/*******************************************************************************
* Copyright (c) 2000, 2011 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.che.ide.ext.java.jdt.internal.corext.dom;
import org.eclipse.che.ide.ext.java.jdt.core.dom.AST;
import org.eclipse.che.ide.ext.java.jdt.core.dom.ASTNode;
import org.eclipse.che.ide.ext.java.jdt.core.dom.ASTParser;
import org.eclipse.che.ide.ext.java.jdt.core.dom.AbstractTypeDeclaration;
import org.eclipse.che.ide.ext.java.jdt.core.dom.CompilationUnit;
import org.eclipse.che.ide.ext.java.jdt.core.dom.Expression;
import org.eclipse.che.ide.ext.java.jdt.core.dom.IExtendedModifier;
import org.eclipse.che.ide.ext.java.jdt.core.dom.ITypeBinding;
import org.eclipse.che.ide.ext.java.jdt.core.dom.InfixExpression;
import org.eclipse.che.ide.ext.java.jdt.core.dom.InfixExpression.Operator;
import org.eclipse.che.ide.ext.java.jdt.core.dom.MethodDeclaration;
import org.eclipse.che.ide.ext.java.jdt.core.dom.Modifier;
import org.eclipse.che.ide.ext.java.jdt.core.dom.Name;
import org.eclipse.che.ide.ext.java.jdt.core.dom.NodeFinder;
import org.eclipse.che.ide.ext.java.jdt.core.dom.PrimitiveType;
import org.eclipse.che.ide.ext.java.jdt.core.dom.SingleVariableDeclaration;
import org.eclipse.che.ide.ext.java.jdt.core.dom.Type;
import org.eclipse.che.ide.ext.java.jdt.core.dom.TypeDeclaration;
import org.eclipse.che.ide.ext.java.jdt.core.dom.TypeParameter;
import org.eclipse.che.ide.ext.java.jdt.core.dom.UnionType;
import org.eclipse.che.ide.ext.java.jdt.core.dom.VariableDeclaration;
import org.eclipse.che.ide.ext.java.jdt.core.dom.rewrite.ImportRewrite;
import org.eclipse.che.ide.ext.java.jdt.core.dom.rewrite.ImportRewrite.ImportRewriteContext;
import java.util.ArrayList;
import java.util.List;
public class ASTNodeFactory {
private static final String STATEMENT_HEADER = "class __X__ { void __x__() { "; //$NON-NLS-1$
private static final String STATEMENT_FOOTER = "}}"; //$NON-NLS-1$
private static final String TYPE_HEADER = "class __X__ { abstract "; //$NON-NLS-1$
private static final String TYPE_FOOTER = " __f__(); }}"; //$NON-NLS-1$
private static final String TYPEPARAM_HEADER = "class __X__ { abstract <"; //$NON-NLS-1$
private static final String TYPEPARAM_FOOTER = "> void __f__(); }}"; //$NON-NLS-1$
private static class PositionClearer extends GenericVisitor {
public PositionClearer() {
super(true);
}
@Override
protected boolean visitNode(ASTNode node) {
node.setSourceRange(-1, 0);
return true;
}
}
private ASTNodeFactory() {
// no instance;
}
public static ASTNode newStatement(AST ast, String content) {
StringBuffer buffer = new StringBuffer(STATEMENT_HEADER);
buffer.append(content);
buffer.append(STATEMENT_FOOTER);
ASTParser p = ASTParser.newParser(ast.apiLevel());
p.setSource(buffer.toString().toCharArray());
CompilationUnit root = (CompilationUnit)p.createAST();
ASTNode result = ASTNode.copySubtree(ast, NodeFinder.perform(root, STATEMENT_HEADER.length(), content.length()));
result.accept(new PositionClearer());
return result;
}
public static Name newName(AST ast, String qualifiedName) {
return ast.newName(qualifiedName);
}
public static TypeParameter newTypeParameter(AST ast, String content) {
StringBuffer buffer = new StringBuffer(TYPEPARAM_HEADER);
buffer.append(content);
buffer.append(TYPEPARAM_FOOTER);
ASTParser p = ASTParser.newParser(ast.apiLevel());
p.setSource(buffer.toString().toCharArray());
CompilationUnit root = (CompilationUnit)p.createAST();
List<AbstractTypeDeclaration> list = root.types();
TypeDeclaration typeDecl = (TypeDeclaration)list.get(0);
MethodDeclaration methodDecl = typeDecl.getMethods()[0];
TypeParameter tp = (TypeParameter)methodDecl.typeParameters().get(0);
ASTNode result = ASTNode.copySubtree(ast, tp);
result.accept(new PositionClearer());
return (TypeParameter)result;
}
public static Type newType(AST ast, String content) {
StringBuffer buffer = new StringBuffer(TYPE_HEADER);
buffer.append(content);
buffer.append(TYPE_FOOTER);
ASTParser p = ASTParser.newParser(ast.apiLevel());
p.setSource(buffer.toString().toCharArray());
CompilationUnit root = (CompilationUnit)p.createAST();
List<AbstractTypeDeclaration> list = root.types();
TypeDeclaration typeDecl = (TypeDeclaration)list.get(0);
MethodDeclaration methodDecl = typeDecl.getMethods()[0];
ASTNode type = methodDecl.getReturnType2();
ASTNode result = ASTNode.copySubtree(ast, type);
result.accept(new PositionClearer());
return (Type)result;
}
/**
* Returns the new type node corresponding to the type of the given declaration
* including the extra dimensions.
*
* @param ast
* The AST to create the resulting type with.
* @param declaration
* The variable declaration to get the type from
* @return a new type node created with the given AST.
*/
public static Type newType(AST ast, VariableDeclaration declaration) {
return newType(ast, declaration, null, null);
}
/**
* Returns the new type node corresponding to the type of the given declaration
* including the extra dimensions. If the type is a {@link UnionType}, use the LUB type.
* If the <code>importRewrite</code> is <code>null</code>, the type may be fully-qualified.
*
* @param ast
* The AST to create the resulting type with.
* @param declaration
* The variable declaration to get the type from
* @param importRewrite
* the import rewrite to use, or <code>null</code>
* @param context
* the import rewrite context, or <code>null</code>
* @return a new type node created with the given AST.
* @since 3.7.1
*/
public static Type newType(AST ast, VariableDeclaration declaration, ImportRewrite importRewrite,
ImportRewriteContext context) {
Type type = ASTNodes.getType(declaration);
if (declaration instanceof SingleVariableDeclaration) {
Type type2 = ((SingleVariableDeclaration)declaration).getType();
if (type2 instanceof UnionType) {
ITypeBinding typeBinding = type2.resolveBinding();
if (typeBinding != null) {
if (importRewrite != null) {
type = importRewrite.addImport(typeBinding, ast, context);
return type;
} else {
String qualifiedName = typeBinding.getQualifiedName();
if (qualifiedName.length() > 0) {
type = ast.newSimpleType(ast.newName(qualifiedName));
return type;
}
}
}
// XXX: fallback for intersection types or unresolved types: take first type of union
type = (Type)((UnionType)type2).types().get(0);
return type;
}
}
int extraDim = declaration.getExtraDimensions();
type = (Type)ASTNode.copySubtree(ast, type);
for (int i = 0; i < extraDim; i++) {
type = ast.newArrayType(type);
}
return type;
}
/**
* Returns an expression that is assignable to the given type. <code>null</code> is
* returned if the type is the 'void' type.
*
* @param ast
* The AST to create the expression for
* @param type
* The type of the returned expression
* @param extraDimensions
* Extra dimensions to the type
* @return the Null-literal for reference types, a boolean-literal for a boolean type, a number
* literal for primitive types or <code>null</code> if the type is void.
*/
public static Expression newDefaultExpression(AST ast, Type type, int extraDimensions) {
if (extraDimensions == 0 && type.isPrimitiveType()) {
PrimitiveType primitiveType = (PrimitiveType)type;
if (primitiveType.getPrimitiveTypeCode() == PrimitiveType.BOOLEAN) {
return ast.newBooleanLiteral(false);
} else if (primitiveType.getPrimitiveTypeCode() == PrimitiveType.VOID) {
return null;
} else {
return ast.newNumberLiteral("0"); //$NON-NLS-1$
}
}
return ast.newNullLiteral();
}
/**
* Returns an expression that is assignable to the given type binding. <code>null</code> is
* returned if the type is the 'void' type.
*
* @param ast
* The AST to create the expression for
* @param type
* The type binding to which the returned expression is compatible to
* @return the Null-literal for reference types, a boolean-literal for a boolean type, a number
* literal for primitive types or <code>null</code> if the type is void.
*/
public static Expression newDefaultExpression(AST ast, ITypeBinding type) {
if (type.isPrimitive()) {
String name = type.getName();
if ("boolean".equals(name)) { //$NON-NLS-1$
return ast.newBooleanLiteral(false);
} else if ("void".equals(name)) { //$NON-NLS-1$
return null;
} else {
return ast.newNumberLiteral("0"); //$NON-NLS-1$
}
}
return ast.newNullLiteral();
}
/**
* Returns a list of newly created Modifier nodes corresponding to the given modifier flags.
*
* @param ast
* The AST to create the nodes for.
* @param modifiers
* The modifier flags describing the modifier nodes to create.
* @return Returns a list of nodes of type {@link Modifier}.
*/
public static List<Modifier> newModifiers(AST ast, int modifiers) {
return ast.newModifiers(modifiers);
}
/**
* Returns a list of newly created Modifier nodes corresponding to a given list of existing modifiers.
*
* @param ast
* The AST to create the nodes for.
* @param modifierNodes
* The modifier nodes describing the modifier nodes to create. Only
* nodes of type {@link Modifier} are looked at and cloned. To create a full copy of the list consider
* to use {@link ASTNode#copySubtrees(AST, List)}.
* @return Returns a list of nodes of type {@link Modifier}.
*/
public static List<Modifier> newModifiers(AST ast, List<? extends IExtendedModifier> modifierNodes) {
List<Modifier> res = new ArrayList<Modifier>(modifierNodes.size());
for (int i = 0; i < modifierNodes.size(); i++) {
Object curr = modifierNodes.get(i);
if (curr instanceof Modifier) {
res.add(ast.newModifier(((Modifier)curr).getKeyword()));
}
}
return res;
}
public static Expression newInfixExpression(AST ast, Operator operator, ArrayList<Expression> operands) {
if (operands.size() == 1)
return operands.get(0);
InfixExpression result = ast.newInfixExpression();
result.setOperator(operator);
result.setLeftOperand(operands.get(0));
result.setRightOperand(operands.get(1));
result.extendedOperands().addAll(operands.subList(2, operands.size()));
return result;
}
}