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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.util

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.springframework.util .MethodInvoker

All known Subclasses:   org.springframework.beans.support .ArgumentConvertingMethodInvoker,
MethodInvoker
public class MethodInvoker (Code)
Helper class that allows for specifying a method to invoke in a declarative fashion, be it static or non-static.
Usage: Specify "targetClass"/"targetMethod" or "targetObject"/"targetMethod", optionally specify arguments, prepare the invoker. Afterwards, you may invoke the method any number of times, obtaining the invocation result.
Typically not used directly but via its subclasses org.springframework.beans.factory.config.MethodInvokingFactoryBean and org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean .
author:
   Colin Sampaleanu
author:
   Juergen Hoeller
since:
   19.02.2004
See Also:   MethodInvoker.prepare
See Also:   MethodInvoker.invoke
See Also:   org.springframework.beans.factory.config.MethodInvokingFactoryBean
See Also:   org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean

Method Summary
protected Method findMatchingMethod()
     Find a matching method with the specified name for the specified arguments.
public Object[] getArguments()
     Retrun the arguments for the method invocation.
public Method getPreparedMethod()
     Return the prepared Method object that will be invoked.
public Class getTargetClass()
     Return the target class on which to call the target method.
public String getTargetMethod()
     Return the name of the method to be invoked.
public Object getTargetObject()
     Return the target object on which to call the target method.
public Object invoke()
     Invoke the specified method.
public boolean isPrepared()
     Return whether this invoker has been prepared already, i.e.
public void prepare()
     Prepare the specified method.
protected Class resolveClassName(String className)
     Resolve the given class name into a Class.
public void setArguments(Object[] arguments)
     Set arguments for the method invocation.
public void setStaticMethod(String staticMethod)
     Set a fully qualified static method name to invoke, e.g.
public void setTargetClass(Class targetClass)
     Set the target class on which to call the target method.
public void setTargetMethod(String targetMethod)
     Set the name of the method to be invoked.
public void setTargetObject(Object targetObject)
     Set the target object on which to call the target method.

Method Detail
findMatchingMethod
protected Method findMatchingMethod()(Code)
Find a matching method with the specified name for the specified arguments. a matching method, or null if none
See Also:   MethodInvoker.getTargetClass()
See Also:   MethodInvoker.getTargetMethod()
See Also:   MethodInvoker.getArguments()

getArguments
public Object[] getArguments()(Code)
Retrun the arguments for the method invocation.

getPreparedMethod
public Method getPreparedMethod() throws IllegalStateException(Code)
Return the prepared Method object that will be invoked.
Can for example be used to determine the return type. the prepared Method object (never null)
throws:
  IllegalStateException - if the invoker hasn't been prepared yet
See Also:   MethodInvoker.prepare
See Also:   MethodInvoker.invoke

getTargetClass
public Class getTargetClass()(Code)
Return the target class on which to call the target method.

getTargetMethod
public String getTargetMethod()(Code)
Return the name of the method to be invoked.

getTargetObject
public Object getTargetObject()(Code)
Return the target object on which to call the target method.

invoke
public Object invoke() throws InvocationTargetException, IllegalAccessException(Code)
Invoke the specified method.
The invoker needs to have been prepared before. the object (possibly null) returned by the method invocation,or null if the method has a void return type
throws:
  InvocationTargetException - if the target method threw an exception
throws:
  IllegalAccessException - if the target method couldn't be accessed
See Also:   MethodInvoker.prepare

isPrepared
public boolean isPrepared()(Code)
Return whether this invoker has been prepared already, i.e. whether it allows access to MethodInvoker.getPreparedMethod() already.

prepare
public void prepare() throws ClassNotFoundException, NoSuchMethodException(Code)
Prepare the specified method. The method can be invoked any number of times afterwards.
See Also:   MethodInvoker.getPreparedMethod
See Also:   MethodInvoker.invoke

resolveClassName
protected Class resolveClassName(String className) throws ClassNotFoundException(Code)
Resolve the given class name into a Class.
The default implementations uses ClassUtils.forName, using the thread context class loader.
Parameters:
  className - the class name to resolve the resolved Class
throws:
  ClassNotFoundException - if the class name was invalid

setArguments
public void setArguments(Object[] arguments)(Code)
Set arguments for the method invocation. If this property is not set, or the Object array is of length 0, a method with no arguments is assumed.

setStaticMethod
public void setStaticMethod(String staticMethod)(Code)
Set a fully qualified static method name to invoke, e.g. "example.MyExampleClass.myExampleMethod". Convenient alternative to specifying targetClass and targetMethod.
See Also:   MethodInvoker.setTargetClass
See Also:   MethodInvoker.setTargetMethod

setTargetClass
public void setTargetClass(Class targetClass)(Code)
Set the target class on which to call the target method. Only necessary when the target method is static; else, a target object needs to be specified anyway.
See Also:   MethodInvoker.setTargetObject
See Also:   MethodInvoker.setTargetMethod

setTargetMethod
public void setTargetMethod(String targetMethod)(Code)
Set the name of the method to be invoked. Refers to either a static method or a non-static method, depending on a target object being set.
See Also:   MethodInvoker.setTargetClass
See Also:   MethodInvoker.setTargetObject

setTargetObject
public void setTargetObject(Object targetObject)(Code)
Set the target object on which to call the target method. Only necessary when the target method is not static; else, a target class is sufficient.
See Also:   MethodInvoker.setTargetClass
See Also:   MethodInvoker.setTargetMethod

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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