content: package act.cli.tree;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * Licensed 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.
   * #L%
   */
  
  import org.osgl.$;
  import org.osgl.util.C;
  import org.osgl.util.S;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * A simple mutable tree node implementation
   */
  public class SimpleTreeNode implements TreeNode {
  
      private String id;
      private String label;
      private List<TreeNode> children;
  
      public SimpleTreeNode() {
          this.children = new ArrayList<>();
      }
  
      public SimpleTreeNode(String id) {
          this(id, id);
      }
  
      public SimpleTreeNode(String id, String label) {
          this(id, label, C.<TreeNode>newList());
      }
  
      public SimpleTreeNode(String id, String label, List<TreeNode> children) {
          this.id = id;
          this.label = label;
          this.children = null == children ? C.<TreeNode>newList() : C.newList(children);
      }
  
      @Override
      public String id() {
          return id;
      }
  
      public SimpleTreeNode id(String id) {
          this.id = id;
          return this;
      }
  
      @Override
      public String label() {
          return null == label ? id : label;
      }
  
      public SimpleTreeNode label(String label) {
          this.label = label;
          return this;
      }
  
      @Override
      public List<TreeNode> children() {
          return C.list(children);
      }
  
      public SimpleTreeNode children(List<TreeNode> children) {
          this.children = C.newList(children);
          return this;
      }
  
      public SimpleTreeNode addChild(TreeNode child) {
          this.children.add(child);
          return this;
      }
  
      public SimpleTreeNode removeChild(TreeNode child) {
          this.children.remove(child);
          return this;
      }
  
      public SimpleTreeNode removeChild(final String id) {
          this.children.remove(new $.Predicate<TreeNode>() {
              @Override
              public boolean test(TreeNode treeNode) {
                  return S.eq(treeNode.id(), id);
              }
          });
          return this;
      }
  }
  