Currency or Number Validators

[Jamie Orchard-Hays <ja...@dang.com>]

Anyone out there already have a Number or Currency Validator that handles
commas they'd like to share?

Thanks,
Jamie


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Re: Currency or Number Validators

[Paul Ferraro <pm...@columbia.edu>]

Here's a rough draft for one.  It leverages the java.text.DecimalFormat 
class to handle any type of decorated number.
Unfortunately, I never got around to implementing client-side validation 
ability.

import java.text.DecimalFormat;
import java.text.ParseException;

import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.valid.BaseValidator;
import org.apache.tapestry.valid.ValidationConstraint;
import org.apache.tapestry.valid.ValidatorException;

public class DecimalValidator extends BaseValidator
{
    private String invalidNumberFormatMessage;
    private DecimalFormat decimalFormat = new DecimalFormat();
   
    /**
     * @see 
org.apache.tapestry.valid.IValidator#toObject(org.apache.tapestry.form.IFormComponent, 
java.lang.String)
     */
    public Object toObject(IFormComponent field, String string) throws 
ValidatorException
    {
        try
        {
            return this.decimalFormat.parse(string);
        }
        catch (ParseException e)
        {
            throw new 
ValidatorException(this.buildInvalidNumericFormatMessage(field), 
ValidationConstraint.NUMBER_FORMAT);
        }
    }

    /**
     * @see 
org.apache.tapestry.valid.IValidator#toString(org.apache.tapestry.form.IFormComponent, 
java.lang.Object)
     */
    public String toString(IFormComponent field, Object object)
    {
        if (object == null) return null;

        Number number = (Number) object;
       
        return this.decimalFormat.format(number.doubleValue());
    }

    public String getInvalidNumberFormatMessage()
    {
        return this.invalidNumberFormatMessage;
    }
   
    public void setInvalidNumberFormatMessage(String 
invalidNumberFormatMessage)
    {
        this.invalidNumberFormatMessage = invalidNumberFormatMessage;
    }
   
    public String getFormat()
    {
        return this.decimalFormat.toPattern();
    }
   
    public void setFormat(String pattern)
    {
        this.decimalFormat.applyPattern(pattern);
    }
   
    protected String buildInvalidNumericFormatMessage(IFormComponent field)
    {
        String pattern = 
super.getPattern(this.getInvalidNumberFormatMessage(), 
"invalid-numeric-format", field.getPage().getLocale());

        return super.formatString(pattern, field.getDisplayName());
    }
}

Jamie Orchard-Hays wrote:

>Anyone out there already have a Number or Currency Validator that handles
>commas they'd like to share?
>
>Thanks,
>Jamie
>
>
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>To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
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>
>  
>


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