| package org.apache.maven.project; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import org.apache.maven.model.Model; |
| |
| /** |
| * Holds all Models that are known to the reactor. This allows the project builder to resolve imported Models from the |
| * reactor when building another project's effective model. |
| * |
| * @author Benjamin Bentmann |
| * @author Robert Scholte |
| */ |
| class ReactorModelPool |
| { |
| private final Map<GAKey, Set<Model>> modelsByGa = new HashMap<>(); |
| |
| private final Map<Path, Model> modelsByPath = new HashMap<>(); |
| |
| /** |
| * Get the model by its GAV or (since 4.0.0) by its GA if there is only one. |
| * |
| * @param groupId never {@code null} |
| * @param artifactId never {@code null} |
| * @param version can be {@code null} |
| * @return the matching model or {@code null} |
| * @throws IllegalStateException if version was null and multiple modules share the same groupId + artifactId |
| */ |
| public Model get( String groupId, String artifactId, String version ) |
| { |
| return modelsByGa.getOrDefault( new GAKey( groupId, artifactId ), Collections.emptySet() ).stream() |
| .filter( m -> version == null || version.equals( getVersion( m ) ) ) |
| .reduce( ( a, b ) -> |
| { |
| throw new IllegalStateException( "Multiple modules with key " |
| + a.getGroupId() + ':' + a.getArtifactId() ); |
| } ).orElse( null ); |
| } |
| |
| /** |
| * Find model by path, useful when location the parent by relativePath |
| * |
| * @param path |
| * @return the matching model or {@code null} |
| * @since 4.0.0 |
| */ |
| public Model get( Path path ) |
| { |
| final Path pomFile; |
| if ( Files.isDirectory( path ) ) |
| { |
| pomFile = path.resolve( "pom.xml" ); |
| } |
| else |
| { |
| pomFile = path; |
| } |
| return modelsByPath.get( pomFile ); |
| } |
| |
| private String getVersion( Model model ) |
| { |
| String version = model.getVersion(); |
| if ( version == null && model.getParent() != null ) |
| { |
| version = model.getParent().getVersion(); |
| } |
| return version; |
| } |
| |
| static class Builder |
| { |
| private ReactorModelPool pool = new ReactorModelPool(); |
| |
| Builder put( Path pomFile, Model model ) |
| { |
| pool.modelsByPath.put( pomFile, model ); |
| pool.modelsByGa.computeIfAbsent( new GAKey( getGroupId( model ), model.getArtifactId() ), |
| k -> new HashSet<Model>() ).add( model ); |
| return this; |
| } |
| |
| ReactorModelPool build() |
| { |
| return pool; |
| } |
| |
| private static String getGroupId( Model model ) |
| { |
| String groupId = model.getGroupId(); |
| if ( groupId == null && model.getParent() != null ) |
| { |
| groupId = model.getParent().getGroupId(); |
| } |
| return groupId; |
| } |
| } |
| |
| private static final class GAKey |
| { |
| |
| private final String groupId; |
| |
| private final String artifactId; |
| |
| private final int hashCode; |
| |
| GAKey( String groupId, String artifactId ) |
| { |
| this.groupId = ( groupId != null ) ? groupId : ""; |
| this.artifactId = ( artifactId != null ) ? artifactId : ""; |
| |
| hashCode = Objects.hash( this.groupId, this.artifactId ); |
| } |
| |
| @Override |
| public boolean equals( Object obj ) |
| { |
| if ( this == obj ) |
| { |
| return true; |
| } |
| |
| GAKey that = (GAKey) obj; |
| |
| return artifactId.equals( that.artifactId ) && groupId.equals( that.groupId ); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return hashCode; |
| } |
| |
| @Override |
| public String toString() |
| { |
| StringBuilder buffer = new StringBuilder( 128 ); |
| buffer.append( groupId ).append( ':' ).append( artifactId ); |
| return buffer.toString(); |
| } |
| } |
| |
| } |