HanjaUtils.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.kr.utils;

import java.io.IOException;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.lucene.analysis.kr.morph.MorphException;

public class HanjaUtils {

	private static Map<String, char[]> mapHanja;
	
	public synchronized static void loadDictionary() throws MorphException {
		try {
			List<String> strList = FileUtil.readLines("org/apache/lucene/analysis/kr/dic/mapHanja.dic","UTF-8");
			mapHanja = new HashMap();		
		
			for(int i=0;i<strList.size();i++) {
				
				if(strList.get(i).length()<1||
						strList.get(i).indexOf(",")==-1) continue;

				String[] hanInfos = StringUtil.split(strList.get(i),",");

				if(hanInfos.length!=2) continue;
				
				String hanja = StringEscapeUtil.unescapeJava(hanInfos[0]);

				mapHanja.put(hanja, hanInfos[1].toCharArray());
			}			
		} catch (IOException e) {
			throw new MorphException(e);
		}
	}
	
	/**
	 * 한자에 대응하는 한글을 찾아서 반환한다.
	 * 하나의 한자는 여러 음으로 읽일 수 있으므로 가능한 모든 음을 한글로 반환한다.
	 * @param hanja
	 * @return
	 * @throws MorphException
	 */
    public static char[] convertToHangul(char hanja) throws MorphException {
 
    	if(mapHanja==null)  loadDictionary();

//		if(hanja>0x9FFF||hanja<0x3400) return new char[]{hanja};
		
		char[] result = mapHanja.get(new String(new char[]{hanja}));
		if(result==null) return new char[]{hanja};
		
    	return result;
    }
}