Package com.thebuzzmedia.exiftool.commons.reflection

Class ClassUtils

java.lang.Object

com.thebuzzmedia.exiftool.commons.reflection.ClassUtils

public final class ClassUtils
extends Object

Static Class Utilities.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ClassUtils.ReflectionException

Method Summary

Modifier and Type	Method	Description
static MethodHandle	findMethod(Class<?> klass, String methodName, Class<?> returnType, Class<?>... parameterTypes)	Find non static method with given return type parameter types on given class.
static MethodHandle	findStaticMethod(Class<?> klass, String methodName, Class<?> returnType, Class<?>... parameterTypes)	Find static method with given return type parameter types on given class.
static Object	invoke(MethodHandle method, Object target, Object... args)	Invoke given method.
static Object	invokeStatic(MethodHandle method, Object... args)	Invoke given static method.
static boolean	isPresent(String klass)	Check if given class is available on classpath.
static Class<?>	lookupClass(String klass)	Get given class if available on classpath, otherwise throw ClassUtils.ReflectionException.

Methods inherited from class java.lang.Object

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

Method Details

lookupClass

public static Class<?> lookupClass(String klass)

Get given class if available on classpath, otherwise throw ClassUtils.ReflectionException.

Parameters:

klass - Class name.

Returns:

The class instance if available.

Throws:

ClassUtils.ReflectionException - If given class is not found in the classpath.

findStaticMethod

public static MethodHandle findStaticMethod(Class<?> klass,
 String methodName,
 Class<?> returnType,
 Class<?>... parameterTypes)

Find static method with given return type parameter types on given class.

Parameters:

klass - The class.

methodName - The method name.

returnType - The method return type.

parameterTypes - Parameter types.

Returns:

The method.

Throws:

ClassUtils.ReflectionException - If given method does not exist.

ClassUtils.ReflectionException - If given method is not accessible.

findMethod

public static MethodHandle findMethod(Class<?> klass,
 String methodName,
 Class<?> returnType,
 Class<?>... parameterTypes)

Find non static method with given return type parameter types on given class.

Parameters:

klass - The class.

methodName - The method name.

returnType - The method return type.

parameterTypes - Parameter types.

Returns:

The method.

Throws:

ClassUtils.ReflectionException - If given method does not exist.

ClassUtils.ReflectionException - If given method is not accessible.

invokeStatic

public static Object invokeStatic(MethodHandle method,
 Object... args)

Invoke given static method.

Parameters:

method - The method to invoke.

args - Method parameters.

Returns:

The method result.

Throws:

ClassUtils.ReflectionException - If an error occurs while calling method.

invoke

public static Object invoke(MethodHandle method,
 Object target,
 Object... args)

Invoke given method.

Parameters:

method - The method to invoke.

target - The target instance.

args - Method parameters.

Returns:

The method result.

Throws:

ClassUtils.ReflectionException - If an error occurs while calling method.

isPresent

public static boolean isPresent(String klass)

Check if given class is available on classpath.

Parameters:

klass - Class name to check (FQN).

Returns:

True if class is available, false otherwise.