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/*****************************************************************************
* Copyright (c) 2014 CEA LIST.
*
* 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:
* CEA LIST - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.types.core.registries;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.emf.type.core.IElementMatcher;
import org.eclipse.papyrus.infra.types.AbstractMatcherConfiguration;
import org.eclipse.papyrus.infra.types.ElementTypesConfigurationsPackage;
import org.eclipse.papyrus.infra.types.core.Activator;
import org.eclipse.papyrus.infra.types.core.extensionpoints.IMatcherConfigurationKindExtensionPoint;
import org.eclipse.papyrus.infra.types.core.factories.IMatcherFactory;
import org.eclipse.papyrus.infra.types.core.factories.impl.DefaultMatcherFactory;
public class MatcherConfigurationTypeRegistry {
private volatile static MatcherConfigurationTypeRegistry registry;
protected Map<String, IMatcherFactory<? extends AbstractMatcherConfiguration>> matcherConfigurationTypeToFactory = null;
private MatcherConfigurationTypeRegistry() {
super();
}
public static synchronized MatcherConfigurationTypeRegistry getInstance() {
if (registry == null) {
registry = new MatcherConfigurationTypeRegistry();
registry.init();
}
return registry;
}
protected void init() {
matcherConfigurationTypeToFactory = new HashMap<String, IMatcherFactory<? extends AbstractMatcherConfiguration>>();
IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(IMatcherConfigurationKindExtensionPoint.EXTENSION_POINT_ID);
for (IConfigurationElement configurationElement : elements) {
String configurationClass = configurationElement.getAttribute(IMatcherConfigurationKindExtensionPoint.CONFIGURATION_CLASS);
try {
Object factoryClass = configurationElement.createExecutableExtension(IMatcherConfigurationKindExtensionPoint.FACTORY_CLASS);
if (factoryClass instanceof IMatcherFactory) {
matcherConfigurationTypeToFactory.put(configurationClass, (IMatcherFactory<?>) factoryClass);
}
} catch (CoreException e) {
Activator.log.error(e);
}
}
// Register default interpretation
matcherConfigurationTypeToFactory.put(ElementTypesConfigurationsPackage.eINSTANCE.getMatcherConfiguration().getInstanceTypeName(), new DefaultMatcherFactory());
}
protected <T extends AbstractMatcherConfiguration> IMatcherFactory<T> getFactory(T matcherConfiguration) {
String matcherConfigurationType = matcherConfiguration.eClass().getInstanceTypeName();
// We assume here that the right factory is registered for the right MatcherConfiguration
@SuppressWarnings("unchecked")
IMatcherFactory<T> factory = (IMatcherFactory<T>) matcherConfigurationTypeToFactory.get(matcherConfigurationType);
return factory;
}
public <T extends AbstractMatcherConfiguration> IElementMatcher getMatcher(T matcherConfiguration) {
if (matcherConfiguration == null) {
return null;
} else {
IMatcherFactory<T> factory = getFactory(matcherConfiguration);
if (factory == null) {
// Provide dummy interpretation
IElementMatcher matcher = new DummyElementMatcher();
return matcher;
} else {
IElementMatcher matcher = factory.createElementMatcher(matcherConfiguration);
return matcher;
}
}
}
public class DummyElementMatcher implements IElementMatcher {
/**
* @see org.eclipse.gmf.runtime.emf.type.core.IElementMatcher#matches(org.eclipse.emf.ecore.EObject)
*
* @param eObject
* @return
*/
@Override
public boolean matches(EObject eObject) {
return true;
}
}
}
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