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