xmldictnumconuterwithsax.java

使用OSGi框架开发的分布式电子辞典

/*
 * @(#)XmlDictNumConuterWithSAX.java.
 * 
 * This program 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 3 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 Library General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
package ynu.edu.cn.sei.stoneagedict.util;

import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import ynu.edu.cn.sei.stoneagedict.util.exception.NullWordMarkException;

/**
 * 用sax解析xml词库文件,统计xml词库文件中的单词数量.
 * @author zy
 * @version 1.0.0.0, Mar 18, 2008
 */
public class XmlDictNumConuterWithSAX {

    private SAXParserFactory saxFactory;
    private SAXParser saxParser;
    private String filePath = null;
    private String wordMark = null;

    /**
     * 带参数的构造器
     * @param filePath
     *         xml文件的路径或url地址
     * @param wordMark
     *         目标文件的单词开头的标记
     */
    public XmlDictNumConuterWithSAX(String filePath, String wordMark) {
        this.filePath = filePath;
        this.wordMark = wordMark;
    }

    public int getNum() throws NullWordMarkException{
        File file = new File(this.filePath);
        XMLCounterHandler xmlHandler = new XMLCounterHandler();
        if(this.wordMark == null){
            throw new NullWordMarkException("单词标记为空!");
        }
        xmlHandler.setWordMark(this.wordMark);
        this.saxFactory = SAXParserFactory.newInstance();
        this.saxFactory.setNamespaceAware(true);
        try {
            this.saxParser = this.saxFactory.newSAXParser();
        } catch (ParserConfigurationException ex) {
            ex.printStackTrace();
        } catch (SAXException ex) {
            ex.printStackTrace();
        }
        try {
            this.saxParser.parse(file, xmlHandler);
        } catch (SAXException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return xmlHandler.getNum();
    }
}