[Middlegen-user] Middlegen 2.1 and an int and java.lang.Integer interface incompatibility

Discussion:

Terry W

2004-10-06 00:38:10 UTC

Hi, I'm new to Middlegen and I'm real excited to use it.

I am taking an existing MySQL 4.0 database from an opensource project,
Coppermine, and I am running Middlegen against it to see how to use
Middlegen.

I am having a problem where an interface expects a wrapper class but
it is receiving a primitive variable.

I've seen messages posted about modifying the Sql2Java.java class and
messages about foreign keys of one class are accidentally named the
same as a key in another class of a different type, or there abouts.

I really haven't seen a definitive answer to this question other than
modifying the Sql2Java.java class or modifying a velocity template
file. By the way, which I don't see where in Middlegen 2.1 where I
would modify the primitive to wrapper classes in the velocity files.

If there are some other early adopter of Middlegen 2.1 who have also
seen the same problem please let me know what the workaround was.

-Terry

.
</snip>
.
.
webdoclet:
[webdoclet] Generating web.xml.

compile-adapter:
[javac] Compiling 17 source files to
/home/terry/middlegen-2.1/samples/build/classes
[javac] /home/terry/middlegen-2.1/samples/build/gen-src/airline/adapter/StrutsCpg131AlbumDelegate.java:108:
findByVisibility(int) in airline.interfaces.Cpg131AlbumFacade cannot
be applied to (java.lang.Integer)
[javac]
retVals.addAll(airline.interfaces.Cpg131AlbumFacadeUtil.getHome().create().findByVisibility(cpg131AlbumForm.getVisibility()));
[javac]
.
.
</snip>
.
[javac] /home/terry/middlegen-2.1/samples/build/gen-src/airline/adapter/TranslatorUtil.java:453:
setParent(java.lang.Integer) in airline.web.struts.Cpg131CategoryForm
cannot be applied to (int)
[javac]
cpg131CategoryForm.setParent(cpg131CategoryPersistence.getParent());
[javac]
.
.
</snip>
.
[javac] 100 errors

BUILD FAILED

Ben Litchfield

2004-10-06 00:44:00 UTC

Permalink

Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.

Ben

Post by Terry W
Hi, I'm new to Middlegen and I'm real excited to use it.
I am taking an existing MySQL 4.0 database from an opensource project,
Coppermine, and I am running Middlegen against it to see how to use
Middlegen.
I am having a problem where an interface expects a wrapper class but
it is receiving a primitive variable.
I've seen messages posted about modifying the Sql2Java.java class and
messages about foreign keys of one class are accidentally named the
same as a key in another class of a different type, or there abouts.
I really haven't seen a definitive answer to this question other than
modifying the Sql2Java.java class or modifying a velocity template
file. By the way, which I don't see where in Middlegen 2.1 where I
would modify the primitive to wrapper classes in the velocity files.
If there are some other early adopter of Middlegen 2.1 who have also
seen the same problem please let me know what the workaround was.
-Terry
.
</snip>
.
.
[webdoclet] Generating web.xml.
[javac] Compiling 17 source files to
/home/terry/middlegen-2.1/samples/build/classes
findByVisibility(int) in airline.interfaces.Cpg131AlbumFacade cannot
be applied to (java.lang.Integer)
[javac]
retVals.addAll(airline.interfaces.Cpg131AlbumFacadeUtil.getHome().create().findByVisibility(cpg131AlbumForm.getVisibility()));
[javac]
.
.
</snip>
.
setParent(java.lang.Integer) in airline.web.struts.Cpg131CategoryForm
cannot be applied to (int)
[javac]
cpg131CategoryForm.setParent(cpg131CategoryPersistence.getParent());
[javac]
.
.
</snip>
.
[javac] 100 errors
BUILD FAILED
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Terry W

2004-10-06 12:58:30 UTC

Permalink

I will look into that. I see when I run ant with the gui [build]
button and a cmp2.0 frame below, the tables above with a gui select
drop down below, will choose only java wrapper classes for fields in
the database. I don't see any java primitives options in any of the
options in the drop down. I will keep trying.

btw, the airline.ear builds no problem.

I believe it is in the Struts build process that my type casting
problem exists.

it appears to be in the ..findByVisibility methods, and the TranslatorUtil class
-Terry

Post by Ben Litchfield
Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.
Ben

-------------------------------------------------------
This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
Use IT products in your business? Tell us what you think of them. Give us
Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
http://productguide.itmanagersjournal.com/guidepromo.tmpl
_______________________________________________
middlegen-user mailing list
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Terry W

2004-10-06 13:25:14 UTC

Permalink

I found the drop down with the primitive values for cmp2.0
persistence. I will test it out now.
-Terry

Post by Terry W
I will look into that. I see when I run ant with the gui [build]
button and a cmp2.0 frame below, the tables above with a gui select
drop down below, will choose only java wrapper classes for fields in
the database. I don't see any java primitives options in any of the
options in the drop down. I will keep trying.
btw, the airline.ear builds no problem.
I believe it is in the Struts build process that my type casting
problem exists.
it appears to be in the ..findByVisibility methods, and the TranslatorUtil class
-Terry

Post by Ben Litchfield
Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.
Ben

Terry W

2004-10-06 13:34:23 UTC

Permalink

I tested it out using primitive attributes for the primary keys but I
ran into another build problem during the build process for EJBs.

So, I'm returning back to getting the int and java.lang.Integer
incompatibilities issues. let me know if you can help me
troubleshoot.
-Terry

compile-ejb:
[javac] Compiling 234 source files to C:\Documents and
Settings\Yeod\Desktop\download\middlegen-2.1\samples\build\classes
[javac] C:\Documents and
Settings\Yeod\Desktop\download\middlegen-2.1\samples\build\gen-src\airline\ejb\Cpg132AlbumBean.java:480:
incompatible types
[javac] found : <nulltype>
[javac] required: int
[javac] return null;
[javac] ^

Post by Terry W
I found the drop down with the primitive values for cmp2.0
persistence. I will test it out now.
-Terry

Post by Ben Litchfield
Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.
Ben

Terry W

2004-10-06 14:02:17 UTC

Permalink

I am getting more familiarized with middlegen. I think I am going to
take some time and make some more practice databases and run middlegen
against them.

so, this question is closed for now, until I will reinvestigate it later.

I am going to test the airline.ear file and see if it is compatible
with JBoss 4.0.

btw, I had a warning
WARNING (cmp20): JBoss 3.0 doesn't support fields that are part of CMR
to be CMP at the same time. You might want to set fkcmp="false" in the
cmp20 plugin.

has this issue been resolved with JBoss 4.0?
-Terry

Post by Terry W
I tested it out using primitive attributes for the primary keys but I
ran into another build problem during the build process for EJBs.
So, I'm returning back to getting the int and java.lang.Integer
incompatibilities issues. let me know if you can help me
troubleshoot.
-Terry
[javac] Compiling 234 source files to C:\Documents and
Settings\Yeod\Desktop\download\middlegen-2.1\samples\build\classes
[javac] C:\Documents and
incompatible types
[javac] found : <nulltype>
[javac] required: int
[javac] return null;
[javac] ^

Post by Terry W
I found the drop down with the primitive values for cmp2.0
persistence. I will test it out now.
-Terry

Post by Ben Litchfield
Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.
Ben

Eivind Waaler

2004-10-06 14:15:35 UTC

Permalink

One point, instead of using the gui you can often just edit the
preferences file generated by Middlegen. In the sample this is located
under src/.

For instance replace all occurences of 'int' with 'Integer' or similar.
This is often much faster than using the gui..

.eivind

Post by Terry W
I am getting more familiarized with middlegen. I think I am going to
take some time and make some more practice databases and run middlegen
against them.
so, this question is closed for now, until I will reinvestigate it later.
I am going to test the airline.ear file and see if it is compatible
with JBoss 4.0.
btw, I had a warning
WARNING (cmp20): JBoss 3.0 doesn't support fields that are part of CMR
to be CMP at the same time. You might want to set fkcmp="false" in the
cmp20 plugin.
has this issue been resolved with JBoss 4.0?
-Terry

Post by Terry W
I found the drop down with the primitive values for cmp2.0
persistence. I will test it out now.
-Terry

Post by Ben Litchfield
Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.
Ben

Terry W

2004-10-06 17:13:27 UTC

Permalink

I checked that out. The file
'\middlegen-2.1\samples\src\airline-prefs.properties'

lists all the primitives and wrapper classes there. However, I'm
experiencing that the airline-prefs.properties file is being
overwritten each time I run middlegen, with the ant command.

Is their a method to run middlegen without overwriting the
'airline-prefs.properties' each time?
-Terry

On Wed, 6 Oct 2004 18:13:31 +0200 (CEST), Eivind Waaler

Post by Eivind Waaler
One point, instead of using the gui you can often just edit the
preferences file generated by Middlegen. In the sample this is located
under src/.
For instance replace all occurences of 'int' with 'Integer' or similar.
This is often much faster than using the gui..
.eivind

Post by Terry W
I found the drop down with the primitive values for cmp2.0
persistence. I will test it out now.
-Terry

Post by Ben Litchfield
Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.
Ben

Terry W

2004-10-06 17:16:18 UTC

Permalink

excuse me first and thank you, I was able to update the
'airline-prefs.properties' file without losing my changes.
-Terry

Post by Terry W
I checked that out. The file
'\middlegen-2.1\samples\src\airline-prefs.properties'
lists all the primitives and wrapper classes there. However, I'm
experiencing that the airline-prefs.properties file is being
overwritten each time I run middlegen, with the ant command.
Is their a method to run middlegen without overwriting the
'airline-prefs.properties' each time?
-Terry
On Wed, 6 Oct 2004 18:13:31 +0200 (CEST), Eivind Waaler

Post by Terry W
I found the drop down with the primitive values for cmp2.0
persistence. I will test it out now.
-Terry

Post by Ben Litchfield
Have you changed the datatype in the gui? You can set either int or
java.lang.Integer.
Ben

Darren Hartford

2004-10-07 15:02:45 UTC

Permalink

There is also a JavaTypeMapper class you may want to look into and extend to specify dbtype-to-java mappings.

-----Original Message-----
Sent: Wednesday, October 06, 2004 3:15 PM
Subject: Re: [Middlegen-user] Middlegen 2.1 and an int and
java.lang.Integer interface incompatibility
excuse me first and thank you, I was able to update the
'airline-prefs.properties' file without losing my changes.
-Terry
On Wed, 6 Oct 2004 15:12:12 -0400, Terry W

Post by Eivind Waaler
One point, instead of using the gui you can often just edit the
preferences file generated by Middlegen. In the sample

this is located