it.amattioli.workstate.config.BeanShellHelper Maven / Gradle / Ivy
package it.amattioli.workstate.config;
import bsh.Interpreter;
import bsh.EvalError;
public class BeanShellHelper {
public static Interpreter i = new Interpreter();
private BeanShellHelper() {
}
/**
* Evaluate a BeanShell expression. This method interprets the string parameter
* as a BeanShell expression and returns the result.
*
* @param expr the string containing the evaluating expression
*
* @return the result of the expression evaluation
* @throws EvalError if the expression has errors
*
*/
public static Object evalExpr(String expr) throws EvalError {
String exprResult = "expressionResult";
StringBuffer code = new StringBuffer("Object ")
.append(exprResult)
.append(" = ")
.append(expr)
.append(";");
i.eval(code.toString());
return i.get(exprResult);
}
}