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.repository.store.graph.v2;
  
  import org.apache.atlas.model.instance.AtlasEntity;
  import org.apache.atlas.model.instance.AtlasEntity.AtlasEntitiesWithExtInfo;
  import org.apache.atlas.model.instance.AtlasEntity.AtlasEntityWithExtInfo;
  
  import java.util.Iterator;
  import java.util.List;
  
  public class AtlasEntityStream implements EntityStream {
      protected final AtlasEntitiesWithExtInfo entitiesWithExtInfo;
      protected final EntityStream             entityStream;
      private         Iterator<AtlasEntity>    iterator;
  
      public AtlasEntityStream(AtlasEntity entity) {
          this(new AtlasEntitiesWithExtInfo(entity), null);
      }
  
      public AtlasEntityStream(List<AtlasEntity> entities) {
          this(new AtlasEntitiesWithExtInfo(entities), null);
      }
  
      public AtlasEntityStream(AtlasEntityWithExtInfo entityWithExtInfo) {
          this(new AtlasEntitiesWithExtInfo(entityWithExtInfo), null);
      }
  
      public AtlasEntityStream(AtlasEntitiesWithExtInfo entitiesWithExtInfo) {
          this(entitiesWithExtInfo, null);
      }
  
      public AtlasEntityStream(AtlasEntity entity, EntityStream entityStream) {
          this(new AtlasEntitiesWithExtInfo(entity), entityStream);
      }
  
      public AtlasEntityStream(AtlasEntityWithExtInfo entityWithExtInfo, EntityStream entityStream) {
          this(new AtlasEntitiesWithExtInfo(entityWithExtInfo), entityStream);
      }
  
      public AtlasEntityStream(AtlasEntitiesWithExtInfo entitiesWithExtInfo, EntityStream entityStream) {
          this.entitiesWithExtInfo = entitiesWithExtInfo;
          this.iterator            = this.entitiesWithExtInfo.getEntities().iterator();
          this.entityStream        = entityStream;
      }
  
      @Override
      public boolean hasNext() {
          return iterator.hasNext();
      }
  
      @Override
      public AtlasEntity next() {
          return iterator.hasNext() ? iterator.next() : null;
      }
  
      @Override
      public void reset() {
          this.iterator = entitiesWithExtInfo.getEntities().iterator();
      }
  
      @Override
      public AtlasEntity getByGuid(String guid) {
          return entityStream != null ? entityStream.getByGuid(guid) : entitiesWithExtInfo.getEntity(guid);
      }
  
      @Override
      public String toString() {
          StringBuilder sb = new StringBuilder("AtlasEntityStream{");
  
          sb.append("entitiesWithExtInfo=").append(entitiesWithExtInfo);
          sb.append(", iterator=").append(iterator);
          sb.append('}');
  
          return sb.toString();
      }
  }
  