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/*******************************************************************************
* Copyright (c) 2013 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.orcs.core.internal.relation.impl;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import org.eclipse.osee.framework.core.enums.LoadLevel;
import org.eclipse.osee.framework.core.enums.RelationSide;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.orcs.OrcsSession;
import org.eclipse.osee.orcs.core.internal.graph.GraphData;
import org.eclipse.osee.orcs.core.internal.relation.Relation;
import org.eclipse.osee.orcs.core.internal.relation.RelationNode;
import org.eclipse.osee.orcs.core.internal.relation.RelationNodeLoader;
import org.eclipse.osee.orcs.core.internal.relation.RelationResolver;
import com.google.common.collect.Lists;
/**
* @author Roberto E. Escobar
*/
public class RelationResolverImpl implements RelationResolver {
private final RelationNodeLoader loader;
public RelationResolverImpl(RelationNodeLoader loader) {
super();
this.loader = loader;
}
@SuppressWarnings("unchecked")
@Override
public <T extends RelationNode> List<T> resolve(OrcsSession session, GraphData graph, List<Relation> links, RelationSide... sides) throws OseeCoreException {
List<T> toReturn = Collections.emptyList();
if (!links.isEmpty()) {
Set<Integer> toLoad = null;
LinkedHashMap<Integer, T> items = new LinkedHashMap<>();
for (Relation relation : links) {
for (RelationSide side : sides) {
int localId = relation.getLocalIdForSide(side);
RelationNode node = graph.getNode(localId);
if (node == null) {
if (toLoad == null) {
toLoad = new LinkedHashSet<>();
}
toLoad.add(localId);
}
items.put(localId, (T) node);
}
}
if (toLoad != null && !toLoad.isEmpty()) {
Iterable<T> result = loader.loadNodes(session, graph, toLoad, LoadLevel.ALL);
for (T item : result) {
items.put(item.getLocalId(), item);
}
}
toReturn = toList(items.values());
}
return toReturn;
}
private <T> List<T> toList(Collection<T> values) {
List<T> list;
if (values instanceof ArrayList) {
list = (ArrayList<T>) values;
} else if (values instanceof LinkedList) {
list = (LinkedList<T>) values;
} else if (values == null) {
list = Collections.emptyList();
} else {
list = Lists.newLinkedList(values);
}
return list;
}
@Override
public void resolve(OrcsSession session, GraphData graph, RelationNode node) throws OseeCoreException {
loader.loadNodes(session, graph, Collections.singleton(node.getLocalId()), LoadLevel.RELATION_DATA);
}
}
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