This should give you an idea. It's modified from existing code so I
haven't tested it.
I've decided to use a collection of NumberFormat's. You could use any
string -> decimal conversion technique you like.
This can be used to an action by created a
<actionname>-conversion.properties will in the same directory as the
class, with an entry:
<propertyName>=example.DecimalConverter
where <propertyName> is the name of the property name that needs custom
conversion and <actionName> is the short class name of your action
-----
package example;
import org.apache.struts2.util.StrutsTypeConverter;
import java.util.Map;
import java.util.Locale;
import java.text.*;
import com.opensymphony.xwork2.util.TypeConversionException;
/**
* Multiple locale decimal conversion. Only applies to a single value
parameter.
*/
public class DecimalConverter extends StrutsTypeConverter {
private static final NumberFormat defaultFormat =
DecimalFormat.getInstance();
private static final NumberFormat[] acceptedNumberFormats = {
defaultFormat,
DecimalFormat.getInstance(Locale.GERMANY)
};
/**
* Converts one or more String values to the specified class.
*
* @param context the action context
* @param values the String values to be converted, such as those
submitted from an HTML form
* @param toClass the class to convert to
* @return the converted object
*/
public Object convertFromString(Map context, String[] values, Class
toClass) {
Number result = null;
if (values != null) {
if (values.length != 1) {
super.performFallbackConversion(context, values, toClass);
}
if (values.length > 0) {
for (NumberFormat format : acceptedNumberFormats) {
try {
result = format.parse(values[0]);
} catch (ParseException e) {
// swallow the exception
}
}
if (result == null) {
throw new TypeConversionException("Not a recognised
number format: "+values[0]);
}
}
}
return result;
}
/**
* Converts the specified object to a String.
*
* @param context the action context
* @param o the object to be converted
* @return the converted String
*/
public String convertToString(Map context, Object o) {
if (o instanceof Date) {
return defaultFormat.format(o);
} else {
return null;
}
}
}
Ned Collyer wrote:
Thanks for the reply.
I was hoping for some code.
It's obviously been fixed before somewhere, so why do we need to all
implement it again on a per case basis.
I'll go hack something together - if its worthy i'll contrib back here.
I'm a bit sick of struts and its "quirks" tbh.
Jeromy Evans - Blue Sky Minds wrote:
The default type converter uses the current locale.
As mentioned in the referenced thread, you can:
- create a custom type converter for that field that accepts a wider
variety of number formats; or;
- use a string for that field in your action and handle the conversion
yourself
To turn off the automatic "input" result for a conversion or validation
error you may remove the workflow interceptor from your action's
interceptor stack. I don't think that's a good idea though.
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