content: package org.apache.lucene.search.highlight;
  
  /**
   * 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.
   */
  
  /**
   * Simple {@link Formatter} implementation to highlight terms with a pre and
   * post tag.
   */
  public class SimpleHTMLFormatter implements Formatter {
    
    private static final String DEFAULT_PRE_TAG = "<B>";
    private static final String DEFAULT_POST_TAG = "</B>";
    
  	private String preTag;
  	private String postTag;
  	
  	public SimpleHTMLFormatter(String preTag, String postTag) {
  		this.preTag = preTag;
  		this.postTag = postTag;
  	}
  
  	/** Default constructor uses HTML: &lt;B&gt; tags to markup terms. */
  	public SimpleHTMLFormatter() {
  	  this(DEFAULT_PRE_TAG, DEFAULT_POST_TAG);
  	}
  
  	/* (non-Javadoc)
  	 * @see org.apache.lucene.search.highlight.Formatter#highlightTerm(java.lang.String, org.apache.lucene.search.highlight.TokenGroup)
  	 */
  	public String highlightTerm(String originalText, TokenGroup tokenGroup) {
  	  if (tokenGroup.getTotalScore() <= 0) {
  	    return originalText;
  	  }
  	  
  	  // Allocate StringBuilder with the right number of characters from the
      // beginning, to avoid char[] allocations in the middle of appends.
  	  StringBuilder returnBuffer = new StringBuilder(preTag.length() + originalText.length() + postTag.length());
  	  returnBuffer.append(preTag);
  	  returnBuffer.append(originalText);
  	  returnBuffer.append(postTag);
  	  return returnBuffer.toString();
  	}
  	
  }
  