How to check the values of view object?
Hi all,
I created a new view object by right clicking my application module. Now when I try to retrieve values
of the attributes of the view object I am getting null pointer exception. How do I check whether the view has
some values in it or not manually using select statement ? I try to find the view in my database at database navigator
but it was not there. Kindly help me out in this.
Thanks,
Phanindra.
Edited by: 887737 on Oct 19, 2011 12:53 AM
Hi,
Right click on application module(yourAM in model project) and press Run,Then you can confirm whether your ViewObject is working or not.
Note:
Generally create viewObject using EO based or Query based how did you create viewObject
See:
http://download.oracle.com/otn_hosted_doc/jdeveloper/1012/bc4j/intro/bc_avo.html
http://www.adftips.com/2010/09/adf-model-creating-view-object-vo.html
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import java.sql.*;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
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public static int index=0;
public static ResultSet rs;
public static Statement s;
public static Connection c;
public static Object cols[][];
private static JTable table;
private static JScrollPane scroller;
private static int flag=0;
public DeleteC()
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import java.awt.event.*;
import javax.swing.*;
import javax.swing.JOptionPane;
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Do this instead:
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handleIt(attributeName, attributeValue);
System.out.println(sb.toString());
private void handleIt(String attributeName, Object attributeValue) {
if (attributeValue != null) {
boolean isPrimitive = attributeValue.getClass().isPrimitive();
if (isPrimitive) {
sb.append("{" + attributeName + ":" + sizeOf(attributeValue) + "}");
} else {
sb.append("{" + attributeName + ":" + sizeOf(attributeValue) + "{");
Field[] fields = attributeValue.getClass().getDeclaredFields();
String name;
Object value = null;
int lim = fields.length;
for (int i = 0; i < lim; i++) {
name = fields.getName();
if (!name.endsWith("_VALUE") && !name.equals("SIZE") && !name.equals("serialVersionUID")) {
try {
value = fields[i].get(attributeValue);
} catch(Exception e) {
//PENDIENTE: Tratamiento excepción
handleIt(name, value);
sb.append("}");
private int sizeOf(Object obj) {
//Valid only for Serializables
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = null;
byte[] bytes = null;
try {
oos = new ObjectOutputStream(baos);
oos.writeObject(obj);
bytes = baos.toByteArray();
} catch(Exception e) {
//PENDIENTE: Tratamiento excepción
} finally {
if (oos != null) {
try {
oos.close();
} catch(Exception e) {
//PENDIENTE: Tratamiento excepción
if (baos != null) {
try {
baos.close();
} catch(Exception e) {
//PENDIENTE: Tratamiento excepción
int size = -1;
if (bytes != null) {
size = bytes.length;
return size;
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