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/*----------------------------------------------------------------------------*/
/* */
/* Copyright (c) 2011-2013 Rexx Language Association. All rights reserved. */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the Common Public License v1.0 which accompanies this */
/* distribution. A copy is also available at the following address: */
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/* */
/* Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
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/* */
/*----------------------------------------------------------------------------*/
/* ooDialog User Guide
Exercise07 The WowData component. v02-00 21Jan13
Contains: Classes: WowData.
Pre-requisites: None.
Description: The data component of the "Words of Wisdom" app.
Changes:
v01-00 31May12: First version.
v02-00 06Sep12: Second version - modified to use the Model-View Framework (MVF)
21Jan13: Updated comments. No change in funtion.
------------------------------------------------------------------------------*/
/*//////////////////////////////////////////////////////////////////////////////
==============================================================================
WowData v02-00 13Feb13
-------
Has access to WOW data, and returns a set to requester.
Potential enhancement: Define the size of a set through configuration.
Changes:
v01-01 31May12: First version.
v02-00 06Sep12: Second version - modified to use the Model-View Framework (MVF)
13Feb13: Changes to comments only.
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = */
::REQUIRES "..\Support\GenericFile.rex" -- MVF
--::CLASS WowData PUBLIC
::CLASS WowData SUBCLASS GenericFile PUBLIC -- v01-00-->MVF
::ATTRIBUTE created CLASS -- MVF
/*----------------------------------------------------------------------------
newInstance - creates an instance of WowData. Since all data
components are singletons, MVF applies the instance
name "The".
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
::METHOD newInstance CLASS PUBLIC -- MVF
use strict arg instanceName -- the instanceName is "The".
if self~created = "CREATED" then do -- if not yet created
WowDataId = self~new()
return WowDataId
end
else do -- if already created, then error.
say ".WowData-newInstance-01 - Error: singleton component, so can't have more than one instance."
return .false
end
/*----------------------------------------------------------------------------
init - asks super to read the file from disk.
Returns the number of records (exclusing the colums headers line)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
::METHOD init -- MVF
expose filename records
filename = "..\Samples\Wow4\WowFile.txt"; columns = 1
records = self~init:super(fileName, columns)
return self
/*----------------------------------------------------------------------------
getRecord - asks super to read the file from disk.
Normally for a 'named' component, MVF invokes 'getRecord'
to ask the Data component for a single record (handled by the
'GenericFile' superclass). For a ListModel, MVF invokes 'getFile'
to get the whole file to display in a list.
Here, although WowModel is a Model, not a ListModel, we want the
whole file. And GenericFile holds the file in its 'fileAsDirectory'
attribute. So we intercept the 'getRecord' message, and return
the file.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
::METHOD getRecord PUBLIC -- MVF
return self~fileAsDirectory
/*----------------------------------------------------------------------------
activate - Not used for a Data component in MVF v01-00
reads initial Wow Set from disk (but not in this version)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* ::METHOD activate
expose arrWow
arrWow = .array~new
arrWow[1] = "Agnes Allen's Law:" -
"Almost anything is easier to get into than out of."
arrWow[2] = "Airplane Law:" -
"When the plane you are on is late," -
"the plane you want to transfer to is on time."
arrWow[3] = "Fourteenth Corollary of Atwood's General Law of Dynamic Negatives:" -
"No books are lost by loaning" -
"except those you particularly wanted to keep."
arrWow[4] = "Baker's Byroad: When you're over the hill, you pick up speed."
arrWow[5] = "First Law of Bicycling:" -
"No matter which way you ride, it's uphill and against the wind."
arrWow[6] = "Brooks's Law:" -
"Adding manpower to a late software project makes it later."
arrWow[7] = "Grossman's Misquote of H. L. Mencken:" -
"Complex problems have simple, easy-to-understand wrong answers."
return */
/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/*----------------------------------------------------------------------------
readWowSet - returns the Wow set as an array. v01-00
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
--::METHOD readWowSet
--expose arrWow
--return arrWow
/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/*============================================================================*/