xml experts help me SAX Parser in xml

[naveena kamsali]

hi friends,

I am learning SAX in xml. I am getting ArrayIndexOutOfBound Exception. can anybody know how to rectify this.

//this is the program which iam doing

package com.sax;

import java.util.HashSet;
import java.util.Iterator;

import org.xml.sax.AttributeList;
import org.xml.sax.DocumentHandler;
import org.xml.sax.Parser;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.ParserFactory;

public class FindAllEmployees {
	String eno;
	String ele_name;
	boolean flag;
	Employee e;
	HashSet hs=new HashSet();
	public void startElement(String s,AttributeList al){
		if(flag)
			ele_name=s;
		else if(s.equals("emp")){
			flag=true;
			e=new Employee();
			e.setEmpno(al.getValue("empno"));
		}
	}
		
		public void characters(char c[],int i,int j)	throws SAXException{
			if(flag){
				if(ele_name.equals("firstname"))
					e.setFirstname(new String(c,i,j));
				else if(ele_name.equals("lastname"))
					e.setLastname(new String(c,i,j));
					else if(ele_name.equals("sal"))
					e.setSalary(new String(c,i,j));
					else if(ele_name.equals("desig"))
						e.setDesignation(new String(c,i,j));
			}//if
		}//chars
	public void endElement(String s){
		if(s.equals("emp"))
			flag=false;
		hs.add(e);
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub

		Parser p=ParserFactory.makeParser("org.apache.xerces.parsers.SAXParser");
		FindAllEmployees fae=new FindAllEmployees();
		fae.eno=args[0];
		p.setDocumentHandler((DocumentHandler) fae);
		p.parse("emp.xml");
		Iterator i=fae.hs.iterator();
		int count=1;
		while(i.hasNext())
		{
			Employee e=(Employee)i.next();
			System.out.println("employee"+count+"details............");
			e.displayDetails();
			count++;
		}

	}

}

//emp.xml file

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE emps SYSTEM "emp.dtd"> <emps> <emp empno="e101"> <name> <firstname>naveena</firstname> <lastname>kamsali</lastname> </name> <sal>1000</sal> <desig>manager</desig> <desc>this employee is manager for this department</desc> </emp> <emp empno="e102"> <name> <firstname>rahul</firstname> <lastname>dravid</lastname> </name> <sal>1000</sal> <desig>developer</desig> <desc>this employee is developer for this department</desc> </emp></emps>


//below is the dtd file

<!ELEMENT emps (emp+)> <!ELEMENT emp (name,sal,desig,desc)> <!ELEMENT name (firstname,lastname)> <!ELEMENT firstname (#PCDATA)> <!ELEMENT lastname (#PCDATA)> <!ELEMENT sal (#PCDATA)> <!ELEMENT desig (#PCDATA)> <!ELEMENT desc (#PCDATA)> <!ATTLIST emp empno ID #REQUIRED>

[Bear Bibeault]

Don't specify an index outside the bounds of the array.

[Paul Clapham]

The useful information for you now is the stack trace which tells you what line of code threw the exception. Have a look at that, then have a look at the line of code which it points to.

[naveena kamsali]

Paul Clapham wrote:The useful information for you now is the stack trace which tells you what line of code threw the exception. Have a look at that, then have a look at the line of code which it points to.

Parser p=ParserFactory.makeParser("org.apache.xerces.parsers.SAXParser");
FindAllEmployees fae=new FindAllEmployees();
fae.eno=args[0]; //here i got the exception can you please tell me how to solve this
p.setDocumentHandler((DocumentHandler) fae);

[William Brogden]

The variable args refers to command line arguments - you are trying to run without a command line argument giving the XML document location.


Note that this use of the characters method:

      public void characters(char c[],int i,int j)    throws SAXException{  
            if(flag){  
                if(ele_name.equals("firstname"))  
                    e.setFirstname(new String(c,i,j));  
                else if(ele_name.equals("lastname"))  
                    e.setLastname(new String(c,i,j));  
                    else if(ele_name.equals("sal"))  
                    e.setSalary(new String(c,i,j));  
                    else if(ele_name.equals("desig"))  
                        e.setDesignation(new String(c,i,j));  
            }//if  
        }//chars  

will fail unexpectedly because the characters method may not get the entire text at a single call.

Bill