org.springframework.aop.support

Class ControlFlowPointcut

java.lang.Object

org.springframework.aop.support.ControlFlowPointcut

All Implemented Interfaces:

java.io.Serializable, ClassFilter, MethodMatcher, Pointcut

public class ControlFlowPointcut
extends java.lang.Object
implements Pointcut, ClassFilter, MethodMatcher, java.io.Serializable

Pointcut and method matcher for use in simple cflow-style pointcut. Note that evaluating such pointcuts is 10-15 times slower than evaluating normal pointcuts, but they are useful in some cases.

Author:

Rod Johnson, Rob Harrop

See Also:

ControlFlow, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Class<?>	clazz
private int	evaluations
private java.lang.String	methodName

Fields inherited from interface org.springframework.aop.Pointcut

TRUE

Fields inherited from interface org.springframework.aop.ClassFilter

TRUE

Fields inherited from interface org.springframework.aop.MethodMatcher

TRUE

Constructor Summary

Constructors

Constructor and Description
ControlFlowPointcut(java.lang.Class<?> clazz) Construct a new pointcut that matches all control flows below that class.
ControlFlowPointcut(java.lang.Class<?> clazz, java.lang.String methodName) Construct a new pointcut that matches all calls below the given method in the given class.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object other)
ClassFilter	getClassFilter() Return the ClassFilter for this pointcut.
int	getEvaluations() It's useful to know how many times we've fired, for optimization.
MethodMatcher	getMethodMatcher() Return the MethodMatcher for this pointcut.
int	hashCode()
boolean	isRuntime() Is this MethodMatcher dynamic, that is, must a final call be made on the MethodMatcher.matches(java.lang.reflect.Method, Class, Object[]) method at runtime even if the 2-arg matches method returns true?
boolean	matches(java.lang.Class<?> clazz) Subclasses can override this for greater filtering (and performance).
boolean	matches(java.lang.reflect.Method method, java.lang.Class<?> targetClass) Subclasses can override this if it's possible to filter out some candidate classes.
boolean	matches(java.lang.reflect.Method method, java.lang.Class<?> targetClass, java.lang.Object[] args) Check whether there a runtime (dynamic) match for this method, which must have matched statically.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

clazz

private java.lang.Class<?> clazz

methodName

private java.lang.String methodName

evaluations

private int evaluations

Constructor Detail

ControlFlowPointcut

public ControlFlowPointcut(java.lang.Class<?> clazz)

Construct a new pointcut that matches all control flows below that class.

Parameters:

clazz - the clazz

ControlFlowPointcut

public ControlFlowPointcut(java.lang.Class<?> clazz,
                           java.lang.String methodName)

Construct a new pointcut that matches all calls below the given method in the given class. If the method name is null, matches all control flows below that class.

Parameters:

clazz - the clazz

methodName - the name of the method

Method Detail

matches

public boolean matches(java.lang.Class<?> clazz)

Subclasses can override this for greater filtering (and performance).

Specified by:

matches in interface ClassFilter

Parameters:

clazz - the candidate target class

Returns:

whether the advice should apply to the given target class

matches

public boolean matches(java.lang.reflect.Method method,
                       java.lang.Class<?> targetClass)

Subclasses can override this if it's possible to filter out some candidate classes.

Specified by:

matches in interface MethodMatcher

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

isRuntime

public boolean isRuntime()

Description copied from interface: MethodMatcher

Is this MethodMatcher dynamic, that is, must a final call be made on the MethodMatcher.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,

Specified by:

isRuntime in interface MethodMatcher

Returns:

whether or not a runtime match via the 3-arg MethodMatcher.matches(java.lang.reflect.Method, Class, Object[]) method is required if static matching passed

matches

public boolean matches(java.lang.reflect.Method method,
                       java.lang.Class<?> targetClass,
                       java.lang.Object[] args)

Description copied from interface: MethodMatcher

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 MethodMatcher.isRuntime() method returns true. Invoked immediately before potential running of the advice, after any advice earlier in the advice chain has run.

Specified by:

matches in interface MethodMatcher

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

See Also:

MethodMatcher.matches(Method, Class)

getEvaluations

public int getEvaluations()

It's useful to know how many times we've fired, for optimization.

getClassFilter

public ClassFilter getClassFilter()

Description copied from interface: Pointcut

Return the ClassFilter for this pointcut.

Specified by:

getClassFilter in interface Pointcut

Returns:

the ClassFilter (never null)

getMethodMatcher

public MethodMatcher getMethodMatcher()

Description copied from interface: Pointcut

Return the MethodMatcher for this pointcut.

Specified by:

getMethodMatcher in interface Pointcut

Returns:

the MethodMatcher (never null)

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object