org.crosswire.common.util
Class CallContext

java.lang.Object
  org.crosswire.common.util.CallContext

public final class CallContext
extends Object

This singleton class provides a way for a method to determine which class called it.

It has been tested to work in command line and WebStart environments.

Author:

DM Smith

See Also:

The GNU Lesser General Public License for details.

Field Summary

private static int	CALL_CONTEXT_OFFSET Offset needed to represent the caller of the method that called this method.
private static CallContext	resolver

Constructor Summary

private

CallContext() Prevent instantiation

Method Summary

static Class<?>	getCallingClass() When called from a method it will return the class calling that method.
static Class<?>	getCallingClass(int i) When called from a method it will return the i-th class calling that method, up the call chain.
static CallContext	instance() Singleton accessor

Methods inherited from class java.lang.Object

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

Field Detail

CALL_CONTEXT_OFFSET

private static final int CALL_CONTEXT_OFFSET

Offset needed to represent the caller of the method that called this method.

See Also:

Constant Field Values

resolver

private static CallContext resolver

Constructor Detail

CallContext

private CallContext()

Prevent instantiation

Method Detail

instance

public static CallContext instance()

Singleton accessor

Returns:

this singleton

getCallingClass

public static Class<?> getCallingClass()

When called from a method it will return the class calling that method.

Returns:

the immediate calling class

getCallingClass

public static Class<?> getCallingClass(int i)

When called from a method it will return the i-th class calling that method, up the call chain. If used with a -1 it will return the class making the call -2 and -3 will return this class

Parameters:

i - the i-th coller

Returns:

the desired calling class

Throws:

ArrayIndexOutOfBoundsException - if the index is not valid