); // add declaration at end
* TextEdit edits = cu.rewrite(document, null);
* UndoEdit undo = edits.apply(document);
* </pre>
* See also {@link org.eclipse.wst.jsdt.core.dom.rewrite.ASTRewrite} for
* an alternative way to describe and serialize changes to a
* read-only AST.
* </p>
* <p>
* Clients may create instances of this class using {@link #newAST(int)},
* but this class is not intended to be subclassed.
* </p>
*
* @see ASTParser
* @see ASTNode
*
* Provisional API: This class/interface is part of an interim API that is still under development and expected to
* change significantly before reaching stability. It is being made available at this early stage to solicit feedback
* from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
* (repeatedly) as the API evolves.
*/
public final class AST {
/**
* Constant for indicating the AST API that handles standard Javascript.
* This API is capable of handling all constructs
* in the JavaScript language as described in the ECMA-262
* Specification.
*
* @deprecated Clients should use the {@link #JLS3} AST API instead.
*/
public static final int JLS2 = 2;
/**
* Internal synonym for {@link #JLS2}. Use to alleviate
* deprecation warnings.
*/
/*package*/ static final int JLS2_INTERNAL = JLS2;
/**
* Constant for indicating the AST API that handles ECMAScript 4.
* This API is capable of handling all constructs in the
* JavaScript language as described in the ECMAScript 4
* Specification.
* ECMAScript 4 is a superset of all earlier versions of the
* JavaScript language.
*
*/
public static final int JLS3 = 3;
/**
* The binding resolver for this AST. Initially a binding resolver that
* does not resolve names at all.
*/
private BindingResolver resolver = new BindingResolver();
/**
* The event handler for this AST.
* Initially an event handler that does not nothing.
*/
private NodeEventHandler eventHandler = new NodeEventHandler();
/**
* Level of AST API supported by this AST.
*/
int apiLevel;
/**
* Internal modification count; initially 0; increases monotonically
* <b>by one or more</b> as the AST is successively modified.
*/
private long modificationCount = 0;
/**
* Internal original modification count; value is equals to <code>
* modificationCount</code> at the end of the parse (<code>ASTParser
* </code>). If this ast is not created with a parser then value is 0.
*/
private long originalModificationCount = 0;
/**
* When disableEvents > 0, events are not reported and
* the modification count stays fixed.
* <p>
* This mechanism is used in lazy initialization of a node
* to prevent events from being reported for the modification
* of the node as well as for the creation of the missing child.
* </p>
*/
private int disableEvents = 0;
/**
* Internal object unique to the AST instance. Readers must synchronize on
* this object when the modifying instance fields.
*/
private final Object internalASTLock = new Object();
/**
* JavaScript Scanner used to validate preconditions for the creation of specific nodes
* like CharacterLiteral, NumberLiteral, StringLiteral or SimpleName.
*/
Scanner scanner;
/**
* Internal ast rewriter used to record ast modification when record mode is enabled.
*/
InternalASTRewrite rewriter;
/**
* Default value of <code>flag<code> when a new node is created.
*/
private int defaultNodeFlag = 0;
/**
* Creates a new JavaScript abstract syntax tree
* (AST) following the specified set of API rules.
*
* @param level the API level; one of the LEVEL constants
*/
private AST(int level) {
if ((level != AST.JLS2)
&& (level != AST.JLS3)) {
throw new IllegalArgumentException();
}
this.apiLevel = level;
// initialize a scanner
this.scanner = new Scanner(
true /*comment*/,
true /*whitespace*/,
false /*nls*/,
ClassFileConstants.JDK1_3 /*sourceLevel*/,
ClassFileConstants.JDK1_5 /*complianceLevel*/,
null/*taskTag*/,
null/*taskPriorities*/,
true/*taskCaseSensitive*/);
}
/**
* Creates a new, empty abstract syntax tree using default options.
*
* @see JavaScriptCore#getDefaultOptions()
* @deprecated Clients should port their code to use the new JLS3 AST API and call
* {@link #newAST(int) AST.newAST(AST.JLS3)} instead of using this constructor.
*/
public AST() {
this(JavaScriptCore.getDefaultOptions());
}
/**
* Internal method.
* <p>
* This method converts the given internal compiler AST for the given source string
* into a javaScript unit. This method is not intended to be called by clients.
* </p>
*
* @param level the API level; one of the LEVEL constants
* @param compilationUnitDeclaration an internal AST node for a javaScript unit declaration
* @param source the string of the JavaScript javaScript unit
* @param options validator options
* @param workingCopy the working copy that the AST is created from
* @param monitor the progress monitor used to report progress and request cancelation,
* or <code>null</code> if none
* @param isResolved whether the given javaScript unit declaration is resolved
* @return the javaScript unit node
*/
public static JavaScriptUnit convertCompilationUnit(
int level,
org.eclipse.wst.jsdt.internal.compiler.ast.CompilationUnitDeclaration compilationUnitDeclaration,
char[] source,
Map options,
boolean isResolved,
org.eclipse.wst.jsdt.internal.core.CompilationUnit workingCopy,
int reconcileFlags,
IProgressMonitor monitor) {
ASTConverter converter = new ASTConverter(options, isResolved, monitor);
AST ast = AST.newAST(level);
int savedDefaultNodeFlag = ast.getDefaultNodeFlag();
ast.setDefaultNodeFlag(ASTNode.ORIGINAL);
BindingResolver resolver = null;
if (isResolved) {
resolver = new DefaultBindingResolver(compilationUnitDeclaration.scope, workingCopy.owner, new DefaultBindingResolver.BindingTables(), false);
ast.setFlag(AST.RESOLVED_BINDINGS);
} else {
resolver = new BindingResolver();
}
ast.setFlag(reconcileFlags);
ast.setBindingResolver(resolver);
converter.setAST(ast);
JavaScriptUnit unit = converter.convert(compilationUnitDeclaration, source);
unit.setLineEndTable(compilationUnitDeclaration.compilationResult.getLineSeparatorPositions());
unit.setTypeRoot(workingCopy);
ast.setDefaultNodeFlag(savedDefaultNodeFlag);
return unit;
}
/**
* Creates a new, empty abstract syntax tree using the given options.
*
* @param options the table of options (key type: <code>String</code>;
* value type: <code>String</code>)
* @see JavaScriptCore#getDefaultOptions()
* @deprecated Clients should port their code to use the new JLS3 AST API and call
* {@link #newAST(int) AST.newAST(AST.JLS3)} instead of using this constructor.
*/
public AST(Map options) {
this(JLS2);
Object sourceLevelOption = options.get(JavaScriptCore.COMPILER_SOURCE);
long sourceLevel = ClassFileConstants.JDK1_3;
if (JavaScriptCore.VERSION_1_4.equals(sourceLevelOption)) {
sourceLevel = ClassFileConstants.JDK1_4;
} else if (JavaScriptCore.VERSION_1_5.equals(sourceLevelOption)) {
sourceLevel = ClassFileConstants.JDK1_5;
}
Object complianceLevelOption = options.get(JavaScriptCore.COMPILER_COMPLIANCE);
long complianceLevel = ClassFileConstants.JDK1_3;
if (JavaScriptCore.VERSION_1_4.equals(complianceLevelOption)) {
complianceLevel = ClassFileConstants.JDK1_4;
} else if (JavaScriptCore.VERSION_1_5.equals(complianceLevelOption)) {
complianceLevel = ClassFileConstants.JDK1_5;
}
// override scanner if 1.4 or 1.5 asked for
this.scanner = new Scanner(
true /*comment*/,
true /*whitespace*/,
false /*nls*/,
sourceLevel /*sourceLevel*/,
complianceLevel /*complianceLevel*/,
null/*taskTag*/,
null/*taskPriorities*/,
true/*taskCaseSensitive*/);
}
/**
* Creates a new JavaScript abstract syntax tree
* (AST) following the specified set of API rules.
*
* @param level the API level; one of the LEVEL constants
* @return new AST instance following the specified set of API rules.
* @exception IllegalArgumentException if:
* <ul>
* <li>the API level is not one of the LEVEL constants</li>
* </ul>
*/
public static AST newAST(int level) {
if ((level != AST.JLS2)
&& (level != AST.JLS3)) {
throw new IllegalArgumentException();
}
return new AST(level);
}
/**
* Returns the modification count for this AST. The modification count
* is a non-negative value that increases (by 1 or perhaps by more) as
* this AST or its nodes are changed. The initial value is unspecified.
* <p>
* The following things count as modifying an AST:
* <ul>
* <li>creating a new node owned by this AST,</li>
* <li>adding a child to a node owned by this AST,</li>
* <li>removing a child from a node owned by this AST,</li>
* <li>setting a non-node attribute of a node owned by this AST.</li>
* </ul>
* </p>
* Operations which do not entail creating or modifying existing nodes
* do not increase the modification count.
* <p>
* N.B. This method may be called several times in the course
* of a single client operation. The only promise is that the modification
* count increases monotonically as the AST or its nodes change; there is
* no promise that a modifying operation increases the count by exactly 1.
* </p>
*
* @return the current value (non-negative) of the modification counter of
* this AST
*/
public long modificationCount() {
return this.modificationCount;
}
/**
* Return the API level supported by this AST.
*
* @return level the API level; one of the <code>JLS*</code>LEVEL
* declared on <code>AST</code>; assume this set is open-ended
*/
public int apiLevel() {
return this.apiLevel;
}
/**
* Indicates that this AST is about to be modified.
* <p>
* The following things count as modifying an AST:
* <ul>
* <li>creating a new node owned by this AST</li>
* <li>adding a child to a node owned by this AST</li>
* <li>removing a child from a node owned by this AST</li>
* <li>setting a non-node attribute of a node owned by this AST</li>.
* </ul>
* </p>
* <p>
* N.B. This method may be called several times in the course
* of a single client operation.
* </p>
*/
void modifying() {
// when this method is called during lazy init, events are disabled
// and the modification count will not be increased
if (this.disableEvents > 0) {
return;
}
// increase the modification count
this.modificationCount++;
}
/**
* Disable events.
* This method is thread-safe for AST readers.
*
* @see #reenableEvents()
*/
final void disableEvents() {
synchronized (this.internalASTLock) {
// guard against concurrent access by another reader
this.disableEvents++;
}
// while disableEvents > 0 no events will be reported, and mod count will stay fixed
}
/**
* Reenable events.
* This method is thread-safe for AST readers.
*
* @see #disableEvents()
*/
final void reenableEvents() {
synchronized (this.internalASTLock) {
// guard against concurrent access by another reader
this.disableEvents--;
}
}
/**
* Reports that the given node is about to lose a child.
*
* @param node the node about to be modified
* @param child the node about to be removed
* @param property the child or child list property descriptor
*/
void preRemoveChildEvent(ASTNode node, ASTNode child, StructuralPropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE DEL]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.preRemoveChildEvent(node, child, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has not been changed yet
} finally {
reenableEvents();
}
}
/**
* Reports that the given node just lost a child.
*
* @param node the node that was modified
* @param child the child node that was removed
* @param property the child or child list property descriptor
*/
void postRemoveChildEvent(ASTNode node, ASTNode child, StructuralPropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE DEL]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.postRemoveChildEvent(node, child, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has not been changed yet
} finally {
reenableEvents();
}
}
/**
* Reports that the given node is about have a child replaced.
*
* @param node the node about to be modified
* @param child the child node about to be removed
* @param newChild the replacement child
* @param property the child or child list property descriptor
*/
void preReplaceChildEvent(ASTNode node, ASTNode child, ASTNode newChild, StructuralPropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE REP]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.preReplaceChildEvent(node, child, newChild, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has not been changed yet
} finally {
reenableEvents();
}
}
/**
* Reports that the given node has just had a child replaced.
*
* @param node the node modified
* @param child the child removed
* @param newChild the replacement child
* @param property the child or child list property descriptor
*/
void postReplaceChildEvent(ASTNode node, ASTNode child, ASTNode newChild, StructuralPropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE REP]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.postReplaceChildEvent(node, child, newChild, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has not been changed yet
} finally {
reenableEvents();
}
}
/**
* Reports that the given node is about to gain a child.
*
* @param node the node that to be modified
* @param child the node that to be added as a child
* @param property the child or child list property descriptor
*/
void preAddChildEvent(ASTNode node, ASTNode child, StructuralPropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE ADD]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.preAddChildEvent(node, child, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has already been changed
} finally {
reenableEvents();
}
}
/**
* Reports that the given node has just gained a child.
*
* @param node the node that was modified
* @param child the node that was added as a child
* @param property the child or child list property descriptor
*/
void postAddChildEvent(ASTNode node, ASTNode child, StructuralPropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE ADD]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.postAddChildEvent(node, child, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has already been changed
} finally {
reenableEvents();
}
}
/**
* Reports that the given node is about to change the value of a
* non-child property.
*
* @param node the node to be modified
* @param property the property descriptor
*/
void preValueChangeEvent(ASTNode node, SimplePropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE CHANGE]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.preValueChangeEvent(node, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has already been changed
} finally {
reenableEvents();
}
}
/**
* Reports that the given node has just changed the value of a
* non-child property.
*
* @param node the node that was modified
* @param property the property descriptor
*/
void postValueChangeEvent(ASTNode node, SimplePropertyDescriptor property) {
// IMPORTANT: this method is called by readers during lazy init
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE CHANGE]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.postValueChangeEvent(node, property);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has already been changed
} finally {
reenableEvents();
}
}
/**
* Reports that the given node is about to be cloned.
*
* @param node the node to be cloned
*/
void preCloneNodeEvent(ASTNode node) {
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE CLONE]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.preCloneNodeEvent(node);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has already been changed
} finally {
reenableEvents();
}
}
/**
* Reports that the given node has just been cloned.
*
* @param node the node that was cloned
* @param clone the clone of <code>node</code>
*/
void postCloneNodeEvent(ASTNode node, ASTNode clone) {
synchronized (this.internalASTLock) {
// guard against concurrent access by a reader doing lazy init
if (this.disableEvents > 0) {
// doing lazy init OR already processing an event
// System.out.println("[BOUNCE CLONE]");
return;
} else {
disableEvents();
}
}
try {
this.eventHandler.postCloneNodeEvent(node, clone);
// N.B. even if event handler blows up, the AST is not
// corrupted since node has already been changed
} finally {
reenableEvents();
}
}
/**
* Returns the binding resolver for this AST.
*
* @return the binding resolver for this AST
*/
BindingResolver getBindingResolver() {
return this.resolver;
}
/**
* Returns the event handler for this AST.
*
* @return the event handler for this AST
*/
NodeEventHandler getEventHandler() {
return this.eventHandler;
}
/**
* Sets the event handler for this AST.
*
* @param eventHandler the event handler for this AST
*/
void setEventHandler(NodeEventHandler eventHandler) {
if (this.eventHandler == null) {
throw new IllegalArgumentException();
}
this.eventHandler = eventHandler;
}
/**
* Returns default node flags of new nodes of this AST.
*
* @return the default node flags of new nodes of this AST
*/
int getDefaultNodeFlag() {
return this.defaultNodeFlag;
}
/**
* Sets default node flags of new nodes of this AST.
*
* @param flag node flags of new nodes of this AST
*/
void setDefaultNodeFlag(int flag) {
this.defaultNodeFlag = flag;
}
/**
* Set <code>originalModificationCount</code> to the current modification count
*
*/
void setOriginalModificationCount(long count) {
this.originalModificationCount = count;
}
/**
* Returns the type binding for a "well known" type.
* <p>
* Note that bindings are generally unavailable unless requested when the
* AST is being built.
* </p>
*
* @param name the name of a well known type
* @return the corresponding type binding, or <code>null</code> if the
* named type is not considered well known or if no binding can be found
* for it
*/
public ITypeBinding resolveWellKnownType(String name) {
if (name == null) {
return null;
}
return getBindingResolver().resolveWellKnownType(name);
}
/**
* Sets the binding resolver for this AST.
*
* @param resolver the new binding resolver for this AST
*/
void setBindingResolver(BindingResolver resolver) {
if (resolver == null) {
throw new IllegalArgumentException();
}
this.resolver = resolver;
}
/**
* Checks that this AST operation is not used when
* building level JLS2 ASTs.
* @exception UnsupportedOperationException
*/
void unsupportedIn2() {
if (this.apiLevel == AST.JLS2) {
throw new UnsupportedOperationException("Operation not supported in JLS2 AST"); //$NON-NLS-1$
}
}
/**
* Checks that this AST operation is only used when
* building level JLS2 ASTs.
* @exception UnsupportedOperationException
*/
void supportedOnlyIn2() {
if (this.apiLevel != AST.JLS2) {
throw new UnsupportedOperationException("Operation not supported in JLS2 AST"); //$NON-NLS-1$
}
}
/**
* new Class[] {AST.class}
*/
private static final Class[] AST_CLASS = new Class[] {AST.class};
/**
* new Object[] {this}
*/
private final Object[] THIS_AST= new Object[] {this};
/*
* Must not collide with a value for IJavaScriptUnit constants
*/
static final int RESOLVED_BINDINGS = 0x80000000;
/**
* Tag bit value. This represents internal state of the tree.
*/
private int bits;
/**
* Creates an unparented node of the given node class
* (non-abstract subclass of {@link ASTNode}).
*
* @param nodeClass AST node class
* @return a new unparented node owned by this AST
* @exception IllegalArgumentException if <code>nodeClass</code> is
* <code>null</code> or is not a concrete node type class
*/
public ASTNode createInstance(Class nodeClass) {
if (nodeClass == null) {
throw new IllegalArgumentException();
}
try {
// invoke constructor with signature Foo(AST)
Constructor c = nodeClass.getDeclaredConstructor(AST_CLASS);
Object result = c.newInstance(this.THIS_AST);
return (ASTNode) result;
} catch (NoSuchMethodException e) {
// all AST node classes have a Foo(AST) constructor
// therefore nodeClass is not legit
throw new IllegalArgumentException();
} catch (InstantiationException e) {
// all concrete AST node classes can be instantiated
// therefore nodeClass is not legit
throw new IllegalArgumentException();
} catch (IllegalAccessException e) {
// all AST node classes have an accessible Foo(AST) constructor
// therefore nodeClass is not legit
throw new IllegalArgumentException();
} catch (InvocationTargetException e) {
// concrete AST node classes do not die in the constructor
// therefore nodeClass is not legit
throw new IllegalArgumentException();
}
}
/**
* Creates an unparented node of the given node type.
* This convenience method is equivalent to:
* <pre>
* createInstance(ASTNode.nodeClassForType(nodeType))
* </pre>
*
* @param nodeType AST node type, one of the node type
* constants declared on {@link ASTNode}
* @return a new unparented node owned by this AST
* @exception IllegalArgumentException if <code>nodeType</code> is
* not a legal AST node type
*/
public ASTNode createInstance(int nodeType) {
// nodeClassForType throws IllegalArgumentException if nodeType is bogus
Class nodeClass = ASTNode.nodeClassForType(nodeType);
return createInstance(nodeClass);
}
//=============================== NAMES ===========================
/**
* Creates and returns a new unparented simple name node for the given
* identifier. The identifier should be a legal JavaScript identifier, but not
* a keyword, boolean literal ("true", "false") or null literal ("null").
*
* @param identifier the identifier
* @return a new unparented simple name node
* @exception IllegalArgumentException if the identifier is invalid
*/
public SimpleName newSimpleName(String identifier) {
if (identifier == null) {
throw new IllegalArgumentException();
}
SimpleName result = new SimpleName(this);
result.setIdentifier(identifier);
return result;
}
/**
* Creates and returns a new unparented qualified name node for the given
* qualifier and simple name child node.
*
* @param qualifier the qualifier name node
* @param name the simple name being qualified
* @return a new unparented qualified name node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* </ul>
*/
public QualifiedName newQualifiedName(
Name qualifier,
SimpleName name) {
QualifiedName result = new QualifiedName(this);
result.setQualifier(qualifier);
result.setName(name);
return result;
}
/**
* Creates and returns a new unparented name node for the given name
* segments. Returns a simple name if there is only one name segment, and
* a qualified name if there are multiple name segments. Each of the name
* segments should be legal JavaScript identifiers (this constraint may or may
* not be enforced), and there must be at least one name segment.
*
* @param identifiers a list of 1 or more name segments, each of which
* is a legal JavaScript identifier
* @return a new unparented name node
* @exception IllegalArgumentException if:
* <ul>
* <li>the identifier is invalid</li>
* <li>the list of identifiers is empty</li>
* </ul>
*/
public Name newName(String[] identifiers) {
// update internalSetName(String[] if changed
int count = identifiers.length;
if (count == 0) {
throw new IllegalArgumentException();
}
Name result = newSimpleName(identifiers[0]);
for (int i = 1; i < count; i++) {
SimpleName name = newSimpleName(identifiers[i]);
result = newQualifiedName(result, name);
}
return result;
}
/* (omit jsdoc for this method)
* This method is a copy of setName(String[]) that doesn't do any validation.
*/
Name internalNewName(String[] identifiers) {
int count = identifiers.length;
if (count == 0) {
throw new IllegalArgumentException();
}
final SimpleName simpleName = new SimpleName(this);
simpleName.internalSetIdentifier(identifiers[0]);
Name result = simpleName;
for (int i = 1; i < count; i++) {
SimpleName name = new SimpleName(this);
name.internalSetIdentifier(identifiers[i]);
result = newQualifiedName(result, name);
}
return result;
}
/**
* Creates and returns a new unparented name node for the given name.
* The name string must consist of 1 or more name segments separated
* by single dots '.'. Returns a {@link QualifiedName} if the name has
* dots, and a {@link SimpleName} otherwise. Each of the name
* segments should be legal JavaScript identifiers (this constraint may or may
* not be enforced), and there must be at least one name segment.
* The string must not contains white space, '<', '>',
* '[', ']', or other any other characters that are not
* part of the JavaScript identifiers or separating '.'s.
*
* @param qualifiedName string consisting of 1 or more name segments,
* each of which is a legal JavaScript identifier, separated by single dots '.'
* @return a new unparented name node
* @exception IllegalArgumentException if:
* <ul>
* <li>the string is empty</li>
* <li>the string begins or ends in a '.'</li>
* <li>the string has adjacent '.'s</li>
* <li>the segments between the '.'s are not valid JavaScript identifiers</li>
* </ul>
*/
public Name newName(String qualifiedName) {
StringTokenizer t = new StringTokenizer(qualifiedName, ".", true); //$NON-NLS-1$
Name result = null;
// balance is # of name tokens - # of period tokens seen so far
// initially 0; finally 1; should never drop < 0 or > 1
int balance = 0;
while(t.hasMoreTokens()) {
String s = t.nextToken();
if (s.indexOf('.') >= 0) {
// this is a delimiter
if (s.length() > 1) {
// too many dots in a row
throw new IllegalArgumentException();
}
balance--;
if (balance < 0) {
throw new IllegalArgumentException();
}
} else {
// this is an identifier segment
balance++;
SimpleName name = newSimpleName(s);
if (result == null) {
result = name;
} else {
result = newQualifiedName(result, name);
}
}
}
if (balance != 1) {
throw new IllegalArgumentException();
}
return result;
}
//=============================== TYPES ===========================
/**
* Creates and returns a new unparented simple type node with the given
* type name.
* <p>
* This method can be used to convert a name (<code>Name</code>) into a
* type (<code>Type</code>) by wrapping it.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param typeName the name of the class or interface
* @return a new unparented simple type node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* </ul>
*/
public SimpleType newSimpleType(Name typeName) {
SimpleType result = new SimpleType(this);
result.setName(typeName);
return result;
}
/**
* Creates and returns a new unparented array type node with the given
* component type, which may be another array type.
*
* @param componentType the component type (possibly another array type)
* @return a new unparented array type node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public ArrayType newArrayType(Type componentType) {
ArrayType result = new ArrayType(this);
result.setComponentType(componentType);
return result;
}
/**
* Creates and returns a new unparented array type node with the given
* element type and number of dimensions.
* <p>
* Note that if the element type passed in is an array type, the
* element type of the result will not be the same as what was passed in.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param elementType the element type (never an array type)
* @param dimensions the number of dimensions, a positive number
* @return a new unparented array type node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* <li>the element type is null</li>
* <li>the element type is an array type</li>
* <li>the number of dimensions is lower than 1</li>
* <li>the number of dimensions is greater than 1000</li>
* </ul>
*/
public ArrayType newArrayType(Type elementType, int dimensions) {
if (elementType == null || elementType.isArrayType()) {
throw new IllegalArgumentException();
}
if (dimensions < 1 || dimensions > 1000) {
// we would blow our stacks anyway with a 1000-D array
throw new IllegalArgumentException();
}
ArrayType result = new ArrayType(this);
result.setComponentType(elementType);
for (int i = 2; i <= dimensions; i++) {
result = newArrayType(result);
}
return result;
}
/**
* Creates and returns a new unparented primitive type node with the given
* type code.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param typeCode one of the primitive type code constants declared in
* <code>PrimitiveType</code>
* @return a new unparented primitive type node
* @exception IllegalArgumentException if the primitive type code is invalid
*/
public PrimitiveType newPrimitiveType(PrimitiveType.Code typeCode) {
PrimitiveType result = new PrimitiveType(this);
result.setPrimitiveTypeCode(typeCode);
return result;
}
/**
* Creates and returns a new inferred type node with the given
* type name.
*
* @param typeName the name of the inferred type
* @return a new unparented inferred type node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* </ul>
*/
public InferredType newInferredType(String typeName) {
InferredType result = new InferredType(this);
result.setSourceRange(-1, 0);
if (typeName!=null)
result.type=typeName;
return result;
}
/**
* Creates and returns a new unparented qualified type node with
* the given qualifier type and name.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param qualifier the qualifier type node
* @param name the simple name being qualified
* @return a new unparented qualified type node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* </ul>
* @exception UnsupportedOperationException if this operation is used in
* a JLS2 AST
*/
public QualifiedType newQualifiedType(Type qualifier, SimpleName name) {
QualifiedType result = new QualifiedType(this);
result.setQualifier(qualifier);
result.setName(name);
return result;
}
//=============================== DECLARATIONS ===========================
/**
* Creates an unparented javaScript unit node owned by this AST.
* The javaScript unit initially has no package declaration, no
* import declarations, and no type declarations.
*
* @return the new unparented javaScript unit node
*/
public JavaScriptUnit newJavaScriptUnit() {
return new JavaScriptUnit(this);
}
/**
* Creates an unparented package declaration node owned by this AST.
* The package declaration initially declares a package with an
* unspecified name.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return the new unparented package declaration node
*/
public PackageDeclaration newPackageDeclaration() {
PackageDeclaration result = new PackageDeclaration(this);
return result;
}
/**
* Creates an unparented import declaration node owned by this AST.
* The import declaration initially contains a single-type import
* of a type with an unspecified name.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return the new unparented import declaration node
*/
public ImportDeclaration newImportDeclaration() {
ImportDeclaration result = new ImportDeclaration(this);
return result;
}
/**
* Creates an unparented class declaration node owned by this AST.
* The name of the class is an unspecified, but legal, name;
* no modifiers; no doc comment; no superclass or superinterfaces;
* and an empty class body.
* <p>
* To create an interface, use this method and then call
* <code>TypeDeclaration.setInterface(true)</code>.
* </p>
* <p>
* To create an enum declaration, use this method and then call
* <code>TypeDeclaration.setEnumeration(true)</code>.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return a new unparented type declaration node
*/
public TypeDeclaration newTypeDeclaration() {
TypeDeclaration result = new TypeDeclaration(this);
return result;
}
/**
* Creates an unparented method declaration node owned by this AST.
* By default, the declaration is for a method of an unspecified, but
* legal, name; no modifiers; no doc comment; no parameters; return
* type void; no extra array dimensions; no thrown exceptions; and no
* body (as opposed to an empty body).
* <p>
* To create a constructor, use this method and then call
* <code>FunctionDeclaration.setConstructor(true)</code> and
* <code>FunctionDeclaration.setName(className)</code>.
* </p>
*
* @return a new unparented method declaration node
*/
public FunctionDeclaration newFunctionDeclaration() {
FunctionDeclaration result = new FunctionDeclaration(this);
result.setConstructor(false);
return result;
}
/**
* Creates an unparented single variable declaration node owned by this AST.
* By default, the declaration is for a variable with an unspecified, but
* legal, name and type; no modifiers; no array dimensions after the
* variable; no initializer; not variable arity.
*
* @return a new unparented single variable declaration node
*/
public SingleVariableDeclaration newSingleVariableDeclaration() {
SingleVariableDeclaration result = new SingleVariableDeclaration(this);
return result;
}
/**
* Creates an unparented variable declaration fragment node owned by this
* AST. By default, the fragment is for a variable with an unspecified, but
* legal, name; no extra array dimensions; and no initializer.
*
* @return a new unparented variable declaration fragment node
*/
public VariableDeclarationFragment newVariableDeclarationFragment() {
VariableDeclarationFragment result = new VariableDeclarationFragment(this);
return result;
}
/*
* Creates an unparented initializer node owned by this AST, with an
* empty block. By default, the initializer has no modifiers and
* an empty block.
*
* @return a new unparented initializer node
*/
public Initializer newInitializer() {
Initializer result = new Initializer(this);
return result;
}
/**
* Creates and returns a new unparented modifier node for the given
* modifier.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param keyword one of the modifier keyword constants
* @return a new unparented modifier node
* @exception IllegalArgumentException if the primitive type code is invalid
* @exception UnsupportedOperationException if this operation is used in
* a JLS2 AST
*/
public Modifier newModifier(Modifier.ModifierKeyword keyword) {
Modifier result = new Modifier(this);
result.setKeyword(keyword);
return result;
}
/**
* Creates and returns a list of new unparented modifier nodes
* for the given modifier flags.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param flags bitwise or of modifier flags declared on {@link Modifier}
* @return a possibly empty list of new unparented modifier nodes
* (element type <code>Modifier</code>)
* @exception UnsupportedOperationException if this operation is used in
* a JLS2 AST
*/
public List newModifiers(int flags) {
if (this.apiLevel == AST.JLS2) {
unsupportedIn2();
}
List result = new ArrayList(3); // 3 modifiers is more than average
if (Modifier.isPublic(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.PUBLIC_KEYWORD));
}
if (Modifier.isProtected(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.PROTECTED_KEYWORD));
}
if (Modifier.isPrivate(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.PRIVATE_KEYWORD));
}
if (Modifier.isAbstract(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.ABSTRACT_KEYWORD));
}
if (Modifier.isStatic(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.STATIC_KEYWORD));
}
if (Modifier.isFinal(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.FINAL_KEYWORD));
}
if (Modifier.isSynchronized(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.SYNCHRONIZED_KEYWORD));
}
if (Modifier.isNative(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.NATIVE_KEYWORD));
}
if (Modifier.isStrictfp(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.STRICTFP_KEYWORD));
}
if (Modifier.isTransient(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.TRANSIENT_KEYWORD));
}
if (Modifier.isVolatile(flags)) {
result.add(newModifier(Modifier.ModifierKeyword.VOLATILE_KEYWORD));
}
return result;
}
//=============================== COMMENTS ===========================
/**
* Creates and returns a new block comment placeholder node.
* <p>
* Note that this node type is used to recording the source
* range where a comment was found in the source string.
* These comment nodes are normally found (only) in
* {@linkplain JavaScriptUnit#getCommentList()
* the comment table} for parsed javaScript units.
* </p>
*
* @return a new unparented block comment node
*/
public BlockComment newBlockComment() {
BlockComment result = new BlockComment(this);
return result;
}
/**
* Creates and returns a new line comment placeholder node.
* <p>
* Note that this node type is used to recording the source
* range where a comment was found in the source string.
* These comment nodes are normally found (only) in
* {@linkplain JavaScriptUnit#getCommentList()
* the comment table} for parsed javaScript units.
* </p>
*
* @return a new unparented line comment node
*/
public LineComment newLineComment() {
LineComment result = new LineComment(this);
return result;
}
public ListExpression newListExpression() {
ListExpression result = new ListExpression(this);
return result;
}
/**
* Creates and returns a new doc comment node.
* Initially the new node has an empty list of tag elements
* (and, for backwards compatability, an unspecified, but legal,
* doc comment string)
*
* @return a new unparented doc comment node
*/
public JSdoc newJSdoc() {
JSdoc result = new JSdoc(this);
return result;
}
/**
* Creates and returns a new tag element node.
* Initially the new node has no tag name and an empty list of fragments.
* <p>
* Note that this node type is used only inside doc comments
* ({@link JSdoc}).
* </p>
*
* @return a new unparented tag element node
*/
public TagElement newTagElement() {
TagElement result = new TagElement(this);
return result;
}
/**
* Creates and returns a new text element node.
* Initially the new node has an empty text string.
* <p>
* Note that this node type is used only inside doc comments
* ({@link JSdoc Javadoc}).
* </p>
*
* @return a new unparented text element node
*/
public TextElement newTextElement() {
TextElement result = new TextElement(this);
return result;
}
/**
* Creates and returns a new member reference node.
* Initially the new node has no qualifier name and
* an unspecified, but legal, member name.
* <p>
* Note that this node type is used only inside doc comments
* ({@link JSdoc}).
* </p>
*
* @return a new unparented member reference node
*/
public MemberRef newMemberRef() {
MemberRef result = new MemberRef(this);
return result;
}
/**
* Creates and returns a new method reference node.
* Initially the new node has no qualifier name,
* an unspecified, but legal, method name, and an
* empty parameter list.
* <p>
* Note that this node type is used only inside doc comments
* ({@link JSdoc Javadoc}).
* </p>
*
* @return a new unparented method reference node
*/
public FunctionRef newFunctionRef() {
FunctionRef result = new FunctionRef(this);
return result;
}
/**
* Creates and returns a new method reference node.
* Initially the new node has an unspecified, but legal,
* type, not variable arity, and no parameter name.
* <p>
* Note that this node type is used only inside doc comments
* ({@link JSdoc}).
* </p>
*
* @return a new unparented method reference parameter node
*/
public FunctionRefParameter newFunctionRefParameter() {
FunctionRefParameter result = new FunctionRefParameter(this);
return result;
}
//=============================== STATEMENTS ===========================
/**
* Creates a new unparented local variable declaration statement node
* owned by this AST, for the given variable declaration fragment.
* By default, there are no modifiers and the base type is unspecified
* (but legal).
* <p>
* This method can be used to convert a variable declaration fragment
* (<code>VariableDeclarationFragment</code>) into a statement
* (<code>Statement</code>) by wrapping it. Additional variable
* declaration fragments can be added afterwards.
* </p>
*
* @param fragment the variable declaration fragment
* @return a new unparented variable declaration statement node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* <li>the variable declaration fragment is null</li>
* </ul>
*/
public VariableDeclarationStatement
newVariableDeclarationStatement(VariableDeclarationFragment fragment) {
if (fragment == null) {
throw new IllegalArgumentException();
}
VariableDeclarationStatement result =
new VariableDeclarationStatement(this);
result.fragments().add(fragment);
return result;
}
/**
* Creates a new unparented local type declaration statement node
* owned by this AST, for the given type declaration.
* <p>
* This method can be used to convert a type declaration
* (<code>TypeDeclaration</code>) into a statement
* (<code>Statement</code>) by wrapping it.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param decl the type declaration
* @return a new unparented local type declaration statement node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public TypeDeclarationStatement
newTypeDeclarationStatement(TypeDeclaration decl) {
TypeDeclarationStatement result = new TypeDeclarationStatement(this);
result.setDeclaration(decl);
return result;
}
/**
* Creates a new unparented local type declaration statement node
* owned by this AST, for the given type declaration.
* <p>
* This method can be used to convert any kind of type declaration
* (<code>AbstractTypeDeclaration</code>) into a statement
* (<code>Statement</code>) by wrapping it.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param decl the type declaration
* @return a new unparented local type declaration statement node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public TypeDeclarationStatement
newTypeDeclarationStatement(AbstractTypeDeclaration decl) {
TypeDeclarationStatement result = new TypeDeclarationStatement(this);
if (this.apiLevel == AST.JLS2) {
result.internalSetTypeDeclaration((TypeDeclaration) decl);
}
if (this.apiLevel >= AST.JLS3) {
result.setDeclaration(decl);
}
return result;
}
/**
* Creates an unparented block node owned by this AST, for an empty list
* of statements.
*
* @return a new unparented, empty block node
*/
public Block newBlock() {
return new Block(this);
}
/**
* Creates an unparented continue statement node owned by this AST.
* The continue statement has no label.
*
* @return a new unparented continue statement node
*/
public ContinueStatement newContinueStatement() {
return new ContinueStatement(this);
}
/**
* Creates an unparented break statement node owned by this AST.
* The break statement has no label.
*
* @return a new unparented break statement node
*/
public BreakStatement newBreakStatement() {
return new BreakStatement(this);
}
/**
* Creates a new unparented expression statement node owned by this AST,
* for the given expression.
* <p>
* This method can be used to convert an expression
* (<code>Expression</code>) into a statement (<code>Type</code>)
* by wrapping it. Note, however, that the result is only legal for
* limited expression types, including method invocations, assignments,
* and increment/decrement operations.
* </p>
*
* @param expression the expression
* @return a new unparented statement node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public ExpressionStatement newExpressionStatement(Expression expression) {
ExpressionStatement result = new ExpressionStatement(this);
result.setExpression(expression);
return result;
}
/**
* Creates a new unparented if statement node owned by this AST.
* By default, the expression is unspecified (but legal),
* the then statement is an empty block, and there is no else statement.
*
* @return a new unparented if statement node
*/
public IfStatement newIfStatement() {
return new IfStatement(this);
}
/**
* Creates a new unparented while statement node owned by this AST.
* By default, the expression is unspecified (but legal), and
* the body statement is an empty block.
*
* @return a new unparented while statement node
*/
public WhileStatement newWhileStatement() {
return new WhileStatement(this);
}
/**
* Creates a new unparented with statement node owned by this AST.
* By default, the expression is unspecified (but legal), and
* the body statement is an empty block.
*
* @return a new unparented with statement node
*/
public WithStatement newWithStatement() {
return new WithStatement(this);
}
/**
* Creates a new unparented do statement node owned by this AST.
* By default, the expression is unspecified (but legal), and
* the body statement is an empty block.
*
* @return a new unparented do statement node
*/
public DoStatement newDoStatement() {
return new DoStatement(this);
}
/**
* Creates a new unparented try statement node owned by this AST.
* By default, the try statement has an empty block, no catch
* clauses, and no finally block.
*
* @return a new unparented try statement node
*/
public TryStatement newTryStatement() {
return new TryStatement(this);
}
/**
* Creates a new unparented catch clause node owned by this AST.
* By default, the catch clause declares an unspecified, but legal,
* exception declaration and has an empty block.
*
* @return a new unparented catch clause node
*/
public CatchClause newCatchClause() {
return new CatchClause(this);
}
/**
* Creates a new unparented return statement node owned by this AST.
* By default, the return statement has no expression.
*
* @return a new unparented return statement node
*/
public ReturnStatement newReturnStatement() {
return new ReturnStatement(this);
}
/**
* Creates a new unparented throw statement node owned by this AST.
* By default, the expression is unspecified, but legal.
*
* @return a new unparented throw statement node
*/
public ThrowStatement newThrowStatement() {
return new ThrowStatement(this);
}
/**
* Creates a new unparented empty statement node owned by this AST.
*
* @return a new unparented empty statement node
*/
public EmptyStatement newEmptyStatement() {
return new EmptyStatement(this);
}
/**
* Creates a new unparented labeled statement node owned by this AST.
* By default, the label and statement are both unspecified, but legal.
*
* @return a new unparented labeled statement node
*/
public LabeledStatement newLabeledStatement() {
return new LabeledStatement(this);
}
/**
* Creates a new unparented switch statement node owned by this AST.
* By default, the expression is unspecified, but legal, and there are
* no statements or switch cases.
*
* @return a new unparented labeled statement node
*/
public SwitchStatement newSwitchStatement() {
return new SwitchStatement(this);
}
/**
* Creates a new unparented switch case statement node owned by
* this AST. By default, the expression is unspecified, but legal.
*
* @return a new unparented switch case node
*/
public SwitchCase newSwitchCase() {
return new SwitchCase(this);
}
/**
* Creates a new unparented for statement node owned by this AST.
* By default, there are no initializers, no condition expression,
* no updaters, and the body is an empty block.
*
* @return a new unparented for statement node
*/
public ForStatement newForStatement() {
return new ForStatement(this);
}
/**
* Creates a new unparented for..in statement node owned by this AST.
* By default, there are no initializers, no condition expression,
* no updaters, and the body is an empty block.
*
* @return a new unparented for..in statement node
*/
public ForInStatement newForInStatement() {
return new ForInStatement(this);
}
/*
* Creates a new unparented enhanced for statement node owned by this AST.
* By default, the paramter and expression are unspecified
* but legal subtrees, and the body is an empty block.
*
* @return a new unparented throw statement node
* @exception UnsupportedOperationException if this operation is used in
* a JLS2 AST
*/
public EnhancedForStatement newEnhancedForStatement() {
return new EnhancedForStatement(this);
}
//=============================== EXPRESSIONS ===========================
/**
* Creates and returns a new unparented string literal node for
* the empty string literal.
*
* @return a new unparented string literal node
*/
public StringLiteral newStringLiteral() {
return new StringLiteral(this);
}
/**
* Creates and returns a new unparented character literal node.
* Initially the node has an unspecified character literal.
*
* @return a new unparented character literal node
*/
public CharacterLiteral newCharacterLiteral() {
return new CharacterLiteral(this);
}
/**
* Creates and returns a new Regular Expression literal node.
* Initially the node has an unspecified character literal.
*
* @return a new unparented regular expression literal node
*/ public RegularExpressionLiteral newRegularExpressionLiteral() {
return new RegularExpressionLiteral(this);
}
/**
* Creates and returns a new unparented number literal node.
*
* @param literal the token for the numeric literal as it would
* appear in JavaScript source code
* @return a new unparented number literal node
* @exception IllegalArgumentException if the literal is null
*/
public NumberLiteral newNumberLiteral(String literal) {
if (literal == null) {
throw new IllegalArgumentException();
}
NumberLiteral result = new NumberLiteral(this);
result.setToken(literal);
return result;
}
/**
* Creates and returns a new unparented number literal node.
* Initially the number literal token is <code>"0"</code>.
*
* @return a new unparented number literal node
*/
public NumberLiteral newNumberLiteral() {
NumberLiteral result = new NumberLiteral(this);
return result;
}
/**
* Creates and returns a new unparented null literal node.
*
* @return a new unparented null literal node
*/
public NullLiteral newNullLiteral() {
return new NullLiteral(this);
}
/**
* Creates and returns a new unparented 'undefined' literal node.
*
* @return a new unparented 'undefined' literal node
*/
public UndefinedLiteral newUndefinedLiteral() {
return new UndefinedLiteral(this);
}
/**
* Creates and returns a new unparented boolean literal node.
* <p>
* For example, the assignment expression <code>foo = true</code>
* is generated by the following snippet:
* <code>
* <pre>
* Assignment e= ast.newAssignment();
* e.setLeftHandSide(ast.newSimpleName("foo"));
* e.setRightHandSide(ast.newBooleanLiteral(true));
* </pre>
* </code>
* </p>
*
* @param value the boolean value
* @return a new unparented boolean literal node
*/
public BooleanLiteral newBooleanLiteral(boolean value) {
BooleanLiteral result = new BooleanLiteral(this);
result.setBooleanValue(value);
return result;
}
/**
* Creates and returns a new unparented assignment expression node
* owned by this AST. By default, the assignment operator is "=" and
* the left and right hand side expressions are unspecified, but
* legal, names.
*
* @return a new unparented assignment expression node
*/
public Assignment newAssignment() {
Assignment result = new Assignment(this);
return result;
}
/**
* Creates an unparented method invocation expression node owned by this
* AST. By default, the name of the method is unspecified (but legal)
* there is no receiver expression, no type arguments, and the list of
* arguments is empty.
*
* @return a new unparented method invocation expression node
*/
public FunctionInvocation newFunctionInvocation() {
FunctionInvocation result = new FunctionInvocation(this);
return result;
}
/**
* Creates an unparented "super" method invocation expression node owned by
* this AST. By default, the name of the method is unspecified (but legal)
* there is no qualifier, no type arguments, and the list of arguments is empty.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return a new unparented "super" method invocation
* expression node
*/
public SuperMethodInvocation newSuperMethodInvocation() {
SuperMethodInvocation result = new SuperMethodInvocation(this);
return result;
}
/**
* Creates an unparented alternate constructor ("this(...);") invocation
* statement node owned by this AST. By default, the lists of arguments
* and type arguments are both empty.
* <p>
* Note that this type of node is a Statement, whereas a regular
* method invocation is an Expression. The only valid use of these
* statements are as the first statement of a constructor body.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return a new unparented alternate constructor invocation statement node
*/
public ConstructorInvocation newConstructorInvocation() {
ConstructorInvocation result = new ConstructorInvocation(this);
return result;
}
/**
* Creates an unparented alternate super constructor ("super(...);")
* invocation statement node owned by this AST. By default, there is no
* qualifier, no type arguments, and the list of arguments is empty.
* <p>
* Note that this type of node is a Statement, whereas a regular
* super method invocation is an Expression. The only valid use of these
* statements are as the first statement of a constructor body.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return a new unparented super constructor invocation statement node
*/
public SuperConstructorInvocation newSuperConstructorInvocation() {
SuperConstructorInvocation result =
new SuperConstructorInvocation(this);
return result;
}
/**
* Creates a new unparented local variable declaration expression node
* owned by this AST, for the given variable declaration fragment. By
* default, there are no modifiers and the base type is unspecified
* (but legal).
* <p>
* This method can be used to convert a variable declaration fragment
* (<code>VariableDeclarationFragment</code>) into an expression
* (<code>Expression</code>) by wrapping it. Additional variable
* declaration fragments can be added afterwards.
* </p>
*
* @param fragment the first variable declaration fragment
* @return a new unparented variable declaration expression node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* <li>the given fragment is null</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public VariableDeclarationExpression
newVariableDeclarationExpression(VariableDeclarationFragment fragment) {
if (fragment == null) {
throw new IllegalArgumentException();
}
VariableDeclarationExpression result =
new VariableDeclarationExpression(this);
result.fragments().add(fragment);
return result;
}
/**
* Creates a new unparented field declaration node owned by this AST,
* for the given variable declaration fragment. By default, there are no
* modifiers, no doc comment, and the base type is unspecified
* (but legal).
* <p>
* This method can be used to wrap a variable declaration fragment
* (<code>VariableDeclarationFragment</code>) into a field declaration
* suitable for inclusion in the body of a type declaration
* (<code>FieldDeclaration</code> implements <code>BodyDeclaration</code>).
* Additional variable declaration fragments can be added afterwards.
* </p>
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @param fragment the variable declaration fragment
* @return a new unparented field declaration node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* <li>the given fragment is null</li>
* </ul>
*/
public FieldDeclaration newFieldDeclaration(VariableDeclarationFragment fragment) {
if (fragment == null) {
throw new IllegalArgumentException();
}
FieldDeclaration result = new FieldDeclaration(this);
result.fragments().add(fragment);
return result;
}
/**
* Creates and returns a new unparented "this" expression node
* owned by this AST. By default, there is no qualifier.
*
* @return a new unparented "this" expression node
*/
public ThisExpression newThisExpression() {
ThisExpression result = new ThisExpression(this);
return result;
}
/**
* Creates and returns a new unparented field access expression node
* owned by this AST. By default, the expression and field are both
* unspecified, but legal, names.
*
* @return a new unparented field access expression node
*/
public FieldAccess newFieldAccess() {
FieldAccess result = new FieldAccess(this);
return result;
}
/**
* Creates and returns a new unparented super field access expression node
* owned by this AST. By default, the expression and field are both
* unspecified, but legal, names.
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return a new unparented super field access expression node
*/
public SuperFieldAccess newSuperFieldAccess() {
SuperFieldAccess result = new SuperFieldAccess(this);
return result;
}
/**
* Creates and returns a new unparented type literal expression node
* owned by this AST. By default, the type is unspecified (but legal).
*
* <p><b>Note: This Method only applies to ECMAScript 4 which is not yet supported</b></p>
*
* @return a new unparented type literal node
*/
public TypeLiteral newTypeLiteral() {
TypeLiteral result = new TypeLiteral(this);
return result;
}
/**
* Creates and returns a new unparented function expression node
* owned by this AST.
*
* @return a new unparented function expression node
*/
public FunctionExpression newFunctionExpression() {
FunctionExpression result = new FunctionExpression(this);
return result;
}
/**
* Creates and returns a new unparented object literal expression node
* owned by this AST.
*
* @return a new unparented object literal expression node
*/
public ObjectLiteral newObjectLiteral() {
ObjectLiteral result = new ObjectLiteral(this);
return result;
}
/**
* Creates and returns a new unparented object literal field expression node
* owned by this AST.
*
* @return a new unparented object literal field expression node
*/
public ObjectLiteralField newObjectLiteralField() {
ObjectLiteralField result = new ObjectLiteralField(this);
return result;
}
/**
* Creates and returns a new unparented parenthesized expression node
* owned by this AST. By default, the expression is unspecified (but legal).
*
* @return a new unparented parenthesized expression node
*/
public ParenthesizedExpression newParenthesizedExpression() {
ParenthesizedExpression result = new ParenthesizedExpression(this);
return result;
}
/**
* Creates and returns a new unparented infix expression node
* owned by this AST. By default, the operator and left and right
* operand are unspecified (but legal), and there are no extended
* operands.
*
* @return a new unparented infix expression node
*/
public InfixExpression newInfixExpression() {
InfixExpression result = new InfixExpression(this);
return result;
}
/**
* Creates and returns a new unparented instanceof expression node
* owned by this AST. By default, the operator and left and right
* operand are unspecified (but legal).
*
* @return a new unparented instanceof expression node
*/
public InstanceofExpression newInstanceofExpression() {
InstanceofExpression result = new InstanceofExpression(this);
return result;
}
/**
* Creates and returns a new unparented postfix expression node
* owned by this AST. By default, the operator and operand are
* unspecified (but legal).
*
* @return a new unparented postfix expression node
*/
public PostfixExpression newPostfixExpression() {
PostfixExpression result = new PostfixExpression(this);
return result;
}
/**
* Creates and returns a new unparented prefix expression node
* owned by this AST. By default, the operator and operand are
* unspecified (but legal).
*
* @return a new unparented prefix expression node
*/
public PrefixExpression newPrefixExpression() {
PrefixExpression result = new PrefixExpression(this);
return result;
}
/**
* Creates and returns a new unparented array access expression node
* owned by this AST. By default, the array and index expression are
* both unspecified (but legal).
*
* @return a new unparented array access expression node
*/
public ArrayAccess newArrayAccess() {
ArrayAccess result = new ArrayAccess(this);
return result;
}
/**
* Creates and returns a new unparented array creation expression node
* owned by this AST. By default, the array type is an unspecified
* 1-dimensional array, the list of dimensions is empty, and there is no
* array initializer.
*
* @return a new unparented array creation expression node
*/
public ArrayCreation newArrayCreation() {
ArrayCreation result = new ArrayCreation(this);
return result;
}
/**
* Creates and returns a new unparented class instance creation
* ("new") expression node owned by this AST. By default,
* there is no qualifying expression, no type parameters,
* an unspecified (but legal) type name, an empty list of
* arguments, and does not declare an anonymous class declaration.
*
* @return a new unparented class instance creation expression node
*/
public ClassInstanceCreation newClassInstanceCreation() {
ClassInstanceCreation result = new ClassInstanceCreation(this);
return result;
}
/**
* Creates and returns a new unparented anonymous class declaration
* node owned by this AST. By default, the body declaration list is empty.
*
* @return a new unparented anonymous class declaration node
*/
public AnonymousClassDeclaration newAnonymousClassDeclaration() {
AnonymousClassDeclaration result = new AnonymousClassDeclaration(this);
return result;
}
/**
* Creates and returns a new unparented array initializer node
* owned by this AST. By default, the initializer has no expressions.
*
* @return a new unparented array initializer node
*/
public ArrayInitializer newArrayInitializer() {
ArrayInitializer result = new ArrayInitializer(this);
return result;
}
/**
* Creates and returns a new unparented conditional expression node
* owned by this AST. By default, the condition and both expressions
* are unspecified (but legal).
*
* @return a new unparented array conditional expression node
*/
public ConditionalExpression newConditionalExpression() {
ConditionalExpression result = new ConditionalExpression(this);
return result;
}
/**
* Enables the recording of changes to the given compilation
* unit and its descendents. The javaScript unit must have
* been created by <code>ASTParser</code> and still be in
* its original state. Once recording is on,
* arbitrary changes to the subtree rooted at the compilation
* unit are recorded internally. Once the modification has
* been completed, call <code>rewrite</code> to get an object
* representing the corresponding edits to the original
* source code string.
*
* @exception IllegalArgumentException if this javaScript unit is
* marked as unmodifiable, or if this javaScript unit has already
* been tampered with, or if recording has already been enabled,
* or if <code>root</code> is not owned by this AST
* @see JavaScriptUnit#recordModifications()
*/
void recordModifications(JavaScriptUnit root) {
if(this.modificationCount != this.originalModificationCount) {
throw new IllegalArgumentException("AST is already modified"); //$NON-NLS-1$
} else if(this.rewriter != null) {
throw new IllegalArgumentException("AST modifications are already recorded"); //$NON-NLS-1$
} else if((root.getFlags() & ASTNode.PROTECT) != 0) {
throw new IllegalArgumentException("Root node is unmodifiable"); //$NON-NLS-1$
} else if(root.getAST() != this) {
throw new IllegalArgumentException("Root node is not owned by this ast"); //$NON-NLS-1$
}
this.rewriter = new InternalASTRewrite(root);
this.setEventHandler(this.rewriter);
}
/**
* Converts all modifications recorded into an object
* representing the corresponding text edits to the
* given document containing the original source
* code for the javaScript unit that gave rise to
* this AST.
*
* @param document original document containing source code
* for the javaScript unit
* @param options the table of formatter options
* (key type: <code>String</code>; value type: <code>String</code>);
* or <code>null</code> to use the standard global options
* {@link JavaScriptCore#getOptions() JavaScriptCore.getOptions()}.
* @return text edit object describing the changes to the
* document corresponding to the recorded AST modifications
* @exception IllegalArgumentException if the document passed is
* <code>null</code> or does not correspond to this AST
* @exception IllegalStateException if <code>recordModifications</code>
* was not called to enable recording
* @see JavaScriptUnit#rewrite(IDocument, Map)
*/
TextEdit rewrite(IDocument document, Map options) {
if (document == null) {
throw new IllegalArgumentException();
}
if (this.rewriter == null) {
throw new IllegalStateException("Modifications record is not enabled"); //$NON-NLS-1$
}
return this.rewriter.rewriteAST(document, options);
}
/**
* Returns true if the ast tree was created with bindings, false otherwise
*
* @return true if the ast tree was created with bindings, false otherwise
*/
public boolean hasResolvedBindings() {
return (this.bits & RESOLVED_BINDINGS) != 0;
}
/**
* Returns true if the ast tree was created with statements recovery, false otherwise
*
* @return true if the ast tree was created with statements recovery, false otherwise
*/
public boolean hasStatementsRecovery() {
return (this.bits & IJavaScriptUnit.ENABLE_STATEMENTS_RECOVERY) != 0;
}
/**
* Returns true if the ast tree was created with bindings recovery, false otherwise
*
* @return true if the ast tree was created with bindings recovery, false otherwise
*/
public boolean hasBindingsRecovery() {
return (this.bits & IJavaScriptUnit.ENABLE_BINDINGS_RECOVERY) != 0;
}
void setFlag(int newValue) {
this.bits |= newValue;
}
}