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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.compare.internal;
import java.io.*;
import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.*;
import org.eclipse.compare.*;
import org.eclipse.compare.structuremergeviewer.IStructureComparator;
/**
* A buffer for a workspace resource.
*/
public class BufferedResourceNode extends ResourceNode {
private boolean fDirty= false;
private IFile fDeleteFile;
/**
* Creates a <code>ResourceNode</code> for the given resource.
*
* @param resource the resource
*/
public BufferedResourceNode(IResource resource) {
super(resource);
}
/**
* Returns <code>true</code> if buffer contains uncommitted changes.
*/
public boolean isDirty() {
return fDirty;
}
protected IStructureComparator createChild(IResource child) {
return new BufferedResourceNode(child);
}
public void setContent(byte[] contents) {
fDirty= true;
super.setContent(contents);
}
/**
* Commits buffered contents to resource.
*/
public void commit(IProgressMonitor pm) throws CoreException {
if (fDirty) {
if (fDeleteFile != null) {
fDeleteFile.delete(true, true, pm);
return;
}
IResource resource= getResource();
if (resource instanceof IFile) {
byte[] bytes= getContent();
ByteArrayInputStream is= new ByteArrayInputStream(bytes);
try {
IFile file= (IFile) resource;
if (file.exists())
file.setContents(is, false, true, pm);
else
file.create(is, false, pm);
fDirty= false;
} finally {
if (is != null)
try {
is.close();
} catch(IOException ex) {
// Silently ignored
}
}
}
}
}
public ITypedElement replace(ITypedElement child, ITypedElement other) {
if (child == null) { // add resource
// create a node without a resource behind it!
IResource resource= getResource();
if (resource instanceof IFolder) {
IFolder folder= (IFolder) resource;
IFile file= folder.getFile(other.getName());
child= new BufferedResourceNode(file);
}
}
if (other == null) { // delete resource
IResource resource= getResource();
if (resource instanceof IFolder) {
IFolder folder= (IFolder) resource;
IFile file= folder.getFile(child.getName());
if (file != null && file.exists()) {
fDeleteFile= file;
fDirty= true;
}
}
return null;
}
if (other instanceof IStreamContentAccessor && child instanceof IEditableContent) {
IEditableContent dst= (IEditableContent) child;
try {
InputStream is= ((IStreamContentAccessor)other).getContents();
byte[] bytes= Utilities.readBytes(is);
if (bytes != null)
dst.setContent(bytes);
} catch (CoreException ex) {
// NeedWork
}
}
return child;
}
}
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