SF.net SVN: fclient: [439] trunk/sandbox/fcp2/fcp_lib/pmstruct.py

[<jU...@us...>]

Revision: 439
          http://fclient.svn.sourceforge.net/fclient/?rev=439&view=rev
Author:   jUrner
Date:     2008-06-30 02:36:21 -0700 (Mon, 30 Jun 2008)

Log Message:
-----------
no longer needed

Removed Paths:
-------------
    trunk/sandbox/fcp2/fcp_lib/pmstruct.py

Deleted: trunk/sandbox/fcp2/fcp_lib/pmstruct.py
===================================================================
--- trunk/sandbox/fcp2/fcp_lib/pmstruct.py	2008-06-30 09:35:54 UTC (rev 438)
+++ trunk/sandbox/fcp2/fcp_lib/pmstruct.py	2008-06-30 09:36:21 UTC (rev 439)
@@ -1,131 +0,0 @@
-"""Poor mans structure
-
-
-
-"""
-
-import base64
-#****************************************************************************
-#
-#****************************************************************************
-Str = (base64.b64decode, base64.b64encode, (str, unicode))
-Int = (int, str, int)
-Float = (float, float)
-
-
-
-class PoorMansStruct(object):
-	"""Poor mans structure
-	
-	Converts a maping to a string and vice versa	
-	
-	
-	Subclasses must define a _fields_ attribute wich is a mapping from field name 
-	to conversion 	methods (fieldName, (getter, setter, fieldType)). getter() should convert
-	the fields value to the desired python type, setter should convert the python
-	type to string. Both will be called with one argument: the value to convert
-	and should rasise if the value can not be converted. fieldType is the data type 
-	expected on mappping conversion.
-		
-	For convenience the module defines some standard types like Int, Float
-	and String.
-	
-	>>> class S(PoorMansStruct):
-	...    _fields_ = [
-	...        ('Foo', (int, str, int)),
-	...        ('Bar', Str),
-	...        ]
-	
-	To convert a mapping to a string, call toString() with the mapping to convert
-	>>> p = S.toString({'Foo': 123456, 'Bar': 'abcdefg'})
-	>>> p
-	'123456\\x01YWJjZGVmZw=='
-	
-	To convert a string to a mapping call fromString() with the string to convert
-	>>> d = S.fromString(p)
-	>>> sorted(d.items())
-	[('Bar', 'abcdefg'), ('Foo', 123456)]
-	
-	
-	Field names must corrospond to mapping names
-	>>> p = S.toString({'IAmInvalid': 123456, 'Bar': 'abcdefg'})
-	Traceback (most recent call last):
-	...
-	KeyError: 'Foo'
-	
-	
-	All field names must be present in the mapping passed
-	>>> p = S.toString({'Bar': 'abcdefg'})
-	Traceback (most recent call last):
-	...
-	KeyError: 'Foo'
-	
-	types of the mapping have to corrospond to field types
-	>>> p = S.toString({'Foo': 'invalid-int', 'Bar': 'abcdefg'})
-	Traceback (most recent call last):
-	...
-	ValueError: Invalid type for field "Foo, expected: <type 'int'>"
-	
-	invalid field types are detected on converting the string back to a mapping
-	>>> p = 'invalid-int\\x01YWJjZGVmZw=='
-	>>> S.fromString(p)
-	Traceback (most recent call last):
-	...
-	ValueError: Invalid field #0: (invalid literal for int() with base 10: 'invalid-int')
-		
-	too few fields in the input strig will be recognized
-	>>> p = 'YWJjZGVmZw=='
-	>>> S.fromString(p)
-	Traceback (most recent call last):
-	...
-	ValueError: Too few fields in input string
-	
-	...aswell as too many
-	>>> p = '999\x01123456\x01YWJjZGVmZw=='
-	>>> S.fromString(p)
-	Traceback (most recent call last):
-	...
-	ValueError: Too many fields in input string
-	"""
-		
-	_sep_ = '\x01'
-	_fields_ = []
-	
-	
-	@classmethod
-	def fromString(klass, string):
-		params = string.split(klass._sep_)
-		if len(params) > len(klass._fields_):
-			raise ValueError('Too many fields in input string')
-		if len(params) < len(klass._fields_):
-			raise ValueError('Too few fields in input string')
-		out = {}
-		for n, (fieldName, (getter, setter, fieldType)) in enumerate(klass._fields_):
-			try:
-				out[fieldName] = getter(params[n])
-			except Exception, details:
-				raise ValueError('Invalid field #%s: (%s)' % (n, details))
-		return out
-		
-	@classmethod
-	def toString(klass, mapping):
-		out = []
-		for n, (fieldName, (getter, setter, fieldType)) in enumerate(klass._fields_):
-			value = mapping[fieldName]
-			if not isinstance(value, fieldType):
-				raise ValueError('Invalid type for field "%s, expected: %s"' % (fieldName, fieldType))
-			try:
-				value = setter(value)
-				assert isinstance(value, str)
-				out.append(value)
-			except Exception, details:
-				raise ValueError('Invalid field "%s": (%s)' % (fieldName, details))
-		return klass._sep_.join(out)	
-			
-#****************************************************************************
-#
-#****************************************************************************
-if __name__ == '__main__':
-	import doctest
-	print 'doctests failed: %s/%s' % doctest.testmod()
-


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