Behavior of AudioSystem.getTargetFormats/getTargetEncodings/isConversionSupported contradicts each other.

The problem comes from the AudioSystem.getAudioInputStream and the code below:
        if (sourceStream.getFormat().matches(targetFormat)) {
            return sourceStream;
        }
Note that getTargetFormats/getTargetEncodings/isConversionSupported does not take into account that getAudioInputStream do not throw an expection in this case even for some custom AudioStream which is not supported by the converters.