> Obviously, your function names must be unique per CFM, so the > unique name for all functions is a concatenation of the CFM > name and the function name.
Indeed that is true, the problem comes when I'm trying to work out which CFM page contains the function: I'm performing the key generation from within the CFC, so it's a bit of a hassle to work out where the function "came from". Any way, the toString() method I provided initially basically does what you have stated, in a round about kind of way. > Here is a quick UDF (read not tested) that does what you need. > ... > return theName.hashCode(); That's not going to identify a function uniquely - the hashCode() method will return the hashcode for the theName variable, not for the function. If I called the method again with exactly the same value, it'd return a different hashcode. Saying that however, using hashCode() against the function directly _will_ work and also saves on the hash() call. I can replace the key generation line: <cfset key = this.KEYPREFIX & hash(myFuncRef.toString())> with the following, removing one method call per generation (not much, but I'm sure they'll all add up, especially as it's a crypto function call I'm removing) and guaranteeing the key is unique (and always the same) for that function: <cfset key = this.KEYPREFIX & myFuncRef.hashCode())> For those that are wondering, the hashCode() method is a java method implemented in the base Object class that all other classes extend from by default. By definition it is guaranteed to return a unique (integer) ID for each object and if the function is called on the same object more than once during the lifetime of the Java application (i.e. CFMX), the same hash code will be returned on each call. Generally, the unique ID is generated from the internal memory address of the given object. Additionally, the key generated by the hashCode() method is much shorter than using a hash(toString()) representation (8 or so bytes compared to 32) so storing the key in memory won't eat up so much RAM. Not exactly the biggest gain in the world but sometimes every byte counts... ;) Cheers for the pointer Matt, even if it wasn't exactly what you meant... ;) > You might also be interested in the following Java class That's cool, but surely the toString() method I stated returns (basically) this info anyway, but it is more relevant for the use I need because it also includes the sub-class for the function reference. Ta anyway - may well come in useful at some point! The question still remains, is this a sensible way to go? No one's come down on me like a ton of bricks so I'm guessing it's OK... Tim. ------------------------------------------------------- RAWNET LTD - Internet, New Media and ebusiness Gurus. Visit our new website at http://www.rawnet.com for more information about our company, or call us free anytime on 0800 294 24 24. ------------------------------------------------------- Tim Blair Web Application Engineer, Rawnet Limited Direct Phone : +44 (0) 1344 393 441 Switchboard : +44 (0) 1344 393 040 ------------------------------------------------------- This message may contain information which is legally privileged and/or confidential. If you are not the intended recipient, you are hereby notified that any unauthorised disclosure, copying, distribution or use of this information is strictly prohibited. Such notification notwithstanding, any comments, opinions, information or conclusions expressed in this message are those of the originator, not of rawnet limited, unless otherwise explicitly and independently indicated by an authorised representative of rawnet limited. ------------------------------------------------------- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Archives: http://www.houseoffusion.com/lists.cfm?link=t:4 Subscription: http://www.houseoffusion.com/lists.cfm?link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Signup for the Fusion Authority news alert and keep up with the latest news in ColdFusion and related topics. http://www.fusionauthority.com/signup.cfm
