/tags/release-0.0.0-rc0/hive/external/serde/src/java/org/apache/hadoop/hive/serde2/io/DoubleWritable.java
Java | 109 lines | 61 code | 20 blank | 28 comment | 4 complexity | acd1e542cd61a77c31ba172d3da78070 MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * 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.
- */
- /**
- * This file is back-ported from hadoop-0.19, to make sure hive can run
- * with hadoop-0.17.
- */
- package org.apache.hadoop.hive.serde2.io;
- import java.io.DataInput;
- import java.io.DataOutput;
- import java.io.IOException;
- import org.apache.hadoop.io.WritableComparable;
- import org.apache.hadoop.io.WritableComparator;
- /**
- * Writable for Double values.
- */
- public class DoubleWritable implements WritableComparable {
- private double value = 0.0;
- public DoubleWritable() {
- }
- public DoubleWritable(double value) {
- set(value);
- }
- public void readFields(DataInput in) throws IOException {
- value = in.readDouble();
- }
- public void write(DataOutput out) throws IOException {
- out.writeDouble(value);
- }
- public void set(double value) {
- this.value = value;
- }
- public double get() {
- return value;
- }
- /**
- * Returns true iff <code>o</code> is a DoubleWritable with the same value.
- */
- @Override
- public boolean equals(Object o) {
- if (!(o instanceof DoubleWritable)) {
- return false;
- }
- DoubleWritable other = (DoubleWritable) o;
- return value == other.value;
- }
- @Override
- public int hashCode() {
- long v = Double.doubleToLongBits(value);
- return (int) (v ^ (v >>> 32));
- }
- public int compareTo(Object o) {
- DoubleWritable other = (DoubleWritable) o;
- return (value < other.value ? -1 : (value == other.value ? 0 : 1));
- }
- @Override
- public String toString() {
- return Double.toString(value);
- }
- /** A Comparator optimized for DoubleWritable. */
- public static class Comparator extends WritableComparator {
- public Comparator() {
- super(DoubleWritable.class);
- }
- @Override
- public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
- double thisValue = readDouble(b1, s1);
- double thatValue = readDouble(b2, s2);
- return (thisValue < thatValue ? -1 : (thisValue == thatValue ? 0 : 1));
- }
- }
- static { // register this comparator
- WritableComparator.define(DoubleWritable.class, new Comparator());
- }
- }