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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.eclipse.aether.util.graph.transformer;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.Set;
import org.eclipse.aether.RepositoryException;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.collection.DependencyGraphTransformationContext;
import org.eclipse.aether.collection.DependencyGraphTransformer;
import org.eclipse.aether.graph.Dependency;
import org.eclipse.aether.graph.DependencyNode;
import static java.util.Objects.requireNonNull;
/**
* A dependency graph transformer that identifies conflicting dependencies. When this transformer has executed, the
* transformation context holds a {@code Map} where dependency nodes that belong to the same
* conflict group will have an equal conflict identifier. This map is stored using the key
* {@link TransformationContextKeys#CONFLICT_IDS}.
*/
public final class ConflictMarker implements DependencyGraphTransformer {
/**
* After the execution of this method, every DependencyNode with an attached dependency is member of one conflict
* group.
*
* @see DependencyGraphTransformer#transformGraph(DependencyNode, DependencyGraphTransformationContext)
*/
public DependencyNode transformGraph(DependencyNode node, DependencyGraphTransformationContext context)
throws RepositoryException {
requireNonNull(node, "node cannot be null");
requireNonNull(context, "context cannot be null");
@SuppressWarnings("unchecked")
Map stats = (Map) context.get(TransformationContextKeys.STATS);
long time1 = System.nanoTime();
Map nodes = new IdentityHashMap<>(1024);
Map