/*
 * Created on May 30, 2003
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package CDBuilder.couplingSyntaxEditor.convertToXML;

import java.io.FileWriter;
import java.io.Writer;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.sun.org.apache.xerces.internal.impl.xs.dom.DOMParser;
/**
 * Takes in the xml file, parses it using the DOM parser
 * provided with the Xerces plugin and writes the content
 * out into a .ma file and format.
 * 
 * @author Lucie Zhao and Sherwin Sim
 * @version 1 May - Aug 2003
 */
public class XMLReader {
	/** keeps track of what line the parser is at */
	int counter = 0;
	/** makes a new file writer to generate a new .ma file */
	FileWriter write= null;
	/**
	 * Initializes the parser and parses the document
	 * Makes a new .ma file with the same name as the xml file and
	 * writes the content of the new file after parsing it
	 * @param name the path of where the xml file is located
	 */
	public XMLReader (String name){	
		DOMParser parser = new DOMParser(); //makes a new parser
		try {
			parser.parse(name);  //parses the document
			int num = name.length();
			Document newDocument = parser.getDocument();
			write = new FileWriter(name.substring(0, num-4) +"ma"); //a new file
			NodeDetails(newDocument,write); //writes the contents to the file
			write.close();
		} catch (Exception e) {
			System.err.println (e);
		}
	}
	/**
	 * Writes the child nodes to the new file
	 * @param node the node to get the contents of
	 * @param writer the file writer that has been opened
	 */
	// this is a recursive function to traverse the document tree
	private void PrintChild (Node node,Writer writer) {
		String Content = "";
		int type = node.getNodeType(); //gets the node type
		//if the node is an element node, write in the file the node name
		if (type == Node.ELEMENT_NODE) {
			if(node.getNodeName().equals("")){
				try{
					writer.write(node.getNodeName());
				} catch (Exception e) {
					System.out.println(e);
				}
			} 
		//if the node is a text node, write the contents to file
		} else if (type == Node.TEXT_NODE) {
			// check if text node and print value
			Content = node.getNodeValue();
			if (!Content.trim().equals("")){
				try{
					writer.write(Content+"\n");
				} catch (Exception e) {
					System.out.println(e);
				}
			}
		//if the node is a comment node, write % and then the contents to file	
		} else if (type == Node.COMMENT_NODE) {
			Content = node.getNodeValue();
			if (!Content.trim().equals("")){
				try{
					writer.write ("%");
				} catch (Exception e) {
					System.out.println(e);
				}
			}
		}	
	}
	/**
	 * Writes the nodes the parser finds to the new file
	 * Differentiates between containers (ie. top) and keywords, comments 
	 * and just text.
	 * @param node the node to get the contents of
	 * @param writer the file writer that has been opened
	 */
	// this is a recursive function to traverse the document tree
	private void NodeDetails (Node node, Writer writer) {
		String Content = "";
		int type = node.getNodeType(); //get node type
		String name = node.getNodeName(); //get the node name
		if (type == Node.ELEMENT_NODE) {
			//if the name is top, inc counter and writer [top] to file
			if (name.equals("top")) {
				counter=1;
				try{
					writer.write ("\n["+node.getNodeName()+"]" +"\n");
				} catch (Exception e) {
					System.out.println(e);
				}
			} else if (counter ==1&& node.hasChildNodes() && node.getParentNode().getParentNode().getNodeName().equals("CDPlusPlus_Builder_Version_1.0.0")){
				try{
					writer.write (node.getNodeName() +" :" );
				} catch (Exception e) {
					System.out.println(e);
				}	
			//if name is any of the keywords, write the keyword and : in the file		//
			} else if (counter == 1){
				try{
					writer.write ("\n["+node.getNodeName()+"] \n");
				} catch (Exception e) {
					System.out.println(e);
				}
			
			//if the first line isn't top then it's a comment node 	
			} else if(counter == 0 && !(name.equals("comment"))) {
				try{
					writer.write ("%"+node.getNodeName()+"\n");
				} catch (Exception e) {
					System.out.println(e);
				}
			//a comment node
			} else if (name.equals("comment")) {
				try{
					writer.write ("%");	
				} catch (Exception e) {
					System.out.println(e);
				}
				
			}
		} else if (type == Node.COMMENT_NODE) {
			// check if comment node and print value
			Content = node.getNodeValue();
			if (!Content.trim().equals("")){
				try{
					writer.write("% ");
				} catch (Exception e) {
					System.out.println(e);
				}
				
			}
		}
		// check if current node has any children
		NodeList children = node.getChildNodes();
		if (children != null) {
			// if it does, iterate through the collection
			for (int i=0; i< children.getLength(); i++) {
				PrintChild(children.item(i),writer); //write to file all the child nodes
				NodeDetails(children.item(i), writer);
			}
		}
	}
}