[6.3.x] Fix AMQP Object message decompression (#2256) - #2260
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This fixes the AmqpMessageSupport utility to correctly decompress the body of Object Message's in all cases. Previously the decompression could stop early and not decompress the entire stream of data. This was due to the loop incorrectly casting the read int from the inflater stream as a byte before comparing to -1 to look for end of stream. This is incorrect because the read() method can return a value between -1 and 255. Java uses Two's Complement to represent signed ints, so if the returned value int is 255 and is cast to a byte it becomes -1. This meant that reading 255 would return -1 leading to the code to exit thinking end of stream has been reached. (cherry picked from commit 2d60a85)
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This fixes the AmqpMessageSupport utility to correctly decompress the body of Object Message's in all cases.
Previously the decompression could stop early and not decompress the entire stream of data. This was due to the loop incorrectly casting the read int from the inflater stream as a byte before comparing to -1 to look for end of stream.
This is incorrect because the read() method can return a value between -1 and 255. Java uses Two's Complement to represent signed ints, so if the returned value int is 255 and is cast to a byte it becomes -1. This meant that reading 255 would return -1 leading to the code to exit thinking end of stream has been reached.
(cherry picked from commit 2d60a85)