[Help-jel] Dot operators...

[Malik H]

Konstantin:

Thanks for your email to my colleage Prem. But it appears that We are still experiecing the problem. We are trying to dynamically evaluate java _expression_ like:

"someobject.isTrue()==true" where someObject is created and registered thru Dynamic lib registration.

Similarly we get the following compilitaiion error for String object:

COMPILATION ERROR :The name "String" is unknown.

String.toString()

Here is the entire code....Please help,...

package test;

import gnu.jel.*;

import gov.irs.efile.tfrp.dataModel.PTFResult;

 

public class JelTest {

public static void main(String[] args) {

// Set up the library

Class[] staticLib=new Class[1];

try {

staticLib[0]=Class.forName("java.lang.String");

} catch(ClassNotFoundException e) {

// Can't be ;)) ...... in java ... ;)

};

Class[] dynamicLib=new Class[1];

/*

PTFResult ptfResult = new PTFResult(0, true);

Object[] context = new Object[1];

context[0]=ptfResult;

dynamicLib[0]=ptfResult.getClass();

*/

String ptfResult = new String();

Object[] context = new Object[1];

context[0]=ptfResult;

dynamicLib[0]=ptfResult.getClass();

Library lib=new Library(null,dynamicLib,new Class[0],null,null);

try {

lib.markStateDependent("random",null);

} catch (Exception e) {

// Can't be also

};

String testStr = "abc";

//DVMap resolver = new DVMap();

//PTFResult ptfResult = new PTFResult(0, true);

//

//String expr = "\"abc\".length()==3";

String expr = "testStr.toString()";///"ptfResult.getIsValid()==true";

//String expr = "PTFResult.getIsValid()==true";

CompiledExpression expr_c=null;

try {

expr_c=Evaluator.compile(expr,lib);

} catch (CompilationException ce) {

System.err.print("COMPILATION ERROR :");

System.err.println(ce.getMessage());

System.err.print(" ");

System.err.println(expr);

int column=ce.getColumn(); // Column, where error was found

for(int i=0;i<column+23-1;i++) System.err.print(' ');

System.err.println('^');

}

if (expr_c != null) {

// Evaluate (Can do it now any number of times FAST !!!)

Boolean result=null;

try {

result=(Boolean)expr_c.evaluate(null);

} catch (Throwable e) {

System.err.println("Exception emerged from JEL compiled"+

" code (IT'S OK) :");

System.err.print(e);

}

System.err.println("result = " + result);

}

}

}

 

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