/******************************************************************************* * 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.runtime.persistence.internal; import java.util.ArrayList; import java.util.Collection; import java.util.List; import org.eclipse.tcf.te.runtime.extensions.AbstractExtensionPointManager; import org.eclipse.tcf.te.runtime.extensions.ExecutableExtensionProxy; import org.eclipse.tcf.te.runtime.persistence.interfaces.IVariableProvider; /** * VariableProviderExtensionPointManager */ public class VariableProviderExtensionPointManager extends AbstractExtensionPointManager<IVariableProvider> { /* * Thread save singleton instance creation. */ private static class LazyInstance { public static VariableProviderExtensionPointManager instance = new VariableProviderExtensionPointManager(); } /** * Constructor. */ VariableProviderExtensionPointManager() { super(); } /** * Returns the singleton instance of the extension point manager. */ public static VariableProviderExtensionPointManager getInstance() { return LazyInstance.instance; } /* (non-Javadoc) * @see org.eclipse.tcf.te.runtime.extensions.AbstractExtensionPointManager#getExtensionPointId() */ @Override protected String getExtensionPointId() { return "org.eclipse.tcf.te.runtime.persistence.variableProviders"; //$NON-NLS-1$ } /* (non-Javadoc) * @see org.eclipse.tcf.te.runtime.extensions.AbstractExtensionPointManager#getConfigurationElementName() */ @Override protected String getConfigurationElementName() { return "provider"; //$NON-NLS-1$ } /** * Returns all variable providers. * * @return The list of variable providers or an empty array. */ public IVariableProvider[] getProviders() { List<IVariableProvider> contributions = new ArrayList<IVariableProvider>(); Collection<ExecutableExtensionProxy<IVariableProvider>> delegates = getExtensions().values(); for (ExecutableExtensionProxy<IVariableProvider> delegate : delegates) { IVariableProvider instance = delegate.getInstance(); if (instance != null && !contributions.contains(instance)) { contributions.add(instance); } } return contributions.toArray(new IVariableProvider[contributions.size()]); } }