[Helma-user] accessing type.properties

[Breton Slivka]

Okay, to be more serious. I was actually quite stoked by your initial
email. Why? Because I didn't know you could programatically read
type.properties at all! You know what else you can do? You can set it
programatically. I immediately set out to write an example of replacing
type.properties with an Object Literal in javascript. That's as follows:


ArtworkType.js: 

jsonType(
"Artwork",
{	
	"_id" : "ARTWORK_ID",
	"_db" : GlobalDatabase,              // a global variable set
earlier.
	"artist": "ARTIST_ID",               
	"year": "YEAR",
	"title": "TITLE
});



Global.js:

function jsonType(prototypename, json) {
	
	var typeproperties =
app.getPrototype(prototypename).getTypeProperties();
	var i;
	for(i in json) {
		typeproperties.setProperty(i, json[i]);
	}

	return jsonType;  //This enables some nice chaining.
} 


 
>From here it's not that much of a leap to make the original "json"
object an array like so:

ArtworkType = [	
	{"_id" : "ARTWORK_ID"},
	{"_db" : GlobalDatabase},              // a global variable set
earlier.
	{"artist": "ARTIST_ID"},               
	{"year": "YEAR"},
	{"title": "TITLE}
]

Then modify the jsonType function accordingly:

jsonType("Artwork", ArtworkType)

And bam, you've got type.properties as a literal, throw away the
type.properties file.
And not only that, but you can then go on to query the ArtworkType
object to generate forms, in the order that you want, and everything is
specified in only one place.


-----Original Message-----
From: helma-user-bounces at helma.org [mailto:helma-user-bounces at helma.org]
On Behalf Of Joshua Paine
Sent: Thursday, 3 July 2008 12:56 PM
To: Helma User Mailing List
Subject: Re: [Helma-user] accessing type.properties

Breton Slivka wrote:
> In the spirit of idea generation, here's a very silly solution:

Maybe I should make it an explicit design goal that someone reading the
code should not have to consult wikipedia. :-)

> Once you convert a factoradic into a machine integer, it's *the* most 
> compact way of specifying the order of anything you'll find.

Except not having to specify it seperately at all, which is what being
able to read the type properties in order would get me.
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Breton Slivka
Assistant Multimedia Systems Developer

National Gallery of Victoria
180 St Kilda Road Melbourne Vic 3004 Australia
Telephone: +61 3 8620 2348 
Fax: +61 3 8620 2555
ngv.vic.gov.au

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