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/*******************************************************************************
* Copyright (c) 2011, 2012 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
*******************************************************************************/
package org.eclipse.tcf.te.tcf.filesystem.core.internal.operations;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.protocol.IChannel;
import org.eclipse.tcf.services.IFileSystem;
import org.eclipse.tcf.te.tcf.core.Tcf;
import org.eclipse.tcf.te.tcf.filesystem.core.internal.exceptions.TCFException;
import org.eclipse.tcf.te.tcf.filesystem.core.internal.exceptions.TCFFileSystemException;
import org.eclipse.tcf.te.tcf.filesystem.core.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.core.nls.Messages;
/**
* FSRefresh refreshes a specified tree node and its children and grand children recursively.
*/
public class OpRefresh extends Operation {
//The root node to be refreshed.
FSTreeNode node;
/**
* Create an FSRefresh to refresh the specified node and its descendants.
*
* @param node The root node to be refreshed.
*/
public OpRefresh(FSTreeNode node) {
this.node = node;
}
/**
* Create an FSRefresh to refresh the specified nodes and its descendants.
*
* @param nodes The node list to be refreshed.
*/
public OpRefresh(List<FSTreeNode> nodes) {
this.node = getAncestor(nodes);
}
/*
* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.Operation#run(org.eclipse.core.runtime.IProgressMonitor)
*/
@Override
public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
super.run(monitor);
if (node != null && (node.childrenQueried || node.isFile())) {
IChannel channel = null;
try {
channel = openChannel(node.peerNode.getPeer());
if (channel != null) {
IFileSystem service = getBlockingFileSystem(channel);
if (service != null) {
refresh(node, service);
}
else {
String message = NLS.bind(Messages.Operation_NoFileSystemError, node.peerNode.getPeerId());
throw new TCFFileSystemException(IStatus.ERROR, message);
}
}
}
catch (TCFException e) {
throw new InvocationTargetException(e, e.getMessage());
}
finally {
if (channel != null) Tcf.getChannelManager().closeChannel(channel);
monitor.done();
}
}
else {
monitor.done();
}
}
/**
* Refresh the specified node and its children recursively using the file system service.
*
* @param node The node to be refreshed.
* @param service The file system service.
* @throws TCFFileSystemException Thrown during refreshing.
*/
void refresh(final FSTreeNode node, final IFileSystem service) throws InterruptedException {
if(monitor.isCanceled()) throw new InterruptedException();
if ((node.isSystemRoot() || node.isDirectory()) && node.childrenQueried) {
if (!node.isSystemRoot()) {
try {
updateChildren(node, service);
}
catch (TCFException e) {
}
}
monitor.worked(1);
List<FSTreeNode> children = node.getChildren();
for (FSTreeNode child : children) {
refresh(child, service);
}
}
else if(node.isFile()) {
node.refresh();
}
}
/**
* Update the children of the specified folder node using the file system service.
*
* @param node The folder node.
* @param service The file system service.
* @throws TCFFileSystemException Thrown during querying the children nodes.
*/
protected void updateChildren(final FSTreeNode node, final IFileSystem service) throws TCFFileSystemException, InterruptedException {
if(monitor.isCanceled()) throw new InterruptedException();
List<FSTreeNode> current = node.getChildren();
List<FSTreeNode> latest = queryChildren(node, service);
List<FSTreeNode> newNodes = diff(latest, current);
List<FSTreeNode> deleted = diff(current, latest);
node.removeChildren(deleted);
node.addChidren(newNodes);
}
/**
* Find those nodes which are in aList yet not in bList and return them as a list.
*
* @param aList
* @param bList
* @return the difference list.
*/
private List<FSTreeNode> diff(List<FSTreeNode> aList, List<FSTreeNode> bList) {
List<FSTreeNode> newList = new ArrayList<FSTreeNode>();
for (FSTreeNode aNode : aList) {
boolean found = false;
for (FSTreeNode bNode : bList) {
if (aNode.name.equals(bNode.name)) {
found = true;
break;
}
}
if (!found) {
newList.add(aNode);
}
}
return newList;
}
/*
* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.filesystem.core.interfaces.IOperation#getName()
*/
@Override
public String getName() {
return NLS.bind(Messages.OpRefresh_RefreshJobTitle, node == null ? "" : node.name); //$NON-NLS-1$
}
/*
* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.Operation#getTotalWork()
*/
@Override
public int getTotalWork() {
return count(node);
}
/**
* Count the nodes that should be refreshed under
* the specified directory.
*
* @param node The specified directory.
* @return the total count of the qualified nodes.
*/
private int count(FSTreeNode node) {
if ((node.isSystemRoot() || node.isDirectory()) && node.childrenQueried) {
int total = 1;
List<FSTreeNode> children = node.getChildren();
for (FSTreeNode child : children) {
total += count(child);
}
return total;
}
return 0;
}
}
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