/*
    * 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.resolver.internal.ant.types;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.tools.ant.Task;
  import org.apache.tools.ant.types.DataType;
  import org.apache.tools.ant.types.Reference;
  
  /**
   */
  public class Artifacts extends DataType implements ArtifactContainer {
  
      private List<ArtifactContainer> containers = new ArrayList<>();
  
      protected Artifacts getRef() {
          return (Artifacts) getCheckedRef();
      }
  
      public void validate(Task task) {
          if (isReference()) {
              getRef().validate(task);
          } else {
              for (ArtifactContainer container : containers) {
                  container.validate(task);
              }
          }
      }
  
      public void setRefid(Reference ref) {
          if (!containers.isEmpty()) {
              throw noChildrenAllowed();
          }
          super.setRefid(ref);
      }
  
      public void addArtifact(Artifact artifact) {
          checkChildrenAllowed();
          containers.add(artifact);
      }
  
      public void addArtifacts(Artifacts artifacts) {
          checkChildrenAllowed();
          if (artifacts == this) {
              throw circularReference();
          }
          containers.add(artifacts);
      }
  
      public List<Artifact> getArtifacts() {
          if (isReference()) {
              return getRef().getArtifacts();
          }
          List<Artifact> artifacts = new ArrayList<>();
          for (ArtifactContainer container : containers) {
              artifacts.addAll(container.getArtifacts());
          }
          return artifacts;
      }
  }