org.eclipse.aether.util.graph.traverser.StaticDependencyTraverser Maven / Gradle / Ivy
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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.traverser;
import org.eclipse.aether.collection.DependencyCollectionContext;
import org.eclipse.aether.collection.DependencyTraverser;
import org.eclipse.aether.graph.Dependency;
import static java.util.Objects.requireNonNull;
/**
* A dependency traverser which always or never traverses children.
*/
public final class StaticDependencyTraverser implements DependencyTraverser {
private final boolean traverse;
/**
* Creates a new traverser with the specified traversal behavior.
*
* @param traverse {@code true} to traverse all dependencies, {@code false} to never traverse.
*/
public StaticDependencyTraverser(boolean traverse) {
this.traverse = traverse;
}
public boolean traverseDependency(Dependency dependency) {
requireNonNull(dependency, "dependency cannot be null");
return traverse;
}
public DependencyTraverser deriveChildTraverser(DependencyCollectionContext context) {
requireNonNull(context, "context cannot be null");
return this;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (null == obj || !getClass().equals(obj.getClass())) {
return false;
}
StaticDependencyTraverser that = (StaticDependencyTraverser) obj;
return traverse == that.traverse;
}
@Override
public int hashCode() {
int hash = getClass().hashCode();
hash = hash * 31 + (traverse ? 1 : 0);
return hash;
}
}