package mcm.adc;

import java.io.ByteArrayInputStream;
import java.lang.reflect.Field;

import org.apache.xerces.parsers.DOMParser;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

public class SvcContent {

	/** 分析結果 */
	protected Document dom;

	/**
	 * 把報文分析成一個Document
	 * 
	 * @param svcContent
	 * @return
	 */
	public SvcContent(String svcContent) {
		try {
			svcContent = "<?xml version=\"1.0\"?>\n" + svcContent;

			InputSource in = new InputSource(new ByteArrayInputStream(svcContent.getBytes("UTF-8")));

			DOMParser parser = new DOMParser();
			parser.parse(in);

			dom = parser.getDocument();

			Field fldList[] = this.getClass().getDeclaredFields();
			for (int i = 0; i < fldList.length; i++) {
				Field fld = fldList[i];

				fld.setAccessible(true);

				try {
					String fldName = fld.getName();
					String value = getFirstNodeText(fldName);
					if (value != null) {
						if (fld.getType().equals(int.class)) {
							fld.setInt(this, Integer.parseInt(value));
						} else {
							fld.set(this, value);
						}
					}
				} catch (Exception ex) {
					// 無視
				}
			}
		} catch (Exception ex) {
			throw new RuntimeException(ex);
		}
	}

	/**
	 * 取得Document中出現的第一個TagName中的文字信息
	 * 
	 * @param dom
	 * @param tagName
	 * @return
	 */
	protected String getFirstNodeText(String tagName) {
		NodeList list = dom.getElementsByTagName(tagName);
		if (list.getLength() > 0) {
			return list.item(0).getTextContent();
		}

		return null;
	}

	/**
	 * 根據類結構,取得數據
	 * 
	 * @param node
	 * @param dataClass
	 * @return
	 */
	protected Object getDataObject(Node node, Class dataClass) {
		try {
			Object data = dataClass.newInstance();

			NodeList list = node.getChildNodes();
			for(int i=0; i<list.getLength(); i++){
				Node subNode = list.item(i);
				
				try{
					Field fld = dataClass.getDeclaredField(subNode.getNodeName());
					String textContent = subNode.getTextContent();
					fld.setAccessible(true);
					if (fld.getType().equals(int.class)) {
						fld.setInt(data, Integer.parseInt(textContent));
					} else {
						fld.set(data, textContent);
					}
				}
				catch(Exception ex){
					// 無視
				}
			}

			return data;
		} catch (Exception ex) {
			ex.printStackTrace(System.err);
			return null;
		}
	}
}