Sorting a datatable with a boolean value

Hi all,
I have a datatable and one of the columns is just a true or false field.
I'm using the DTOComparator from the BalusC (here: http://balusc.xs4all.nl/srv/dev-jep-dat.html) server but I'm getting the error:
Error 500: java.lang.RuntimeException: Getter getInclude cannot be invoked.
It comes from this line of code:
try {
            c1 = (Comparable) o1.getClass().getMethod(getter, null).invoke(o1, null);
            c2 = (Comparable) o2.getClass().getMethod(getter, null).invoke(o2, null);
        } catch (Exception e) {
            // Obvious. Check if method names are correct.
            throw new RuntimeException("Getter " + getter + " cannot be invoked.");
Can you not use boolean values with this?
Thanks for any help!
Illu

Instead of a primivive, use a wrapper objects as DTO property which represents a DB entry. Remember, DB2 fields can contain null values.
So use Boolean instead of boolean. Or just change the comparator to make it compatible with primitives.

Similar Messages

F:selectItems with default boolean value

Hi!
I have problem with using tag f:selectItems. I wrote converter in order to connect my items from the ManyChecbox list directly with my objects instead of strings. Now i would like to connect boolean values with my backing bean, so that when the page is rendered the default choice is marked. How can i do this?
<h:selectManyCheckbox value="#{myBean.selectedItems}" converter="MyConverter" >
<f:selectItems value="#{myBean.allItems}"/>
</h:selectManyCheckbox>

well the component is linked to your backing bean property 'myBean.selectedItems', which is probably a list or something. Whatever value in this list is true will be checked, so make the 'default' one true when you initially create the list (for example, in a @PostConstruct annotated method).

Sort Internal tbale with fiel;d values

Hi All
I have to sort an internal based on values of field . in the below order of value
CTP
HPL
SPL
ANC.
Wolud like know to if theres a better method of doing than what I did below in an user exit .
DATA : t_ltap_vb_temp TYPE ltap_vb OCCURS 0 WITH HEADER LINE .
*Need to sort ltap_vb with letyp value in order of 'CTP' , 'HPL' ,'SPL' , 'ANC'
*could not find a better logic
break kollav.
LOOP AT t_ltap_vb WHERE letyp = 'CTP'.
APPEND t_ltap_vb TO t_ltap_vb_temp.
DELETE t_ltap_vb.
ENDLOOP.
LOOP AT t_ltap_vb WHERE letyp = 'HPL'.
APPEND t_ltap_vb TO t_ltap_vb_temp.
DELETE t_ltap_vb.
ENDLOOP.
LOOP AT t_ltap_vb WHERE letyp = 'SPL'.
APPEND t_ltap_vb TO t_ltap_vb_temp.
DELETE t_ltap_vb.
ENDLOOP.
LOOP AT t_ltap_vb WHERE letyp = 'ANC'.
APPEND t_ltap_vb TO t_ltap_vb_temp.
DELETE t_ltap_vb.
ENDLOOP.
LOOP AT t_ltap_vb.
APPEND t_ltap_vb TO t_ltap_vb_temp.
ENDLOOP.
t_ltap_vb[] = t_ltap_vb_temp[].
Any alternative suggestions will be great .
Thanks
Vinay
Edited by: vinay kolla on May 20, 2009 11:21 AM

Hi Vinay,
Use the below code.
DATA: BEGIN OF itab1 OCCURS 0,
       fld(3) TYPE c,
      END OF itab1.
DATA: itab2 LIKE itab1 OCCURS 0 WITH HEADER LINE,
      itab_final LIKE itab1 OCCURS 0 WITH HEADER LINE.
itab1-fld = 'CTP'.
APPEND itab1.
itab1-fld = 'SPL'.
APPEND itab1.
itab1-fld = 'HPL'.
APPEND itab1.
itab1-fld = 'ANC'.
APPEND itab1.
itab1-fld = 'HPL'.
APPEND itab1.
itab1-fld = 'ANC'.
APPEND itab1.
itab1-fld = 'CTP'.
APPEND itab1.
itab1-fld = 'SPL'.
APPEND itab1.
itab1-fld = 'ANC'.
APPEND itab1.
itab1-fld = 'CTP'.
APPEND itab1.
itab1-fld = 'SPL'.
APPEND itab1.
itab2 [ ] = itab1[ ].
delete itab1 where fld = 'ANC'.
sort itab1 by fld.
delete itab2 where NOT fld = 'ANC'.
sort itab2 by fld.
append lines of itab1 to itab_final.
append lines of itab2 to itab_final.
LOOP AT itab_final.
WRITE:/ itab_final-fld.
ENDLOOP.
Regards,
Kumar Bandanadham

How to display result set boolean value as a check box

Hi guys,
I am getting the data which include boolean from the database, i need to display the boolean values as check box, see my code, its displaying the data into the table with the boolean values as true and false, how to make it in check boxes
package swing2.org;
import java.awt.GridBagLayout;
import javax.swing.JPanel;
import java.awt.Color;
import javax.swing.BorderFactory;
import javax.swing.border.BevelBorder;
import javax.swing.table.AbstractTableModel;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.ComponentOrientation;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
public class Panel2 extends JPanel {
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          gridBagConstraints.fill = GridBagConstraints.BOTH;
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          gridBagConstraints.weighty = 1.0;
          gridBagConstraints.gridx = 0;
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abstract class ResultSetTableModel extends AbstractTableModel
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   private ResultSet rs;
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class CachingResultSetTableModel extends ResultSetTableModel
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add a
public Class getColumnClass(int col) {
     return getValueAt(0, col).getClass();
}in your ResultSetTableModel which extends AbstractTableModel.
A simple example
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
public class SimpleDemo extends JFrame {
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        createAndShowUI();
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            return data[rowIndex][columnIndex];
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            return columnName.length;
        public Class getColumnClass(int c) {
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    public static void main(String[] args){
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}

How to create a Dynamic Datatable with sorting functioanlity

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Hi,
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How to get selected values from datatable with paging

hi all
here is my problem
I have a datatable with paging size of 2 and first column as checkbox.
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Cell with boolean value not rendering properly in Swing (custom renderer)

Hello All,
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import java.awt.Dimension;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.logging.Logger;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
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* @author josevnz
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import java.awt.Component;
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} // end classBut the rendering comes all wrong (a String saying true or false, not the expected checkbox from the default renderer) and also there is a weird flickring effect as this particular boolean column is editable (per table model, not show here)...
I can post the table model and the other renderer if needed (didn't want to put too much code on the question, at least initiallty).
Should I render a checkbox myself for this cell in the custom renderer? I'm puzzled as I expected the default renderer part of the code to do this for me instead.
Thanks!
Edited by: josevnz on Apr 14, 2009 12:35 PM
Edited by: josevnz on Apr 14, 2009 12:37 PM

camickr
Thats because the default render is a JLabel and it just displays the text from the toString() method of the Object in the table model.What I meant to say is that I expected the JCheckbox not a String representation of the boolean value.
Thats because a different renderer is used depending on the Class of data in the column. Look at the source code for the JTable class to see what the "default >renderer for the Boolean class" is. Then you can extend that or if its a private class then you will need to copy all the code and customize it.At the end I looked at the code and replicated the functionality I needed. I thought than maybe there was a way to avoid replicating the same logic all over again in order to implement this functionality. Good advice, though.
see you learned nothing from your last posting. This is NOT a SSCCE. 90% of the code you posted is completely irrelevant for the described problem. There is abosutelly no need to post the custom TableModel, because there is no need to use a custom TableModel for this problem. The TableModel has nothing to do with how a column is rendererd.The custom table model returns the type of the column (giving a hint to the renderer on what to expect, right?) and for the one that had a problem it says than the class is Boolean. That's why I mentioned it:
public Class getColumnClass(int columnIndex) {
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You also posted data for 4 columns worth of data. Again, irrelevant. Your question is about a single column containing Boolean data, so forget about the other columns.
When creating a SSCCE you don't start with your existing code and "remove" code. You start with a brand new class and only add in what is important. That way hopefully if you made a mistake the first time you don't repeat it the second time.That's what I did, is not the real application. I copy & pasted code in a haste from this dummy program on this forum, not the best approach as it gave the wrong impression.
Learn how to write a proper SSCCE if you want help in the future. Point taken, but there is NO need for you to be rude. Your help is appreciated.
Regards,
Jose.

Sorting table combine with Assending n DESCENDING value

Dear All ...
i want to sort by table with some field. which some of the field in assending n some in desending.
example: this my table itab .
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after sort become
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           1.1.09       a          H
           1.1.09       c          S
           1.1.09       c         H
from above sample ....... 1st n 2nd value is sort in assending , but 3th sort in desending ....
any idea ?

Hi,
Try this,
DATA: BEGIN OF itab OCCURS 0,
        f1(15) TYPE c,
        f2(15) TYPE c,
        f3(15) TYPE c,
      END OF itab.
itab-f1 = 1.
itab-f2 = 'a'.
itab-f3 = 'H'.
APPEND itab.
itab-f1 = 1.
itab-f2 = 'c'.
itab-f3 = 'H'.
APPEND itab.
itab-f1 = 1.
itab-f2 = 'c'.
itab-f3 = 'S'.
APPEND itab.
itab-f1 = 1.
itab-f2 = 'a'.
itab-f3 = 'S'.
APPEND itab.
SORT itab by f1 f2 f3 DESCENDING.
LOOP AT itab.
WRITE:/ itab-f1, itab-f2, itab-f3.
ENDLOOP.

JXPath with boolean value

Hi,
I want to know if JXPath support boolean value or not, and how to do.Because if i try to get the value of a bollean attribute with the getValue(..) method, it does'nt work..
Thanks

Hi,
This forum is dedicated to JMX.
You're asking a question about JXPath, which is not even closely related to the technology this forum is about.
Maybe someone reading your post will have an answer for you, but it would be sheer luck.
Maybe this link will have the answer you're looking for:
http://today.java.net/pub/a/today/2006/08/03/java-object-querying-using-jxpath.html
If not you could try to google search for JXPath, or try to find a better suited forum here:
http://forum.java.sun.com/index.jspa?tab=java
Hope this helps,
-- daniel
http://blogs.sun.com/jmxetc

Using an event structure to reset a boolean control with ring menu value change

I am trying to get two boolean buttons to reset when the value of a ring menu changes. For this I am using an event structure set to execute with a ring value change. However I have other code that needs to be executing while the event structure waits for the value change. I place my event structure inside the while loop the buttons reset as expected but my other code does not run (except at the moment of value change). If I place it outside the loop the rest of the code functions as expected but the buttons do not reset. Any help you can offer is much appreciated.
Solved!
Go to Solution.
Attachments:
event structure reset.vi ‏11 KB

try this
Attachments:
event structure reset_edit.vi ‏14 KB

Java & Acces: pass boolean values

Ok I'm totally new at this so the following text will hopefully be understandable. I hope you guys can give me a hand over here.
The case:
I'm making a java function that has to create a new user of my database. This user is supposed to get a name, a password and can have 4 functions (Administrator, Author, Reader, Coreader).
To identify the 4 functions i used a checkbox in my database. So when the box is checked the person is a Admin/author/... Now I was wondering how i can use Java (using a query) to set these values checked or non-checked.
I thought I'd use booleans, however, my compiler says there is a General Error (all the names of the columns are right, so that's not the deal, my database is working properly and such, ...)
So here's my code:
(note that i used these marks ' ' here for the booleans, i tried all kinds of things such as dropping them, using them, ... it doesn't seem the problem...)
public void addNewUser(String username, String password, boolean admin, boolean author, boolean reader, boolean coreader)
String query1 = "UPDATE user SET username = '" + username + "' AND password = '"
+ password + "' AND administrator = '" + admin + "' AND author ='" + author
+ "' AND reader ='" + reader + "' AND coreader ='" + coreader + "'";
try
stmt = global.createStatement();
stmt.executeUpdate(query1);
global.showMessage("The new user, " + username + ", has been added successfuly", "Succesfuly added");
catch(Exception e)
global.showError("An error has occured while connecting to the database" + e.toString(), "SQL Error");
finally
global.closeConnection();
Hope you guys can help. Thanks a lot!

It's possible to do this; it's just that your SQL syntax is completely wrong. An SQL UPDATE statement looks as follows:
UPDATE table SET column1 = value1, column2 = value2, column3 = value3 WHERE expression
You're using 'AND' instead of commas, which is the first thing that goes wrong. The second thing that goes wrong is that you're building the SQL statement from bits of string and values. This is a habit that many novice programmers use, and open the door wide for SQL injection attacks. I you do this sort of thing on a web site, you could end up with your customers' credit card details being exposed.
But because you're just passing the boolean values into the string, they get expanded to a string value, hence TRUE or FALSE. However, because they are string literals, they should be surrounded by single quotes.
This brings us to the third problem: you're using an UPDATE statement to insert a new record. Use an INSERT statement instead.
It would be better to use a PreparedStatement. In this case, your code would look as follows:
PreparedStatement stmt =
    global.prepareStatement( "INSERT INTO user " +
            "( username, password, administrator, author, reader, coreader ) " +
            "VALUES ( ?, ?, ?, ?, ?, ? )" );
    stmt.setString( 1, username );
    stmt.setString( 2, password );
    stmt.setBoolean( 3, admin );
    stmt.setBoolean( 4, author );
    stmt.setBoolean( 5, reader );
    stmt.setBoolean( 6, coreader );I have no idea whether this will work: I don't know Access, and booleans are not a standard feature of SQL. I also don't know whether Microsoft have created their own flavour of SQL, as they are wont to do with any standard.
All in all, though, you have to really work on your SQL. Three major mistakes in such a simple piece of code means that you don't understand SQL syntax. You may copy and paste this for your assignment, but unless you understand what you're actually doing, you're going to run into trouble again very soon.
- Peter

Bug : Datatable with disabled checkboxes

Hello,
I was able to implement a datatable with modify, delete links for each row.
The following code works:
<h:data_table id="DataTable" value="#{DataScreen.records}" var="record">
<h:column>
     <f:facet name="header"><h:output_text value=" " /></f:facet>
     <h:command_link action="#{DataScreen.modifyAction}">
       <h:output_text value="#{DataScreen.modifyLabel" />
     </h:command_link>
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
<h:column>
     <f:facet name="header"><h:output_text value=" " /></f:facet>
     <h:command_link action="#{DataScreen.deleteAction}">
       <h:output_text value="#{DataScreen.deleteLabel" />
     </h:command_link>
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
<h:column>
     <f:facet name="header"><h:output_text value="Column1_Header" /></f:facet>
     <h:output_text value="#{DataScreen.column1}" />
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
<h:column>
     <f:facet name="header"><h:output_text value="Column2_Header" /></f:facet>
     <h:output_text value="#{DataScreen.column2}" />
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
</h:data_table>But, I added a third column of type boolean, which is displayed as a disabled checkbox.
The table is displayed properly in the browser. But, when I click on the modify, delete links,
the corresponding action method (DataScreen.modifyAction() or DataScreen.deleteAction())
is not called.
<h:data_table id="DataTable" value="#{DataScreen.records}" var="record">
<h:column>
     <f:facet name="header"><h:output_text value=" " /></f:facet>
     <h:command_link action="#{DataScreen.modifyAction}">
       <h:output_text value="#{DataScreen.modifyLabel" />
     </h:command_link>
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
<h:column>
     <f:facet name="header"><h:output_text value=" " /></f:facet>
     <h:command_link action="#{DataScreen.deleteAction}">
       <h:output_text value="#{DataScreen.deleteLabel" />
     </h:command_link>
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
<h:column>
     <f:facet name="header"><h:output_text value="Column1_Header" /></f:facet>
     <h:output_text value="#{DataScreen.column1}" />
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
<h:column>
     <f:facet name="header"><h:output_text value="Column2_Header" /></f:facet>
     <h:output_text value="#{DataScreen.column2}" />
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
<h:column>
     <f:facet name="header"><h:output_text value="Column3_Header" /></f:facet>
     <h:selectboolean_checkbox value="#{DataScreen.column3}" disabled="true" />
     <f:facet name="footer"><h:output_text value=" " /></f:facet>
</h:column>
</h:data_table>I would be glad to know if there is any workaround.
Thanks,
Ajay

I forgot to mention that there is no error message in the log file. The same page is displayed again
after clicking on the Modify or Delete Link.
If I remove the third column (disabled checkbox), the modify and delete links work fine.

How to use Boolean values from 2 different sources to stop a while loop?

I am working on a program for homework that states E5.4) Using a single Whil eLoop, construct a VI that executes a loop N times or until the user presses a stop button. Be sure to include the Time Delay Exress Vi so the user has time to press the stop botton.
I am doing this right now but it seems as though I can only connect one thing to the stop sign on th while loop. It won't let me connect a comparision of N and the iterations as well as the stop button to the stop sign on the while loop. So how would I be able to structure it so that it stops if it receives a true Boolean value from either of the 2 sources (whichever comes first)?
Basically, I cannot wire the output of the comparison of N and iterations as well as the stop button to the stop button on the whlie loop to end it. Is there a solution?
Thanks!
Solved!
Go to Solution.

Rajster16 wrote:
Using a single Whil eLoop, construct a VI that executes a loop N times or until the user presses a stop button.
Look in the boolean palette for something similar to the word hightlighted in red above.
LabVIEW Champion . Do more with less code and in less time .

How to create dynamic DataTable with dynamic header/column in JSF?

Hello everyone,
I am having problem of programmatically create multiple DataTables which have different number of column? In my JSF page, I should implement a navigation table and a data table. The navigation table displays the links of all tables in the database so that the data table will load the data when the user click any link in navigation table. I have gone through [BalusC's post|http://balusc.blogspot.com/2006/06/using-datatables.html#PopulateDynamicDatatable] and I found that the section "populate dynamic datatable" does show me some hints. In his code,
// Iterate over columns.
        for (int i = 0; i < dynamicList.get(0).size(); i++) {
            // Create <h:column>.
            HtmlColumn column = new HtmlColumn();
            dynamicDataTable.getChildren().add(column);
            // Create <h:outputText value="dynamicHeaders"> for <f:facet name="header"> of column.
HtmlOutputText header = new HtmlOutputText();
header.setValue(dynamicHeaders[i]);
column.setHeader(header);
// Create <h:outputText value="#{dynamicItem[" + i + "]}"> for the body of column.
HtmlOutputText output = new HtmlOutputText();
output.setValueExpression("value",
createValueExpression("#{dynamicItem[" + i + "]}", String.class));
column.getChildren().add(output);
public HtmlPanelGroup getDynamicDataTableGroup() {
// This will be called once in the first RESTORE VIEW phase.
if (dynamicDataTableGroup == null) {
loadDynamicList(); // Preload dynamic list.
populateDynamicDataTable(); // Populate editable datatable.
return dynamicDataTableGroup;
I suppose the Getter method is only called once when the JSF page is loaded for the first time. By calling this Getter, columns are dynamically added to the table. However in my particular case, the dynamic list is not known until the user choose to view a table. That means I can not call loadDynamicList() in the Getter method. Subsequently, I can not execute the for loop in method "populateDynamicDataTable()".
So, how can I implement a real dynamic datatable with dynamic columns, or in other words, a dynamic table that can load data from different data tables (different number of columns) in the database at run-time?
Many thanks for any help in advance.

flyeminent wrote:
However in my particular case, the dynamic list is not known until the user choose to view a table. Then move the call from the getter to the bean's action method.

Error - '' is not a valid boolean value

I have been receiving the error message = '' is not a valid Boolean value quite frequently. It doesn’t matter which hierarchy I am in but it’s typically when I do an Add or Insert. When selecting ‘ok’ on the error message, I’m able to continue on with my work but was just curious what causes this error. Sometimes when this error shows up and I click ‘ok’, it will take me out of the DRM screen and into whatever else I may have open at the moment. Any thoughts or ideas? We are on version 11.1.1.2.103

As Murali stated-
It could be a property incorrectly configured, check all the boolean type properties and see if any of them are getting a string value by any chance.
Thanks
Denzz

Sorting a datatable with a boolean value

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