| package org.apache.maven.graph; |
| |
| /* |
| * 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.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import org.apache.maven.execution.ProjectDependencyGraph; |
| import org.apache.maven.project.DuplicateProjectException; |
| import org.apache.maven.project.MavenProject; |
| import org.apache.maven.project.ProjectSorter; |
| import org.codehaus.plexus.util.dag.CycleDetectedException; |
| |
| /** |
| * Describes the inter-dependencies between projects in the reactor. |
| * |
| * @author Benjamin Bentmann |
| */ |
| public class DefaultProjectDependencyGraph |
| implements ProjectDependencyGraph |
| { |
| |
| private final ProjectSorter sorter; |
| |
| private final List<MavenProject> allProjects; |
| |
| private final Map<MavenProject, Integer> order; |
| |
| private final Map<String, MavenProject> projects; |
| |
| /** |
| * Creates a new project dependency graph based on the specified projects. |
| * |
| * @param projects The projects to create the dependency graph with |
| * @throws DuplicateProjectException |
| * @throws CycleDetectedException |
| */ |
| public DefaultProjectDependencyGraph( Collection<MavenProject> projects ) |
| throws CycleDetectedException, DuplicateProjectException |
| { |
| this( projects, projects ); |
| } |
| |
| /** |
| * Creates a new project dependency graph based on the specified projects. |
| * |
| * @param allProjects All collected projects. |
| * @param projects The projects to create the dependency graph with. |
| * @throws DuplicateProjectException |
| * @throws CycleDetectedException |
| * @since 3.5.0 |
| */ |
| public DefaultProjectDependencyGraph( Collection<MavenProject> allProjects, |
| Collection<MavenProject> projects ) |
| throws CycleDetectedException, DuplicateProjectException |
| { |
| this.allProjects = Collections.unmodifiableList( new ArrayList<>( allProjects ) ); |
| this.sorter = new ProjectSorter( projects ); |
| this.order = new HashMap<>(); |
| this.projects = new HashMap<>(); |
| List<MavenProject> sorted = this.sorter.getSortedProjects(); |
| for ( int index = 0; index < sorted.size(); index++ ) |
| { |
| MavenProject project = sorted.get( index ); |
| String id = ProjectSorter.getId( project ); |
| this.projects.put( id, project ); |
| this.order.put( project, index ); |
| } |
| } |
| |
| /** |
| * @since 3.5.0 |
| */ |
| public List<MavenProject> getAllProjects() |
| { |
| return this.allProjects; |
| } |
| |
| public List<MavenProject> getSortedProjects() |
| { |
| return new ArrayList<>( sorter.getSortedProjects() ); |
| } |
| |
| public List<MavenProject> getDownstreamProjects( MavenProject project, boolean transitive ) |
| { |
| Objects.requireNonNull( project, "project cannot be null" ); |
| |
| Set<String> projectIds = new HashSet<>(); |
| |
| getDownstreamProjects( ProjectSorter.getId( project ), projectIds, transitive ); |
| |
| return getSortedProjects( projectIds ); |
| } |
| |
| private void getDownstreamProjects( String projectId, Set<String> projectIds, boolean transitive ) |
| { |
| for ( String id : sorter.getDependents( projectId ) ) |
| { |
| if ( projectIds.add( id ) && transitive ) |
| { |
| getDownstreamProjects( id, projectIds, transitive ); |
| } |
| } |
| } |
| |
| public List<MavenProject> getUpstreamProjects( MavenProject project, boolean transitive ) |
| { |
| Objects.requireNonNull( project, "project cannot be null" ); |
| |
| Set<String> projectIds = new HashSet<>(); |
| |
| getUpstreamProjects( ProjectSorter.getId( project ), projectIds, transitive ); |
| |
| return getSortedProjects( projectIds ); |
| } |
| |
| private void getUpstreamProjects( String projectId, Collection<String> projectIds, boolean transitive ) |
| { |
| for ( String id : sorter.getDependencies( projectId ) ) |
| { |
| if ( projectIds.add( id ) && transitive ) |
| { |
| getUpstreamProjects( id, projectIds, transitive ); |
| } |
| } |
| } |
| |
| private List<MavenProject> getSortedProjects( Set<String> projectIds ) |
| { |
| return projectIds.stream() |
| .map( id -> projects.get( id ) ) |
| .sorted( Comparator.comparingInt( order::get ) ) |
| .collect( Collectors.toList() ); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return sorter.getSortedProjects().toString(); |
| } |
| |
| } |