Package com.aspectran.core.util

Class ClassUtils

java.lang.Object

com.aspectran.core.util.ClassUtils

public abstract class ClassUtils
extends java.lang.Object

Miscellaneous class utility methods.

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	CLASS_FILE_SUFFIX	The ".class" file suffix
static char	PACKAGE_SEPARATOR_CHAR	The package separator character '.'

Constructor Summary

Constructors

Constructor	Description
ClassUtils()

Method Summary

Modifier and Type	Method	Description
static <T> T	createInstance(java.lang.Class<T> cls)	Method that can be called to try to create an instantiate of specified type.
static <T> T	createInstance(java.lang.Class<T> cls, java.lang.Object... args)	Method that can be called to try to create an instantiate of specified type.
static <T> java.lang.reflect.Constructor<T>	findConstructor(java.lang.Class<T> cls, java.lang.Class<?>... parameterTypes)	Obtain an accessible constructor for the given class and parameters.

Methods inherited from class java.lang.Object

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

Field Detail

PACKAGE_SEPARATOR_CHAR

public static final char PACKAGE_SEPARATOR_CHAR

The package separator character '.'

See Also:

Constant Field Values

CLASS_FILE_SUFFIX

public static final java.lang.String CLASS_FILE_SUFFIX

The ".class" file suffix

See Also:

Constant Field Values

Constructor Detail

ClassUtils

public ClassUtils()

Method Detail

createInstance

public static <T> T createInstance(java.lang.Class<T> cls)

Method that can be called to try to create an instantiate of specified type. Instantiation is done using default no-argument constructor.

Type Parameters:

T - the generic type

Parameters:

cls - the class to check

Returns:

an instantiated object

Throws:

java.lang.IllegalArgumentException - if instantiation fails for any reason; except for cases where constructor throws an unchecked exception (which will be passed as is)

createInstance

public static <T> T createInstance(java.lang.Class<T> cls,
                                   java.lang.Object... args)

Method that can be called to try to create an instantiate of specified type.

Type Parameters:

T - the generic type

Parameters:

cls - the class to check

args - the arguments

Returns:

an instantiated object

Throws:

java.lang.IllegalArgumentException - if instantiation fails for any reason; except for cases where constructor throws an unchecked exception (which will be passed as is)

findConstructor

public static <T> java.lang.reflect.Constructor<T> findConstructor(java.lang.Class<T> cls,
                                                                   java.lang.Class<?>... parameterTypes)
                                                            throws java.lang.NoSuchMethodException

Obtain an accessible constructor for the given class and parameters.

Type Parameters:

T - the generic type

Parameters:

cls - the class to check

parameterTypes - the parameter types of the desired constructor

Returns:

the constructor reference

Throws:

java.lang.NoSuchMethodException - if no such constructor exists