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/**
* Copyright (c) 2012 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:
* Gregoire Dupe (Mia-Software) - Bug 375087 - [Table] ITableWidget.addColumn(List<ETypedElement>, List<FacetSet>)
* Gregoire Dupe (Mia-Software) - Bug 372626 - Aggregates
*/
package org.eclipse.papyrus.emf.facet.efacet.core.internal;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.papyrus.emf.facet.efacet.core.internal.exported.IResolver;
import org.eclipse.papyrus.emf.facet.efacet.core.internal.exported.IResolverManager;
import org.eclipse.papyrus.emf.facet.util.core.Logger;
public class ResolverManager implements IResolverManager {
private static final String ATT_NAME = "class"; //$NON-NLS-1$
private static final String EXT_POINT_ID = "org.eclipse.papyrus.emf.facet.efacet.core.internal.resolver"; //$NON-NLS-1$
private final List<IResolver> resolvers = new ArrayList<IResolver>();
public ResolverManager() {
final IConfigurationElement[] configs = Platform.getExtensionRegistry()
.getConfigurationElementsFor(ResolverManager.EXT_POINT_ID);
for (IConfigurationElement config : configs) {
try {
final Object object = config
.createExecutableExtension(ResolverManager.ATT_NAME);
if (object instanceof IResolver) {
final IResolver resolver = (IResolver) object;
this.resolvers.add(resolver);
}
} catch (CoreException e) {
Logger.logError(e, Activator.getDefault());
}
}
}
public <T> T resolve(final Object object, final Class<T> aClass) {
T result = null;
for (IResolver resolver : this.resolvers) {
if (resolver.canHandle(object)) {
try {
result = resolver.resolve(object, aClass);
} catch (ClassCastException e) {
Logger.logWarning(e, Activator.getDefault());
// Nothing to: we will try with an other resolver or return
// null
}
if (result != null) {
break;
}
}
}
return result;
}
public <T> List<T> selectionPropagation(final Object selectedObject,
final Class<T> aClass) {
@SuppressWarnings("unchecked")
// @SuppressWarnings("unchecked") The untyped list is an definitely
// empty list.
List<T> result = Collections.EMPTY_LIST;
for (IResolver resolver : this.resolvers) {
if (resolver.canHandle(selectedObject)) {
try {
result = resolver.selectionPropagation(selectedObject,
aClass);
} catch (ClassCastException e) {
Logger.logWarning(e, Activator.getDefault());
// Nothing to: we will try with an other resolver or return
// null
}
if (result != null) {
break;
}
}
}
return result;
}
public <T> T selectionRoot(final Object selectedObject,
final Class<T> aClass) {
T result = null;
for (IResolver resolver : this.resolvers) {
if (resolver.canHandle(selectedObject)) {
try {
result = resolver.selectionRoot(selectedObject,
aClass);
} catch (ClassCastException e) {
Logger.logWarning(e, Activator.getDefault());
// Nothing to: we will try with an other resolver or return
// null
}
if (result != null) {
break;
}
}
}
return result;
}
}
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