ToStringHelper

java.lang.Object

provided.listFW.visitors.ToStringHelper

All Implemented Interfaces:: IListAlgo

class ToStringHelper extends Object implements IListAlgo

Helps ToStringAlgo compute the String representation of the rest of the list. This is the recursive part of the forward accumulation algorithm.

Field Summary

Fields

Modifier and Type

Field

Description

static ToStringHelper

Singleton

Singleton instance of helper algo
Constructor Summary

Constructors

Modifier

Constructor

Description

private

ToStringHelper()

Private constructor for Singleton
Method Summary

Modifier and Type

Method

Description

Object

emptyCase(MTList host, Object... acc)

Returns the accumulated String + ")".

Object

nonEmptyCase(NEList host, Object... acc)

Continues accumulating the String representation by appending ", " + first to acc and recurse!

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- Singleton
  
  public static final ToStringHelper Singleton
  
  Singleton instance of helper algo
Constructor Details
- ToStringHelper
  
  private ToStringHelper()
  
  Private constructor for Singleton
Method Details
- emptyCase
  
  public Object emptyCase(MTList host, Object... acc)
  
  Returns the accumulated String + ")". At end of list: done!
  
  Specified by:
  
  emptyCase in interface IListAlgo
  
  Parameters:
  
  acc - acc[0] is the accumulated String representation of the preceding list.
  
  host - the MTList that is executing this algorithm.
  
  Returns:
  
  String
- nonEmptyCase
  
  public Object nonEmptyCase(NEList host, Object... acc)
  
  Continues accumulating the String representation by appending ", " + first to acc and recurse!
  
  Specified by:
  
  nonEmptyCase in interface IListAlgo
  
  Parameters:
  
  acc - acc[0] is the accumulated String representation of the preceding list.
  
  host - the NEList that is executing this algorithm
  
  Returns:
  
  the String representation of the list.