You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@myfaces.apache.org by Daniel Young <dy...@synyati.com.au> on 2006/11/10 05:23:51 UTC
Generics in for custom EL function
Hi all,
I'm trying to expose the following function in EL:
public static String getMessage(final String locale, final Map<String,
Message> messages) {
. . .
}
However I'm having trouble specifying the messages parameter in my
taglib.xml, due to the Generic. I have the following:
<function>
<function-name>getMessage</function-name>
<function-class>com.synyati.spurwing.i18n.entity.Message</function-class>
<function-signature>java.lang.String
getLocalisedMessage(java.lang.String,
java.util.Map<java.lang.String,com.synyati.spurwing.i18n.entity.Message&g
t;)</function-signature>
</function>
The < seems to encode fine, but there comma between the String and
Message seems to confuse things. I get the following:
Caused by: java.lang.ClassNotFoundException: java.util.Map<java.lang.String
Is this a known error, or can I get around it somehow?
Cheers,
Daniel.
Re: Generics in for custom EL function
Posted by Andrew Robinson <an...@gmail.com>.
Generics aren't present at runtime -- they are a compile time "hack"
in Java. So at run time, your 2nd argument is a Map, nothing special
about it (the generic is no longer visible then). So you will be
correct in not putting the generic definition in the function
definition.
On 11/9/06, Daniel Young <dy...@synyati.com.au> wrote:
>
>
>
>
>
>
>
> PS: if I remove the generic part from the Map declaration works fine, so
> it's not a biggie…
>
>
> ________________________________
>
>
> From: Daniel Young [mailto:dyoung@synyati.com.au]
> Sent: Friday, 10 November 2006 2:24 PM
> To: users@myfaces.apache.org
> Subject: Generics in <function-signature> for custom EL function
>
>
>
>
> Hi all,
>
>
>
> I'm trying to expose the following function in EL:
>
>
>
> public static String getMessage(final String locale, final Map<String,
> Message> messages) {
>
> . . .
>
> }
>
>
>
> However I'm having trouble specifying the messages parameter in my
> taglib.xml, due to the Generic. I have the following:
>
>
>
> <function>
>
> <function-name>getMessage</function-name>
>
>
> <function-class>com.synyati.spurwing.i18n.entity.Message</function-class>
>
> <function-signature>java.lang.String
> getLocalisedMessage(java.lang.String,
> java.util.Map<java.lang.String,com.synyati.spurwing.i18n.entity.Message>)</function-signature>
>
> </function>
>
>
>
>
> The < seems to encode fine, but there comma between the String and
> Message seems to confuse things. I get the following:
>
>
>
> Caused by: java.lang.ClassNotFoundException:
> java.util.Map<java.lang.String
>
>
>
> Is this a known error, or can I get around it somehow?
>
>
>
>
>
> Cheers,
>
> Daniel.
>
>
RE: Generics in for custom EL function
Posted by Daniel Young <dy...@synyati.com.au>.
PS: if I remove the generic part from the Map declaration works fine, so
it's not a biggie.
_____
From: Daniel Young [mailto:dyoung@synyati.com.au]
Sent: Friday, 10 November 2006 2:24 PM
To: users@myfaces.apache.org
Subject: Generics in <function-signature> for custom EL function
Hi all,
I'm trying to expose the following function in EL:
public static String getMessage(final String locale, final Map<String,
Message> messages) {
. . .
}
However I'm having trouble specifying the messages parameter in my
taglib.xml, due to the Generic. I have the following:
<function>
<function-name>getMessage</function-name>
<function-class>com.synyati.spurwing.i18n.entity.Message</function-class>
<function-signature>java.lang.String
getLocalisedMessage(java.lang.String,
java.util.Map<java.lang.String,com.synyati.spurwing.i18n.entity.Message&g
t;)</function-signature>
</function>
The < seems to encode fine, but there comma between the String and
Message seems to confuse things. I get the following:
Caused by: java.lang.ClassNotFoundException: java.util.Map<java.lang.String
Is this a known error, or can I get around it somehow?
Cheers,
Daniel.