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Struts & Hibernate
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| | | - How to display exception messages for fields | - How to display exception messages for fields 2007-08-13 - By ellenzhao
Back
Here is the entity class:
| @(protected)
| @(protected)("foo")
| @(protected)(name = "foo")
| public class Foo implements Serializable {
| ...
| @(protected)(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 @(protected),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!";
| @(protected)
| 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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&p=4073648#4073648
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