BooleanWritable.java
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上传日期:2018-01-08
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文件大小:3k
- /**
- * 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.io;
- import java.io.*;
- /**
- * A WritableComparable for booleans.
- */
- public class BooleanWritable implements WritableComparable {
- private boolean value;
- /**
- */
- public BooleanWritable() {};
- /**
- */
- public BooleanWritable(boolean value) {
- set(value);
- }
- /**
- * Set the value of the BooleanWritable
- */
- public void set(boolean value) {
- this.value = value;
- }
- /**
- * Returns the value of the BooleanWritable
- */
- public boolean get() {
- return value;
- }
- /**
- */
- public void readFields(DataInput in) throws IOException {
- value = in.readBoolean();
- }
- /**
- */
- public void write(DataOutput out) throws IOException {
- out.writeBoolean(value);
- }
- /**
- */
- public boolean equals(Object o) {
- if (!(o instanceof BooleanWritable)) {
- return false;
- }
- BooleanWritable other = (BooleanWritable) o;
- return this.value == other.value;
- }
- public int hashCode() {
- return value ? 0 : 1;
- }
- /**
- */
- public int compareTo(Object o) {
- boolean a = this.value;
- boolean b = ((BooleanWritable) o).value;
- return ((a == b) ? 0 : (a == false) ? -1 : 1);
- }
-
- public String toString() {
- return Boolean.toString(get());
- }
- /**
- * A Comparator optimized for BooleanWritable.
- */
- public static class Comparator extends WritableComparator {
- public Comparator() {
- super(BooleanWritable.class);
- }
- public int compare(byte[] b1, int s1, int l1,
- byte[] b2, int s2, int l2) {
- boolean a = (readInt(b1, s1) == 1) ? true : false;
- boolean b = (readInt(b2, s2) == 1) ? true : false;
- return ((a == b) ? 0 : (a == false) ? -1 : 1);
- }
- }
- static {
- WritableComparator.define(BooleanWritable.class, new Comparator());
- }
- }