def readCharacter(self):
"""
:rtype int
"""
if (not self.pushBackChar.is_empty()):
return self.pushBackChar.pop()
try:
c = NonBlockingReader.READ_EXPIRED;
s = 0;
while (c == NonBlockingReader.READ_EXPIRED):
c = self.reader.read()
if (c >= 0 and Character.isHighSurrogate(c)):
s = c
c = NonBlockingReader.READ_EXPIRED
return Character.toCodePoint(s, c) if s != 0 else c
except:
# TODO: Exception
pass
