## Load the contents of the provided file path and generate a set of
# class instances of the specified type; return a list of created instances.
# All extra parameters are passed to the constructor of the class alongside
# the loaded record.
def loadRecords(filePath, classType, *args, **kwargs):
    filehandle = open(filePath, 'r')
    try:
        records = json.load(filehandle)
    except Exception, e:
        print "Data file %s is not valid JSON: %s" % (filePath, e)
        raise e
    filehandle.close()
    result = []
    for i, record in enumerate(records):
        try:
            result.append(classType(record, *args, **kwargs))
        except Exception, e:
            # Figure out roughly where in the file we were when we failed.
            # Tricky, since we loaded the entire file correctly, but one of
            # the records in it was faulty in a JSON-compatible way.
            # For now, assuming that any line that begins with a '{' is a
            # new record.
            filehandle = open(filePath, 'r')
            lineNum = 0
            curIndex = 0
            didFindRecord = False
            for j, line in enumerate(filehandle):
                lineNum += 1
                if line[0] == '{':
                    curIndex += 1
                    if curIndex == i:
                        print "Failed to load record %d starting on line %d from data file %s:" % (i, lineNum, filePath)
                        didFindRecord = True
                        break
            if not didFindRecord:
                print "Failed to load record %d from data file %s:" % (i, filePath)
            traceback.print_exc()
            sys.exit()
    return result