convert jobject to jboolean in JNI

[nitin1]

Hi,

I have one function (in a library I can't change the code) which takes a key and returns a Object. This code is written in java. I am calling this function from cpp code. I am accepting the result as jobject.

1. Added key as "key1" & value as boolean true by calling a function. it saves in a map after converting in into java BooleanObject.

2. When I get it back I get it back as Object. I want to compare it with true now. How can I do that?

   Thanks in advance.

[rproffitt]

OK, I'm going to assume you did some research on this so let's look at what Java does to convert the object to primitive boolean.

I'm reading http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/lang/Boolean.java

So there it is, it could be a string or a boolean in that object. Try your debugger to look at your variable returned.

[JamesCherrill]

I thought this question was how to handle a Java Object (that happens to be a Boolean) in cpp code?

If it's a Java question then you need to cast the Object to Boolean (maybe checking first that it is an instanceof Boolean). Java will handle conversion between a Boolean object and a boolean primitive (eg true) automatically - it's called unboxing