So, I simply cannot gather access to values in constant static arrays.
Let this be an array in my code:
public static int[] MY_ARRAY;
And this is how i trying to access that array:
{{ constant("com.package.configs.MainConfig.MY_ARRAY")[0] }}
This attempt leads to an error:
java.lang.ClassCastException: [I cannot be cast to [Ljava.lang.Object;
at org.jtwig.value.convert.collection.ArrayToCollectionConverter.convert(ArrayToCollectionConverter.java:11)
at org.jtwig.value.convert.CompositeConverter.convert(CompositeConverter.java:15)
at org.jtwig.render.expression.calculator.MapSelectionExpressionCalculator.calculate(MapSelectionExpressionCalculator.java:19)
at org.jtwig.render.expression.calculator.MapSelectionExpressionCalculator.calculate(MapSelectionExpressionCalculator.java:12)
at org.jtwig.render.expression.CalculateExpressionService.calculate(CalculateExpressionService.java:14)
...
I also tried to assign a constant to variable first, then accessing it, but nothing changed.
Previously, in an older versions of JTwig i was able to access any public static field of a object that i passed to the model. But now such fields are being ignored.
The version i am using is 5.86.0. Any idea on how to beat this, or at this moment it's technically impossible?
The exception
java.lang.ClassCastException: [I cannot be cast to [Ljava.lang.Object;
means the array MY_ARRAY
is an int
-type array, and int
is a primitive , thus it's not a sub type of Object
, so you can not cast it to an Object -type array .
In this case, you can change MY_ARRAY
's Signature to public static Integer[] MY_ARRAY
.
Integer
wraps the int
value in an Object
.
This is illustrated by the following example:
public static void main(String args[]) {
int[] arr = new int[5];
Integer[] arrI = new Integer[5];
test(arr); // error:The method test(Object[]) in the type Demo is not applicable for the arguments (int[])
test(arrI); // ok
}
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