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https://issues.apache.org/jira/browse/JEXL-62?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebb resolved JEXL-62.
----------------------
Resolution: Fixed
URL: http://svn.apache.org/viewvc?rev=799903&view=rev
Log:
JEXL-62
Avoid NPE in Interpreter when () omitted from method with no parameters (e.g.
var.hashCode)
Includes test case.
> NPE in Interpreter
> ------------------
>
> Key: JEXL-62
> URL: https://issues.apache.org/jira/browse/JEXL-62
> Project: Commons JEXL
> Issue Type: Bug
> Reporter: Sebb
> Fix For: 2.0
>
> Attachments: JEXL-62.patch
>
>
> The following Jexl code script works OK, both for createExpression() +
> evaluate(), and createScript() + execute():
> {code}
> JexlEngine jexl = new JexlEngine();
> JexlContext ctxt = JexlHelper.createContext();
> ctxt.getVars().put("dummy", "abcd");
> script="dummy.hashCode()"
> jexl.createScript(script).execute(ctxt); // OK
> script="dummy.hashCode()"
> jexl.createExpression(script).evaluate(ctxt); // OK
> {code}
> However, both methods of calling Jexl fail with NPE when the script is
> changed to
> {code}
> script = "dummy.hashCode"
> {code}
> {code}
> java.lang.NullPointerException
> at org.apache.commons.jexl.Interpreter.visit(Interpreter.java:890)
> at
> org.apache.commons.jexl.parser.ASTReference.jjtAccept(ASTReference.java:17)
> at org.apache.commons.jexl.Interpreter.visit(Interpreter.java:912)
> at
> org.apache.commons.jexl.parser.ASTReferenceExpression.jjtAccept(ASTReferenceExpression.java:17)
> at org.apache.commons.jexl.Interpreter.visit(Interpreter.java:624)
> at
> org.apache.commons.jexl.parser.ASTJexlScript.jjtAccept(ASTJexlScript.java:17)
> at org.apache.commons.jexl.Interpreter.interpret(Interpreter.java:157)
> at org.apache.commons.jexl.ScriptImpl.execute(ScriptImpl.java:49)
> java.lang.NullPointerException
> at org.apache.commons.jexl.Interpreter.visit(Interpreter.java:890)
> at
> org.apache.commons.jexl.parser.ASTReference.jjtAccept(ASTReference.java:17)
> at org.apache.commons.jexl.Interpreter.visit(Interpreter.java:912)
> at
> org.apache.commons.jexl.parser.ASTReferenceExpression.jjtAccept(ASTReferenceExpression.java:17)
> at org.apache.commons.jexl.Interpreter.interpret(Interpreter.java:157)
> at
> org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:63)
> {code}
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