Interface MethodMatcher
- All Known Subinterfaces:
IntroductionAwareMethodMatcher
- All Known Implementing Classes:
AbstractRegexpMethodPointcut
,AnnotationMethodMatcher
,AspectJExpressionPointcut
,ControlFlowPointcut
,DynamicMethodMatcher
,DynamicMethodMatcherPointcut
,JCacheOperationSourcePointcut
,JdkRegexpMethodPointcut
,NameMatchMethodPointcut
,StaticMethodMatcher
,StaticMethodMatcherPointcut
,StaticMethodMatcherPointcutAdvisor
Pointcut
: Checks whether the target method is eligible for advice.
A MethodMatcher may be evaluated statically or at runtime (dynamically). Static matching involves method and (possibly) method attributes. Dynamic matching also makes arguments for a particular call available, and any effects of running previous advice applying to the joinpoint.
If an implementation returns false
from its isRuntime()
method, evaluation can be performed statically, and the result will be the same
for all invocations of this method, whatever their arguments. This means that
if the isRuntime()
method returns false
, the 3-arg
matches(java.lang.reflect.Method, Class, Object[])
method will never be invoked.
If an implementation returns true
from its 2-arg
matches(java.lang.reflect.Method, Class)
method and its isRuntime()
method
returns true
, the 3-arg matches(java.lang.reflect.Method, Class, Object[])
method will be invoked immediately before each potential execution of the related advice,
to decide whether the advice should run. All previous advice, such as earlier interceptors
in an interceptor chain, will have run, so any state changes they have produced in
parameters or ThreadLocal state will be available at the time of evaluation.
Concrete implementations of this interface typically should provide proper
implementations of Object.equals(Object)
and Object.hashCode()
in order to allow the matcher to be used in caching scenarios — for
example, in proxies generated by CGLIB.
- Since:
- 11.11.2003
- Author:
- Rod Johnson
- See Also:
-
Field Summary
Modifier and TypeFieldDescriptionstatic final MethodMatcher
Canonical instance that matches all methods. -
Method Summary
Modifier and TypeMethodDescriptionboolean
Is this MethodMatcher dynamic, that is, must a final call be made on thematches(java.lang.reflect.Method, Class, Object[])
method at runtime even if the 2-arg matches method returnstrue
?boolean
Perform static checking whether the given method matches.boolean
Check whether there a runtime (dynamic) match for this method, which must have matched statically.
-
Field Details
-
TRUE
Canonical instance that matches all methods.
-
-
Method Details
-
matches
Perform static checking whether the given method matches.If this returns
false
or if theisRuntime()
method returnsfalse
, no runtime check (i.e. nomatches(java.lang.reflect.Method, Class, Object[])
call) will be made.- Parameters:
method
- the candidate methodtargetClass
- the target class- Returns:
- whether this method matches statically
-
isRuntime
boolean isRuntime()Is this MethodMatcher dynamic, that is, must a final call be made on thematches(java.lang.reflect.Method, Class, Object[])
method at runtime even if the 2-arg matches method returnstrue
?Can be invoked when an AOP proxy is created, and need not be invoked again before each method invocation,
- Returns:
- whether a runtime match via the 3-arg
matches(java.lang.reflect.Method, Class, Object[])
method is required if static matching passed
-
matches
Check whether there a runtime (dynamic) match for this method, which must have matched statically.This method is invoked only if the 2-arg matches method returns
true
for the given method and target class, and if theisRuntime()
method returnstrue
. Invoked immediately before potential running of the advice, after any advice earlier in the advice chain has run.- Parameters:
method
- the candidate methodtargetClass
- the target classargs
- arguments to the method- Returns:
- whether there's a runtime match
- See Also:
-