| 1 | """ |
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| 2 | Loading thread |
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| 3 | """ |
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| 4 | import time |
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| 5 | import sys |
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| 6 | import os |
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| 7 | |
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| 8 | from sas.sascalc.data_util.calcthread import CalcThread |
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| 9 | |
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| 10 | |
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| 11 | EXTENSIONS = ['.svs', '.prv', '.inv', '.fitv'] |
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| 12 | |
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| 13 | class DataReader(CalcThread): |
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| 14 | """ |
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| 15 | Load a data given a filename |
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| 16 | """ |
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| 17 | def __init__(self, path, loader, |
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| 18 | flag=True, |
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| 19 | transform_data=None, |
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| 20 | completefn=None, |
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| 21 | updatefn=None, |
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| 22 | yieldtime=0.01, |
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| 23 | worktime=0.01): |
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| 24 | CalcThread.__init__(self, completefn, |
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| 25 | updatefn, |
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| 26 | yieldtime, |
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| 27 | worktime) |
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| 28 | self.load_state_flag = flag |
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| 29 | self.transform_data = transform_data |
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| 30 | self.list_path = path |
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| 31 | # Instantiate a loader |
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| 32 | self.loader = loader |
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| 33 | self.message = "" |
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| 34 | self.starttime = 0 |
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| 35 | self.updatefn = updatefn |
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| 36 | |
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| 37 | def isquit(self): |
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| 38 | """ |
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| 39 | :raise KeyboardInterrupt: when the thread is interrupted |
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| 40 | """ |
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| 41 | try: |
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| 42 | CalcThread.isquit(self) |
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| 43 | except KeyboardInterrupt: |
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| 44 | raise KeyboardInterrupt |
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| 45 | |
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| 46 | def compute(self): |
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| 47 | """ |
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| 48 | read some data |
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| 49 | """ |
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| 50 | self.starttime = time.time() |
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| 51 | output = [] |
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| 52 | error_message = "" |
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| 53 | for path in self.list_path: |
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| 54 | basename = os.path.basename(path) |
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| 55 | _, extension = os.path.splitext(basename) |
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| 56 | if self.load_state_flag: |
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| 57 | if extension.lower() in EXTENSIONS: |
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| 58 | pass |
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| 59 | else: |
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| 60 | if extension.lower() not in EXTENSIONS: |
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| 61 | pass |
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| 62 | try: |
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| 63 | temp = self.loader.load(path) |
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| 64 | if temp.__class__.__name__ == "list": |
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| 65 | for item in temp: |
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| 66 | data = self.transform_data(item, path) |
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| 67 | output.append(data) |
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| 68 | else: |
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| 69 | data = self.transform_data(temp, path) |
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| 70 | output.append(data) |
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| 71 | message = "Loading ..." + str(path) + "\n" |
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| 72 | if self.updatefn is not None: |
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| 73 | self.updatefn(output=output, message=message) |
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| 74 | except: |
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| 75 | error_message = "Error while loading: %s\n" % str(path) |
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| 76 | error_message += str(sys.exc_value) + "\n" |
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| 77 | self.updatefn(output=output, message=error_message) |
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| 78 | |
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| 79 | message = "Loading Complete!" |
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| 80 | self.complete(output=output, error_message=error_message, |
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| 81 | message=message, path=self.list_path) |
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