1 package org.apache.lucene.analysis.miscellaneous;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
20 import java.io.IOException;
22 import org.apache.lucene.util.AttributeImpl;
23 import org.apache.lucene.analysis.Token;
24 import org.apache.lucene.analysis.TokenStream;
25 import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
28 * A {@link TokenStream} containing a single token.
30 public final class SingleTokenTokenStream extends TokenStream {
32 private boolean exhausted = false;
34 // The token needs to be immutable, so work with clones!
35 private Token singleToken;
36 private final AttributeImpl tokenAtt;
38 public SingleTokenTokenStream(Token token) {
39 super(Token.TOKEN_ATTRIBUTE_FACTORY);
42 this.singleToken = (Token) token.clone();
44 tokenAtt = (AttributeImpl) addAttribute(CharTermAttribute.class);
45 assert (tokenAtt instanceof Token);
49 public final boolean incrementToken() throws IOException {
54 singleToken.copyTo(tokenAtt);
61 public void reset() throws IOException {
65 public Token getToken() {
66 return (Token) singleToken.clone();
69 public void setToken(Token token) {
70 this.singleToken = (Token) token.clone();