It may not be perfect for every scenario but it works fairly well for what I need:
<cffunction name="copy" access="public" output="false">
<cfscript>
var params = getMetaData(this.init).parameters;
var i = 0;
var thisKey = "";
var args = structNew();
for(i=1;i LTE ArrayLen(params); i=i+1){
thisKey = params[i].name;
args[thisKey] = this[thisKey];
}
return createObject("component",getMetaData(this).name).init(argumentCollection = args);
</cfscript>
</cffunction>
Now, there are some limitations already, especially concerning properties that are objects. currently they aren't copied, they are just pointed at by reference. I will probably keep working on this till I resolve that issue (handling recursive copying).
But, for the time being this is a decent start.
well it turns out i was able to answer my own question:
<cffunction name="copy" access="public" output="false">
<cfreturn createObject("component",getMetaData(this).name).init(argumentCollection=variables.instance) />
</cffunction>
here is a link that tries to do more, and where I found out about the getmetadata method - however, the example code on the following page doesn't work as near as I can tell:
http://www.prismix.com/blog/archives/2004/08/coldfusion_cfc.cfm
becuase I couldn't reference the properties value of getMetaData(this)
If I figure out a way to actually reference the properties of an object as well I'll let you know.
BillOn Apr 1, 2005 2:53 PM, Jim Davis <[EMAIL PROTECTED]> wrote:----------------------------------------------------------I've been meaning to look into a generic clone method myself so this interests me as well.
As for getting the object type that's pretty simple using getMetaData() – but I think a true clone method will be more difficult than that.
Jim Davis
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Bill Rawlinson
Sent: Friday, April 01, 2005 2:26 PM
To: [email protected]
Subject: [CFCDev] dynamically identifying an objects TYPE
Is there a way in CF to identify an objects type on the fly.I have 47! gmail invites,want one? ----------------------------------------------------------
for instance, say I have a generic object that has some objects inheirited from it.
In the generic object I would like to put a generic "copy" method that would work sort of like this:
<cffunction name="copy" output="false" returntype="any" />
<cfset var objectType = this.type />
<cfreturn createObject("component",objectType).init(argumentCollection = variables.instance)) />
</cffunction>
this probably isn't possible, but I figured I would ask. It would be much cleaner to have this simple copy operation in the base class than having to basically duplicate it in each inheirited class.
thanks
Bill
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[EMAIL PROTECTED]
http://blog.rawlinson.us
I have 47! gmail invites,want one?
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http://blog.rawlinson.us
I have 47! gmail invites,want one?(¹ªÞ²æìr¸›yÛhq÷ zôèº{.nÇ+‰·¬zwZ?隊[hq÷ z÷ s:'zŠàÂ+a¶°¢·lº{.nÇ+‰·œ}Ç^½«-…ë.n7œ¶‡í…ç¦j)ADB Þ¾++ºvòP™¢w°Ã s:'zŠàjwlºšh®×?o …\z,¶)àà h²Ø§?Ê&Qv«r¯z‡í…à…7¯–+-ŠÆ¯j)ZnWš´pà šŠV«r¯yÊ&ýÇÜuëÜ}Ìè?ê+
