1 package org.apache.lucene.analysis;
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;
23 * This TokenFilter limits the number of tokens while indexing. It is
24 * a replacement for the maximum field length setting inside {@link org.apache.lucene.index.IndexWriter}.
26 public final class LimitTokenCountFilter extends TokenFilter {
28 private final int maxTokenCount;
29 private int tokenCount = 0;
32 * Build a filter that only accepts tokens up to a maximum number.
34 public LimitTokenCountFilter(TokenStream in, int maxTokenCount) {
36 this.maxTokenCount = maxTokenCount;
40 public boolean incrementToken() throws IOException {
41 if (tokenCount < maxTokenCount && input.incrementToken()) {
49 public void reset() throws IOException {