001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.io.encoding; 019 020import java.io.DataOutputStream; 021import java.io.IOException; 022import org.apache.hadoop.hbase.Cell; 023import org.apache.hadoop.hbase.KeyValue; 024import org.apache.hadoop.hbase.KeyValueUtil; 025import org.apache.hadoop.hbase.PrivateCellUtil; 026import org.apache.hadoop.io.WritableUtils; 027import org.apache.yetus.audience.InterfaceAudience; 028 029@InterfaceAudience.Private 030public class NoneEncoder { 031 032 private DataOutputStream out; 033 private HFileBlockDefaultEncodingContext encodingCtx; 034 035 public NoneEncoder(DataOutputStream out, HFileBlockDefaultEncodingContext encodingCtx) { 036 this.out = out; 037 this.encodingCtx = encodingCtx; 038 } 039 040 public int write(Cell cell) throws IOException { 041 // We write tags seperately because though there is no tag in KV 042 // if the hfilecontext says include tags we need the tags length to be 043 // written 044 int size = KeyValueUtil.oswrite(cell, out, false); 045 // Write the additional tag into the stream 046 if (encodingCtx.getHFileContext().isIncludesTags()) { 047 int tagsLength = cell.getTagsLength(); 048 out.writeShort(tagsLength); 049 if (tagsLength > 0) { 050 PrivateCellUtil.writeTags(out, cell, tagsLength); 051 } 052 size += tagsLength + KeyValue.TAGS_LENGTH_SIZE; 053 } 054 if (encodingCtx.getHFileContext().isIncludesMvcc()) { 055 WritableUtils.writeVLong(out, cell.getSequenceId()); 056 size += WritableUtils.getVIntSize(cell.getSequenceId()); 057 } 058 return size; 059 } 060 061}