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pass class method name as parameter to another method?
Hi -
I've got a circumstance where I need to pass the name of a class method to another method which would execute then passed method.
Example:
the class I'd want to call:
The class I'd pass the method name to...
so the call would be -
In case you're wondering why go to all this work?
I'd like to create a generic way to run class methods as batch processes from the console in prod to efficiently retrofit existing data - without littering the prod org with lots of one-time use code.
Looking forward to everyone's collective insights...
Thanks,
Steve
I've got a circumstance where I need to pass the name of a class method to another method which would execute then passed method.
Example:
the class I'd want to call:
public class1 {
public static void methodA() {
};
}
The class I'd pass the method name to...
public class2 {
public static void methodRunner(string methodName) {
run( class1.methodName() ); // call that would execute the method (TBD)
}
}
so the call would be -
class2.methodRunner( class1.methodA );
In case you're wondering why go to all this work?
I'd like to create a generic way to run class methods as batch processes from the console in prod to efficiently retrofit existing data - without littering the prod org with lots of one-time use code.
Looking forward to everyone's collective insights...
Thanks,
Steve
Apex is not a functional language at all. You have to deal with the classic OO design patterns like the Strategy pattern - defining a family of algorithms, enscapsulating each one and making them interchangeable and selectable at runtime.
https://developer.salesforce.com/page/Apex_Design_Patterns (https://developer.salesforce.com/page/Apex_Design_Patterns )
The best pattern for your need is the Command pattern (not explained in the link above).
https://en.wikipedia.org/wiki/Command_pattern
That is not your real need .
Javascript is almost a functional language and it is used for the controllers in Lightning.
https://salesforce.stackexchange.com/questions/11865/build-custom-batch-queue-to-centrally-manage-batches-circumvent-the-max-5-bat
Download the sample code and metadata of: Advanced Apex:
http://advancedapex.com/samplecode/
There is a "trick" using the reflection in Apex, brought to you by JSON (Dynamic Class Instantiation with JSON).
https://zachelrath.wordpress.com/2012/10/21/apex-reflection-brought-to-you-by-json/
There is no reflection api in Apex natively. https://success.salesforce.com/ideaView?id=08730000000BrVaAAK
There is just the system Type:
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_methods_system_type.htm
Regards
All Answers
Apex is not a functional language at all. You have to deal with the classic OO design patterns like the Strategy pattern - defining a family of algorithms, enscapsulating each one and making them interchangeable and selectable at runtime.
https://developer.salesforce.com/page/Apex_Design_Patterns (https://developer.salesforce.com/page/Apex_Design_Patterns )
The best pattern for your need is the Command pattern (not explained in the link above).
https://en.wikipedia.org/wiki/Command_pattern
That is not your real need .
Javascript is almost a functional language and it is used for the controllers in Lightning.
https://salesforce.stackexchange.com/questions/11865/build-custom-batch-queue-to-centrally-manage-batches-circumvent-the-max-5-bat
Download the sample code and metadata of: Advanced Apex:
http://advancedapex.com/samplecode/
There is a "trick" using the reflection in Apex, brought to you by JSON (Dynamic Class Instantiation with JSON).
https://zachelrath.wordpress.com/2012/10/21/apex-reflection-brought-to-you-by-json/
There is no reflection api in Apex natively. https://success.salesforce.com/ideaView?id=08730000000BrVaAAK
There is just the system Type:
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_methods_system_type.htm
Regards
Yes, the Advanced Apex book is fantastic and I love the Design Patterns paper as well.
Steve