| /* |
| * 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.hbase.io.encoding; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import org.apache.hadoop.hbase.ByteBufferKeyOnlyKeyValue; |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.KeyValue; |
| import org.apache.hadoop.hbase.io.hfile.BlockType; |
| import org.apache.hadoop.hbase.io.hfile.HFileContext; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| @InterfaceAudience.Private |
| public abstract class AbstractDataBlockEncoder implements DataBlockEncoder { |
| |
| @Override |
| public HFileBlockEncodingContext newDataBlockEncodingContext( |
| DataBlockEncoding encoding, byte[] header, HFileContext meta) { |
| return new HFileBlockDefaultEncodingContext(encoding, header, meta); |
| } |
| |
| @Override |
| public HFileBlockDecodingContext newDataBlockDecodingContext(HFileContext meta) { |
| return new HFileBlockDefaultDecodingContext(meta); |
| } |
| |
| protected void postEncoding(HFileBlockEncodingContext encodingCtx) |
| throws IOException { |
| if (encodingCtx.getDataBlockEncoding() != DataBlockEncoding.NONE) { |
| encodingCtx.postEncoding(BlockType.ENCODED_DATA); |
| } else { |
| encodingCtx.postEncoding(BlockType.DATA); |
| } |
| } |
| |
| protected Cell createFirstKeyCell(ByteBuffer key, int keyLength) { |
| if (key.hasArray()) { |
| return new KeyValue.KeyOnlyKeyValue(key.array(), key.arrayOffset() |
| + key.position(), keyLength); |
| } else { |
| return new ByteBufferKeyOnlyKeyValue(key, key.position(), keyLength); |
| } |
| } |
| |
| /** |
| * Decorates EncodedSeeker with a {@link HFileBlockDecodingContext} |
| */ |
| protected abstract static class AbstractEncodedSeeker implements EncodedSeeker { |
| protected HFileBlockDecodingContext decodingCtx; |
| |
| public AbstractEncodedSeeker(HFileBlockDecodingContext decodingCtx) { |
| this.decodingCtx = decodingCtx; |
| } |
| |
| protected boolean includesMvcc() { |
| return this.decodingCtx.getHFileContext().isIncludesMvcc(); |
| } |
| |
| protected boolean includesTags() { |
| return this.decodingCtx.getHFileContext().isIncludesTags(); |
| } |
| } |
| } |