hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/GetMountTableEntriesResponsePBImpl.java

/**
 * 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
 *
 *     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 org.apache.hadoop.hdfs.server.federation.store.protocol.impl.pb;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.GetMountTableEntriesResponseProto;
import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.GetMountTableEntriesResponseProtoOrBuilder;
import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.MountTableRecordProto;
import org.apache.hadoop.hdfs.server.federation.store.protocol.GetMountTableEntriesResponse;
import org.apache.hadoop.hdfs.server.federation.store.records.MountTable;
import org.apache.hadoop.hdfs.server.federation.store.records.impl.pb.MountTablePBImpl;
import org.apache.hadoop.hdfs.server.federation.store.records.impl.pb.PBRecord;

import com.google.protobuf.Message;

/**
 * Protobuf implementation of the state store API object
 * GetMountTableEntriesResponse.
 */
public class GetMountTableEntriesResponsePBImpl
    extends GetMountTableEntriesResponse implements PBRecord {

  private FederationProtocolPBTranslator<GetMountTableEntriesResponseProto,
      GetMountTableEntriesResponseProto.Builder,
      GetMountTableEntriesResponseProtoOrBuilder> translator =
          new FederationProtocolPBTranslator<GetMountTableEntriesResponseProto,
              GetMountTableEntriesResponseProto.Builder,
              GetMountTableEntriesResponseProtoOrBuilder>(
                  GetMountTableEntriesResponseProto.class);

  public GetMountTableEntriesResponsePBImpl() {
  }

  public GetMountTableEntriesResponsePBImpl(
      GetMountTableEntriesResponseProto proto) {
    this.translator.setProto(proto);
  }

  @Override
  public GetMountTableEntriesResponseProto getProto() {
    return this.translator.build();
  }

  @Override
  public void setProto(Message proto) {
    this.translator.setProto(proto);
  }

  @Override
  public void readInstance(String base64String) throws IOException {
    this.translator.readInstance(base64String);
  }

  @Override
  public List<MountTable> getEntries() throws IOException {
    List<MountTableRecordProto> entries =
        this.translator.getProtoOrBuilder().getEntriesList();
    List<MountTable> ret = new ArrayList<MountTable>();
    for (MountTableRecordProto entry : entries) {
      MountTable record = new MountTablePBImpl(entry);
      ret.add(record);
    }
    return ret;
  }

  @Override
  public void setEntries(List<MountTable> records) throws IOException {
    this.translator.getBuilder().clearEntries();
    for (MountTable entry : records) {
      if (entry instanceof MountTablePBImpl) {
        MountTablePBImpl entryPB = (MountTablePBImpl)entry;
        this.translator.getBuilder().addEntries(entryPB.getProto());
      }
    }
  }

  @Override
  public long getTimestamp() {
    return this.translator.getProtoOrBuilder().getTimestamp();
  }

  @Override
  public void setTimestamp(long time) {
    this.translator.getBuilder().setTimestamp(time);
  }
}