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Support Chinese character (both Simplified and Tranditional) to most popular Pinyin systems, including Hanyu Pinyin, Tongyong Pinyin, Wade-Giles, MPS2, Yale and Gwoyeu Romatzyh. Support multiple pronounciations and customized output.

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/**
 * This file is part of pinyin4j (http://sourceforge.net/projects/pinyin4j/) and distributed under
 * GNU GENERAL PUBLIC LICENSE (GPL).
 * 
 * pinyin4j is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * pinyin4j is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with pinyin4j.
 */

/**
 * 
 */
package net.sourceforge.pinyin4j;

import java.io.FileNotFoundException;
import java.io.IOException;

import com.hp.hpl.sparta.Document;
import com.hp.hpl.sparta.ParseException;
import com.hp.hpl.sparta.Parser;

/**
 * A class contains resource that translates from Hanyu Pinyin to Gwoyeu
 * Romatzyh
 * 
 * @author Li Min ([email protected])
 * 
 */
class GwoyeuRomatzyhResource {
    /**
     * A DOM model contains Hanyu Pinyin to Gwoyeu Romatzyh mapping
     */
    private Document pinyinToGwoyeuMappingDoc;

    /**
     * @param pinyinToGwoyeuMappingDoc
     *            The pinyinToGwoyeuMappingDoc to set.
     */
    private void setPinyinToGwoyeuMappingDoc(Document pinyinToGwoyeuMappingDoc) {
        this.pinyinToGwoyeuMappingDoc = pinyinToGwoyeuMappingDoc;
    }

    /**
     * @return Returns the pinyinToGwoyeuMappingDoc.
     */
    Document getPinyinToGwoyeuMappingDoc() {
        return pinyinToGwoyeuMappingDoc;
    }

    /**
     * Private constructor as part of the singleton pattern.
     */
    private GwoyeuRomatzyhResource() {
        initializeResource();
    }

    /**
     * Initialiez a DOM contains Hanyu Pinyin to Gwoyeu mapping
     */
    private void initializeResource() {
        try {
            final String mappingFileName = "/pinyindb/pinyin_gwoyeu_mapping.xml";
            final String systemId = "";

            // Parse file to DOM Document
            setPinyinToGwoyeuMappingDoc(Parser.parse(systemId, ResourceHelper
                    .getResourceInputStream(mappingFileName)));

        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }

    /**
     * Singleton factory method.
     * 
     * @return the one and only MySingleton.
     */
    static GwoyeuRomatzyhResource getInstance() {
        return GwoyeuRomatzyhSystemResourceHolder.theInstance;
    }

    /**
     * Singleton implementation helper.
     */
    private static class GwoyeuRomatzyhSystemResourceHolder {
        static final GwoyeuRomatzyhResource theInstance = new GwoyeuRomatzyhResource();
    }
}