/*
* Copyright 2000-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.vcs.log.graph.impl.facade;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.vcs.log.graph.api.LinearGraph;
import com.intellij.vcs.log.graph.api.elements.GraphEdge;
import com.intellij.vcs.log.graph.impl.facade.GraphChanges.EdgeImpl;
import org.jetbrains.annotations.NotNull;
import java.util.Collection;
import java.util.Collections;
import java.util.Set;
public class GraphChangesUtil {
public static final GraphChanges<Integer> SOME_CHANGES = new GraphChanges<Integer>() {
@NotNull
@Override
public Collection<Node<Integer>> getChangedNodes() {
return Collections.emptyList();
}
@NotNull
@Override
public Collection<Edge<Integer>> getChangedEdges() {
return Collections.emptyList();
}
};
public static EdgeImpl<Integer> edgeChanged(@NotNull GraphEdge edge, @NotNull LinearGraph graph, boolean removed) {
Integer up = null;
Integer down = null;
if (edge.getUpNodeIndex() != null) {
up = graph.getNodeId(edge.getUpNodeIndex());
}
if (edge.getDownNodeIndex() != null) {
down = graph.getNodeId(edge.getDownNodeIndex());
}
return new EdgeImpl<>(up, down, edge.getTargetId(), removed);
}
public static GraphChanges<Integer> edgesReplaced(Collection<GraphEdge> removedEdges,
Collection<GraphEdge> addedEdges,
LinearGraph delegateGraph) {
final Set<GraphChanges.Edge<Integer>> edgeChanges = ContainerUtil.newHashSet();
for (GraphEdge edge : removedEdges) {
edgeChanges.add(edgeChanged(edge, delegateGraph, true));
}
for (GraphEdge edge : addedEdges) {
edgeChanges.add(edgeChanged(edge, delegateGraph, false));
}
return new GraphChanges.GraphChangesImpl<>(Collections.<GraphChanges.Node<Integer>>emptySet(), edgeChanges);
}
}