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.types; 019 020import org.apache.hadoop.hbase.util.Bytes; 021import org.apache.hadoop.hbase.util.Order; 022import org.apache.hadoop.hbase.util.PositionedByteRange; 023import org.apache.yetus.audience.InterfaceAudience; 024 025/** 026 * An {@code DataType} for interacting with values encoded using 027 * {@link Bytes#putDouble(byte[], int, double)}. Intended to make it easier to transition away from 028 * direct use of {@link Bytes}. 029 * @see Bytes#putDouble(byte[], int, double) 030 * @see Bytes#toDouble(byte[]) 031 */ 032@InterfaceAudience.Public 033public class RawDouble implements DataType<Double> { 034 035 @Override 036 public boolean isOrderPreserving() { 037 return false; 038 } 039 040 @Override 041 public Order getOrder() { 042 return null; 043 } 044 045 @Override 046 public boolean isNullable() { 047 return false; 048 } 049 050 @Override 051 public boolean isSkippable() { 052 return true; 053 } 054 055 @Override 056 public int encodedLength(Double val) { 057 return Bytes.SIZEOF_DOUBLE; 058 } 059 060 @Override 061 public Class<Double> encodedClass() { 062 return Double.class; 063 } 064 065 @Override 066 public int skip(PositionedByteRange src) { 067 src.setPosition(src.getPosition() + Bytes.SIZEOF_DOUBLE); 068 return Bytes.SIZEOF_DOUBLE; 069 } 070 071 @Override 072 public Double decode(PositionedByteRange src) { 073 double val = Bytes.toDouble(src.getBytes(), src.getOffset() + src.getPosition()); 074 skip(src); 075 return val; 076 } 077 078 @Override 079 public int encode(PositionedByteRange dst, Double val) { 080 Bytes.putDouble(dst.getBytes(), dst.getOffset() + dst.getPosition(), val); 081 return skip(dst); 082 } 083 084 /** 085 * Read a {@code double} value from the buffer {@code buff}. 086 */ 087 public double decodeDouble(byte[] buff, int offset) { 088 double val = Bytes.toDouble(buff, offset); 089 return val; 090 } 091 092 /** 093 * Write instance {@code val} into buffer {@code buff}. 094 */ 095 public int encodeDouble(byte[] buff, int offset, double val) { 096 return Bytes.putDouble(buff, offset, val); 097 } 098}