DocumentID.java
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上传日期:2018-01-08
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文件大小:2k
- /**
- * 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.contrib.index.mapred;
- import java.io.DataInput;
- import java.io.DataOutput;
- import java.io.IOException;
- import org.apache.hadoop.io.Text;
- import org.apache.hadoop.io.WritableComparable;
- /**
- * The class represents a document id, which is of type text.
- */
- public class DocumentID implements WritableComparable {
- private final Text docID;
- /**
- * Constructor.
- */
- public DocumentID() {
- docID = new Text();
- }
- /**
- * The text of the document id.
- * @return the text
- */
- public Text getText() {
- return docID;
- }
- /* (non-Javadoc)
- * @see java.lang.Comparable#compareTo(java.lang.Object)
- */
- public int compareTo(Object obj) {
- if (this == obj) {
- return 0;
- } else {
- return docID.compareTo(((DocumentID) obj).docID);
- }
- }
- /* (non-Javadoc)
- * @see java.lang.Object#hashCode()
- */
- public int hashCode() {
- return docID.hashCode();
- }
- /* (non-Javadoc)
- * @see java.lang.Object#toString()
- */
- public String toString() {
- return this.getClass().getName() + "[" + docID + "]";
- }
- /* (non-Javadoc)
- * @see org.apache.hadoop.io.Writable#write(java.io.DataOutput)
- */
- public void write(DataOutput out) throws IOException {
- throw new IOException(this.getClass().getName()
- + ".write should never be called");
- }
- /* (non-Javadoc)
- * @see org.apache.hadoop.io.Writable#readFields(java.io.DataInput)
- */
- public void readFields(DataInput in) throws IOException {
- throw new IOException(this.getClass().getName()
- + ".readFields should never be called");
- }
- }