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/*****************************************************************************
* Copyright (c) 2013 CEA LIST 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
*****************************************************************************/
package org.eclipse.papyrus.uml.search.ui.query;
import java.util.List;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.papyrus.uml.search.ui.Activator;
import org.eclipse.papyrus.uml.search.ui.results.PapyrusSearchResult;
import org.eclipse.search.ui.ISearchResult;
import org.eclipse.search.ui.text.AbstractTextSearchResult;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
/**
* A composite query delegates execution to multiple nested queries and synthesizes their results.
*/
public class CompositePapyrusQuery extends AbstractPapyrusQuery {
private final List<? extends AbstractPapyrusQuery> queries;
protected CompositePapyrusQuery(List<? extends AbstractPapyrusQuery> queries) {
this.queries = queries;
}
/**
* Creates the most efficient composition of zero or more {@code queries}.
*
* @param queries
* zero or more queries to delegate to
*
* @return a composition of the {@code queries}
*/
public static AbstractPapyrusQuery compose(Iterable<? extends AbstractPapyrusQuery> queries) {
switch(Iterables.size(queries)) {
case 0:
return AbstractPapyrusQuery.Empty.INSTANCE;
case 1:
return Iterables.getOnlyElement(queries);
default:
return new CompositePapyrusQuery(ImmutableList.copyOf(queries));
}
}
public String getLabel() {
return queries.get(0).getLabel();
}
@Override
public String getSearchQueryText() {
return queries.get(0).getSearchQueryText();
}
public boolean canRerun() {
boolean result = true;
for(AbstractPapyrusQuery next : queries) {
if(!next.canRerun()) {
result = false;
break;
}
}
return result;
}
public boolean canRunInBackground() {
boolean result = true;
for(AbstractPapyrusQuery next : queries) {
if(!next.canRunInBackground()) {
result = false;
break;
}
}
return result;
}
public IStatus run(IProgressMonitor monitor) throws OperationCanceledException {
List<IStatus> result = new java.util.ArrayList<IStatus>(queries.size());
SubMonitor sub = SubMonitor.convert(monitor, result.size());
for(AbstractPapyrusQuery next : queries) {
IStatus status = next.run(sub.newChild(1));
if(!status.isOK()) {
result.add(status);
}
}
return result.isEmpty() ? Status.OK_STATUS : (result.size() == 1) ? result.get(0) : new MultiStatus(Activator.PLUGIN_ID, 0, result.toArray(new IStatus[result.size()]), "Problems occurred in search.", null);
}
public ISearchResult getSearchResult() {
PapyrusSearchResult result = new PapyrusSearchResult(this);
for(AbstractPapyrusQuery next : queries) {
AbstractTextSearchResult nextResult = (AbstractTextSearchResult)next.getSearchResult();
Object[] elements = nextResult.getElements();
for(int i = 0; i < elements.length; i++) {
result.addMatches(nextResult.getMatches(elements[i]));
}
}
return result;
}
}
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