MethodMatcher
| org.springframework.aop.MethodMatcher |
Class Overview
Part of a 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.
See Also
Summary
| Fields | |||||||||||
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| TRUE | Canonical instance that matches all methods. | ||||||||||
| Public Methods | |||||||||||
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Is this MethodMatcher dynamic, that is, must a final call be made on the
matches(java.lang.reflect.Method, Class, Object[]) method at
runtime even if the 2-arg matches method returns true?
Can be invoked when an AOP proxy is created, and need not be invoked again before each method invocation, | |||||||||||
Perform static checking whether the given method matches.
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Check whether there a runtime (dynamic) match for this method,
which must have matched statically.
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Fields
Public Methods
public abstract boolean isRuntime ()
Is this MethodMatcher dynamic, that is, must a final call be made on the
matches(java.lang.reflect.Method, Class, Object[]) method at
runtime even if the 2-arg matches method returns true?
Can be invoked when an AOP proxy is created, and need not be invoked again before each method invocation,
Returns
- whether or not a runtime match via the 3-arg
matches(java.lang.reflect.Method, Class, Object[])method is required if static matching passed
public abstract boolean matches (Method method, Class<?> targetClass)
Perform static checking whether the given method matches. If this
returns false or if the isRuntime() method
returns false, no runtime check (i.e. no.
matches(java.lang.reflect.Method, Class, Object[]) call) will be made.
Parameters
| method | the candidate method |
|---|---|
| targetClass | the target class (may be null, in which case
the candidate class must be taken to be the method's declaring class) |
Returns
- whether or not this method matches statically
public abstract boolean matches (Method method, Class<?> targetClass, Object[] args)
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 the
isRuntime() method returns true. Invoked
immediately before potential running of the advice, after any
advice earlier in the advice chain has run.
Parameters
| method | the candidate method |
|---|---|
| targetClass | the target class (may be null, in which case
the candidate class must be taken to be the method's declaring class) |
| args | arguments to the method |
Returns
- whether there's a runtime match