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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
* William Chen (Wind River)- [345552] Edit the remote files with a proper editor
*******************************************************************************/
package org.eclipse.tcf.te.tcf.filesystem.internal.compare;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.te.tcf.filesystem.activator.UIPlugin;
import org.eclipse.tcf.te.tcf.filesystem.internal.utils.CacheManager;
import org.eclipse.tcf.te.tcf.filesystem.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.nls.Messages;
/**
* A <code>RemoteTypedElement</code> wraps an <code>FSTreeNode</code> so that it
* can be used as input for the differencing engine (<code>ITypedElement</code>)
* as the right element of the comparison editor.
*
* @since 3.7
*/
public class RemoteTypedElement extends MergeTypedElement {
/**
* Creates a <code>RemoteTypedElement</code> for the given node.
*
* @param node
* the tree node.
*/
public RemoteTypedElement(FSTreeNode node) {
super(node);
}
/**
* Return an input stream that opens that remote file to provide the stream
* content.
*
* @return a buffered input stream containing the contents of this file
* @exception CoreException
* if the contents of this storage could not be accessed
*/
@Override
protected InputStream createStream() throws CoreException {
try {
return node.getLocationURL().openStream();
} catch (IOException e) {
Status error = new Status(IStatus.ERROR,
UIPlugin.getUniqueIdentifier(), e.getLocalizedMessage(), e);
throw new CoreException(error);
}
}
/**
* Download the remote file and save the content so that it is cached for
* getContents call.
*
* @param monitor
* The monitor used to display downloading progress.
* @throws InvocationTargetException
* throws when an exception occurs during downloading.
*/
public void cacheContents(IProgressMonitor monitor)
throws InvocationTargetException {
monitor.beginTask(
NLS.bind(Messages.CacheManager_DowloadingFile, node.name), 100);
OutputStream output = null;
try {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
output = new BufferedOutputStream(baos);
monitor.beginTask(Messages.RemoteTypedElement_GettingRemoteContent
+ node.name, 100);
CacheManager.getInstance().download2OutputStream(node, output, monitor);
if (!monitor.isCanceled()) {
setContent(baos.toByteArray());
}
} catch (IOException e) {
throw new InvocationTargetException(e);
}
}
/**
* Return the external form of the URL to the remote file of this node. It
* is used to compute its hash code and as the title of the comparison
* editor.
*/
@Override
public String toString() {
return node.getLocationURI().toString();
}
}
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