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  1. Commons JEXL
  2. JEXL-125

Unable to invoke method with ObjectContext

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.1.1
    • Fix Version/s: 3.0
    • Labels:
      None
    • Environment:

      Java 1.6.0_20 on Windows 7

      Description

      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:

      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));
          }
      }
      

      Here is the exception I'm getting:

      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)
      

      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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            • Assignee:
              henrib Henri Biestro
              Reporter:
              mtrotta Matteo Trotta
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              • Created:
                Updated:
                Resolved: