package proxy.AOPByDynamicProxy;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.io.StringReader;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.InputSource;

public class XmlReader {

public static void readXml(String filePath){

String xml = load(filePath);

try{

DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();

Document document;

DocumentBuilder dbBuilder = dbFactory.newDocumentBuilder();

StringReader sr = new StringReader(xml);

InputSource is = new InputSource(sr);

document = dbBuilder.parse(is);

Element root = document.getDocumentElement();

findMethod(root.getChildNodes());

}

catch(Exception e){

e.printStackTrace();

}

}

public static void findMethod(NodeList elementList){

for (int i = 0; i < elementList.getLength(); i++) {

Node elementNode = elementList.item(i);

//System.out.println("allnode: "+elementNode.getNodeName());

if (elementNode.getNodeType() == Node.ELEMENT_NODE) {

Element element = (Element) elementNode;

String name = element.getNodeName();

if(name.equalsIgnoreCase("aop")){

readMethod(element.getChildNodes());

}

else{

findMethod(element.getChildNodes());

}

}

}

}

private static void readMethod(NodeList elementList){

String methodName = "";

for (int i = 0; i < elementList.getLength(); i++) {

Node elementNode = elementList.item(i);

if (elementNode.getNodeType() == Node.ELEMENT_NODE) {

Element element = (Element) elementNode;

String name = element.getNodeName();

if(name.equals("method")){

if(methodName==null||methodName.length()==0)methodName = element.getFirstChild().getTextContent();

}

else if(name.equals("type")){

String type = element.getFirstChild().getTextContent();

if(type.equals("after")){

ProxyHandler.afterMethod = methodName;

}

else{

ProxyHandler.beforeMethod = methodName;

}

}

}

}

}

private static String load(String path){

try{

File file = new File(path);

FileReader reader = new FileReader(file);

BufferedReader bReader = new BufferedReader(reader);

StringBuilder sb = new StringBuilder();

String s = "";

while ((s =bReader.readLine()) != null) {

sb.append(s + "\n");

//System.out.println(s);

}

bReader.close();

return sb.toString();

}

catch(Exception e){

e.printStackTrace();

}

return null;

}

}