classwork.pp

Introduction

Units

Class Hierarchy

Classes, Interfaces, Objects and Records

Types

Variables

Constants

Functions and Procedures

Identifiers

Classes hierarchy graph

Class AMappingEntry

DescriptionHierarchyFieldsMethodsProperties

Unit

classwork

Declaration

type AMappingEntry = class(AStringLeaf)

Description

This class represents a mapping entry, which is an item that is indexed by a string key and which maps that key to a value. The base class places no restrictions on the type of value that can be represented by the entry; it stipulates only that descendant classes must provide a way to represent that value as a string.

Hierarchy

Overview

Methods

Public function implode(delimiter: string = ''): AnsiString; virtual;
Public function toString: AnsiString; override;
Public function valueAsString: string; virtual; abstract;

Description

Methods

Public function implode(delimiter: string = ''): AnsiString; virtual;

Implode the entry into a string that contains a key/value pair, where the key and value are separated by delimiter.

This method calls Self.name to obtain the value of the entry's string key and AMappingEntry.valueAsString to obtain the entry's present value.

If delimiter is not specified by the caller, or if it is an empty string, then the value of mapDefaultDelimiter is used.

Public function toString: AnsiString; override;

Construct and return a string representation of the entry, suitable for printing to a text-based device, such as a console.

In accordance with the criteria described by APrintingObject.toString, the string representation returned by this method will include the name of the entry (returned by a call to ADictionaryEntry.name) and a string representation of its value (returned by a call to Variants.varToStr), separated by the delimiter specified in mapDefaultDelimiter. This string is obtained by calling AMappingEntry.implode.

Public function valueAsString: string; virtual; abstract;

Return the value of the mapping entry as a string. This method must be implemented by descendant classes.

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