1 package org.apache.lucene.analysis.tokenattributes;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
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20 import org.apache.lucene.analysis.TokenStream;
21 import org.apache.lucene.util.AttributeImpl;
24 *This attribute can be used to mark a token as a keyword. Keyword aware
25 * {@link TokenStream}s can decide to modify a token based on the return value
26 * of {@link #isKeyword()} if the token is modified. Stemming filters for
27 * instance can use this attribute to conditionally skip a term if
28 * {@link #isKeyword()} returns <code>true</code>.
30 public final class KeywordAttributeImpl extends AttributeImpl implements
32 private boolean keyword;
40 public void copyTo(AttributeImpl target) {
41 KeywordAttribute attr = (KeywordAttribute) target;
42 attr.setKeyword(keyword);
46 public int hashCode() {
47 return keyword ? 31 : 37;
51 public boolean equals(Object obj) {
54 if (getClass() != obj.getClass())
56 final KeywordAttributeImpl other = (KeywordAttributeImpl) obj;
57 return keyword == other.keyword;
61 * Returns <code>true</code> iff the current token is a keyword, otherwise
64 * @return <code>true</code> iff the current token is a keyword, otherwise
67 public boolean isKeyword() {
72 * Marks the current token as keyword iff set to <code>true</code>.
75 * <code>true</code> iff the current token is a keyword, otherwise
78 public void setKeyword(boolean isKeyword) {