Represents a way of displaying a list of EntryInformation objects in a particular order. The order of sorting is a strategy that can be specified when the class is instantiated. The sorting strategy can be modified with a flag indicating whether the sort is reversed from normal (in this case, descending instead of ascending). More...

Collaboration diagram for Strategy_ShowEntries_Class:

Public Types
enum	SortOptions { ByName , ByAge , ByHeight }
	Identifies the different sorting strategies available. More...

Public Member Functions
	Strategy_ShowEntries_Class (SortOptions sortOption, bool reversedSort)
	Constructor.

void	ShowEntries (EntryInformation[] entries)
	Display the specified entries in sorted order. The order of the sort was established when the Strategy_ShowEntries_Class was instantiated.

Private Attributes
ISortEntries	_sortEntries
	The sorting strategy to use.

bool	_reversedSort
	Whether to reverse the normal order of the sort.

Detailed Description

Represents a way of displaying a list of EntryInformation objects in a particular order. The order of sorting is a strategy that can be specified when the class is instantiated. The sorting strategy can be modified with a flag indicating whether the sort is reversed from normal (in this case, descending instead of ascending).

In this particular approach, a class with a specific sorting strategy is created. It can be applied to any number of lists to achieve the specified sorting behavior as the sorting behavior cannot be changed once specified.

An alternative implementation would be to pass the choice of sorting strategy to the ShowEntries() method and instantiate the sorting class there. In this way, the list is sorted and displayed using the specified sorting strategy. The advantage of this approach is only one instance of the class is needed. The disadvantage is the need for two additional parameters that must be passed in all the time with the entries to be sorted (there might be places in the program where the sorting strategy is not known or is unavailable from the user).

Definition at line 84 of file Strategy_ShowEntries_Class.cs.

Member Enumeration Documentation

◆ SortOptions

enum SortOptions

Identifies the different sorting strategies available.

Enumerator
ByName	Sort alphabetically name in ascending order.
ByAge	Sort numerically by age in ascending order.
ByHeight	Sort numerically by height in ascending order.

Definition at line 89 of file Strategy_ShowEntries_Class.cs.

Constructor & Destructor Documentation

◆ Strategy_ShowEntries_Class()

Strategy_ShowEntries_Class	(	SortOptions	sortOption,
		bool	reversedSort
	)

inline

Constructor.

Parameters

sortOption	A value from the SortOptions enumeration indicating the sorting strategy to use.
reversedSort	true if the sort is to be reversed (descending); otherwise, sort in ascending order.

Definition at line 128 of file Strategy_ShowEntries_Class.cs.

References Strategy_ShowEntries_Class._reversedSort, Strategy_ShowEntries_Class._sortEntries, and Strategy_SortEntries_ClassFactory.Create().