Package de.gebit.integrity.operations.custom

Class CustomOperationWrapper

java.lang.Object

de.gebit.integrity.operations.custom.CustomOperationWrapper

public class CustomOperationWrapper
extends Object

The custom operation wrapper is used to wrap a custom operation class and instance for execution. The wrapper does perform class loading and instantiation.

Author:

Rene Schneider - initial API and implementation

Constructor Summary

Constructors

Constructor	Description
CustomOperationWrapper(CustomOperation anOperation, com.google.inject.Injector anInjector)	Creates a new wrapper instance.

Method Summary

Modifier and Type	Method	Description
protected Method	determineExecuteMethod()	Searches the operation class for the "execute" method, and returns the corresponding reflection method instance.
protected Class<?>	determinePostfixParameterTargetType()	Determines the type of the operation postfix parameter.
protected Class<?>	determinePrefixParameterTargetType()	Determines the type of the operation prefix parameter.
Object	executeOperation()	Executes the wrapped operation logic.

Methods inherited from class java.lang.Object

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

Constructor Detail

CustomOperationWrapper

public CustomOperationWrapper(CustomOperation anOperation,
                              com.google.inject.Injector anInjector)
                       throws ClassNotFoundException

Creates a new wrapper instance. This also loads the actual operation implementation class using the injected classloader.

Parameters:

anOperation - the operation to wrap

anInjector - the Guice injector (can't wait to inject it because we require stuff injected during construction)

Throws:

ClassNotFoundException - if the operations' class could not be found

Method Detail

executeOperation

public Object executeOperation()
                        throws UnexecutableException

Executes the wrapped operation logic.

Returns:

the result of the operation

Throws:

UnexecutableException - if the operation cannot be executed for any reason

determinePrefixParameterTargetType

protected Class<?> determinePrefixParameterTargetType()

Determines the type of the operation prefix parameter.

Returns:

the expected type

determinePostfixParameterTargetType

protected Class<?> determinePostfixParameterTargetType()

Determines the type of the operation postfix parameter.

Returns:

the expected type

determineExecuteMethod

protected Method determineExecuteMethod()

Searches the operation class for the "execute" method, and returns the corresponding reflection method instance.

Returns:

the method representation