date:20111031

GWT CELLTABLE: How to set column's cell value depending on changes in other column ?

2011-10-31 Thread vaibhav bhalke

Hi,

I have 3 column + 10 rows in celltable.
value1Column, value2Column, RecordState
 1 | 2 | *
 2 | 4 | -
:
:
3 | 5 | -
6 | 5 | *

Whenever user changes values either value1 or value2 then immediately cell
related to that record set to * in RecordState column.

How to set * in RecordState column on  value changes?

How to use setFieldUpdater to update values in column ?

value1Column.setFieldUpdater(new FieldUpdater() {
public void update(int index,
RecordVO object, integer value) {
//How to set * in RecordState column ?
}



-- 
Best Regards,
Vaibhav


 

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Re: Has anybody setup an owned Collection in RequestFactory? Does know how to set the ParentKey/ChildKey?

2011-10-31 Thread Patrick Julien

1. Well, the previous post has the link to the AppEngine JDO documentation 
on how to do that but it doesn't work in JPA the same way, more on that 
later in #4
2. You're right. I've been using gin for so long that I've forgotten about 
the setFactory method. The reason it works is not because of the class you 
pointed me too but this one here:

http://code.google.com/p/gwt-examples/source/browse/trunk/WalletInventory/src/com/gonevertical/client/app/ClientFactoryImpl.java

You're constructing your place tokenizers manually. You gain complete 
control of how you construct you tokenizers but at the expense of having to 
write the code yourself. In my code, I don't have anything implementing 
ApplicationPlaceHistoryMapper like you do, it's provided by gin.

However, now that i think about, gin should be able to do the same with 
ctor arguments provided the necessary Providers are in place

4. So you did:

@ElementCollection(targetClass=WalletItemData.class)
@CollectionTable(name="items")
@MapKey(name="key")
private List items; 

What you're asking for is exactly:

@OneToMany(mappedBy="items") // mappedBy is ignored on AppEngine
private List items;

and in WalletItemData:
@ManyToOne
private WalletData parent;

but @ManyToOne isn't supported on AppEngine

and what I think you're looking for is something with automatic management 
of the child's relationship which is:

@OneToMany(mappedBy="items", cascade=ALL) // mappedBy is ignored on 
AppEngine
private List items;

Now, from inside a transaction, any new object you put in items will be 
persisted, any modified object will be updated and anything removed from 
the collection will be automatically deleted. You never need to call merge, 
persist or remove on an EntityManager for any of these operations since 
this collection is already managed and known to the entity manager.

If you absolutely need to know your parent from the child, outside of it 
being present in the parent's collection that is, you do it exactly the way 
you did it by setting and managing the parent key manually. The difference 
is the object type will be of the key type instead of the actual parent 
type.

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Unit teting using GWTTestCase

2011-10-31 Thread Vish

I am getting following error when I tried to test using GWTTestCases.

com.google.gwt.junit.JUnitFatalLaunchException: The test class
'com.abc.myapp.client.MyAppTestCase' was not found in module
'com.abc.myapp.Myapp'; no compilation unit for that type was seen
at
com.google.gwt.junit.JUnitShell.checkTestClassInCurrentModule(JUnitShell.java:
743)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1346)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1309)
at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:653)
at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:
441)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:296)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at
org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:
91)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:
49)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:
38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:
390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:
197)

Here is the test class source code.

package com.abc.myapp.client;

import org.junit.Assert;
import com.google.gwt.junit.client.GWTTestCase;

public class MyAppTestCase extends GWTTestCase {
@Override
public String getModuleName() {
return "com.abc.myapp.Myapp";
}

public void testX(){
Assert.assertTrue(true);
}
}

In eclispe I am using following set up, it is as per maven standard.
src/main/java   for which output folder is target/classes
src/main/resources  for which output folder is target/classes
src/main/webapp
src/test/java   for which output folder is target/test-
classes
src/test/resources  for which output folder is target/test-
classes

Let me know if I am missing anything else.

FYI!, I am using GWT 2.3.

Thanks,

Vish

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Re: Has anybody setup an owned Collection in RequestFactory? Does know how to set the ParentKey/ChildKey?

2011-10-31 Thread Brandon Donnelson

Thanks for looking at my code. I wanted to follow up.

to 1. I was having problems with the implying the parent in the ownership,
so I had to do it manually. I have other projects where I use RPC and I
don't have to set the parent. For some reason I wasn't able to get it to
work in this codebase. I'll try again Thanks for noticing that.

to 2. I found you can have arguments in the tokenizer. The one you saw was
not really being used. Here is a better example:
http://code.google.com/p/gwt-examples/source/browse/trunk/WalletInventory/src/com/gonevertical/client/app/activity/places/WalletEditPlace.java

to 3. I'll have to try the editor driver. On the Todo list.

to 4. I wouldn't/don't mind using JPA, but I could not find a path of
success using the annotations to setup the Owned Collections annotations. I
tried everything I could think of and settled with this. I do like the
concise annotations in JPA although, when it came to Owned Collections in
App Engine it failed for me. If you look into the history, I tried twice on
this code base. Its most likely operator error.
This is the JPA version I
tried:
http://code.google.com/p/gwt-examples/source/browse/trunk/WalletInventory/src/com/gonevertical/server/domain/WalletData.java?r=2908

- no worky for me.

Do you know how to annotate owned Collections in JPA.

Thanks for looking through the code! :)

Brandon Donnelson
http://gwt-example.googlecode.com

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