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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.manager;
import org.eclipse.aether.collection.DependencyCollectionContext;
import org.eclipse.aether.collection.DependencyManagement;
import org.eclipse.aether.collection.DependencyManager;
import org.eclipse.aether.graph.Dependency;
import static java.util.Objects.requireNonNull;
/**
* A dependency manager that does not do any dependency management.
*/
public final class NoopDependencyManager implements DependencyManager {
/**
* A ready-made instance of this dependency manager which can safely be reused throughout an entire application
* regardless of multi-threading.
*/
public static final DependencyManager INSTANCE = new NoopDependencyManager();
/**
* Creates a new instance of this dependency manager. Usually, {@link #INSTANCE} should be used instead.
*/
public NoopDependencyManager() {}
public DependencyManager deriveChildManager(DependencyCollectionContext context) {
requireNonNull(context, "context cannot be null");
return this;
}
public DependencyManagement manageDependency(Dependency dependency) {
requireNonNull(dependency, "dependency cannot be null");
return null;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (null == obj || !getClass().equals(obj.getClass())) {
return false;
}
return true;
}
@Override
public int hashCode() {
return getClass().hashCode();
}
}