content: /*
   * Copyright 2022 Alibaba Group Holding Limited.
   *
   * 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.
   */
  
  package com.alibaba.graphscope.ds.adaptor;
  
  import com.alibaba.graphscope.ds.ProjectedNbr;
  import com.alibaba.graphscope.ds.Vertex;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class ProjectedNbrAdaptor<VID_T, EDATA_T> implements Nbr<VID_T, EDATA_T> {
      private static Logger logger = LoggerFactory.getLogger(ProjectedNbrAdaptor.class.getName());
  
      public static final String TYPE = "ProjectedNbr";
      private ProjectedNbr<VID_T, EDATA_T> nbr;
      private ProjectedAdjListAdaptor<VID_T, EDATA_T> adjListAdaptor;
  
      @Override
      public String type() {
          return TYPE;
      }
  
      public ProjectedNbrAdaptor(
              ProjectedNbr<VID_T, EDATA_T> n,
              ProjectedAdjListAdaptor<VID_T, EDATA_T> adjListAdaptor) {
          nbr = n;
          this.adjListAdaptor = adjListAdaptor;
      }
  
      @Override
      public Vertex<VID_T> neighbor() {
          return nbr.neighbor();
      }
  
      /** When try to get edata from here, we assume only ed=stringView is possible*/
      @Override
      public EDATA_T data() {
          return adjListAdaptor.getEdata(nbr.edgeId());
      }
  
      @Override
      public Nbr<VID_T, EDATA_T> inc() {
          nbr = nbr.inc();
          return this;
      }
  
      @Override
      public boolean eq(Nbr<VID_T, EDATA_T> rhs) {
          if (!(rhs instanceof ProjectedNbrAdaptor)) {
              logger.error("rhs:" + rhs + "not instance of ProjectedNbrAdaptor");
              return false;
          }
          return nbr.eq(((ProjectedNbrAdaptor<VID_T, EDATA_T>) rhs).nbr);
      }
  
      @Override
      public Nbr<VID_T, EDATA_T> dec() {
          nbr.dec();
          return this;
      }
  }
  