plugins/org.symbian.tools.tmw.previewer/src/org/symbian/tools/tmw/previewer/CommandHandlerManager.java
/**
* Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Symbian Foundation - initial contribution.
* Contributors:
* Description:
* Overview:
* Details:
* Platforms/Drives/Compatibility:
* Assumptions/Requirement/Pre-requisites:
* Failures and causes:
*/
package org.symbian.tools.tmw.previewer;
import java.text.MessageFormat;
import java.util.Map;
import java.util.TreeMap;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.InvalidRegistryObjectException;
import org.eclipse.core.runtime.Platform;
public class CommandHandlerManager {
private Map<String, IPreviewerCommandHandler> handlers = null;
public void handle(String commandName, String projectName, Map<String, String[]> parameters) {
final IPreviewerCommandHandler commandHandler = getCommandMap().get(commandName);
if (commandHandler == null) {
PreviewerPlugin.log(MessageFormat.format("Command {0} is not handled", commandName), null);
} else {
commandHandler.handle(commandName, projectName, parameters);
}
}
private synchronized Map<String, IPreviewerCommandHandler> getCommandMap() {
if (handlers == null) {
handlers = new TreeMap<String, IPreviewerCommandHandler>();
IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(
PreviewerPlugin.PLUGIN_ID, "commands");
for (IConfigurationElement element : elements) {
final String name = element.getAttribute("name");
try {
handlers.put(name, (IPreviewerCommandHandler) element.createExecutableExtension("handler"));
} catch (InvalidRegistryObjectException e) {
PreviewerPlugin.log(MessageFormat.format("Command: {0}, handler: {1}", name, element
.getAttribute("handler")), e);
} catch (CoreException e) {
PreviewerPlugin.log(MessageFormat.format("Command: {0}, handler: {1}", name, element
.getAttribute("handler")), e);
}
}
}
return handlers;
}
}