Re: Custom coercion from String to Long

[Christian Köberl]

The problem is that Tapestry itself is already adding this Coercion:

TapestryIOCModule:
add(configuration, String.class, Long.class, new CoercionString,
Long()
{
public Long coerce(String input)
{
return new Long(input);
}
});

So, the only possible way is to decorate (override) the TypeCoercer and
return your implementation on coerce.
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Re: Custom coercion from String to Long

[Howard Lewis Ship]

Actually, you can't decorate TypeCoercer, so you are basically out of luck.

However, since you are talking about encoding and decoding data in
URLs and query parameters, you can work with the ValueEncoderSource
instead!  It has a more flexible, more forgiving configuration.

On Mon, Oct 4, 2010 at 1:51 AM, Christian Köberl
tapestry.christian.koeb...@gmail.com wrote:

 The problem is that Tapestry itself is already adding this Coercion:

 TapestryIOCModule:
        add(configuration, String.class, Long.class, new CoercionString,
 Long()
        {
            public Long coerce(String input)
            {
                return new Long(input);
            }
        });

 So, the only possible way is to decorate (override) the TypeCoercer and
 return your implementation on coerce.
 --
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 http://tapestry-users.832.n2.nabble.com/Custom-coercion-from-String-to-Long-tp5582965p5598307.html
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Custom coercion from String to Long

[Radek Terber]

Hi all

I need the cutom coercion from String to Long, which will translate empty
strings to null Long value. I tried add contribution to my AppModule, but
with no success - coercion to Long is still processed by old manner. Is
there any way to do it?

Thans.


Here is part of my AppModule:

 public static void contributeTypeCoercer(ConfigurationCoercionTuple
configuration) {

CoercionString, Long cc = new CoercionString, Long() {
public Long coerce(String input)
{
 if(input == null || input.length() == 0) {
 return null;
 }
return new Long(input);
}
};

CoercionTupleString, Long tuple = new CoercionTupleString,
Long(String.class, Long.class, cc);
configuration.add(tuple);

}