content: package act.inject.param;
  
  /*-
   * #%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 act.cli.tree.TreeNode;
  import act.cli.view.CliView;
  
  import java.util.*;
  
  class ParamTreeNode implements TreeNode {
  
      private ParamKey key;
  
      private String leafVal;
      private Map<String, ParamTreeNode> map;
      private List<ParamTreeNode> list;
  
      private ParamTreeNode(ParamKey path) {
          this.key = path;
      }
  
      @Override
      public String id() {
          return key.toString();
      }
  
      @Override
      public String label() {
          return id();
      }
  
      @Override
      public List<TreeNode> children() {
          List<TreeNode> list = new ArrayList<TreeNode>();
          if (isList()) {
              list.addAll(this.list);
          } else if (isMap()) {
              list.addAll(map.values());
          }
          return list;
      }
  
      @Override
      public String toString() {
          return id();
      }
  
      String debug() {
          return CliView.TREE.render(this, null, null);
      }
  
      ParamKey key() {
          return key;
      }
  
      boolean isLeaf() {
          return null != leafVal;
      }
  
      String value() {
          return leafVal;
      }
  
      boolean isMap() {
          return null != map;
      }
  
      Set<String> mapKeys() {
          return map.keySet();
      }
  
      Collection<ParamTreeNode> mapValues() {
          return map.values();
      }
  
      ParamTreeNode child(String name) {
          return map.get(name);
      }
  
      boolean isList() {
          return null != list;
      }
  
      List<ParamTreeNode> list() {
          return list;
      }
  
      void addListItem(ParamTreeNode item) {
          list.add(item);
      }
  
      void addChild(String key, ParamTreeNode child) {
          map.put(key, child);
      }
  
      static ParamTreeNode leaf(ParamKey key, String value) {
          ParamTreeNode node = new ParamTreeNode(key);
          node.leafVal = value;
          return node;
      }
  
      static ParamTreeNode map(ParamKey key) {
          ParamTreeNode node = new ParamTreeNode(key);
          node.map = new HashMap<>();
          return node;
      }
  
      static ParamTreeNode list(ParamKey key) {
          ParamTreeNode node = new ParamTreeNode(key);
          node.list = new ArrayList<>();
          return node;
      }
  
  }
  