uk.ac.starlink.util
Class WrapUtils

java.lang.Object
  uk.ac.starlink.util.WrapUtils

public class WrapUtils
extends java.lang.Object

Utilities relating to the Wrapper class.

Since:

3 Apr 2008

Method Summary

static java.lang.Object	getWrapped(java.lang.Object obj) Returns the object on which a given object is based.
static java.lang.Object	getWrapped(java.lang.Object obj, java.lang.Class<?> clazz) Attempts to return an object of a given class on which a given object is based.

Methods inherited from class java.lang.Object

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

Method Detail

getWrapped

public static java.lang.Object getWrapped(java.lang.Object obj)

Returns the object on which a given object is based. If obj is a Wrapper, it is unwrapped as far as possible and the base object is returned. Otherwise obj itself is returned.

Parameters:

obj - test object

Returns:

ultimate base object of obj

getWrapped

public static java.lang.Object getWrapped(java.lang.Object obj,
                                          java.lang.Class<?> clazz)

Attempts to return an object of a given class on which a given object is based. An object is unwrapped (see Wrapper.getBase()) until an object of class clazz is found, at which point it is returned. If no clazz object can be found, null is returned.

Parameters:

obj - test object

Returns:

object within the wrapping hierarchy of class clazz, or null