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package org.apache.lucene.search.highlight;
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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.analysis.TokenFilter;
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import org.apache.lucene.analysis.TokenStream;
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import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;
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* This TokenFilter limits the number of tokens while indexing by adding up the
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public final class OffsetLimitTokenFilter extends TokenFilter {
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private int offsetCount;
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private OffsetAttribute offsetAttrib = getAttribute(OffsetAttribute.class);
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private int offsetLimit;
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public OffsetLimitTokenFilter(TokenStream input, int offsetLimit) {
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this.offsetLimit = offsetLimit;
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public boolean incrementToken() throws IOException {
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if (offsetCount < offsetLimit && input.incrementToken()) {
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int offsetLength = offsetAttrib.endOffset() - offsetAttrib.startOffset();
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offsetCount += offsetLength;
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public void reset() throws IOException {