/*
    * 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.hfile;
  
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
  import org.apache.hadoop.hbase.io.crypto.Encryption;
  import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
  import org.apache.hadoop.hbase.util.ChecksumType;
  
  /**
   * A builder that helps in building up the HFileContext
   */
  @InterfaceAudience.Private
  public class HFileContextBuilder {
  
    public static final int DEFAULT_BYTES_PER_CHECKSUM = 16 * 1024;
  
    /** Whether checksum is enabled or not **/
    private boolean usesHBaseChecksum = true;
    /** Whether mvcc is to be included in the Read/Write **/
    private boolean includesMvcc = true;
    /** Whether tags are to be included in the Read/Write **/
    private boolean includesTags = false;
    /** Compression algorithm used **/
    private Algorithm compression = Algorithm.NONE;
    /** Whether tags to be compressed or not **/
    private boolean compressTags = false;
    /** the checksum type **/
    private ChecksumType checksumType = ChecksumType.getDefaultChecksumType();
    /** the number of bytes per checksum value **/
    private int bytesPerChecksum = DEFAULT_BYTES_PER_CHECKSUM;
    /** Number of uncompressed bytes we allow per block. */
    private int blocksize = HConstants.DEFAULT_BLOCKSIZE;
    private DataBlockEncoding encoding = DataBlockEncoding.NONE;
    /** Crypto context */
    private Encryption.Context cryptoContext = Encryption.Context.NONE;
    private long fileCreateTime = 0;
  
    private String hfileName = null;
  
    public HFileContextBuilder() {}
  
    /**
     * Use this constructor if you want to change a few settings only in another context.
     */
    public HFileContextBuilder(final HFileContext hfc) {
      this.usesHBaseChecksum = hfc.isUseHBaseChecksum();
      this.includesMvcc = hfc.isIncludesMvcc();
      this.includesTags = hfc.isIncludesTags();
      this.compression = hfc.getCompression();
      this.compressTags = hfc.isCompressTags();
      this.checksumType = hfc.getChecksumType();
      this.bytesPerChecksum = hfc.getBytesPerChecksum();
      this.blocksize = hfc.getBlocksize();
      this.encoding = hfc.getDataBlockEncoding();
      this.cryptoContext = hfc.getEncryptionContext();
      this.fileCreateTime = hfc.getFileCreateTime();
      this.hfileName = hfc.getHFileName();
    }
  
    public HFileContextBuilder withHBaseCheckSum(boolean useHBaseCheckSum) {
      this.usesHBaseChecksum = useHBaseCheckSum;
      return this;
    }
  
    public HFileContextBuilder withIncludesMvcc(boolean includesMvcc) {
      this.includesMvcc = includesMvcc;
      return this;
    }
  
    public HFileContextBuilder withIncludesTags(boolean includesTags) {
      this.includesTags = includesTags;
      return this;
    }
  
    public HFileContextBuilder withCompression(Algorithm compression) {
      this.compression = compression;
      return this;
    }
  
    public HFileContextBuilder withCompressTags(boolean compressTags) {
      this.compressTags = compressTags;
     return this;
   }
 
   public HFileContextBuilder withChecksumType(ChecksumType checkSumType) {
     this.checksumType = checkSumType;
     return this;
   }
 
   public HFileContextBuilder withBytesPerCheckSum(int bytesPerChecksum) {
     this.bytesPerChecksum = bytesPerChecksum;
     return this;
   }
 
   public HFileContextBuilder withBlockSize(int blockSize) {
     this.blocksize = blockSize;
     return this;
   }
 
   public HFileContextBuilder withDataBlockEncoding(DataBlockEncoding encoding) {
     this.encoding = encoding;
     return this;
   }
 
   public HFileContextBuilder withEncryptionContext(Encryption.Context cryptoContext) {
     this.cryptoContext = cryptoContext;
     return this;
   }
 
   public HFileContextBuilder withCreateTime(long fileCreateTime) {
     this.fileCreateTime = fileCreateTime;
     return this;
   }
 
   public HFileContextBuilder withHFileName(String name) {
     this.hfileName = name;
     return this;
   }
 
   public HFileContext build() {
     return new HFileContext(usesHBaseChecksum, includesMvcc, includesTags, compression,
         compressTags, checksumType, bytesPerChecksum, blocksize, encoding, cryptoContext,
         fileCreateTime, hfileName);
   }
 }