content: package org.apache.lucene.analysis;
  
  /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import org.apache.lucene.document.Fieldable;
  
  import java.io.Reader;
  import java.io.IOException;
  
  /**
   * This Analyzer limits the number of tokens while indexing. It is
   * a replacement for the maximum field length setting inside {@link org.apache.lucene.index.IndexWriter}.
   */
  public final class LimitTokenCountAnalyzer extends Analyzer {
    private final Analyzer delegate;
    private final int maxTokenCount;
  
    /**
     * Build an analyzer that limits the maximum number of tokens per field.
     */
    public LimitTokenCountAnalyzer(Analyzer delegate, int maxTokenCount) {
      this.delegate = delegate;
      this.maxTokenCount = maxTokenCount;
    }
    
    @Override
    public TokenStream tokenStream(String fieldName, Reader reader) {
      return new LimitTokenCountFilter(
        delegate.tokenStream(fieldName, reader), maxTokenCount
      );
    }
    
    @Override
    public TokenStream reusableTokenStream(String fieldName, Reader reader) throws IOException {
      return new LimitTokenCountFilter(
        delegate.reusableTokenStream(fieldName, reader), maxTokenCount
      );
    }
    
    @Override
    public int getPositionIncrementGap(String fieldName) {
      return delegate.getPositionIncrementGap(fieldName);
    }
  
    @Override
    public int getOffsetGap(Fieldable field) {
      return delegate.getOffsetGap(field);
    }
    
    @Override
    public String toString() {
      return "LimitTokenCountAnalyzer(" + delegate.toString() + ", maxTokenCount=" + maxTokenCount + ")";
    }
  }
  