| /** |
| * 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.v1; |
| |
| import org.apache.atlas.model.instance.AtlasEntity; |
| import org.apache.atlas.model.instance.AtlasEntity.AtlasEntityWithExtInfo; |
| import org.apache.atlas.model.instance.AtlasEntity.AtlasEntitiesWithExtInfo; |
| |
| import java.util.Iterator; |
| |
| 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)); |
| } |
| |
| public AtlasEntityStream(AtlasEntityWithExtInfo entityWithExtInfo) { |
| this(new AtlasEntitiesWithExtInfo(entityWithExtInfo)); |
| } |
| |
| public AtlasEntityStream(AtlasEntitiesWithExtInfo entitiesWithExtInfo) { |
| this.entitiesWithExtInfo = entitiesWithExtInfo; |
| this.iterator = this.entitiesWithExtInfo.getEntities().iterator(); |
| this.entityStream = null; |
| } |
| |
| public AtlasEntityStream(AtlasEntity entity, EntityStream entityStream) { |
| this.entitiesWithExtInfo = new AtlasEntitiesWithExtInfo(entity); |
| this.iterator = this.entitiesWithExtInfo.getEntities().iterator(); |
| this.entityStream = entityStream; |
| } |
| |
| public AtlasEntityStream(AtlasEntityWithExtInfo entityWithExtInfo, EntityStream entityStream) { |
| this.entitiesWithExtInfo = new AtlasEntitiesWithExtInfo(entityWithExtInfo); |
| 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() { |
| StringBuffer sb = new StringBuffer("AtlasEntityStream{"); |
| |
| sb.append("entitiesWithExtInfo=").append(entitiesWithExtInfo); |
| sb.append(", iterator=").append(iterator); |
| sb.append('}'); |
| |
| return sb.toString(); |
| } |
| } |