content: /**
   * 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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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.atlas.impala.model;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Contain vertex info of this node and its children. It is used only internally
   */
  public class ImpalaNode {
      LineageVertex ownVertex;
      Map<Long, ImpalaNode> children;
  
      public ImpalaNode(LineageVertex ownVertex) {
          this.ownVertex = ownVertex;
          children = new HashMap<>();
      }
  
      public String getNodeName() {
          return ownVertex.getVertexId();
      }
  
      public ImpalaVertexType getNodeType() {
          return ownVertex.getVertexType();
      }
  
      public LineageVertex getOwnVertex() {
          return ownVertex;
      }
  
      public Map<Long, ImpalaNode> getChildren() {
          return children;
      }
  
      /**
       * Add child to this node
       * @param child
       * @return the node corresponding to the input child vertex
       */
      public ImpalaNode addChild(LineageVertex child) {
          ImpalaNode exitingChild = children.get(child.getId());
          if (exitingChild != null) {
              return exitingChild;
          }
  
          ImpalaNode newChild = new ImpalaNode(child);
          return children.put(child.getId(), newChild);
      }
  }
  