Module hw06

Package provided.listFW.visitors

Class ToStringAlgo

java.lang.Object

provided.listFW.visitors.ToStringAlgo

All Implemented Interfaces:

IListAlgo

public class ToStringAlgo
extends Object
implements IListAlgo

Computes a String representation of IList showing a left parenthesis followed by elements of the IList separated by commas, ending with with a right parenthesis. Implemented as a forward accumulation algorithm.

Field Summary

Fields

Modifier and Type	Field	Description
static ToStringAlgo	Singleton	Singeton instance

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ToStringAlgo()	Private constructor for the Singleton

Method Summary

Modifier and Type	Method	Description
Object	emptyCase(MTList host, Object... nu)	Returns "()".
Object	nonEmptyCase(NEList host, Object... nu)	Passes "(" + first to the rest of IList and asks for help to complete the computation.

Methods inherited from class java.lang.Object

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

Field Details

Singleton

public static final ToStringAlgo Singleton

Singeton instance

Constructor Details

ToStringAlgo

private ToStringAlgo()

Private constructor for the Singleton

Method Details

emptyCase

public Object emptyCase(MTList host,
 Object... nu)

Returns "()".

Specified by:

emptyCase in interface IListAlgo

Parameters:

nu - not used

host - the MTList that is executing this algorithm.

Returns:

String

nonEmptyCase

public Object nonEmptyCase(NEList host,
 Object... nu)

Passes "(" + first to the rest of IList and asks for help to complete the computation.

Specified by:

nonEmptyCase in interface IListAlgo

Parameters:

nu - not used

host - the NEList that is executing this algorithm

Returns:

String