org.eclipse.aether.util.graph.transformer.ChainedDependencyGraphTransformer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of spring-cloud-contract-shade Show documentation
Show all versions of spring-cloud-contract-shade Show documentation
Spring Cloud Contract Shaded Dependencies
/*
* 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 org.eclipse.aether.RepositoryException;
import org.eclipse.aether.collection.DependencyGraphTransformationContext;
import org.eclipse.aether.collection.DependencyGraphTransformer;
import org.eclipse.aether.graph.DependencyNode;
import static java.util.Objects.requireNonNull;
/**
* A dependency graph transformer that chains other transformers.
*/
public final class ChainedDependencyGraphTransformer implements DependencyGraphTransformer {
private final DependencyGraphTransformer[] transformers;
/**
* Creates a new transformer that chains the specified transformers.
*
* @param transformers The transformers to chain, may be {@code null} or empty.
*/
public ChainedDependencyGraphTransformer(DependencyGraphTransformer... transformers) {
if (transformers == null) {
this.transformers = new DependencyGraphTransformer[0];
} else {
this.transformers = transformers;
}
}
/**
* Creates a new transformer that chains the specified transformers or simply returns one of them if the other one
* is {@code null}.
*
* @param transformer1 The first transformer of the chain, may be {@code null}.
* @param transformer2 The second transformer of the chain, may be {@code null}.
* @return The chained transformer or {@code null} if both input transformers are {@code null}.
*/
public static DependencyGraphTransformer newInstance(
DependencyGraphTransformer transformer1, DependencyGraphTransformer transformer2) {
if (transformer1 == null) {
return transformer2;
} else if (transformer2 == null) {
return transformer1;
}
return new ChainedDependencyGraphTransformer(transformer1, transformer2);
}
public DependencyNode transformGraph(DependencyNode node, DependencyGraphTransformationContext context)
throws RepositoryException {
requireNonNull(node, "node cannot be null");
requireNonNull(context, "context cannot be null");
for (DependencyGraphTransformer transformer : transformers) {
node = transformer.transformGraph(node, context);
}
return node;
}
}