Package com.sun.enterprise.admin.util

Class ClassUtil

java.lang.Object

com.sun.enterprise.admin.util.ClassUtil

public final class ClassUtil
extends Object

Various utilities used for classes.

Method Summary

Modifier and Type	Method	Description
static boolean	classIsArray(Class theClass)	Test whether a Class is an array
static boolean	classnameIsArray(String classname)	Test whether a classname is an array
static boolean	classnameIsPrimitiveArray(String classname)	Test whether a classname is a primitive array
static Class	convertArrayClass(Class arrayClass, Class newInnerType)	Convert inner element.
static String	expandClassName(String name)
static Class	getArrayElementClass(Class arrayClass)
static String	getArrayMemberClassName(String classname)	Get the classname for an array element.
static Class	getClassFromName(String classname)	Get a Class from a classname.
static String	getFriendlyClassname(Class theClass)
static String	getFriendlyClassname(String type)
static Class	getInnerArrayElementClass(Class arrayClass)
static char	getPrimitiveArrayTypeCode(Class theClass)	Return the primitive element type code for an array of primitive types.
static char	getPrimitiveArrayTypeCode(String classname)	Return the primitive element type code for an array of primitive types.
static String[]	getTypes(Object[] args)
static Object	instantiateDefault(Class inClass)	Given a Class, create a new instance with an empty constructor.
static Object	instantiateFromString(Class theClass, String theString)	Given a Class and a String, create a new instance with a constructor that accept a String.
static Object	instantiateObject(Class theClass, Object[] args)
static Object	instantiateObject(Class theClass, String theString)
static boolean	isPrimitiveClass(Class theClass)	Test whether a class is a primitive class.
static boolean	objectIsArray(Object o)	Test whether an Object is an array
static boolean	objectIsPrimitiveArray(Object o)	Test whether an Object is an array of primitive types
static Class	primitiveClassToObjectClass(Class theClass)	Map primitive class Classes to Object forms eg int.class to Integer.class
static String	primitiveLetterToClassName(char primitive)
static boolean	signaturesAreCompatible(Class[] callee, Class[] argsSignature)	Return true if caller signature is compatible with callee.

Methods inherited from class java.lang.Object

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

Method Detail

objectIsArray

public static boolean objectIsArray(Object o)

Test whether an Object is an array

Parameters:

o - object to test

Returns:

true if the object is an array, false otherwise.

classIsArray

public static boolean classIsArray(Class theClass)

Test whether a Class is an array

Parameters:

theClass - class to test

Returns:

true if the class is an array, false otherwise.

objectIsPrimitiveArray

public static boolean objectIsPrimitiveArray(Object o)

Test whether an Object is an array of primitive types

Parameters:

o - object to test

Returns:

true if the object is an array, false otherwise.

classnameIsArray

public static boolean classnameIsArray(String classname)

Test whether a classname is an array

Parameters:

classname - classname string

Returns:

true if the object is an array, false otherwise.

classnameIsPrimitiveArray

public static boolean classnameIsPrimitiveArray(String classname)

Test whether a classname is a primitive array

Parameters:

classname - classname string

Returns:

true if the object is a primitive array, false otherwise.

getPrimitiveArrayTypeCode

public static char getPrimitiveArrayTypeCode(Class theClass)

Return the primitive element type code for an array of primitive types. Same as getPrimitiveArrayTypeCode( theClass.getName() )

Parameters:

theClass - the Class object

Returns:

the element type code; otherwise (char)0

getPrimitiveArrayTypeCode

public static char getPrimitiveArrayTypeCode(String classname)

Return the primitive element type code for an array of primitive types.

Parameters:

classname - classname string

Returns:

the element type code; otherwise (char)0

getArrayMemberClassName

public static String getArrayMemberClassName(String classname)

Get the classname for an array element.

Parameters:

classname - classname string

Returns:

the classname for the array element

getClassFromName

public static Class getClassFromName(String classname)
                              throws ClassNotFoundException

Get a Class from a classname. Class.forName does not work for primitive types; this methods returns the correct Class for any type.

Parameters:

classname - classname string

Returns:

the classname for the array element

Throws:

ClassNotFoundException - if the class cannot be found

primitiveClassToObjectClass

public static Class primitiveClassToObjectClass(Class theClass)

Map primitive class Classes to Object forms eg int.class to Integer.class

Parameters:

theClass - the class to map

Returns:

the corresponding Object class or the original Class if not a primitive.

isPrimitiveClass

public static boolean isPrimitiveClass(Class theClass)

Test whether a class is a primitive class.

Parameters:

theClass - the class to test

Returns:

true if it's a primitive class, false otherwise.

primitiveLetterToClassName

public static String primitiveLetterToClassName(char primitive)

getTypes

public static String[] getTypes(Object[] args)

getFriendlyClassname

public static String getFriendlyClassname(Class theClass)

getFriendlyClassname

public static String getFriendlyClassname(String type)

getArrayElementClass

public static Class getArrayElementClass(Class arrayClass)

getInnerArrayElementClass

public static Class getInnerArrayElementClass(Class arrayClass)
                                       throws ClassNotFoundException

Throws:

ClassNotFoundException

signaturesAreCompatible

public static boolean signaturesAreCompatible(Class[] callee,
                                              Class[] argsSignature)

Return true if caller signature is compatible with callee.

Parameters:

callee - the signature of the method to be called

argsSignature - the signature of the argument list

instantiateObject

public static Object instantiateObject(Class theClass,
                                       Object[] args)
                                throws Exception

Throws:

Exception

instantiateObject

public static Object instantiateObject(Class theClass,
                                       String theString)
                                throws Exception

Throws:

Exception

instantiateFromString

public static Object instantiateFromString(Class theClass,
                                           String theString)
                                    throws Exception

Given a Class and a String, create a new instance with a constructor that accept a String. Primitive types are instantiated as their equivalent Object forms.

Parameters:

theClass - the class from which an instance should be instantiated

theString - the string to be supplied to the constructor

Throws:

Exception

instantiateDefault

public static Object instantiateDefault(Class inClass)
                                 throws Exception

Given a Class, create a new instance with an empty constructor. Primitive types are instantiated as their equivalent Object forms. Any value is acceptable in the newly created object.

Parameters:

inClass - the class from which an instance should be instantiated

Throws:

Exception

expandClassName

public static String expandClassName(String name)

convertArrayClass

public static Class convertArrayClass(Class arrayClass,
                                      Class newInnerType)
                               throws ClassNotFoundException

Convert inner element. Only works for arrays of Objects. Example: mapActualElementClass( "[[[LObject;", "Long" ) =>[[[LLong;

Throws:

ClassNotFoundException