| /* |
| * 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.pig.backend.hadoop; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInput; |
| import java.io.DataInputStream; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.math.BigInteger; |
| |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hadoop.io.WritableComparator; |
| import org.apache.pig.data.BinInterSedes; |
| import org.apache.pig.data.DataType; |
| |
| public class BigIntegerWritable implements WritableComparable<BigIntegerWritable> { |
| |
| private static final BinInterSedes bis = new BinInterSedes(); |
| private BigInteger value; |
| |
| public BigIntegerWritable() { |
| value = BigInteger.ZERO; |
| } |
| |
| public BigIntegerWritable(BigInteger bi) { |
| value = bi; |
| } |
| |
| public void set(BigInteger value) { |
| this.value = value; |
| } |
| |
| public BigInteger get() { |
| return value; |
| } |
| |
| @Override |
| public int compareTo(BigIntegerWritable o) { |
| return value.compareTo(o.get()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return value.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof BigIntegerWritable)) { |
| return false; |
| } |
| return compareTo((BigIntegerWritable)o) == 0; |
| } |
| |
| @Override |
| public String toString() { |
| return value.toString(); |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| value = (BigInteger)bis.readDatum(in); |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| bis.writeDatum(out, value, DataType.BIGINTEGER); |
| } |
| |
| /** A Comparator optimized for BigIntegerWritable. */ |
| //TODO consider trying to do something a big more optimizied |
| public static class Comparator extends WritableComparator { |
| private BigIntegerWritable thisValue = new BigIntegerWritable(); |
| private BigIntegerWritable thatValue = new BigIntegerWritable(); |
| |
| public Comparator() { |
| super(BigIntegerWritable.class); |
| } |
| |
| @Override |
| public int compare(byte[] b1, int s1, int l1, |
| byte[] b2, int s2, int l2) { |
| try { |
| thisValue.readFields(new DataInputStream(new ByteArrayInputStream(b1,s1,l1))); |
| thatValue.readFields(new DataInputStream(new ByteArrayInputStream(b2,s2,l2))); |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to read field from byte array: " + e); |
| } |
| return thisValue.compareTo(thatValue); |
| } |
| } |
| |
| // register this comparator |
| static { |
| WritableComparator.define(BigIntegerWritable.class, new Comparator()); |
| } |
| |
| } |