Thread: XML DOM Parser problem

I have written the following java code for an XML Parser :

import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
 
public class XMLParser
{
	int i, j;
	private final static String xmlFileName = "/home/kanishk/Desktop/SE/mini proj/sample.xml";
	public void XMLSearch()
	{
		try{
		System.out.println("sapsap");
		File file = new File(xmlFileName);
		int flag = 0;
		if (file.exists())
		{
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder parser = factory.newDocumentBuilder();
			Document doc = parser.parse(xmlFileName);
			BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      			System.out.print("Enter search data: ");
      			String str = bf.readLine();
      			NodeList nl = doc.getElementsByTagName("*");
      			for(i=0;i<nl.getLength();i++)
      			{
      				if(nl.item(i).hasChildNodes())
      				{
      					if(nl.item(i).hasAttributes())
      					{
      						NamedNodeMap nnm = nl.item(i).getAttributes();
      						for(j=0;j<nnm.getLength();j++)
      						{
      							Attr a = (Attr)nnm.item(j);
      							if(str.equals(a.getValue()))
      							{
      								System.out.println("Search Data found");
      								flag = 1;
      							}
      						}
      					}
      					Node ch;
      					for(ch=nl.item(i).getFirstChild();ch!=null;ch=ch.getNextSibling())
      					{
      						if(ch.getNodeType()==Node.TEXT_NODE || ch.getNodeType()==Node.ATTRIBUTE_NODE)
      						{
      							if(ch.getNodeType()==Node.TEXT_NODE)
      							{
      								if(str.equals(ch.getNodeValue()))
      								{
      									System.out.println("Search Data found");
      									flag = 1;
      								}
      							}
      						}
      					}
      				}
      			}
      			if(flag==0)
      				System.out.println("Data Not Found");
      		}
      		else
      			System.out.println("File doesnt exist");
      		}
      		catch(Exception e){
      		System.out.println(e);}
      	}
      	public void XMLModify(int k)
      	{
      		try{
      		File file = new File(xmlFileName);
      		if (file.exists())
		{
			if(k==1)
			{
				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter parent node: ");
      				String str = bf.readLine();
      				BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter element name: ");
      				String str1 = bf1.readLine();
      				bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Give an element value(yes or no)?: ");
      				String str2 = bf1.readLine();
      				Node n1 = doc.createElement(str1);
      				NodeList nl = doc.getElementsByTagName(str);
      				for(j=0;j<nl.getLength();j++)
      				{
      					nl.item(j).appendChild(n1);
      					if(str2.equals("yes"))
      					{
      						bf1 = new BufferedReader(new InputStreamReader(System.in));
      						System.out.println("Enter element value: ");
      						String str3 = bf1.readLine();
      						Text txt = doc.createTextNode(str3);
      						n1.appendChild(txt);
      					}
      				}
      				storedata(doc);
      			}
      			if(k==2)
      			{
      				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
      				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter attribute node: ");
      				String str = bf.readLine();
      				BufferedReader bf2 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter attribute value: ");
      				String str2 = bf2.readLine();
      				BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.print("Enter element name to which attribute should be added: ");
      				String str1 = bf1.readLine();
      				NodeList nl = doc.getElementsByTagName(str1);
      				for(j=0;j<nl.getLength();j++)
      				{
      					Element e = (Element)nl.item(j);
      					e.setAttribute(str,str2);
      				}
      				storedata(doc);
      			}
      			if(k==3)
      			{
      				Node n;
      				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
      				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter element to be replaced: ");
      				String str = bf.readLine();
      				BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.print("Enter new element: ");
      				String str1 = bf1.readLine();
      				bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Give an element value(yes or no)?: ");
      				String str2 = bf1.readLine();
      				n = doc.createElement(str1);
      				//Element e = doc.createElement(str);
      				NodeList nl = doc.getElementsByTagName(str);
      				for(j=0;j<nl.getLength();j++)
      				{
      					Node n1 = nl.item(j).getParentNode();
      					n1.removeChild(nl.item(j));
      					Node n2 = n1.appendChild(n);
      					if(str2.equals("yes"))
      					{
      						bf1 = new BufferedReader(new InputStreamReader(System.in));
      						System.out.println("Enter element value: ");
      						String str3 = bf1.readLine();
      						Text txt = doc.createTextNode(str3);
      						n2.appendChild(txt);
      					}
 
      				}
      				storedata(doc);
      			}
      			if(k==4)
      			{
      				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
      				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter attribute to be replaced: ");
      				String str = bf.readLine();
      				BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.print("Enter new attribute: ");
      				String str1 = bf1.readLine();
      				BufferedReader bf2 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.print("Enter new attribute value: ");
      				String str2 = bf2.readLine();
      				NodeList nl = doc.getElementsByTagName("*");
      				for(j=0;j<nl.getLength();j++)
      				{
      					Element e = (Element)nl.item(j);
      					if(e.hasAttribute(str))
      					{
      						e.removeAttribute(str);
      						e.setAttribute(str1,str2);
      					}
      				}
      				storedata(doc);
      			}
      			if(k==5)
      			{
      				Node n;
      				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
      				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter element to be removed: ");
      				String str = bf.readLine();
      				NodeList nl = doc.getElementsByTagName(str);
      				for(j=0;j<nl.getLength();j++)
      				{
      					n = nl.item(j).getParentNode();
      					if(n!=null)
      						n.removeChild(nl.item(j));
      					else
      						System.out.println("Element not present in file");
      				}
      				storedata(doc);
      			}
      			if(k==6)
      			{
      				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
      				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter attribute to be removed: ");
      				String str = bf.readLine();
      				NodeList nl = doc.getElementsByTagName("*");
      				for(j=0;j<nl.getLength();j++)
      				{
      					Element e = (Element)nl.item(j);
      					if(e.hasAttribute(str))
      						e.removeAttribute(str);
      				}
      				storedata(doc);
      			}
      			if(k==7)
      			{
      				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
      				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter element whose value is to be updated: ");
      				String str = bf.readLine();
      				BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.print("Enter new value: ");
      				String str1 = bf1.readLine();
      				NodeList nl = doc.getElementsByTagName(str);
      				for(j=0;j<nl.getLength();j++)
      				{
      					if(nl.item(j).hasChildNodes())
      					{
      						NodeList nl1 = nl.item(j).getChildNodes();
      						for(i=0;i<nl1.getLength();i++)
      						{
      							if(nl1.item(i).getNodeType()==Node.TEXT_NODE);
      								nl1.item(i).setNodeValue(str1);
      						}
      					}
      					else
      						System.out.println("Element has no value");
      				}
      				storedata(doc);
      			}
      			if(k==8)
      			{
      				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder parser = factory.newDocumentBuilder();
				Document doc = parser.parse(xmlFileName);
      				BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
      				System.out.println("Enter attribute whose value is to be updated: ");
      				String str = bf.readLine();
      				BufferedReader bf1 = new BufferedReader(new InputStreamReader(System.in));
      				System.out.print("Enter new value: ");
      				String str1 = bf1.readLine();
      				NodeList nl = doc.getElementsByTagName("*");
      				for(j=0;j<nl.getLength();j++)
      				{
      					Element e = (Element)nl.item(j);
      					if(e.hasAttribute(str))
      					{
      						e.removeAttribute(str);
      						e.setAttribute(str,str1);
      					}
      				}
      				storedata(doc);
      			}
      		}
      		}
      		catch(Exception e){
      		System.out.println(e);}
      	}
      	private String nodevalue(Node n)
      	{
        	Node ch;
        	if(n!=null)
        	{
             		if (n.hasChildNodes())
             		{
                 		for(ch = n.getFirstChild();ch != null;ch = ch.getNextSibling())
                 		{
                     			if(ch.getNodeType() == Node.TEXT_NODE)
                         			return ch.getNodeValue();
                 		}
             		}
         	}
         	return "";
     	}
      	public void XMLDisplay(Node n,int in)
      	{
      		File file = new File(xmlFileName);
      		if (file.exists())
      		{
        		String nn = n.getNodeName();
        		String str = nodevalue(n);
         		NamedNodeMap nnm = n.getAttributes();
         		System.out.println(indentspc(in) + "NodeName: " + nn + ", NodeValue: " + str);
         		if(nnm!=null)
         		{
         			for (int i = 0; i < nnm.getLength(); i++)
         			{
                			Node n1 = nnm.item(i);
              				System.out.println(indentspc(in + 2) + "AttributeName: " + n1.getNodeName() + ", attributeValue: " + n1.getNodeValue());
         			}
         		}
         		if(n.hasChildNodes())
         		{
         			NodeList ch = n.getChildNodes();
         			for (int i = 0; i < ch.getLength(); i++)
         			{
             				Node ch1 = ch.item(i);
             				if (ch1.getNodeType() == Node.ELEMENT_NODE)
                		 		XMLDisplay(ch1,in + 2);
         			}
         		}
     		}
     		else
     			System.out.println("File doesnt exist");
     	}
     	private String indentspc(int in)
     	{
        	StringBuffer buffer = new StringBuffer();
         	for (int i = 0; i < in; i++)
             		buffer.append(" ");
         	return buffer.toString();
     	}
     	private void storedata(Document doc)
     	{
     		try{
     		TransformerFactory trans = TransformerFactory.newInstance();
		Transformer t = trans.newTransformer();
        	//StringWriter sw = new StringWriter();
        	//StreamResult r = new StreamResult(sw);
        	Node n = doc.getDocumentElement();
        	Source src = new DOMSource(n); 
        	Result dest = new StreamResult(System.out);
        	t.transform(src, dest);
        	/*DOMSource s = new DOMSource(doc);
        	t.transform(s,r);
        	String str = sw.toString();
        	OutputStream f;
		byte buf[] = str.getBytes();
		f = new FileOutputStream("connections.xml");
		for(int i=0;i<buf.length;i++)
	   		f.write(buf[i]);
		f.close();
		buf = null;*/
		}
     		catch(Exception e){
      		System.out.println(e);}
	}
     	public XMLParser()
     	{
     		try{
     		int x;
     		System.out.println("1. Search for data in XML file");
     		System.out.println("2. Modify data in XML file");
     		System.out.println("3. Display contents of XML file");
     		BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
     		System.out.print("Choose one of the three possibilities(1, 2, 3) : ");
      		x = Integer.parseInt(bf.readLine());
      		if(x==1)
      			XMLSearch();
      		if(x==2)
      		{
      			int y;
      			System.out.println("1. Add Element");
      			System.out.println("2. Add Attribute");
      			System.out.println("3. Replace Element");
      			System.out.println("4. Replace Attribute");
      			System.out.println("5. Remove Element");
      			System.out.println("6. Remove Attribute");
      			System.out.println("7. Modify Element Value(If value present)");
      			System.out.println("8. Modify Attribute Value");
      			bf = new BufferedReader(new InputStreamReader(System.in));
      			System.out.println("Choose one of the given modification possibilities(1, 2, 3, 4, 5, 6, 7, 8) : ");
      			y = Integer.parseInt(bf.readLine());
      			switch(y)
      			{
      				case 1: XMLModify(1);break;
      				case 2: XMLModify(2);break;
      				case 3: XMLModify(3);break;
      				case 4: XMLModify(4);break;
      				case 5: XMLModify(5);break;
      				case 6: XMLModify(6);break;
      				case 7: XMLModify(7);break;
      				case 8: XMLModify(8);break;
      				default: System.out.println("Invalid Selection");break;
      			}
      		}
      		if(x==3)
      		{
      			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder parser = factory.newDocumentBuilder();
			Document doc = parser.parse(xmlFileName);
      			Node root = doc.getDocumentElement();
      			XMLDisplay(root,0);
      		}
      		}
      		catch(Exception e){
      		System.out.println("sasasaas123");
      		System.out.println(e);}
      	}
      	public static void main(String args[])
      	{
      		new XMLParser();
      	}
}

and iam parsing the following xml file :

<?xml version="1.0"?>
<catalog>
   <product description="Cardigan Sweater" product_image="cardigan.jpg">
      <catalog_item gender="Men's">
         <item_number>QWZ5671</item_number>
         <price>39.95</price>
         <size description="Medium">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
         </size>
         <size description="Large">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
         </size>
      </catalog_item>
      <catalog_item gender="Women's">
         <item_number>RRX9856</item_number>
         <price>42.50</price>
         <size description="Small">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
         </size>
         <size description="Medium">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
            <color_swatch image="black_cardigan.jpg">Black</color_swatch>
         </size>
         <size description="Large">
            <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
            <color_swatch image="black_cardigan.jpg">Black</color_swatch>
         </size>
         <size description="Extra Large">
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
            <color_swatch image="black_cardigan.jpg">Black</color_swatch>
         </size>
      </catalog_item>
   </product>
</catalog>

and when iam trying to modify the file(by adding the element color_divide with the value yes and parent node as color_swatch) iam getting the following file as output :

<?xml version="1.0"?>
<catalog>
   <product description="Cardigan Sweater" product_image="cardigan.jpg">
      <catalog_item gender="Men&apos;s">
         <item_number>QWZ5671</item_number>
         <price>39.95</price>
         <size description="Medium">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
         </size>
         <size description="Large">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
         </size>
      </catalog_item>
      <catalog_item gender="Women&apos;s">
         <item_number>RRX9856</item_number>
         <price>42.50</price>
         <size description="Small">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
         </size>
         <size description="Medium">
            <color_swatch image="red_cardigan.jpg">Red</color_swatch>
            <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
            <color_swatch image="black_cardigan.jpg">Black</color_swatch>
         </size>
         <size description="Large">
            <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
            <color_swatch image="black_cardigan.jpg">Black</color_swatch>
         </size>
         <size description="Extra Large">
            <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
            <color_swatch image="black_cardigan.jpg">Black<color_divide>yesyesyesyesyesyesyesyesyesyesyesyesyesyes</color_divide></color_swatch>
         </size>
      </catalog_item>
   </product>
</catalog>

please help me out here.........i want color_divide to be added to each instance of color_swatch ........not only to the last one.........and with only 1 yes as the value each time.......