Error-could not create an instance of the custom function

Hello

I'm trying to implement an extension of the simple custom function OPM 10.2. Here is the code:
package com.oracle.determinations.examples;

import com.oracle.determinations.engine.CustomFunction;
import com.oracle.determinations.engine.EntityInstance;
import java.util.Random;

SerializableAttribute public class RandomFunction extends CustomFunction {}
public Object evaluate (EntityInstance entityInstance, Object [] items) {}

If (items [0] == null) {}
return 0;
} else {}
-Code to generate a random number
}
}
}

The xml extension is the following:
-< extension >
-< features >
-name of the function = "RandomFunction" type return = 'number' >
< name arg = "enterednumber" type = "number" / >
< Manager platform = 'java' class = "com.oracle.determinations.examples.RandomFunction" / > "
< Manager platform = "dotnet" class = "com.oracle.determinations.examples.RandomFunction" / > "
< / feature >
< / functions >
< / extension >

I placed the code extension xml under the Development\Extensions\Examples folder and the jar file named "JavaLibrary1" containing only the above mentioned code is under Development\Extensions\Examples\lib.

The rule that calls the custom function is as follows:
the random number = RandomFunction (figure)

I get the error "Unable to create year instance of com.oracle.determinations.examples.RandomFunction" when I debug the project.

Please tell me how to solve this problem.

Thank you
JAS

Received your email and found the problem. The problem is the custom .NET, function definition is invalid, and must be (or must be removed).

When you are debugging with screens, it uses a combination of dosages of Web for Java and the host of the debugger, which takes place in .NET. Although the modules runs into reality in the determinations of web, the debugger needs always to be able to open the modules locally for purposes of reflection (eg. obtaining a list of all possible attributes and the type of data). Even if the modules is not actually executed in .NET, it must therefore be loadable, which means that if you do not provide a custom function .NET Manager, it must be valid. This:

>

>

Does not appoint a .NET class, that's why the debugger complains. Delete this line (only the Manager of java leaving intact) and your example works.

>
You also mentioned that the random function is not a good choice, that means that the engine of dosage will not work with the random function?
>

Yes, a random function will not work because the engine must be (and is optimized to be) deterministic - same entry should always produce the same result.

It is difficult to imagine what you can in theory of random numbers for (otherwise), but if you don't need, you may either) front of seeds new sessions with random inputs as attributes of basic (requires customization of your host application, for example, web determinations) or b) generate the random number from other values in your modules such as the customer, name and date of birth. This should ensure that the same combination of inputs will result in the same number of 'random' each time.

Tags: Oracle Applications

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