generic validator questions
Hi I am new to wicket and during my studying phase (1.3b2) I wrote a
small validator for my pilot project.
Validator checks that class indicated by some control implements
specified interface or is subclass of specified class. It works like
charm.
But I have a big problems locating the messages for display purposes.
What is the correct way to make a _generic_ validator (like
'PatternValidator') not tied to any form and specify his messages in
some .properties file ???
Can some kind soul enlight me ?
import org.apache.wicket.validation.*;
import org.apache.wicket.validation.validator.*;
public class ClassValidator extends AbstractValidator {
private static final long serialVersionUID = 1L;
private final Class ? validClass;
public ClassValidator (final Class ? validClass) {
this.validClass = validClass;
}
@Override
protected void onValidate (final IValidatable validatable) {
final String validatableClassName = (String)
validatable.getValue();
try {
final Class ? validatableClass =
Class.forName(validatableClassName);
final Object validatableInstance =
validatableClass.newInstance();
if (!validClass.isInstance(validatableInstance))
error(validatable, notValid);
} catch (ClassNotFoundException problem) {
error(validatable, notFound);
} catch (InstantiationException problem) {
error(validatable, instantiation);
} catch (IllegalAccessException problem) {
error(validatable, illegalAccess);
}
}
}
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Re: generic validator questions
right now you have a few choices:
you can load that .properties file yourself from inside your validator
you can put these properties into application-scoped .properties file.
you can also add an rfe into our jira to allow validators to have their own
.properties bundles.
-igor
On 8/18/07, Stojce Dimski [EMAIL PROTECTED] wrote:
Hi I am new to wicket and during my studying phase (1.3b2) I wrote a
small validator for my pilot project.
Validator checks that class indicated by some control implements
specified interface or is subclass of specified class. It works like
charm.
But I have a big problems locating the messages for display purposes.
What is the correct way to make a _generic_ validator (like
'PatternValidator') not tied to any form and specify his messages in
some .properties file ???
Can some kind soul enlight me ?
import org.apache.wicket.validation.*;
import org.apache.wicket.validation.validator.*;
public class ClassValidator extends AbstractValidator {
private static final long serialVersionUID = 1L;
private final Class ? validClass;
public ClassValidator (final Class ? validClass) {
this.validClass = validClass;
}
@Override
protected void onValidate (final IValidatable validatable) {
final String validatableClassName = (String)
validatable.getValue();
try {
final Class ? validatableClass =
Class.forName(validatableClassName);
final Object validatableInstance =
validatableClass.newInstance();
if (!validClass.isInstance(validatableInstance))
error(validatable, notValid);
} catch (ClassNotFoundException problem) {
error(validatable, notFound);
} catch (InstantiationException problem) {
error(validatable, instantiation);
} catch (IllegalAccessException problem) {
error(validatable, illegalAccess);
}
}
}
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Re: generic validator questions
Hi Igor
The error message says:
Could not locate error message for error:
[org.apache.wicket.validation.ValidationError message=[null],
keys=[notFound, ClassValidator], variables=[]]
notFound - is my key
ClassValidator - is the name of the class
the .propeties file is together with .class file and and have identical
names...
inside .properties i have a row like this:
ClassValidator.notFound=${input} cannot be found on a classpath.
What is wrong with this ?
Thanks,
Stojce
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Re: generic validator questions
On 8/18/07, Stojce Dimski [EMAIL PROTECTED] wrote:
Hi Igor
The error message says:
Could not locate error message for error:
[org.apache.wicket.validation.ValidationError message=[null],
keys=[notFound, ClassValidator], variables=[]]
the problem looks like is that its looking for a notFound key or a
ClassValidator key, not for a ClassValidator.notFound key. so just
adjust your code.
-igor
notFound - is my key
ClassValidator - is the name of the class
the .propeties file is together with .class file and and have identical
names...
inside .properties i have a row like this:
ClassValidator.notFound=${input} cannot be found on a classpath.
What is wrong with this ?
Thanks,
Stojce
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Re: generic validator questions
Hi Igor,
First thing, thanks, your hints gave me the direction and I solved the
issue... I like the approach 'Classname.Key' and I think it's right for
this category of generic validators as are those in 'validator'
package.
It was just a question of overriding one method:
@Override
public void error (final IValidatable validatable, final String
resourceKey) {
super.error(validatable, resourceKey() + . + resourceKey);
}
and everything worked like a charm ;-)
What do you think of adding this validator in trunk ?
Cheers,
Stojce
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Re: generic validator questions
im not sure exactly what your usecase is.
we have something that is kind of similar, namely new TextField(number,
Integer.class); which would type convert the entered string into an Integer
and error out if the conversion could not be performed.
but i dont think this is the exact match to whatever it is you are trying to
achieve.
-igor
On 8/18/07, Stojce Dimski [EMAIL PROTECTED] wrote:
Hi Igor,
First thing, thanks, your hints gave me the direction and I solved the
issue... I like the approach 'Classname.Key' and I think it's right for
this category of generic validators as are those in 'validator'
package.
It was just a question of overriding one method:
@Override
public void error (final IValidatable validatable, final String
resourceKey) {
super.error(validatable, resourceKey() + . + resourceKey);
}
and everything worked like a charm ;-)
What do you think of adding this validator in trunk ?
Cheers,
Stojce
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