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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* 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:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.ui.skynet.widgets.xchange;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.logging.Level;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.logging.OseeLog;
import org.eclipse.osee.framework.skynet.core.artifact.Artifact;
import org.eclipse.osee.framework.ui.skynet.internal.Activator;
/**
* @author Jeff C. Phillips
*/
public class DefaultHierarchySorter implements Comparator<Artifact> {
private List<Artifact> populateParent(Artifact artifact, List<Artifact> parentList) throws OseeCoreException {
if (artifact != null) {
parentList.add(artifact);
parentList = populateParent(artifact.getParent(), parentList);
}
return parentList;
}
@Override
public int compare(Artifact firstArtifact, Artifact secondArtifact) {
List<Artifact> firstArtifactsParentList = new ArrayList<Artifact>();
List<Artifact> secondArtifactParentList = new ArrayList<Artifact>();
try {
firstArtifactsParentList = populateParent(firstArtifact, firstArtifactsParentList);
secondArtifactParentList = populateParent(secondArtifact, secondArtifactParentList);
Artifact commonParent = getCommonParent(firstArtifactsParentList, secondArtifactParentList);
if (commonParent != null) {
if (commonParent.equals(firstArtifact)) {
return -1;
} else if (commonParent.equals(secondArtifact)) {
return 1;
}
for (Artifact possibleChild : commonParent.getChildren()) {
int firstIndex = firstArtifactsParentList.indexOf(commonParent);
if (firstIndex > 0) {
firstArtifact = firstArtifactsParentList.get(firstIndex - 1);
}
int secondIndex = secondArtifactParentList.indexOf(commonParent);
if (secondIndex > 0) {
secondArtifact = secondArtifactParentList.get(secondIndex - 1);
}
if (possibleChild.equals(firstArtifact)) {
return -1;
} else if (possibleChild.equals(secondArtifact)) {
return 1;
}
}
}
} catch (OseeCoreException ex) {
OseeLog.log(Activator.class, Level.SEVERE, ex);
}
return 0;
}
/**
* @return Returns the common parent for both lists.
*/
private Artifact getCommonParent(List<Artifact> firstArtifactsParentList, List<Artifact> secondArtifactParentList) {
Artifact toReturn = null;
for (Artifact commonParent : firstArtifactsParentList) {
if (secondArtifactParentList.contains(commonParent)) {
toReturn = commonParent;
break;
}
}
return toReturn;
}
}
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