[jboss-user] [JBoss Seam] - How to validate currency/float precision on a form

[jfrankman]

Other than doing it manually, is it possible to validate a currency or float amount on a form to make sure that it conforms to a certain precision and scale? I was hoping I could use an annotation on the entity or a f:convertnumber on the form but have not had any success.

I am trying to validate an input field to make sure the input currency amount has a precision of 7 and a scale of 2. I have tried the following:

1. Used <f:convertNumber type="currency" currencySymbol="$"/>
 inside my input text field. RESULT: The form produces an error "value must be a number" even if the number is valid.

2. Used <f:convertNumber maxFractionDigits="2" minFractionDigits="2"/>
 in the inputtext field,. RESULT: Any fraction amount is used. No validation occurs.

3. Use @Digits on the entity bean. RESULT: cannot find annotation. I presume that the @Digits is not included in the hibernate validator that comes with seam 1.2.1 GA.

My entity class is:

@Entity
  | @Table(name = "FBCLIENTTRANSLINEITEMS")
  | @Name("clientTransmittalLineItem")
  | @Scope(ScopeType.SESSION)
  | public class ClientTransmittalLineItemVO {
  | 
  | 	private int lineitemid;
  | 	private ClientTransmittalVO clientTransmittalVO;
  | 	private Double cashamount;
  | 
  | 	public ClientTransmittalLineItemVO() {
  | 	}
  | 
  | 	@Id
  | 	@Column(name = "LINEITEMID", unique = true, nullable = false)
  | 	@NotNull @GeneratedValue
  | 	public int getLineitemid() {
  | 		return this.lineitemid;
  | 	}
  | 
  | 	@Column(name = "CASHAMOUNT", precision=7, scale=2)
  | 	public Double getCashamount() {
  | 		return this.cashamount;
  | 	}
  | 
  | 	public void setCashamount(Double cashamount) {
  | 		this.cashamount = cashamount;
  | 	}
  | }

My xhtml is:
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
  |                              "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  | 
  | <ui:composition xmlns="http://www.w3.org/1999/xhtml"
  |                 xmlns:s="http://jboss.com/products/seam/taglib"
  |                 xmlns:ui="http://java.sun.com/jsf/facelets"
  |                 xmlns:f="http://java.sun.com/jsf/core"
  |                 xmlns:h="http://java.sun.com/jsf/html"
  |                 xmlns:a="https://ajax4jsf.dev.java.net/ajax"
  |                 xmlns:rich="http://richfaces.ajax4jsf.org/rich"
  |                 template="layout/frametemplate.xhtml">
  |                        
  | <ui:define name="body">
  |     
  |     <h:messages globalOnly="true" styleClass="message" id="globalMessages"/>
  | 
  |     <h:form id="clienttranslineitems" styleClass="edit">
  |         <rich:panel>
  |             <f:facet name="header">Edit Transmittal Line Item</f:facet>
  | 
  |             <s:decorate id="lineitemidDecoration" template="layout/edit.xhtml">
  |                 <ui:define name="label">Line Item ID</ui:define>
  |                 <h:inputText id="lineitemid"
  |                        required="true"
  |                           value="#{lineItem.lineitemid}">
  |                     <a:support event="onblur" reRender="lineitemidDecoration"/>
  |                 </h:inputText>
  |             </s:decorate>
  | 
  |             <s:decorate id="cashamountDecoration" template="layout/edit.xhtml">
  |                 <ui:define name="label">Cash Amount</ui:define>
  |                 <h:inputText id="cashamount" 
  |                           value="#{lineItem.cashamount}">
  |                            
  |                            <a:support event="onblur" reRender="checkamountDecoration"/>
  | 					<f:convertNumber type="currency" currencySymbol="$"/>
  |                 </h:inputText>
  |             </s:decorate>
  |         
  |             <div style="clear:both">
  |                 <span class="required">*</span> 
  |                 required fields
  |             </div>
  |         </rich:panel>
  |         <div class="actionButtons">
  | 						<h:commandButton
  | 							action="#{clientTransmittalLineItemAction.saveClientTransmittalLineItem}"
  | 							id="create" value="Save">
  | 						</h:commandButton>  
  |         </div>
  |     </h:form>
  | </ui:define>
  | </ui:composition>

My Environment:
JBoss 4.0.5
Seam 1.2.1 GA
Project is generated by seam-gen.

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