public interface FilterListener extends Serializable
Modifier and Type | Method and Description |
---|---|
Object |
evaluate(Object target,
Class targetClass,
Object[] args,
Class[] argClasses,
Object candidate,
StoreContext ctx)
Evaluate the given expression.
|
boolean |
expectsArguments()
Return true if this extension expects arguments to act on.
|
boolean |
expectsTarget()
Return true if this extension expects a target to act on.
|
String |
getTag()
Return the tag that this extension listens for.
|
Class |
getType(Class targetClass,
Class[] argClasses)
Return the expected type of the result of this listener.
|
String getTag()
boolean expectsArguments()
field.ext:toUpperCase ()
.boolean expectsTarget()
field.ext:toUpperCase ()
acts on the target
field
but has no arguments, while another possible form,
ext:toUpperCase (field)
has no target but does have an
argument.Object evaluate(Object target, Class targetClass, Object[] args, Class[] argClasses, Object candidate, StoreContext ctx)
target
- the target object / field value to act on; will be
null if this extension does not expect a targettargetClass
- the expected class of the target; given in case
the target evaluates to null and typing is neededargs
- the values of the arguments given in the filter;
will be null if this extension does not expect an argumentargClasses
- the expected classes of the arguments; given in case
an argument evaluates to null and typing is neededcandidate
- the candidate object being evaluatedctx
- the persistence contextBoolean.TRUE
or Boolean.FALSE
UserException
- if this extension does not
support in-memory operationCopyright © 2006–2018 Apache Software Foundation. All rights reserved.