/*******************************************************************************
* Copyright (c) 2009 IBM Corporation 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:
* IBM Corporation - initial API and implementation
* Zend Technologies
*******************************************************************************/
package org.eclipse.php.internal.ui.actions.filters;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.php.internal.ui.PHPUIMessages;
import org.eclipse.php.internal.ui.PHPUiPlugin;
import org.eclipse.php.ui.actions.filters.IActionFilterContributor;
class ActionFilterContributorsRegistry {
private static final String EXTENSION_POINT = "actionFilterContributors"; //$NON-NLS-1$
private static final String CONTRIBUTOR_ELEMENT = "contributor"; //$NON-NLS-1$
private static final String ID_ATTRIBUTE = "id"; //$NON-NLS-1$
private static final String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
private static ActionFilterContributorsRegistry instance;
private Map<String, IConfigurationElement> contributorElements = new HashMap<>();
private ActionFilterContributorsRegistry() {
IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(PHPUiPlugin.ID,
EXTENSION_POINT);
for (int i = 0; i < elements.length; i++) {
IConfigurationElement element = elements[i];
if (element.getName().equals(CONTRIBUTOR_ELEMENT)) {
contributorElements.put(element.getAttribute(ID_ATTRIBUTE), element);
}
}
}
public synchronized static ActionFilterContributorsRegistry getInstance() {
if (instance == null) {
instance = new ActionFilterContributorsRegistry();
}
return instance;
}
/**
* Returns filter contributor by the specified ID
*
* @param id
* ID of the action filter contributor
* @return action filter contributor if it was found, otherwise
* <code>null</code>
*/
public IActionFilterContributor getContributor(String id) {
final IConfigurationElement element = (IConfigurationElement) contributorElements.get(id);
if (element != null) {
final IActionFilterContributor contributor[] = new IActionFilterContributor[1];
SafeRunner.run(new SafeRunnable(PHPUIMessages.ActionFilterContributorsRegistry_0 + EXTENSION_POINT) {
@Override
public void run() throws Exception {
contributor[0] = (IActionFilterContributor) element.createExecutableExtension(CLASS_ATTRIBUTE);
}
});
return contributor[0];
}
return null;
}
}