freish created JEXL-132:
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Summary: divide zero error and others
Key: JEXL-132
URL: https://issues.apache.org/jira/browse/JEXL-132
Project: Commons JEXL
Issue Type: Bug
Affects Versions: 2.0.1
Environment: JEXL2.0.1 jdk1.5.0_22
Reporter: freish
code snippet：
String exp;
Expression expression;
JexlEngine engine = new JexlEngine();
exp = "1/0";
expression = engine.createExpression(exp);
System.out.println(expression.evaluate(null));
this will print 0.0,shoud it indicate an error by throwing exception or return
value?
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code snippet：
exp = "1/0.0";
expression = engine.createExpression(exp);
System.out.println(expression.evaluate(null));
this will print 0.0 too,but in fact it should return Infinity.
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code snippet:
exp = "Math.abs(-1)";
expression = engine.createExpression(exp);
System.out.println(expression.evaluate(null));
I don't know whether this is a bug.JEXL cannot invoke java static method
directly,it will throw an exception
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code snippet:
exp = "a.abs(-1)";
class MyMath {
public double abs(double d) {
return Math.abs(d);
}
}
Object obj = new MyMath();
expression = engine.createExpression(exp);
MapContext c = new MapContext();
c.set("a", obj);
System.out.println(expression.evaluate(c));
er,this is very strange,if MyMath is not public(whether in a independent file
or not),it will return null;but if MyMath is a public class,it will behave
correctly
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