def __blob(self, obj=0):
assert self.has_table("blobtable"), "no blob table"
tabname, sql = self.table("blobtable")
fn = tempfile.mktemp()
fp = None
c = self.cursor()
try:
hello = ("hello", ) * 1024
c.execute(sql)
self.db.commit()
from java.io import FileOutputStream, FileInputStream, ObjectOutputStream, ObjectInputStream, ByteArrayInputStream
fp = FileOutputStream(fn)
oos = ObjectOutputStream(fp)
oos.writeObject(hello)
fp.close()
fp = FileInputStream(fn)
blob = ObjectInputStream(fp)
value = blob.readObject()
fp.close()
assert hello == value, "unable to serialize properly"
if obj == 1:
fp = open(fn, "rb")
else:
fp = FileInputStream(fn)
c.execute("insert into %s (a, b) values (?, ?)" % (tabname),
[(0, fp)], {1: zxJDBC.BLOB})
self.db.commit()
c.execute("select * from %s" % (tabname))
f = c.fetchall()
bytes = f[0][1]
blob = ObjectInputStream(ByteArrayInputStream(bytes)).readObject()
assert hello == blob, "blobs are not equal"
finally:
c.execute("drop table %s" % (tabname))
c.close()
self.db.commit()
if os.path.exists(fn):
if fp:
fp.close()
os.remove(fn)
def test_serialization(self):
s = set(range(5, 10))
output = ByteArrayOutputStream()
serializer = ObjectOutputStream(output)
serializer.writeObject(s)
serializer.close()
input = ByteArrayInputStream(output.toByteArray())
unserializer = ObjectInputStream(input)
self.assertEqual(s, unserializer.readObject())
def deserialize(filepath):
f = None
o = None
obj = None
try:
f = FileInputStream(filepath)
o = ObjectInputStream(f)
obj = o.readObject()
except:
syncPrintQ(sys.exc_info())
finally:
if f:
f.close()
if o:
o.close()
if obj is None:
syncPrintQ("Failed to deserialize object at " + filepath)
return obj
def loadModel(file):
s = ObjectInputStream(FileInputStream(file))
crf = s.readObject()
s.close()
return crf
def readInstanceList(fname):
s = ObjectInputStream(FileInputStream(fname))
instances = s.readObject()
s.close()
return instances
