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/*******************************************************************************
* Copyright (c) 2012, 2014 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.ui.handler;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.te.runtime.callback.AsyncCallbackCollector;
import org.eclipse.tcf.te.runtime.callback.Callback;
import org.eclipse.tcf.te.runtime.interfaces.callback.ICallback;
import org.eclipse.tcf.te.tcf.core.async.CallbackInvocationDelegate;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerNode;
import org.eclipse.tcf.te.tcf.locator.interfaces.services.IPeerModelRefreshService;
import org.eclipse.tcf.te.ui.views.ViewsUtil;
import org.eclipse.tcf.te.ui.views.interfaces.IUIConstants;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* Refresh handler implementation.
*/
public class RefreshPeerNodeHandler extends AbstractHandler {
/* (non-Javadoc)
* @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
*/
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
// Get the current selection
ISelection selection = HandlerUtil.getCurrentSelection(event);
// Refresh the selection
if (selection != null) refresh(selection, new Callback() {
@Override
protected void internalDone(Object caller, IStatus status) {
// Refresh the view
ViewsUtil.refresh(IUIConstants.ID_EXPLORER);
}
});
return null;
}
/**
* Refresh the elements of the given selection.
*
* @param selection The selection. Must not be <code>null</code>.
* @param callback The callback. Must not be <code>null</code>:
*/
public void refresh(final ISelection selection, final ICallback callback) {
Assert.isTrue(!Protocol.isDispatchThread(), "Illegal Thread Access"); //$NON-NLS-1$
Assert.isNotNull(selection);
Assert.isNotNull(callback);
// The selection must be a structured selection and must not be empty
if (selection instanceof IStructuredSelection && !selection.isEmpty()) {
// The list of locator model instances to refresh
List<IPeerModel> locatorToRefresh = new ArrayList<IPeerModel>();
List<IPeerNode> peerToRefresh = new ArrayList<IPeerNode>();
// Iterate the selection and determine the model instances
Iterator<?> iterator = ((IStructuredSelection)selection).iterator();
while (iterator.hasNext()) {
Object element = iterator.next();
Assert.isTrue(element instanceof IPeerNode);
IPeerNode node = (IPeerNode)element;
// Get the associated locator model of the node
IPeerModel model = (IPeerModel)node.getAdapter(IPeerModel.class);
Assert.isNotNull(model);
// If not yet in the list, add it
if (!locatorToRefresh.contains(model)) {
locatorToRefresh.add(model);
}
if (!peerToRefresh.contains(node)) {
peerToRefresh.add(node);
}
}
// Trigger an refresh on all determined models and wait for the
// refresh to complete. Once completed, fire the parent callback.
AsyncCallbackCollector collector = new AsyncCallbackCollector(callback, new CallbackInvocationDelegate());
for (IPeerModel model : locatorToRefresh) {
final IPeerModel finModel = model;
final ICallback innerCallback = new AsyncCallbackCollector.SimpleCollectorCallback(collector);
Runnable runnable = new Runnable() {
@Override
public void run() {
finModel.getService(IPeerModelRefreshService.class).refresh(new Callback() {
@Override
protected void internalDone(Object caller, IStatus status) {
innerCallback.done(this, Status.OK_STATUS);
}
});
}
};
Protocol.invokeLater(runnable);
}
// Mark the collector as fully initialized
collector.initDone();
} else {
callback.done(this, Status.OK_STATUS);
}
}
}
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