java.lang.ArithmeticException: / by zero

[sousouki]

I want to use the API 'OGNL.getValue' get specific value from an object, some properties in the object have symbol ‘/’, the problem 'java.lang.ArithmeticException: / by zero' will occur when call the API 'OGNL.getValue', is there some solutions to solve this problem?

[Lukasz Lenart]

Could you give some example? It looks like you perform a double evaluation, in first step you collect data from properties, in the second evaluation of the result of collected data is performed.

[sousouki]

Could you give some example? It looks like you perform a double evaluation, in first step you collect data from properties, in the second evaluation of the result of collected data is performed.

The following code can reproduce this problem:

public static void main(String[] args) throws OgnlException {
    Map<String, Object> root = new HashMap<>();
    root.put("receive/borrow_time", "2022/01/05");
    Map context = Ognl.createDefaultContext(root, new DefaultMemberAccess());
    Object tree = Ognl.parseExpression("receive/borrow_time");
    Object value = Ognl.getValue(tree, context, root);
    System.out.println(value);
}

static class DefaultMemberAccess implements MemberAccess {
    @Override
    public Object setup(Map context, Object target, Member member, String propertyName) {
        Object result = null;
        if (isAccessible(context, target, member, propertyName)) {
            AccessibleObject accessible = (AccessibleObject) member;
            if (!accessible.isAccessible()) {
                result = Boolean.FALSE;
                accessible.setAccessible(true);
            }
        }
        return result;
    }

    @Override
    public void restore(Map context, Object target, Member member, String propertyName, Object state) {

    }

    @Override
    public boolean isAccessible(Map context, Object target, Member member, String propertyName) {
        return true;
    }
}

[Lukasz Lenart]

In such a case it isn't possible and I don't see an option how to change the behaviour.