[jboss-user] [JBoss Seam] - How to display exception messages for fields

[ellenzhao]

Here is the entity class:



  | @Entity
  | @Name("foo")
  | @Table(name = "foo")
  | public class Foo implements Serializable {
  | ...
  | @Column(name = "non_repeat_cycle", nullable = false)
  |   public Short getNonRepeatCycle() {
  |     return nonRepeatCycle;
  |   }
  | 
  | public void setNonRepeatCycle(Short nonRepeatCycle)
  |       throws IllegalNonRepeatCycleException {
  |    boolean valid = true;
  |     if (nonRepeatCycle <= 0) {
  |       valid = false;
  |       throw new IllegalNonRepeatCycleException(nonRepeatCycle);
  |     } 
  |     if (valid){
  |       this.nonRepeatCycle = nonRepeatCycle;
  |     }
  |   }
  | ...
  | 


Client code in xhtml:

  | <s:decorate template="layout/edit.xhtml">
  |           <ui:define name="label">Non-repeat cycle:</ui:define>
  |           <h:inputText
  |             value="#{fooManager.foo.nonRepeatCycle}" required="true" />
  |           <h:outputText value=" days" />
  |         </s:decorate>
  | 
  | 

The idea is that,  this way the entity knows how to validate itself and I do not have to write a separate validator.

In fact it works very well, when I tested with the number "-3", there is error message displayed in red and the conversation hanged like expected (hanged but not killed, after I corrected the value, the conversation goes smoothly), and the view is also like expected....The only problem is, the error message looks like this:

  | /foo-management.xhtml @58,31 value="#{fooManager.foo.nonRepeatCycle}": Error writing 'nonRepeatCycle' on type myproject.entity.Foo
  | 

My exception class looks like this:

  | public class IllegalNonRepeatCycleException extends Exception {
  |   private static final String DEFAULT_MSG = "Non-repeat-cycle must be greater than zero!";  
  |   @Logger
  |   private static Log log;
  | 
  |   public IllegalNonRepeatCycleException(){
  |     super(DEFAULT_MSG);
  |   }
  |   
  |   public IllegalNonRepeatCycleException(Short nonRepeatCycle) {
  |     super(DEFAULT_MSG + " " + nonRepeatCycle + " is illegal.");
  |     log.info("Exception generated!");
  |   }
  |   
  |   public String toString(){
  |     return this.getMessage();
  |   }
  | }
  | 

It would be nice if the error message in the view can be the exception message. How to do this? Thanks in advance for any help!


Regards,
Ellen

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