lrs.visitor
Class GetNth

java.lang.Object
  lrs.visitor.GetNth

All Implemented Interfaces:

IAlgo

public class GetNth
extends java.lang.Object
implements IAlgo

Return the n'th element in the list.

Author:

Mathias Ricken

Field Summary

static GetNth

Singleton

Constructor Summary

private

GetNth()

Method Summary

java.lang.Object	emptyCase(LRStruct host, java.lang.Object inp) Operates on an empty LRStruct host, given an input object.
java.lang.Object	nonEmptyCase(LRStruct host, java.lang.Object inp) Operates on a non-empty LRStruct host, given an input object.

Methods inherited from class java.lang.Object

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

Field Detail

Singleton

public static final GetNth Singleton

Constructor Detail

GetNth

private GetNth()

Method Detail

emptyCase

public java.lang.Object emptyCase(LRStruct host,
                                  java.lang.Object inp)

Operates on an empty LRStruct host, given an input object.

Specified by:

emptyCase in interface IAlgo

Parameters:

host - an empty LRStruct.

inp - index of element

Returns:

nothing

Throws:

java.lang.IllegalArgumentException

nonEmptyCase

public java.lang.Object nonEmptyCase(LRStruct host,
                                     java.lang.Object inp)

Operates on a non-empty LRStruct host, given an input object.

Specified by:

nonEmptyCase in interface IAlgo

Parameters:

host - a non-empty LRStruct.

inp - index of element

Returns:

an n'th element