Package com.sun.jdo.spi.persistence.utility

Class JavaTypeHelper

java.lang.Object

com.sun.jdo.spi.persistence.utility.JavaTypeHelper

Direct Known Subclasses:

JavaClassWriterHelper

public class JavaTypeHelper
extends Object

This is a helper class which provides some basic java type convenience methods: extraction of a package from a fully qualified class name, extraction of a short (non-qualified) name from a fully qualified class name, and various wrapper and primitive type methods.

Author:

Rochelle Raccah

Constructor Summary

Constructors

Constructor	Description
JavaTypeHelper()

Method Summary

Modifier and Type	Method	Description
static String	getPackageName(String className)	Returns the package portion of the specified class
static Class	getPrimitiveClass(String primitiveName)	Returns the primitive class associated with the supplied primitive type name.
static String	getPrimitiveName(Class wrapper)	Returns the name of the primitive type associated with the supplied wrapper class.
static String	getShortClassName(String className)	Returns the name of a class without the package name.
static Class	getWrapperClass(Class primitive)	Returns the wrapper class associated with the supplied primitive class.
static String	getWrapperName(String primitiveName)	Returns the name of the wrapper class associated with the supplied primitive type name.
static Boolean	valueOf(boolean flag)	Returns the Boolean wrapper object for true or false corresponding to the supplied argument.

Methods inherited from class java.lang.Object

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

Constructor Details

JavaTypeHelper

public JavaTypeHelper()

Method Details

getPackageName

public static String getPackageName(String className)

Returns the package portion of the specified class

Parameters:

className - the name of the class from which to extract the package

Returns:

package portion of the specified class

getShortClassName

public static String getShortClassName(String className)

Returns the name of a class without the package name. For example: if input = "java.lang.Object" , then output = "Object".

Parameters:

className - fully qualified classname

getWrapperClass

public static Class getWrapperClass(Class primitive)

Returns the wrapper class associated with the supplied primitive class.

Parameters:

primitive - the primitive class to be used for lookup.

Returns:

the associated wrapper class.

getPrimitiveClass

public static Class getPrimitiveClass(String primitiveName)

Returns the primitive class associated with the supplied primitive type name.

Parameters:

primitiveName - the name of the primitive to be used for lookup.

Returns:

the associated primitive class.

getWrapperName

public static String getWrapperName(String primitiveName)

Returns the name of the wrapper class associated with the supplied primitive type name.

Parameters:

primitiveName - the name of the primitive to be used for lookup.

Returns:

the associated wrapper class name.

getPrimitiveName

public static String getPrimitiveName(Class wrapper)

Returns the name of the primitive type associated with the supplied wrapper class.

Parameters:

wrapper - the wrapper class to be used for lookup.

Returns:

the associated primitive type name.

valueOf

public static Boolean valueOf(boolean flag)

Returns the Boolean wrapper object for true or false corresponding to the supplied argument. This is to provide a convenience method for this conversion but to prevent calling the Boolean constructor which has been determined to be unnecessary and a performance problem. JDK 1.4 provides such a method, but some of our code still works with JDK 1.3.

Parameters:

flag - the primitive boolean object to be translated to a Boolean wrapper.

Returns:

the associated true/false shared wrapper object