Re: [Springframework-rcp-dev] Serious FieldMetaData issue with generics? Test included.

[Benoit X. <bx...@ob...>]

The issue seems to be related to the Spring BeanWrapper! (I=92m using =
Spring
2.0.6)

    public static void main(String[] a) {

        IntSuper1 intSuper1 =3D new IntSuper1(123);

        BeanWrapper bw =3D new BeanWrapperImpl(intSuper1);

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System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++++++=
+++
++++");

        System.out.println("name is of type:" + =
bw.getPropertyType("name"));

        System.out.println("id is of type:" + bw.getPropertyType("id"));

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System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++++++=
+++
++++");

       =20

    }

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This returns the same value (incorrect imho)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

name is of type:class java.lang.String

id is of type:class java.lang.Object

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

=20

Same if I use a generic directly like Super1<Integer> it still returns
Object as the type of =93id=94.

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Any suggestion apart from jumping off Tower Bridge?

=20

Thanks

=20

Benoit

=20

From: spr...@li...
[mailto:spr...@li...] On Behalf =
Of
Benoit Xhenseval
Sent: 08 August 2007 00:56
To: spr...@li...
Subject: [Springframework-rcp-dev] Serious FieldMetaData issue with
generics? Test included.
Importance: High

=20

Dear All,

=20

I'm faced with what I believe is a serious issue in Spring RC.

=20

I enclose an example of a typical code that I now face following some
refactoring.

Basically my method getId() used to return int and now is returning =
Integer.

No sweat one would say but ALL forms fails on trying to convert Object =
to
String and String to Object!

=20

java.lang.IllegalArgumentException: No converter registered to convert =
from
sourceClass 'class java.lang.String' to target class 'class
java.lang.Object'

        at
org.springframework.binding.convert.support.GenericConversionService.getC=
onv
ersionExecutor(GenericConversionService.java:145)

        at
org.springframework.binding.form.support.AbstractFormModel.createConverti=
ngV
alueModel(AbstractFormModel.java:350)

        at
org.springframework.binding.form.support.AbstractFormModel.getValueModel(=
Abs
tractFormModel.java:294)

        at
org.springframework.richclient.form.binding.support.AbstractBinding.getVa=
lue
Model(AbstractBinding.java:114)

        at
org.springframework.richclient.form.binding.swing.TextComponentBinding.do=
Bin
dControl(TextComponentBinding.java:39)

        at
org.springframework.richclient.form.binding.support.AbstractBinding.creat=
eCo
ntrol(AbstractBinding.java:75)

        at
org.springframework.richclient.factory.AbstractControlFactory.getControl(=
Abs
tractControlFactory.java:85)

        at
org.springframework.richclient.form.binding.support.AbstractBindingFactor=
y.i
nterceptBinding(AbstractBindingFactory.java:92)

        at
org.springframework.richclient.form.binding.support.AbstractBindingFactor=
y.c
reateBinding(AbstractBindingFactory.java:70)

        at
org.springframework.richclient.form.binding.support.AbstractBindingFactor=
y.c
reateBinding(AbstractBindingFactory.java:55)

        at
org.springframework.richclient.form.builder.AbstractFormBuilder.createDef=
aul
tBinding(AbstractFormBuilder.java:78)

        at
org.springframework.richclient.form.builder.TableFormBuilder.add(TableFor=
mBu
ilder.java:109)

        at
org.springframework.richclient.form.builder.TableFormBuilder.add(TableFor=
mBu
ilder.java:85)

        at
net.objectlab.springtest.TestForm.createFormControl(TestForm.java:22)

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The issue relates to the use of generics.

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The output for the example below is:

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++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

name is of type:class java.lang.String

id is of type:class java.lang.Object

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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I would have expected "id" to be of type java.lang.Integer.

=20

Has anyone faced this issue? Did you manage to find a workaround???=20

Please please!  I will also investigate the code in FielMetaData to try =
to
figure out what is happening.

=20

Many thanks!!

=20

Benoit

=20

----------------

=20

import org.springframework.binding.form.FormModel;

import org.springframework.richclient.form.FormModelHelper;

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public class GenericTest {

    public static void test() {

        IntSuper1 intSuper1 =3D new IntSuper1(123);

        FormModel model =3D FormModelHelper.createFormModel(intSuper1);

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System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++++++=
+++
++++");

        System.out.println("name is of type:" +
model.getFieldMetadata("name").getPropertyType());

        System.out.println("id is of type:" +
model.getFieldMetadata("id").getPropertyType());

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System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++++++=
+++
++++");

    }

   =20

    private static class Super1<T> {

        T id;

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        public Super1(T id) {

            this.id =3D id;

        }

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        public T getId() {

            return id;

        }

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        public void setId(T id) {

            this.id =3D id;

        }

    }

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    private static class IntSuper1 extends Super1<Integer> {

        private String name;

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        public IntSuper1(Integer id) {

            super(id);

        }

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        public String getName() {

            return name;

        }

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        public void setName(String name) {

            this.name =3D name;

        }

    }

}

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Checked by AVG Free Edition.
Version: 7.5.476 / Virus Database: 269.11.8/940 - Release Date: =
06/08/2007
16:53

=20

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.476 / Virus Database: 269.11.8/940 - Release Date: =
06/08/2007
16:53


No virus found in this outgoing message.
Checked by AVG Free Edition.=20
Version: 7.5.476 / Virus Database: 269.11.8/940 - Release Date: =
06/08/2007
16:53
=20