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/*
* Copyright (c) 2014 CEA 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:
* Christian W. Damus (CEA) - Initial API and implementation
*
*/
package org.eclipse.papyrus.infra.ui.editor.reload;
import java.util.Collection;
import java.util.Collections;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.papyrus.infra.core.utils.AdapterUtils;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
/**
* An {@linkplain EditorReloadEvent#putContext(Object) editor reload context} that composes other reload contexts.
* This should be used whenever a {@linkplain IReloadContextProvider reload context provider} supplies multiple
* reload contexts, to ensure that they are properly initialized by the reload system.
*
* @since 1.2
*/
public class CompositeReloadContext implements IDisposableReloadContext, IAdaptable {
private final Collection<Object> reloadContexts;
public CompositeReloadContext() {
this(Collections.EMPTY_LIST);
}
public CompositeReloadContext(Iterable<?> reloadContexts) {
super();
this.reloadContexts = Lists.newArrayList(reloadContexts);
}
public <T> T add(T reloadContext) {
reloadContexts.add(reloadContext);
return reloadContext;
}
public Iterable<?> getReloadContexts() {
return Collections.unmodifiableCollection(reloadContexts);
}
public <T> Iterable<T> getReloadContexts(Class<T> type) {
return Iterables.filter(getReloadContexts(), type);
}
@Override
public void dispose() {
for (Object next : reloadContexts) {
if (next instanceof IDisposableReloadContext) {
((IDisposableReloadContext) next).dispose();
}
}
reloadContexts.clear();
}
@Override
public Object getAdapter(@SuppressWarnings("rawtypes") Class adapter) {
return (adapter == IInternalEMFSelectionContext.class) ? getEMFContext() : null;
}
private IInternalEMFSelectionContext getEMFContext() {
IInternalEMFSelectionContext result = null;
for (Object next : reloadContexts) {
if (AdapterUtils.adapt(next, IInternalEMFSelectionContext.class, null) != null) {
// We need the adapter
result = new IInternalEMFSelectionContext.Composite(this);
break;
}
}
return result;
}
}
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