/*******************************************************************************
* Copyright (c) 2014 Google, 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:
* Sergey Prigogin (Google) - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.search;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.runtime.CoreException;
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.eclipse.osgi.util.NLS;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.ui.extensions.IExternalSearchProvider;
/**
* Maintains a list of extensions implementing the org.eclipse.cdt.ui.externalSearchProviders
* extension point.
*/
public class CSearchProviderManager {
private final String SEARCH_PROVIDERS = CUIPlugin.PLUGIN_ID + ".externalSearchProviders"; //$NON-NLS-1$
private final Object ELEMENT_PROVIDER = "provider"; //$NON-NLS-1$
private final String ATTRIBUTE_CLASS = "class"; //$NON-NLS-1$
private List<IExternalSearchProvider> externalSearchProviders;
public static CSearchProviderManager INSTANCE = new CSearchProviderManager();
private CSearchProviderManager() {}
public List<IExternalSearchProvider> getExternalSearchProviders() {
if (externalSearchProviders == null) {
externalSearchProviders = new ArrayList<IExternalSearchProvider>();
IExtensionRegistry registry = Platform.getExtensionRegistry();
IExtensionPoint indexProviderPoint = registry.getExtensionPoint(SEARCH_PROVIDERS);
for (IExtension extension : indexProviderPoint.getExtensions()) {
try {
for (IConfigurationElement element : extension.getConfigurationElements()) {
if (ELEMENT_PROVIDER.equals(element.getName())) {
Object provider = element.createExecutableExtension(ATTRIBUTE_CLASS);
if (provider instanceof IExternalSearchProvider) {
externalSearchProviders.add((IExternalSearchProvider) provider);
} else {
CUIPlugin.logError(NLS.bind(CSearchMessages.CSearchProviderManager_InvalidSearchProvider,
extension.getContributor().getName()));
}
}
}
} catch (CoreException e) {
CUIPlugin.log(e);
}
}
}
return externalSearchProviders;
}
}