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annotate venv/lib/python2.7/site-packages/boto/dynamodb/schema.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # Copyright (c) 2011 Mitch Garnaat http://garnaat.org/
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2 # Copyright (c) 2011 Amazon.com, Inc. or its affiliates. All Rights Reserved
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3 #
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4 # Permission is hereby granted, free of charge, to any person obtaining a
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5 # copy of this software and associated documentation files (the
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6 # "Software"), to deal in the Software without restriction, including
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7 # without limitation the rights to use, copy, modify, merge, publish, dis-
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8 # tribute, sublicense, and/or sell copies of the Software, and to permit
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9 # persons to whom the Software is furnished to do so, subject to the fol-
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10 # lowing conditions:
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11 #
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12 # The above copyright notice and this permission notice shall be included
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13 # in all copies or substantial portions of the Software.
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14 #
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15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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16 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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17 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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18 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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19 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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21 # IN THE SOFTWARE.
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22 #
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23
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24
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25 class Schema(object):
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26 """
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27 Represents a DynamoDB schema.
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28
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29 :ivar hash_key_name: The name of the hash key of the schema.
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30 :ivar hash_key_type: The DynamoDB type specification for the
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31 hash key of the schema.
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32 :ivar range_key_name: The name of the range key of the schema
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33 or None if no range key is defined.
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34 :ivar range_key_type: The DynamoDB type specification for the
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35 range key of the schema or None if no range key is defined.
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36 :ivar dict: The underlying Python dictionary that needs to be
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37 passed to Layer1 methods.
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38 """
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39
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40 def __init__(self, schema_dict):
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41 self._dict = schema_dict
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42
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43 def __repr__(self):
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44 if self.range_key_name:
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45 s = 'Schema(%s:%s)' % (self.hash_key_name, self.range_key_name)
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46 else:
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47 s = 'Schema(%s)' % self.hash_key_name
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48 return s
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49
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50 @classmethod
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51 def create(cls, hash_key, range_key=None):
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52 """Convenience method to create a schema object.
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53
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54 Example usage::
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55
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56 schema = Schema.create(hash_key=('foo', 'N'))
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57 schema2 = Schema.create(hash_key=('foo', 'N'),
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58 range_key=('bar', 'S'))
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59
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60 :type hash_key: tuple
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61 :param hash_key: A tuple of (hash_key_name, hash_key_type)
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62
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63 :type range_key: tuple
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64 :param hash_key: A tuple of (range_key_name, range_key_type)
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65
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66 """
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67 reconstructed = {
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68 'HashKeyElement': {
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69 'AttributeName': hash_key[0],
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70 'AttributeType': hash_key[1],
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71 }
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72 }
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73 if range_key is not None:
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74 reconstructed['RangeKeyElement'] = {
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75 'AttributeName': range_key[0],
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76 'AttributeType': range_key[1],
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77 }
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78 instance = cls(None)
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79 instance._dict = reconstructed
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80 return instance
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81
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82 @property
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83 def dict(self):
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84 return self._dict
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85
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86 @property
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87 def hash_key_name(self):
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88 return self._dict['HashKeyElement']['AttributeName']
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89
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90 @property
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91 def hash_key_type(self):
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92 return self._dict['HashKeyElement']['AttributeType']
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93
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94 @property
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95 def range_key_name(self):
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96 name = None
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97 if 'RangeKeyElement' in self._dict:
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98 name = self._dict['RangeKeyElement']['AttributeName']
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99 return name
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100
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101 @property
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102 def range_key_type(self):
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103 type = None
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104 if 'RangeKeyElement' in self._dict:
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105 type = self._dict['RangeKeyElement']['AttributeType']
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106 return type
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107
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108 def __eq__(self, other):
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109 return (self.hash_key_name == other.hash_key_name and
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110 self.hash_key_type == other.hash_key_type and
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111 self.range_key_name == other.range_key_name and
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112 self.range_key_type == other.range_key_type)