I am creating a simple plug-in to generate Fibonacci series. In my java code I h

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

Stefan Helzle — Wed, 29 Jun 2022 06:00:45 GMT

I am not sure why you reply to a 6 years old post, but find the documentation here:

docs.appian.com/.../extending-appian.html

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

rohithsas547494 — Wed, 29 Jun 2022 05:51:04 GMT

hi @zianf can you please learn me how to create plugin s in java code

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

zianf — Mon, 18 Jul 2016 15:36:49 GMT

ok also I tried one more thing and it worked for me. The ArrayList Object 'a' I converted into String i.e a.toString and stored this value in a variable and eventually returned that variable. My return type then changed to String

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

chetany — Mon, 18 Jul 2016 15:10:38 GMT

@zianf, in the return statement, use: return a.toArray(new Integer[a.size()]); No need to cast. Also, the returnType in @Function annotation is not necessary. It is deprecated.

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

zianf — Mon, 18 Jul 2016 14:09:09 GMT

my function appear in the expression rule. My java code for fibonacci series plugin is:

import java.util.ArrayList;

import org.apache.log4j.Logger;

import com.appiancorp.services.ServiceContext;
import com.appiancorp.suiteapi.expression.annotations.Function;
import com.appiancorp.suiteapi.expression.annotations.Parameter;
import com.appiancorp.suiteapi.type.AppianType;

@MathfunctionCategory
public class fibonacci {

          private static final Logger LOG = Logger.getLogger(fibonacci.class);

          @SuppressWarnings("deprecation")
          @Function(returnType=AppianType.ARRAY)
          public Integer[] fibonacci(ServiceContext sc, @Parameter(type=AppianType.INTEGER) int fibo) {
                    ArrayList<Integer> a = new ArrayList<Integer>();
                    int a0=0, a1=1;
                    a.add(a0);
                    a.add(a1);
                    int a2=0;
                    for(int i=2;i<fibo;i++)
                    {
                              a2=a0+a1;
                              a.add(a2);
                              a0=a1;
                              a1=a2;
                    }

                    return (Integer[]) a.toArray();
          }

}

I get the error:

Expression evaluation error : Unresolved compilation problem: Type mismatch: cannot convert from Object[] to Integer[]

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

chetany — Mon, 18 Jul 2016 14:03:42 GMT

@zianf, use Integer[] as the return type

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

zianf — Mon, 18 Jul 2016 14:00:00 GMT

@chetany what should i set my return type to then after using toArray()

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

chetany — Mon, 18 Jul 2016 11:49:26 GMT

As mentioned by Eduardo, the plugin deployment must have failed. In my experience, I have always encountered an error whenever I tried to return ArrayList. (The exact error is: Invalid Error: Unsupported Type: java.util.List...) You have to convert it back to an array. You could use the method .toArray() for converting the ArrayList to simple array, then return it.

RE: I am creating a simple plug-in to generate Fibonacci series. In my java code I h

Eduardo Fuentes — Mon, 18 Jul 2016 11:11:00 GMT

Did you see the successful installation message in the log after placing the JAR in the plugins folder? Looks like it failed to deploy.