content: package org.apache.lucene.analysis.miscellaneous;
  
  /**
   * 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.analysis.Token;
  import org.apache.lucene.analysis.TokenStream;
  
  import java.io.IOException;
  
  /**
   * Links two {@link PrefixAwareTokenFilter}.
   * <p/>
   * <b>NOTE:</b> This filter might not behave correctly if used with custom Attributes, i.e. Attributes other than
   * the ones located in org.apache.lucene.analysis.tokenattributes. 
   */
  public class PrefixAndSuffixAwareTokenFilter extends TokenStream {
  
    private PrefixAwareTokenFilter suffix;
  
    public PrefixAndSuffixAwareTokenFilter(TokenStream prefix, TokenStream input, TokenStream suffix) {
      super(suffix);
      prefix = new PrefixAwareTokenFilter(prefix, input) {
        @Override
        public Token updateSuffixToken(Token suffixToken, Token lastInputToken) {
          return PrefixAndSuffixAwareTokenFilter.this.updateInputToken(suffixToken, lastInputToken);
        }
      };
      this.suffix = new PrefixAwareTokenFilter(prefix, suffix) {
        @Override
        public Token updateSuffixToken(Token suffixToken, Token lastInputToken) {
          return PrefixAndSuffixAwareTokenFilter.this.updateSuffixToken(suffixToken, lastInputToken);
        }
      };
    }
  
    public Token updateInputToken(Token inputToken, Token lastPrefixToken) {
      inputToken.setStartOffset(lastPrefixToken.endOffset() + inputToken.startOffset());
      inputToken.setEndOffset(lastPrefixToken.endOffset() + inputToken.endOffset());
      return inputToken;
    }
  
    public Token updateSuffixToken(Token suffixToken, Token lastInputToken) {
      suffixToken.setStartOffset(lastInputToken.endOffset() + suffixToken.startOffset());
      suffixToken.setEndOffset(lastInputToken.endOffset() + suffixToken.endOffset());
      return suffixToken;
    }
  
  
    @Override
    public final boolean incrementToken() throws IOException {
      return suffix.incrementToken();
    }
  
    @Override
    public void reset() throws IOException {
      suffix.reset();
    }
  
  
    @Override
    public void close() throws IOException {
      suffix.close();
    }
  
    @Override
    public void end() throws IOException {
      suffix.end();
    }
  }
  