/*
    * 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.lifecycle.internal;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashSet;
  
  import org.apache.maven.execution.ProjectDependencyGraph;
  import org.apache.maven.lifecycle.internal.builder.BuilderCommon;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Contains status information that is global to an entire reactor build.
   *
   * @since 3.0
   * @author <a href="mailto:kristian.rosenvold@gmail.com">Kristian Rosenvold</a>
   */
  public class ReactorBuildStatus {
      private final ProjectDependencyGraph projectDependencyGraph;
  
      private final Collection<String> blackListedProjects = Collections.synchronizedSet(new HashSet<String>());
  
      private volatile boolean halted = false;
  
      public ReactorBuildStatus(ProjectDependencyGraph projectDependencyGraph) {
          this.projectDependencyGraph = projectDependencyGraph;
      }
  
      public boolean isBlackListed(MavenProject project) {
          return blackListedProjects.contains(BuilderCommon.getKey(project));
      }
  
      public void blackList(MavenProject project) {
          if (blackListedProjects.add(BuilderCommon.getKey(project)) && projectDependencyGraph != null) {
              for (MavenProject downstreamProject : projectDependencyGraph.getDownstreamProjects(project, true)) {
                  blackListedProjects.add(BuilderCommon.getKey(downstreamProject));
              }
          }
      }
  
      public void halt() {
          halted = true;
      }
  
      public boolean isHalted() {
          return halted;
      }
  
      public boolean isHaltedOrBlacklisted(MavenProject mavenProject) {
          return isBlackListed(mavenProject) || isHalted();
      }
  }