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Thread: Store a random C buffer inside a Java String

  1. #1
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    Default Store a random C buffer inside a Java String

    Hello,

    due to compatibility reasons, I need to be able to store a random C buffer inside of a Java String. THis means that the Java String should contain the exact same buffer information (i.e. byte sequence) as the original C buffer. How would I do that?

    All the functions I found will always somehow code/decode the C buffer, and modify its content depending on the selected encoding.

    I need to doo this inside JNI. Following is what I have:

    	unsigned char* cBuffer=getCBuffer();
     
    	// Transfer the C buffer to s:
    	jstring s=NULL;
       	if (env->EnsureLocalCapacity(2) >= 0)
    	{
    		jbyteArray bytes = env->NewByteArray(signalLength);
    		if (bytes != NULL) 
    		{
    			env->SetByteArrayRegion(bytes, 0, signalLength,(jbyte *)cBuffer);
    			jclass cls = env->FindClass("java/lang/String");
    			jmethodID mid = env->GetMethodID(cls, "<init>", "([B)V");
    			s = (jstring)env->NewObject(cls, mid, bytes);
    			env->DeleteLocalRef(bytes);
    		}
    	}

    Thanks for any help


  2. #2
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    Default Re: Store a random C buffer inside a Java String

    Welcome to the forum! Thanks for taking the time to learn how to post code correctly. If you haven't already, please read this topic to learn other useful info for new members.

    Requiring something to be or do something it simply cannot be or do is not a reasonable requirement. Instead, modify your requirement to decode/encode so that the buffer is represented appropriately for the situation.

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