Package i5.las2peer.execution

Class ServiceHelper

java.lang.Object

i5.las2peer.execution.ServiceHelper

public abstract class ServiceHelper
extends Object

static helper methods for invocation of service methods via reflection

Constructor Summary

Constructors

Constructor	Description
ServiceHelper()

Method Summary

Modifier and Type	Method	Description
static Object	execute(Service service, String method)	Executes a service method.
static Object	execute(Service service, String method, Object... parameters)	Executes a service method.
static String	getParameterString(Object[] params)	Creates a string with all classes from an array of parameters.
static Class<?>	getUnwrappedClass(Class<?> c)	returns the native class for a wrapper
static Class<?>	getWrapperClass(Class<?> c)	returns the wrapper class for a native class
static boolean	isSubclass(Class<?> subClass, Class<?> superClass)	check, if the first given class is a subclass of the second one
static boolean	isWrapperClass(Class<?> c)	checks if the given class is a wrapper class for a java native
static Method	searchMethod(Class<? extends Service> serviceClass, String methodName, Object[] params)	Searches the service method fitting to the given parameter classes.

Methods inherited from class java.lang.Object

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

Constructor Details

ServiceHelper

public ServiceHelper()

Method Details

getWrapperClass

public static Class<?> getWrapperClass(Class<?> c)

returns the wrapper class for a native class

Parameters:

c - a Class

Returns:

a Class

isWrapperClass

public static boolean isWrapperClass(Class<?> c)

checks if the given class is a wrapper class for a java native

Parameters:

c - a Class

Returns:

a boolean

isSubclass

public static boolean isSubclass(Class<?> subClass,
 Class<?> superClass)

check, if the first given class is a subclass of the second one

Parameters:

subClass - A class to check

superClass - A super class to check

Returns:

true, if the first parameter class is a subclass of the second one

getUnwrappedClass

public static Class<?> getUnwrappedClass(Class<?> c)

returns the native class for a wrapper

Parameters:

c - a Class

Returns:

a Class

execute

public static Object execute(Service service,
 String method)
                      throws ServiceMethodNotFoundException,
IllegalArgumentException,
IllegalAccessException,
InvocationTargetException

Executes a service method.

Parameters:

service - A service to use

method - the service method

Returns:

result of the method invocation

Throws:

ServiceMethodNotFoundException - If the method was not found in the given class

IllegalArgumentException - Thrown to indicate that a method has been passed an illegal or inappropriate argument.

IllegalAccessException - if this Method object is enforcing Java language access control and the underlying method is inaccessible.

InvocationTargetException - if the underlying method throws an exception.

execute

public static Object execute(Service service,
 String method,
 Object... parameters)
                      throws ServiceMethodNotFoundException,
IllegalArgumentException,
IllegalAccessException,
InvocationTargetException

Executes a service method.

Parameters:

service - A service to use

method - the service method

parameters - A bunch of parameters

Returns:

result of the method invocation

Throws:

ServiceMethodNotFoundException - If the method was not found in the given class

IllegalArgumentException - Thrown to indicate that a method has been passed an illegal or inappropriate argument.

IllegalAccessException - if this Method object is enforcing Java language access control and the underlying method is inaccessible.

InvocationTargetException - if the underlying method throws an exception.

searchMethod

public static Method searchMethod(Class<? extends Service> serviceClass,
 String methodName,
 Object[] params)
                           throws ServiceMethodNotFoundException

Searches the service method fitting to the given parameter classes.

Parameters:

serviceClass - A service class to search in

methodName - the service method

params - A bunch of parameters

Returns:

a Method

Throws:

ServiceMethodNotFoundException - If the method was not found in the given class

getParameterString

public static String getParameterString(Object[] params)

Creates a string with all classes from an array of parameters.

Parameters:

params - A bunch of parameters

Returns:

a string describing a parameter list for the given actual parameters