Yeah, but that way you have to cast outsite getConverter:
IConverter<Integer> c = (IConverter<Integer>) getConverter(Integer.class);
The way I propose, the casting control is inside.
On Tue, Apr 15, 2008 at 4:39 PM, Igor Vaynberg <[EMAIL PROTECTED]>
wrote:
> if i have to do a hard cast there is very little advantage to <L>,
> might as well be public IConverter<?> getConverter(Class<?> clazz)
>
> -igor
>
>
> On Tue, Apr 15, 2008 at 12:25 PM, Bruno Borges <[EMAIL PROTECTED]>
> wrote:
> > This is what you could do:
> >
> > import java.util.Locale;
> >
> > public class Test {
> > public <L> IConverter<L> getConverter(Class<L> type) {
> > return null;
> > }
> > }
> >
> > class InnerTest extends Test {
> >
> > public <K> IConverter<K> getConverter(Class<K> type) {
> > if (Integer.class.isAssignableFrom(type)) {
> > return (IConverter<K>) new IConverter<Integer>() {
> >
> > public Integer convertToObject(String value, Locale locale)
> {
> > return null;
> > }
> > public String convertToString(Integer value, Locale locale)
> {
> > return null;
> > }
> > };
> > } else {
> > return super.getConverter(type);
> > }
> > }
> >
> > public void foo() {
> > IConverter<Integer> converter = getConverter(Integer.class);
> > }
> > }
> >
> > interface IConverter<X> {
> > public X convertToObject(String value, Locale locale);
> > public String convertToString(Integer value, Locale locale);
> > }
> >
> > But, you are obligated to use a hard cast inside of getConverter either
> way.
> >
> > Regards
> >
> > On Tue, Apr 15, 2008 at 4:04 PM, Igor Vaynberg <[EMAIL PROTECTED]
> >
> >
> >
> > wrote:
> >
> > > Type mismatch: cannot convert from new IConverter<Integer>(){} to
> > > IConverter<Z>
> > >
> > > i can hard cast to IConverter<Z> myself, but then there is very
> little
> > > point to having it generified
> > >
> > > -igor
> > >
> > >
> > > On Tue, Apr 15, 2008 at 11:59 AM, Bruno Borges <
> [EMAIL PROTECTED]>
> > > wrote:
> > > > What is the compile error message?
> > > >
> > > > On Tue, Apr 15, 2008 at 3:10 PM, Igor Vaynberg <
> [EMAIL PROTECTED]
> > > >
> > > >
> > > >
> > > > wrote:
> > > >
> > > > > maybe just IConverter<?> getConverter(Class<?> cl)
> > > > >
> > > > > -igor
> > > > >
> > > > >
> > > > > On Tue, Apr 15, 2008 at 11:05 AM, Igor Vaynberg <
> > > [EMAIL PROTECTED]>
> > > > > wrote:
> > > > > > example below doesnt compile, so im not exactly sure how to
> > > override
> > > > > > generified getconverter() properly ... do we need to change
> our
> > > > > > generics decl somehow?
> > > > > >
> > > > > > -igor
> > > > > >
> > > > > > @Override
> > > > > > public <Z> IConverter<Z> getConverter(Class<Z> type)
> > > > > > {
> > > > > > if (Integer.class.isAssignableFrom(type))
> > > > > > {
> > > > > > return new IConverter<Integer>()
> > > > > > {
> > > > > > private static final long
> > > > > serialVersionUID = 1L;
> > > > > >
> > > > > > public Integer
> > > convertToObject(String
> > > > > value, Locale locale)
> > > > > > {
> > > > > > return null;
> > > > > > }
> > > > > >
> > > > > > public String
> > > convertToString(Integer
> > > > > value, Locale locale)
> > > > > > {
> > > > > > return null;
> > > > > > }
> > > > > >
> > > > > > };
> > > > > > }
> > > > > > else
> > > > > > {
> > > > > > return super.getConverter(type);
> > > > > > }
> > > > > > }
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Bruno Borges
> > > > blog.brunoborges.com.br
> > > > +55 1185657739
> > > >
> > > > "The glory of great men should always be
> > > > measured by the means they have used to
> > > > acquire it."
> > > > - Francois de La Rochefoucauld
> > > >
> > >
> >
> >
> >
> > --
> >
> >
> > Bruno Borges
> > blog.brunoborges.com.br
> > +55 1185657739
> >
> > "The glory of great men should always be
> > measured by the means they have used to
> > acquire it."
> > - Francois de La Rochefoucauld
> >
>
--
Bruno Borges
blog.brunoborges.com.br
+55 1185657739
"The glory of great men should always be
measured by the means they have used to
acquire it."
- Francois de La Rochefoucauld
