/*******************************************************************************
* Copyright (c) 2012 Google, Inc.
* 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:
* Google, Inc. - initial API and implementation
*******************************************************************************/
package com.windowtester.runtime.swt.internal.identifier;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.osgi.framework.Bundle;
import com.windowtester.internal.debug.Logger;
import com.windowtester.runtime.locator.ILocator;
import com.windowtester.runtime.swt.internal.RuntimePlugin;
/**
* A manager for contributed control actions.
*/
public class ContributedIdentifierManager {
private static final IExtension[] NO_EXTENSIONS = new IExtension[]{};
private static final String CLASS_TAG = "class";
private static final String CONTROLLER_ACTION_EXTENSION_POINT = "widgetIdentifierDelegate";
private static final ContributedIdentifierManager INSTANCE = new ContributedIdentifierManager();
private IWidgetIdentifierDelegate[] _delegates;
public static ContributedIdentifierManager getInstance() {
return INSTANCE;
}
/**
* Answer the extensions for the <code>widgetIdentifierDelegate</code> extension point
*
* @return the extensions (not <code>null</code>, contains no <code>null</code>s)
*/
public IExtension[] getExtensions() {
IExtensionRegistry registry = Platform.getExtensionRegistry();
if (registry == null)
return NO_EXTENSIONS;
IExtensionPoint extensionPoint = registry.getExtensionPoint(RuntimePlugin.PLUGIN_ID, CONTROLLER_ACTION_EXTENSION_POINT);
if (extensionPoint == null)
return NO_EXTENSIONS;
return extensionPoint.getExtensions();
}
public IWidgetIdentifierDelegate[] getContributedIdentifiers() {
if (_delegates == null)
_delegates = doGetIdentifiers();
return _delegates;
}
private IWidgetIdentifierDelegate[] doGetIdentifiers() {
IExtension[] allExtensions = getExtensions();
List actions = new ArrayList();
for (int i = 0; i < allExtensions.length; i++) {
IExtension extension = allExtensions[i];
IConfigurationElement[] allElements = extension.getConfigurationElements();
for (int j = 0; j < allElements.length; j++) {
IConfigurationElement element = allElements[j];
if (element.getName().equals(CONTROLLER_ACTION_EXTENSION_POINT)) {
try {
String clsName = element.getAttribute(CLASS_TAG);
//pre 3.2: String namespace = extension.getNamespace();
String namespace = extension.getContributor().getName();
Bundle bundle = Platform.getBundle(namespace);
Class cls = bundle.loadClass(clsName);
IWidgetIdentifierDelegate action = (IWidgetIdentifierDelegate)cls.newInstance();
actions.add(action);
} catch (Exception e) {
Logger.log("An error occured configured contributed controller actions", e);
}
}
}
}
return (IWidgetIdentifierDelegate[])actions.toArray(new IWidgetIdentifierDelegate[]{});
}
public static ILocator identify(Object widget) {
IWidgetIdentifierDelegate[] id = getInstance().getContributedIdentifiers();
ILocator locator = null;
for (int i = 0; locator == null && i < id.length; i++) {
locator = id[i].identify(widget);
}
return locator;
}
}