/**
* 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.hive.common.util;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* A helper class for fast serialization of decimal128 in the BigDecimal byte[] representation
*
*/
public class Decimal128FastBuffer {
/**
* Preallocated byte[] for each Decimal128 size (0-4)
*/
private final byte[][] sumBytes;
/**
* Preallocated ByteBuffer wrappers around each sumBytes
*/
private final ByteBuffer[] sumBuffer;
public Decimal128FastBuffer() {
sumBytes = new byte[5][];
sumBuffer = new ByteBuffer[5];
sumBytes[0] = new byte[1];
sumBuffer[0] = ByteBuffer.wrap(sumBytes[0]);
sumBytes[1] = new byte[5];
sumBuffer[1] = ByteBuffer.wrap(sumBytes[1]);
sumBuffer[1].order(ByteOrder.BIG_ENDIAN);
sumBytes[2] = new byte[9];
sumBuffer[2] = ByteBuffer.wrap(sumBytes[2]);
sumBuffer[2].order(ByteOrder.BIG_ENDIAN);
sumBytes[3] = new byte[13];
sumBuffer[3] = ByteBuffer.wrap(sumBytes[3]);
sumBuffer[3].order(ByteOrder.BIG_ENDIAN);
sumBytes[4] = new byte[17];
sumBuffer[4] = ByteBuffer.wrap(sumBytes[4]);
sumBuffer[4].order(ByteOrder.BIG_ENDIAN);
}
public ByteBuffer getByteBuffer(int index) {
return sumBuffer[index];
}
public byte[] getBytes(int index) {
return sumBytes[index];
}
}