fragmenter.java

lucene2.2.0版本

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.
 */

import org.apache.lucene.analysis.Token;

/**
 * Implements the policy for breaking text into multiple fragments for consideration
 * by the {@link Highlighter} class. A sophisticated implementation may do this on the basis
 * of detecting end of sentences in the text. 
 * @author [e-mail]
 */
public interface Fragmenter
{
	/**
	 * Initializes the Fragmenter
	 * @param originalText
	 */
	public void start(String originalText);

	/**
	 * Test to see if this token from the stream should be held in a new TextFragment
	 * @param nextToken
	 */
	public boolean isNewFragment(Token nextToken);
}