Problem using Seam currentDate

[oyesiji77]

I am trying to use the Seam currentDate Component,

I am injecting it into my bean using

@In CurrentDate currentDate;

but whenever i try accessing the page that uses the backing bean , I always get this exception

Caused by: java.lang.IllegalArgumentException: could not set field value: newListing.currentDate
        at org.jboss.seam.Component.setFieldValue(Component.java:1894)
        at org.jboss.seam.Component.access$600(Component.java:127)
        at org.jboss.seam.Component$BijectedField.set(Component.java:2902)
        at org.jboss.seam.Component.injectAttributes(Component.java:1703)
        at org.jboss.seam.Component.inject(Component.java:1521)
        at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:61)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:32)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
        at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
        at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)

Caused by: java.lang.IllegalArgumentException: Could not set field value by reflection: NewListingBean.currentDate on: com.nairakobo.action.NewListingBean with value: class java.sql.Date
        at org.jboss.seam.util.Reflections.set(Reflections.java:86)
        at org.jboss.seam.Component.setFieldValue(Component.java:1890)
        ... 116 more

Any help would be appreciated

[cash1981]

Could you explain why you want to use this component?

[zhangxiubo]

It seems to be a type mismatch error.

@Name("org.jboss.seam.framework.currentDate")
@Install(precedence=BUILT_IN)
@Scope(ScopeType.STATELESS)
@AutoCreate
public class CurrentDate
{
   @Unwrap 
   public Date getCurrentDate()
   {
      return new java.sql.Date( System.currentTimeMillis() );
   }
}

It is apparent that the org.jboss.seam.framework.CurrentDate does not extend java.util.Data which is the super class of java.sql.Date. Referencing the CurrentDate only return you the a date object populated with the current date but the component itself should not be assigned with a Date object. Is your currentDate initialised with a Date object elsewhere?

[oyesiji77]

I am trying to use this component because I would like to obtain the current Date, although i can also use new Date(), I would have preferred using a Seam component

[cash1981]

Jubril Oyesiji wrote on Jul 20, 2009 15:31:


I am trying to use this component because I would like to obtain the current Date, although i can also use new Date(), I would have preferred using a Seam component

Remember that this will take much longer time to perform instead of just new Date();
It will need to do a lookup and locate the currentDate component. Then go through all the interceptors and then perform unwrap. Really unnecessary if you just want a date object.

Take a look at joda-time if you have bigger date stuff to perform.