lucene/analysis/common/src/java/org/apache/lucene/analysis/compound/hyphenation/PatternConsumer.java

/*
 * 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.
 */
package org.apache.lucene.analysis.compound.hyphenation;

import java.util.ArrayList;

/**
 * This interface is used to connect the XML pattern file parser to the
 * hyphenation tree.
 * 
 * This class has been taken from the Apache FOP project (http://xmlgraphics.apache.org/fop/). They have been slightly modified.
 */
public interface PatternConsumer {

  /**
   * Add a character class. A character class defines characters that are
   * considered equivalent for the purpose of hyphenation (e.g. "aA"). It
   * usually means to ignore case.
   * 
   * @param chargroup character group
   */
  void addClass(String chargroup);

  /**
   * Add a hyphenation exception. An exception replaces the result obtained by
   * the algorithm for cases for which this fails or the user wants to provide
   * his own hyphenation. A hyphenatedword is a vector of alternating String's
   * and {@link Hyphen Hyphen} instances
   */
  void addException(String word, ArrayList<Object> hyphenatedword);

  /**
   * Add hyphenation patterns.
   * 
   * @param pattern the pattern
   * @param values interletter values expressed as a string of digit characters.
   */
  void addPattern(String pattern, String values);

}