/*******************************************************************************
* Copyright (c) 2000, 2008 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.jdt.internal.core;
import java.util.HashMap;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jdt.core.*;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jdt.internal.core.util.DOMFinder;
import org.eclipse.jdt.internal.core.util.MementoTokenizer;
import org.eclipse.jdt.internal.core.util.Messages;
/**
* Abstract class for Java elements which implement ISourceReference.
*/
public abstract class SourceRefElement extends JavaElement implements ISourceReference {
/*
* A count to uniquely identify this element in the case
* that a duplicate named element exists. For example, if
* there are two fields in a compilation unit with the
* same name, the occurrence count is used to distinguish
* them. The occurrence count starts at 1 (thus the first
* occurrence is occurrence 1, not occurrence 0).
*/
public int occurrenceCount = 1;
protected SourceRefElement(JavaElement parent) {
super(parent);
}
/**
* This element is being closed. Do any necessary cleanup.
*/
protected void closing(Object info) throws JavaModelException {
// Do any necessary cleanup
}
/**
* Returns a new element info for this element.
*/
protected Object createElementInfo() {
return null; // not used for source ref elements
}
/**
* @see ISourceManipulation
*/
public void copy(IJavaElement container, IJavaElement sibling, String rename, boolean force, IProgressMonitor monitor) throws JavaModelException {
if (container == null) {
throw new IllegalArgumentException(Messages.operation_nullContainer);
}
IJavaElement[] elements= new IJavaElement[] {this};
IJavaElement[] containers= new IJavaElement[] {container};
IJavaElement[] siblings= null;
if (sibling != null) {
siblings= new IJavaElement[] {sibling};
}
String[] renamings= null;
if (rename != null) {
renamings= new String[] {rename};
}
getJavaModel().copy(elements, containers, siblings, renamings, force, monitor);
}
/**
* @see ISourceManipulation
*/
public void delete(boolean force, IProgressMonitor monitor) throws JavaModelException {
IJavaElement[] elements = new IJavaElement[] {this};
getJavaModel().delete(elements, force, monitor);
}
public boolean equals(Object o) {
if (!(o instanceof SourceRefElement)) return false;
return this.occurrenceCount == ((SourceRefElement)o).occurrenceCount &&
super.equals(o);
}
/**
* Returns the <code>ASTNode</code> that corresponds to this <code>JavaElement</code>
* or <code>null</code> if there is no corresponding node.
*/
public ASTNode findNode(CompilationUnit ast) {
DOMFinder finder = new DOMFinder(ast, this, false);
try {
return finder.search();
} catch (JavaModelException e) {
// receiver doesn't exist
return null;
}
}
/*
* @see JavaElement#generateInfos
*/
protected void generateInfos(Object info, HashMap newElements, IProgressMonitor pm) throws JavaModelException {
Openable openableParent = (Openable)getOpenableParent();
if (openableParent == null) return;
JavaElementInfo openableParentInfo = (JavaElementInfo) JavaModelManager.getJavaModelManager().getInfo(openableParent);
if (openableParentInfo == null) {
openableParent.generateInfos(openableParent.createElementInfo(), newElements, pm);
}
}
public IAnnotation getAnnotation(String name) {
return new Annotation(this, name);
}
public IAnnotation[] getAnnotations() throws JavaModelException {
AnnotatableInfo info = (AnnotatableInfo) getElementInfo();
return info.annotations;
}
/**
* @see IMember
*/
public ICompilationUnit getCompilationUnit() {
return (ICompilationUnit) getAncestor(COMPILATION_UNIT);
}
/**
* Elements within compilation units and class files have no
* corresponding resource.
*
* @see IJavaElement
*/
public IResource getCorrespondingResource() throws JavaModelException {
if (!exists()) throw newNotPresentException();
return null;
}
/*
* @see JavaElement
*/
public IJavaElement getHandleFromMemento(String token, MementoTokenizer memento, WorkingCopyOwner workingCopyOwner) {
switch (token.charAt(0)) {
case JEM_COUNT:
return getHandleUpdatingCountFromMemento(memento, workingCopyOwner);
}
return this;
}
protected void getHandleMemento(StringBuffer buff) {
super.getHandleMemento(buff);
if (this.occurrenceCount > 1) {
buff.append(JEM_COUNT);
buff.append(this.occurrenceCount);
}
}
/*
* Update the occurence count of the receiver and creates a Java element handle from the given memento.
* The given working copy owner is used only for compilation unit handles.
*/
public IJavaElement getHandleUpdatingCountFromMemento(MementoTokenizer memento, WorkingCopyOwner owner) {
if (!memento.hasMoreTokens()) return this;
this.occurrenceCount = Integer.parseInt(memento.nextToken());
if (!memento.hasMoreTokens()) return this;
String token = memento.nextToken();
return getHandleFromMemento(token, memento, owner);
}
/*
* @see IMember#getOccurrenceCount()
*/
public int getOccurrenceCount() {
return this.occurrenceCount;
}
/**
* Return the first instance of IOpenable in the hierarchy of this
* type (going up the hierarchy from this type);
*/
public IOpenable getOpenableParent() {
IJavaElement current = getParent();
while (current != null){
if (current instanceof IOpenable){
return (IOpenable) current;
}
current = current.getParent();
}
return null;
}
/*
* @see IJavaElement
*/
public IPath getPath() {
return getParent().getPath();
}
/*
* @see IJavaElement
*/
public IResource resource() {
return this.parent.resource();
}
/**
* @see ISourceReference
*/
public String getSource() throws JavaModelException {
IOpenable openable = getOpenableParent();
IBuffer buffer = openable.getBuffer();
if (buffer == null) {
return null;
}
ISourceRange range = getSourceRange();
int offset = range.getOffset();
int length = range.getLength();
if (offset == -1 || length == 0 ) {
return null;
}
try {
return buffer.getText(offset, length);
} catch(RuntimeException e) {
return null;
}
}
/**
* @see ISourceReference
*/
public ISourceRange getSourceRange() throws JavaModelException {
SourceRefElementInfo info = (SourceRefElementInfo) getElementInfo();
return info.getSourceRange();
}
/**
* @see IJavaElement
*/
public IResource getUnderlyingResource() throws JavaModelException {
if (!exists()) throw newNotPresentException();
return getParent().getUnderlyingResource();
}
/**
* @see IParent
*/
public boolean hasChildren() throws JavaModelException {
return getChildren().length > 0;
}
/**
* @see IJavaElement
*/
public boolean isStructureKnown() throws JavaModelException {
// structure is always known inside an openable
return true;
}
/**
* @see ISourceManipulation
*/
public void move(IJavaElement container, IJavaElement sibling, String rename, boolean force, IProgressMonitor monitor) throws JavaModelException {
if (container == null) {
throw new IllegalArgumentException(Messages.operation_nullContainer);
}
IJavaElement[] elements= new IJavaElement[] {this};
IJavaElement[] containers= new IJavaElement[] {container};
IJavaElement[] siblings= null;
if (sibling != null) {
siblings= new IJavaElement[] {sibling};
}
String[] renamings= null;
if (rename != null) {
renamings= new String[] {rename};
}
getJavaModel().move(elements, containers, siblings, renamings, force, monitor);
}
/**
* @see ISourceManipulation
*/
public void rename(String newName, boolean force, IProgressMonitor monitor) throws JavaModelException {
if (newName == null) {
throw new IllegalArgumentException(Messages.element_nullName);
}
IJavaElement[] elements= new IJavaElement[] {this};
IJavaElement[] dests= new IJavaElement[] {getParent()};
String[] renamings= new String[] {newName};
getJavaModel().rename(elements, dests, renamings, force, monitor);
}
protected void toStringName(StringBuffer buffer) {
super.toStringName(buffer);
if (this.occurrenceCount > 1) {
buffer.append("#"); //$NON-NLS-1$
buffer.append(this.occurrenceCount);
}
}
}