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For files that have a Cloudera copyright (and no other copyright notice), make changes to follow the ASF source file header policy here: http://www.apache.org/legal/src-headers.html#headers Specifically: 1) Remove the Cloudera copyright. 2) Modify NOTICE.txt according to http://www.apache.org/legal/src-headers.html#notice to follow that format and add a line for Cloudera. 3) Replace or add the existing ASF license text with the one given on the website. Much of this change was automatically generated via: git grep -li 'Copyright.*Cloudera' > modified_files.txt cat modified_files.txt | xargs perl -n -i -e 'print unless m#Copyright.*Cloudera#i;' cat modified_files_txt | xargs fix_apache_license.py [1] Some manual fixups were performed following those steps, especially when license text was completely missing from the file. [1] https://gist.github.com/anonymous/ff71292094362fc5c594 with minor modification to ORIG_LICENSE to match Impala's license text. Change-Id: I2e0bd8420945b953e1b806041bea4d72a3943d86 Reviewed-on: http://gerrit.cloudera.org:8080/3779 Reviewed-by: Dan Hecht <dhecht@cloudera.com> Tested-by: Internal Jenkins
105 lines
4.0 KiB
Python
105 lines
4.0 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from datetime import datetime, timedelta
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from decimal import Decimal as PyDecimal
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from random import randint, random, uniform
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from db_types import Boolean, Char, Decimal, Float, Int, Timestamp
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class RandomValGenerator(object):
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def __init__(self,
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min_number=-1000,
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max_number=1000,
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min_date=datetime(1990, 1, 1),
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max_date=datetime(2030, 1, 1),
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null_val_percentage=0.1):
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if type(min_number) != int or type(max_number) != int:
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raise Exception("min_number and max_number must be integers but were %s and %s"
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% (type(min_number), type(max_number)))
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self.min_number = min_number
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self.max_number = max_number
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self.min_date = min_date
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self.max_date = max_date
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self.null_val_percentage = null_val_percentage
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def generate_val(self, val_type):
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'''Generate and return a single random val. Use the val_type parameter to
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specify the type of val to generate. See types.py for valid val_type
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options.
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Ex:
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generator = RandomValGenerator(min_number=1, max_number=5)
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val = generator.generate_val(model.Int)
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assert 1 <= val and val <= 5
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'''
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return next(self.create_val_generator(val_type))
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def create_val_generator(self, val_type):
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'''Generate and return a single random val. Use the val_type parameter to
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specify the type of val to generate. See types.py for valid val_type
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options.
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Ex:
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generator = RandomValGenerator(min_number=1, max_number=5)
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val = generator.generate_val(model.Int)
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assert 1 <= val and val <= 5
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'''
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if issubclass(val_type, Int):
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def val():
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return randint(
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max(self.min_number, val_type.MIN), min(val_type.MAX, self.max_number))
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elif issubclass(val_type, Char):
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def val():
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val = randint(
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max(self.min_number, val_type.MIN), min(val_type.MAX, self.max_number))
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return None if val is None else str(val)[:val_type.MAX]
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elif issubclass(val_type, Decimal):
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# Create an int within the maximum length of the Decimal, then shift the decimal
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# point as needed.
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max_digits = val_type.MAX_DIGITS
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fractal_digits = val_type.MAX_FRACTIONAL_DIGITS
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max_type_val = 10 ** max_digits
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decimal_point_shift = 10 ** fractal_digits
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max_val = min(self.max_number * decimal_point_shift, max_type_val - 1)
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min_val = max(self.min_number * decimal_point_shift, -1 * max_type_val + 1)
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def val():
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val = PyDecimal(randint(min_val, max_val))
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return val.scaleb(-1 * val_type.MAX_FRACTIONAL_DIGITS)
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elif issubclass(val_type, Float):
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def val():
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return uniform(self.min_number, self.max_number)
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elif issubclass(val_type, Timestamp):
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delta = self.max_date - self.min_date
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delta_in_seconds = delta.days * 24 * 60 * 60 + delta.seconds
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def val():
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offset_in_seconds = randint(0, delta_in_seconds)
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val = self.min_date + timedelta(0, offset_in_seconds)
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return datetime(val.year, val.month, val.day)
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elif issubclass(val_type, Boolean):
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def val():
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return randint(0, 1) == 1
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else:
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raise Exception('Unsupported type %s' % val_type.__name__)
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while True:
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if random() < self.null_val_percentage:
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yield None
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else:
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yield val()
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