| /* |
| * 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.graph; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.IdentityHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| import org.apache.maven.execution.ProjectDependencyGraph; |
| import org.apache.maven.project.MavenProject; |
| |
| /** |
| * Provides a sub view of another dependency graph. |
| * |
| */ |
| class FilteredProjectDependencyGraph implements ProjectDependencyGraph { |
| |
| private ProjectDependencyGraph projectDependencyGraph; |
| |
| private Map<MavenProject, ?> whiteList; |
| |
| private List<MavenProject> sortedProjects; |
| |
| /** |
| * Creates a new project dependency graph from the specified graph. |
| * |
| * @param projectDependencyGraph The project dependency graph to create a sub view from, must not be {@code null}. |
| * @param whiteList The projects on which the dependency view should focus, must not be {@code null}. |
| */ |
| FilteredProjectDependencyGraph( |
| ProjectDependencyGraph projectDependencyGraph, Collection<? extends MavenProject> whiteList) { |
| this.projectDependencyGraph = |
| Objects.requireNonNull(projectDependencyGraph, "projectDependencyGraph cannot be null"); |
| |
| this.whiteList = new IdentityHashMap<>(); |
| |
| for (MavenProject project : whiteList) { |
| this.whiteList.put(project, null); |
| } |
| } |
| |
| /** |
| * @since 3.5.0 |
| */ |
| public List<MavenProject> getAllProjects() { |
| return this.projectDependencyGraph.getAllProjects(); |
| } |
| |
| public List<MavenProject> getSortedProjects() { |
| if (sortedProjects == null) { |
| sortedProjects = applyFilter(projectDependencyGraph.getSortedProjects()); |
| } |
| |
| return new ArrayList<>(sortedProjects); |
| } |
| |
| public List<MavenProject> getDownstreamProjects(MavenProject project, boolean transitive) { |
| return applyFilter(projectDependencyGraph.getDownstreamProjects(project, transitive)); |
| } |
| |
| public List<MavenProject> getUpstreamProjects(MavenProject project, boolean transitive) { |
| return applyFilter(projectDependencyGraph.getUpstreamProjects(project, transitive)); |
| } |
| |
| private List<MavenProject> applyFilter(Collection<? extends MavenProject> projects) { |
| List<MavenProject> filtered = new ArrayList<>(projects.size()); |
| |
| for (MavenProject project : projects) { |
| if (whiteList.containsKey(project)) { |
| filtered.add(project); |
| } |
| } |
| |
| return filtered; |
| } |
| |
| @Override |
| public String toString() { |
| return getSortedProjects().toString(); |
| } |
| } |