[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package testjar; |
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| 20 | |
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| 21 | import java.io.DataInput; |
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| 22 | import java.io.DataOutput; |
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| 23 | import java.io.IOException; |
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| 24 | |
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| 25 | import org.apache.hadoop.io.WritableComparable; |
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| 26 | |
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| 27 | /** |
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| 28 | * This is an example simple writable class. This is used as a class external |
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| 29 | * to the Hadoop IO classes for testing of user Writable classes. |
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| 30 | * |
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| 31 | */ |
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| 32 | public class ExternalWritable |
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| 33 | implements WritableComparable { |
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| 34 | |
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| 35 | private String message = null; |
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| 36 | |
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| 37 | public ExternalWritable() { |
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| 38 | |
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| 39 | } |
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| 40 | |
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| 41 | public ExternalWritable(String message) { |
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| 42 | this.message = message; |
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| 43 | } |
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| 44 | |
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| 45 | public String getMessage() { |
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| 46 | return message; |
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| 47 | } |
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| 48 | |
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| 49 | public void setMessage(String message) { |
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| 50 | this.message = message; |
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| 51 | } |
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| 52 | |
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| 53 | public void readFields(DataInput in) |
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| 54 | throws IOException { |
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| 55 | |
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| 56 | message = null; |
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| 57 | boolean hasMessage = in.readBoolean(); |
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| 58 | if (hasMessage) { |
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| 59 | message = in.readUTF(); |
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| 60 | } |
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| 61 | } |
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| 62 | |
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| 63 | public void write(DataOutput out) |
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| 64 | throws IOException { |
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| 65 | |
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| 66 | boolean hasMessage = (message != null && message.length() > 0); |
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| 67 | out.writeBoolean(hasMessage); |
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| 68 | if (hasMessage) { |
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| 69 | out.writeUTF(message); |
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| 70 | } |
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| 71 | } |
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| 72 | |
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| 73 | public int compareTo(Object o) { |
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| 74 | |
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| 75 | if (!(o instanceof ExternalWritable)) { |
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| 76 | throw new IllegalArgumentException("Input not an ExternalWritable"); |
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| 77 | } |
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| 78 | |
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| 79 | ExternalWritable that = (ExternalWritable)o; |
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| 80 | return this.message.compareTo(that.message); |
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| 81 | } |
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| 82 | |
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| 83 | public String toString() { |
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| 84 | return this.message; |
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| 85 | } |
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| 86 | } |
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