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/*****************************************************************************
* Copyright (c) 2014, 2015 CEA LIST, Christian W. Damus, 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:
* CEA LIST - Initial API and implementation
* Christian W. Damus - bug 459174
*
*****************************************************************************/
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.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.gmf.runtime.emf.type.core.IAdviceBindingDescriptor;
import org.eclipse.papyrus.infra.types.AdviceConfiguration;
import org.eclipse.papyrus.infra.types.ElementTypesConfigurationsPackage;
import org.eclipse.papyrus.infra.types.core.Activator;
import org.eclipse.papyrus.infra.types.core.IConfiguredEditHelperAdviceDescriptor;
import org.eclipse.papyrus.infra.types.core.extensionpoints.IAdviceKindExtensionPoint;
import org.eclipse.papyrus.infra.types.core.factories.IEditHelperAdviceFactory;
import org.eclipse.papyrus.infra.types.core.factories.impl.DefaultAdviceBindingFactory;
import org.eclipse.papyrus.infra.types.core.factories.impl.DefaultEditHelperAdviceFactory;
public class AdviceConfigurationTypeRegistry {
private volatile static AdviceConfigurationTypeRegistry registry;
protected Map<String, IEditHelperAdviceFactory<? extends AdviceConfiguration>> adviceConfigurationTypeToFactory = null;
private AdviceConfigurationTypeRegistry() {
super();
}
/**
* returns the singleton instance of this registry
*
* @return the singleton instance of this registry
*/
public static synchronized AdviceConfigurationTypeRegistry getInstance() {
if (registry == null) {
registry = new AdviceConfigurationTypeRegistry();
registry.init();
}
return registry;
}
/**
* Inits the registry.
*/
protected void init() {
adviceConfigurationTypeToFactory = new HashMap<String, IEditHelperAdviceFactory<? extends AdviceConfiguration>>();
IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(IAdviceKindExtensionPoint.EXTENSION_POINT_ID);
for (IConfigurationElement configurationElement : elements) {
String configurationClass = configurationElement.getAttribute(IAdviceKindExtensionPoint.CONFIGURATION_CLASS);
try {
Object factoryClass = configurationElement.createExecutableExtension(IAdviceKindExtensionPoint.FACTORY_CLASS);
if (factoryClass instanceof IEditHelperAdviceFactory) {
adviceConfigurationTypeToFactory.put(configurationClass, (IEditHelperAdviceFactory<?>) factoryClass);
}
} catch (CoreException e) {
Activator.log.error(e);
}
}
// Register default interpretations
adviceConfigurationTypeToFactory.put(ElementTypesConfigurationsPackage.eINSTANCE.getEditHelperAdviceConfiguration().getInstanceTypeName(), new DefaultEditHelperAdviceFactory());
adviceConfigurationTypeToFactory.put(ElementTypesConfigurationsPackage.eINSTANCE.getAdviceBindingConfiguration().getInstanceTypeName(), new DefaultAdviceBindingFactory());
adviceConfigurationTypeToFactory.put(ElementTypesConfigurationsPackage.eINSTANCE.getExternallyRegisteredAdvice().getInstanceTypeName(), new DefaultAdviceBindingFactory());
}
public <T extends AdviceConfiguration> IEditHelperAdviceFactory<T> getFactory(AdviceConfiguration adviceConfiguration) {
String adviceConfigurationType = adviceConfiguration.eClass().getInstanceTypeName();
// We assume here that the right factory is registered for the right AdviceConfiguration
@SuppressWarnings("unchecked")
IEditHelperAdviceFactory<T> factory = (IEditHelperAdviceFactory<T>) adviceConfigurationTypeToFactory.get(adviceConfigurationType);
return factory;
}
public <T extends AdviceConfiguration> IAdviceBindingDescriptor getEditHelperAdviceDecriptor(T adviceConfiguration) {
IAdviceBindingDescriptor result = null;
if (adviceConfiguration != null) {
AdviceDescriptorAdapter adapter = AdviceDescriptorAdapter.get(adviceConfiguration);
if (adapter == null) {
IEditHelperAdviceFactory<T> factory = getFactory(adviceConfiguration);
if (factory != null) {
IConfiguredEditHelperAdviceDescriptor<T> editHelperAdvice = factory.createEditHelperAdviceDescriptor(adviceConfiguration);
editHelperAdvice.init(adviceConfiguration);
adapter = new AdviceDescriptorAdapter(editHelperAdvice);
adviceConfiguration.eAdapters().add(adapter);
}
}
if (adapter != null) {
result = adapter.getAdviceDescriptor();
}
}
return result;
}
//
// Nested types
//
private static class AdviceDescriptorAdapter extends AdapterImpl {
private final IAdviceBindingDescriptor adviceDescriptor;
AdviceDescriptorAdapter(IAdviceBindingDescriptor adviceDescriptor) {
super();
this.adviceDescriptor = adviceDescriptor;
}
@Override
public boolean isAdapterForType(Object type) {
return type == IAdviceBindingDescriptor.class;
}
public IAdviceBindingDescriptor getAdviceDescriptor() {
return adviceDescriptor;
}
static AdviceDescriptorAdapter get(AdviceConfiguration configuration) {
return (AdviceDescriptorAdapter) EcoreUtil.getExistingAdapter(configuration, IAdviceBindingDescriptor.class);
}
}
}
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