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Posted to user@commons.apache.org by "Kukosa, Tomas" <to...@siemens-enterprise.com> on 2012/08/10 15:07:26 UTC
[jexl] empty() function crashes if called with int[]
Hi,
if the empty() function is called for variable containing int[] it causes an exception:
java.lang.ClassCastException: [I cannot be cast to [Ljava.lang.Object;
at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:715)
at org.apache.commons.jexl2.parser.ASTEmptyFunction.jjtAccept(ASTEmptyFunction.java:18)
at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:1364)
at org.apache.commons.jexl2.parser.ASTReturnStatement.jjtAccept(ASTReturnStatement.java:18)
at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:946)
at org.apache.commons.jexl2.parser.ASTJexlScript.jjtAccept(ASTJexlScript.java:38)
at org.apache.commons.jexl2.Interpreter.interpret(Interpreter.java:232)
at org.apache.commons.jexl2.ExpressionImpl.execute(ExpressionImpl.java:107)
See the example below.
BTW how an empty map could be created? The {} literal is not valid jexl syntax.
Best regards,
Tomas
---------------------------------
public class Test04 {
private final static String[] SCRIPTS = {
"var x = null; return empty(x);",
"var x = ''; return empty(x);",
"var x = 'abc'; return empty(x);",
"var x = 0; return empty(x);",
"var x = 333; return empty(x);",
"var x = []; return empty(x);",
"var x = [1, 2]; return empty(x);", // === ERROR ===
"var x = ['a', 'b']; return empty(x);",
// "var x = {}; return empty(x);",
"var x = {1:'A', 2:'B'}; return empty(x);",
};
public static void main(String[] args) {
JexlEngine jexl = new JexlEngine();
JexlContext jc = new MapContext();
Script script;
for (String stext : SCRIPTS) {
System.out.println(stext);
script = jexl.createScript(stext);
try {
Object ret = script.execute(jc);
System.out.println(ret);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
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Re: [jexl] empty() function crashes if called with int[]
Posted by henrib <he...@apache.org>.
Hi,
The empty map syntax is { : } .
May I suggest you create issues within Jira with your test cases, it might
ease getting them solved & released.
Btw, I've committed solutions for your last 2 problems in jexl(3) trunk.
Regards
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RE: [jexl] empty() function crashes if called with int[]
Posted by Martin Gainty <mg...@hotmail.com>.
{}
create the HashMap first with 0 entries
http://docs.oracle.com/javase/6/docs/api/java/util/HashMap.html
Objects are not primitive types and vice versa
Initialise ints as Integer first
new Integer(intValue);
Martin Gainty
______________________________________________
Jogi és Bizalmassági kinyilatkoztatás/Verzicht und Vertraulichkeitanmerkung/Note de déni et de confidentialité
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készítése nem megengedett. Ez az üzenet csak ismeret cserét szolgál és
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> From: tomas.kukosa@siemens-enterprise.com
> To: user@commons.apache.org
> Subject: [jexl] empty() function crashes if called with int[]
> Date: Fri, 10 Aug 2012 13:07:26 +0000
>
> Hi,
>
> if the empty() function is called for variable containing int[] it causes an exception:
>
> java.lang.ClassCastException: [I cannot be cast to [Ljava.lang.Object;
> at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:715)
> at org.apache.commons.jexl2.parser.ASTEmptyFunction.jjtAccept(ASTEmptyFunction.java:18)
> at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:1364)
> at org.apache.commons.jexl2.parser.ASTReturnStatement.jjtAccept(ASTReturnStatement.java:18)
> at org.apache.commons.jexl2.Interpreter.visit(Interpreter.java:946)
> at org.apache.commons.jexl2.parser.ASTJexlScript.jjtAccept(ASTJexlScript.java:38)
> at org.apache.commons.jexl2.Interpreter.interpret(Interpreter.java:232)
> at org.apache.commons.jexl2.ExpressionImpl.execute(ExpressionImpl.java:107)
>
> See the example below.
>
>
> BTW how an empty map could be created? The {} literal is not valid jexl syntax.
>
> Best regards,
> Tomas
>
> ---------------------------------
> public class Test04 {
>
> private final static String[] SCRIPTS = {
> "var x = null; return empty(x);",
> "var x = ''; return empty(x);",
> "var x = 'abc'; return empty(x);",
> "var x = 0; return empty(x);",
> "var x = 333; return empty(x);",
> "var x = []; return empty(x);",
> "var x = [1, 2]; return empty(x);", // === ERROR ===
> "var x = ['a', 'b']; return empty(x);",
> // "var x = {}; return empty(x);",
> "var x = {1:'A', 2:'B'}; return empty(x);",
> };
>
> public static void main(String[] args) {
> JexlEngine jexl = new JexlEngine();
> JexlContext jc = new MapContext();
> Script script;
>
> for (String stext : SCRIPTS) {
> System.out.println(stext);
> script = jexl.createScript(stext);
> try {
> Object ret = script.execute(jc);
> System.out.println(ret);
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
>
> }
>
> }
>
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> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> For additional commands, e-mail: user-help@commons.apache.org
>