No offense, but I would prefer that this email address not be sent to.
Please delete references to it,
and use:
stargate7thsym...@live.co.uk
instead.
Also, I am a source for help with genuine problems/
code problems.
I am unfortunately not a source as a debugger!
:)
----- Original Message -----
From: "Thufir" <hawat.thu...@gmail.com>
To: <ecs-user@jakarta.apache.org>
Sent: Friday, February 27, 2009 9:29 PM
Subject: null pointer
Would there a be a better approach to this class?
It's just supposed to output a result set. however, since there has to
be an update mechanism, I figured that might as well be incorporated as
well.
One thing I notice is that there's no real need to extend table, so I
think I'm taking maybe a bad approach.
Also, I'm getting a null pointer error further down, commented in CAPS.
At first the data is good, then a null value. Oh, maybe the start of a
nonexistent column? Not sure.
import a00720398.util.EnumOfMethods;
import java.awt.Color;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.ecs.html.*;
public class SimpleResultSetTable extends Table {
private static final boolean isPretty = true;
private static final long serialVersionUID = 1L;
private TR tr = new TR();
private ResultSet resultSet = null;
private ResultSetMetaData resultSetMetaData = null;
private int colCount = 1;
private static Logger logger = Logger.getLogger
(SimpleResultSetTable.class.getName()); //Controller.class.getName()
private Form getDeleteButtonForm(int id) {
EnumOfMethods enumVal = EnumOfMethods.D;
String action = "/Assignment";
String method = "get";
Form form = new DeleteButtonForm(action, method, enumVal, id);
return form;
}
private void header() throws SQLException {
for (int i = 1; i <= colCount; i++) {
TH th = new TH();
th.setPrettyPrint(isPretty);
th.addElement(resultSetMetaData.getColumnName(i));
addElement(th);
}
}
private String getHex(Color color){
return Integer.toHexString(color.getRGB() & 0x00ffffff);
}
private Form getElementForm(){
Form form = new ElementForm();
return form;
}
private void data() throws SQLException {
resultSet.beforeFirst();
while (resultSet.next()) {
tr = new TR();
tr.setPrettyPrint(isPretty);
int i = resultSet.getRow();
Color color = (i % 2 == 0) ? Color.LIGHT_GRAY : Color.GRAY;
String colorString = getHex(color);
tr.setBgColor(colorString);
for (int j = 1; j <= colCount; j++) {
TD td = new TD();
td.setPrettyPrint(isPretty);
String element = resultSet.getString(j);//String.valueOf
(j); //
if (j == 1) {
int id = Integer.parseInt(element);
Form form = this.getDeleteButtonForm(id);
td.addElement(form);
} else {
//NULL POINTER ERROR RIGHT HERE
//I'M NOT SURE WHY ELEMENT IS LITERALLY NULL,
//BUT IT IS. THERE'S GOOD DATA AT FIRST, THEN
//A NULL VALUE
logger.log(Level.WARNING, "why null?\t" + element);
Form form = new ElementForm(element, 1,2);
//form.addElement(element);
td.addElement(form);
}
tr.addElement(td);
addElement(tr);
}
}
}
public SimpleResultSetTable(ResultSet rs) throws SQLException {
setBorder(1);
setPrettyPrint(isPretty);
resultSet = rs;
resultSetMetaData = rs.getMetaData();
colCount = resultSetMetaData.getColumnCount();
header();
data();
}
}
thanks,
Thufir
---------------------------------------------------------------------
To unsubscribe, e-mail: ecs-user-unsubscr...@jakarta.apache.org
For additional commands, e-mail: ecs-user-h...@jakarta.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: ecs-user-unsubscr...@jakarta.apache.org
For additional commands, e-mail: ecs-user-h...@jakarta.apache.org
