xmlparser.java

一个非常好的FRAMWRK!是一个外国组织做的!不!

/**
 * Copyright 2003-2005 the original author or authors.
 * Licensed 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 com.jdon.controller.config;

import java.io.InputStream;
import java.util.LinkedHashMap;
import java.util.Map;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;

import com.jdon.util.Debug;
import com.jdon.util.FileLocator;

/**
 * by Jdom parse the jdonframework.xml
 * dom4j is faster than jdom, but this parser only be runned for
 * one time ,so parsing speed is not important.
 *
 * <p>@author <a href="mailto:[e-mail]">banq</a></p>
 * <p>@version JdonFramework 2005 v1.0</p>
 */
public abstract class XmlParser {
  private final static String module = XmlParser.class.getName();
  
  private FileLocator fileLocator = new FileLocator();
  private Document doc;

  public Map load(String configFileName)  {
    Map mps = new LinkedHashMap();
    try {
      if (configFileName == null)
         return mps;
      
      if (doc == null){
        buildDocument(configFileName);       
      }
      if (doc == null)
        return mps;     
      
      Element root = doc.getRootElement();
      //Iterator iter = root.getChildren().iterator();
      //while(iter.hasNext()){
          //Debug.logVerbose(" test: " + iter.next(), module);          
      //}
      parse(root, mps);

      Debug.logVerbose("<!--   config load finished -->", module);
    } catch (Exception ex) {
      Debug.logError("configure FileName: " + configFileName + " parsed error: " + ex, module);
    }
    return mps;
  }

  private void buildDocument(String configFileName)  {    
    Debug.logVerbose(" locate configure file  :" + configFileName, module);    
    try {
        InputStream xmlStream = fileLocator.getConfPathXmlStream(configFileName);    
        if (xmlStream == null){
            Debug.logVerbose("can't locate file:" + configFileName, module);
            return;
        }else{
            Debug.logVerbose(" configure file found :" + xmlStream, module);
        }

        SAXBuilder builder = new SAXBuilder();
        builder.setEntityResolver(new DTDEntityResolver());
        this.doc = builder.build(xmlStream);
        Debug.logVerbose(" got mapping file ", module);
    } catch (JDOMException e) {
        Debug.logError(" JDOMException error: " + e, module);
    }
  }

  public abstract void parse(Element root, Map results) throws Exception;

  public Document getDoc() {
    return doc;
  }

  public void setDoc(Document doc) {
    this.doc = doc;
  }

}