| /* |
| * 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.apache.maven.internal.aether; |
| |
| import java.io.File; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| import org.apache.maven.model.Model; |
| import org.apache.maven.repository.internal.MavenWorkspaceReader; |
| import org.eclipse.aether.artifact.Artifact; |
| import org.eclipse.aether.repository.WorkspaceReader; |
| import org.eclipse.aether.repository.WorkspaceRepository; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| /** |
| * A maven workspace reader that delegates to a chain of other readers, effectively aggregating their contents. |
| */ |
| public class MavenChainedWorkspaceReader implements MavenWorkspaceReader { |
| |
| protected List<WorkspaceReader> readers; |
| protected WorkspaceRepository repository; |
| |
| /** |
| * Creates a new workspace reader by chaining the specified readers. |
| * |
| * @param readers The readers to chain must not be {@code null}. |
| */ |
| public MavenChainedWorkspaceReader(WorkspaceReader... readers) { |
| setReaders(Arrays.asList(readers)); |
| } |
| |
| @Override |
| public WorkspaceRepository getRepository() { |
| return this.repository; |
| } |
| |
| @Override |
| public Model findModel(Artifact artifact) { |
| requireNonNull(artifact, "artifact cannot be null"); |
| Model model = null; |
| |
| for (WorkspaceReader workspaceReader : readers) { |
| if (workspaceReader instanceof MavenWorkspaceReader) { |
| model = ((MavenWorkspaceReader) workspaceReader).findModel(artifact); |
| if (model != null) { |
| break; |
| } |
| } |
| } |
| |
| return model; |
| } |
| |
| @Override |
| public File findArtifact(Artifact artifact) { |
| requireNonNull(artifact, "artifact cannot be null"); |
| File file = null; |
| |
| for (WorkspaceReader reader : readers) { |
| file = reader.findArtifact(artifact); |
| if (file != null) { |
| break; |
| } |
| } |
| |
| return file; |
| } |
| |
| @Override |
| public List<String> findVersions(Artifact artifact) { |
| requireNonNull(artifact, "artifact cannot be null"); |
| Collection<String> versions = new LinkedHashSet<>(); |
| |
| for (WorkspaceReader reader : readers) { |
| versions.addAll(reader.findVersions(artifact)); |
| } |
| |
| return Collections.unmodifiableList(new ArrayList<>(versions)); |
| } |
| |
| public void setReaders(Collection<WorkspaceReader> readers) { |
| this.readers = Collections.unmodifiableList(new ArrayList<>(readers)); |
| Key key = new Key(this.readers); |
| this.repository = new WorkspaceRepository(key.getContentType(), key); |
| } |
| |
| public List<WorkspaceReader> getReaders() { |
| return readers; |
| } |
| |
| private static class Key { |
| private final List<Object> keys; |
| private final String type; |
| |
| Key(Collection<WorkspaceReader> readers) { |
| keys = readers.stream().map(r -> r.getRepository().getKey()).collect(Collectors.toList()); |
| type = readers.stream().map(r -> r.getRepository().getContentType()).collect(Collectors.joining("+")); |
| } |
| |
| public String getContentType() { |
| return type; |
| } |
| |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } else { |
| return obj != null && this.getClass().equals(obj.getClass()) && this.keys.equals(((Key) obj).keys); |
| } |
| } |
| |
| public int hashCode() { |
| return this.keys.hashCode(); |
| } |
| } |
| |
| /** |
| * chains a collection of {@link WorkspaceReader}s |
| * @param workspaceReaderCollection the collection of readers, might be empty but never <code>null</code> |
| * @return if the collection contains only one item returns the single item, otherwise creates a new |
| * {@link MavenChainedWorkspaceReader} chaining all readers in the order of the given collection. |
| */ |
| public static WorkspaceReader of(Collection<WorkspaceReader> workspaceReaderCollection) { |
| WorkspaceReader[] readers = workspaceReaderCollection.toArray(new WorkspaceReader[0]); |
| if (readers.length == 1) { |
| return readers[0]; |
| } |
| return new MavenChainedWorkspaceReader(readers); |
| } |
| } |