[jira] [Assigned] (TAP5-1947) BigDecimal Validator

["Howard M. Lewis Ship (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-1947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Howard M. Lewis Ship reassigned TAP5-1947:
------------------------------------------

    Assignee:     (was: Howard M. Lewis Ship)

> BigDecimal Validator
> --------------------
>
>                 Key: TAP5-1947
>                 URL: https://issues.apache.org/jira/browse/TAP5-1947
>             Project: Tapestry 5
>          Issue Type: Improvement
>          Components: tapestry-core
>    Affects Versions: 5.3.3
>            Reporter: George Christman
>              Labels: features
>
> Tapestry should offer the ability to validate BigDecimal max length's for currency/amounts. I'm donating the following code which validates maxScale and maxPrecision. Unfortunately, I haven't written anything to handle the clientside validation. 
> //app.properties
> maximum-precision=You may provide at most %d numbers for %s.
> maximum-scale=You may provide at most %d decimal digits for %s.
> //MaxScale
> public class MaxScale extends AbstractValidator<Integer, BigDecimal> {
>     public MaxScale() {
>         super(Integer.class, BigDecimal.class, "maximum-scale");
>     }
>     @Override
>     public void validate(Field field, Integer constraintValue, MessageFormatter formatter, BigDecimal value)
>             throws ValidationException
>     {        
>         if (value.scale() > constraintValue)
>             throw new ValidationException(buildMessage(formatter, field, constraintValue));
>     }
>     private String buildMessage(MessageFormatter formatter, Field field, Integer constraintValue) {
>         return formatter.format(constraintValue, field.getLabel());
>     }
>    
>     @Override
>     public void render(Field field, Integer constraintValue, MessageFormatter formatter, MarkupWriter writer,
>             FormSupport formSupport) {
>         formSupport.addValidation(field, "maxscale", buildMessage(formatter, field, constraintValue), constraintValue);
>     }
> }
> //MaxPrecision
> public class MaxPrecision extends AbstractValidator<Integer, BigDecimal> {
>     public MaxPrecision() {
>         super(Integer.class, BigDecimal.class, "maximum-precision");
>     }
>     @Override
>     public void validate(Field field, Integer constraintValue, MessageFormatter formatter, BigDecimal value)
>             throws ValidationException
>     {        
>         if (value.precision() > constraintValue)
>             throw new ValidationException(buildMessage(formatter, field, constraintValue));
>     }
>     private String buildMessage(MessageFormatter formatter, Field field, Integer constraintValue) {
>         return formatter.format(constraintValue, field.getLabel());
>     }
>    
>     @Override
>     public void render(Field field, Integer constraintValue, MessageFormatter formatter, MarkupWriter writer,
>             FormSupport formSupport) {
>         formSupport.addValidation(field, "maxprecision", buildMessage(formatter, field, constraintValue), constraintValue);
>     }
> }
> //AppModule
>     @SuppressWarnings("rawtypes")
>     public static void contributeFieldValidatorSource(MappedConfiguration<String, Validator> configuration) {
>         configuration.add("maxScale", new MaxScale());
>         configuration.add("maxPrecision", new MaxPrecision());
>     } 



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