Package com.github.toolarium.common.util

Class ReflectionUtil

java.lang.Object

com.github.toolarium.common.util.ReflectionUtil

public final class ReflectionUtil
extends Object

Defines the reflection utility.

Method Summary

Modifier and Type	Method	Description
<T> Object	callMethod(Object classInstance, String className, String methodName, Class<?>[] paramType, Object[] param)	Calls the given method on the given instance
void	disableAccessWarnings()	Disable access warnings
<T> Class<T>	getClassObject(String className)	Load a class by given name
static ReflectionUtil	getInstance()	Get the instance
<T> Method	getMethod(String className, String methodName, Class<?>[] paramType)	Gets the defined method back
boolean	isClassAvailable(String className)	Check if the given class exists
<T> T	newInstance(Class<T> clazz)	Create a new instance of a given class

Methods inherited from class java.lang.Object

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

Method Details

getInstance

public static ReflectionUtil getInstance()

Get the instance

Returns:

the instance

isClassAvailable

public boolean isClassAvailable(String className)
                         throws IllegalArgumentException

Check if the given class exists

Parameters:

className - the name of the class to check

Returns:

true if the class exists; otherwise false

Throws:

IllegalArgumentException - In case of an invalid class name

getClassObject

public <T> Class<T> getClassObject(String className)
                            throws IllegalArgumentException,
ClassNotFoundException

Load a class by given name

Type Parameters:

T - the generic type

Parameters:

className - the name of the class

Returns:

the loaded class

Throws:

IllegalArgumentException - In case of an invalid class name

ClassNotFoundException - in case of error

newInstance

public <T> T newInstance(Class<T> clazz)
                  throws IllegalArgumentException,
SecurityException,
InstantiationException,
IllegalAccessException

Create a new instance of a given class

Type Parameters:

T - the generic type

Parameters:

clazz - the class

Returns:

the instance

Throws:

IllegalArgumentException - In case of an invalid class name

SecurityException - in case of error

InvocationTargetException - in case of error

IllegalArgumentException - in case of error

IllegalAccessException - in case of error

InstantiationException - in case of error

getMethod

public <T> Method getMethod(String className,
 String methodName,
 Class<?>[] paramType)
                     throws SecurityException,
NoSuchMethodException,
ClassNotFoundException

Gets the defined method back

Type Parameters:

T - the generic type

Parameters:

className - the class name

methodName - the method name

paramType - the parameter type

Returns:

the method

Throws:

IllegalArgumentException - In case of an invalid class or method name

SecurityException - in case of error

NoSuchMethodException - in case of error

ClassNotFoundException - in case of error

callMethod

public <T> Object callMethod(Object classInstance,
 String className,
 String methodName,
 Class<?>[] paramType,
 Object[] param)
                      throws SecurityException,
NoSuchMethodException,
IllegalArgumentException,
IllegalAccessException,
InvocationTargetException,
ClassNotFoundException

Calls the given method on the given instance

Type Parameters:

T - the generic type

Parameters:

classInstance - the instance of the class where the method should be called

className - the name of the class

methodName - the method name

paramType - the parameter type

param - the parameter values

Returns:

the result

Throws:

SecurityException - in case of error

NoSuchMethodException - in case of error

InvocationTargetException - in case of error

IllegalAccessException - in case of error

IllegalArgumentException - in case of error

ClassNotFoundException - in case of error

disableAccessWarnings

public void disableAccessWarnings()

Disable access warnings