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From "Matteo Trotta (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JEXL-125) Unable to invoke method with ObjectContext
Date Sun, 15 Jan 2012 18:53:39 GMT
Unable to invoke method with ObjectContext
------------------------------------------

                 Key: JEXL-125
                 URL: https://issues.apache.org/jira/browse/JEXL-125
             Project: Commons JEXL
          Issue Type: Bug
    Affects Versions: 2.1.1
         Environment: Java 1.6.0_20 on Windows 7
            Reporter: Matteo Trotta


Hi, I'm trying to invoke a method on Object context but I can't get it to work.
I don't know if it's a bug or I'm doing it wrong.

Here it is the code I'm using:

{code:title=JexlTest.java}
package it.test;

import org.apache.commons.jexl2.Expression;
import org.apache.commons.jexl2.JexlContext;
import org.apache.commons.jexl2.JexlEngine;
import org.apache.commons.jexl2.ObjectContext;
import org.junit.Test;

public class JexlTest {
    public static class Foo {
        public String method() {
            return "OK";
        }
    }
    @Test
    public void test() throws Exception {
        JexlEngine jexl = new JexlEngine();
        jexl.setStrict(true);
        Expression e = jexl.createExpression("method()");
        JexlContext jc = new ObjectContext<Foo>(jexl, new Foo());
        System.out.println(e.evaluate(jc));
    }
}
{code}

Here is the exception I'm getting:
{noformat}
org.apache.commons.jexl2.JexlException: it.test.JexlTest.test@19![0,8]: 'method();' method
error
	at org.apache.commons.jexl2.Interpreter.call(Interpreter.java:1078)
	at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:1100)
	at org.apache.commons.jexl2.parser.ASTMethodNode.jjtAccept(ASTMethodNode.java:18)
	at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:1317)
	at org.apache.commons.jexl2.parser.ASTReference.jjtAccept(ASTReference.java:18)
	at org.apache.commons.jexl2.Interpreter.interpret(Interpreter.java:232)
	at org.apache.commons.jexl2.ExpressionImpl.evaluate(ExpressionImpl.java:65)
	at it.test.JexlTest.test(JexlTest.java:21)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:274)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:242)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:58)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:240)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:48)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:233)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:303)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:71)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:202)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: org.apache.commons.jexl2.JexlException$Property: org.apache.commons.jexl2.ObjectContext.get@42![0,9]:
'#0.method;' inaccessible or unknown property #0
	at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:1341)
	at org.apache.commons.jexl2.parser.ASTReference.jjtAccept(ASTReference.java:18)
	at org.apache.commons.jexl2.JexlEngine.getProperty(JexlEngine.java:615)
	at org.apache.commons.jexl2.JexlEngine.getProperty(JexlEngine.java:587)
	at org.apache.commons.jexl2.ObjectContext.get(ObjectContext.java:42)
	at org.apache.commons.jexl2.Interpreter.call(Interpreter.java:1047)
{noformat}

Using a MapContext with variable "foo" set to 'new Foo()' and the expression "foo.method()"
gives no error.
Anyway for my use it's more practical a ObjectContext, as I have only one object in the context.

Thank you for very much and keep up the excellent work!

Matteo Trotta

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