| /** |
| * 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 testjar; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.WritableComparable; |
| |
| /** |
| * This is an example simple writable class. This is used as a class external |
| * to the Hadoop IO classes for testing of user Writable classes. |
| * |
| */ |
| public class ExternalWritable |
| implements WritableComparable { |
| |
| private String message = null; |
| |
| public ExternalWritable() { |
| |
| } |
| |
| public ExternalWritable(String message) { |
| this.message = message; |
| } |
| |
| public String getMessage() { |
| return message; |
| } |
| |
| public void setMessage(String message) { |
| this.message = message; |
| } |
| |
| public void readFields(DataInput in) |
| throws IOException { |
| |
| message = null; |
| boolean hasMessage = in.readBoolean(); |
| if (hasMessage) { |
| message = in.readUTF(); |
| } |
| } |
| |
| public void write(DataOutput out) |
| throws IOException { |
| |
| boolean hasMessage = (message != null && message.length() > 0); |
| out.writeBoolean(hasMessage); |
| if (hasMessage) { |
| out.writeUTF(message); |
| } |
| } |
| |
| public int compareTo(Object o) { |
| |
| if (!(o instanceof ExternalWritable)) { |
| throw new IllegalArgumentException("Input not an ExternalWritable"); |
| } |
| |
| ExternalWritable that = (ExternalWritable)o; |
| return this.message.compareTo(that.message); |
| } |
| |
| public String toString() { |
| return this.message; |
| } |
| } |