diff options
Diffstat (limited to 'pyasn1/type/base.py')
| -rw-r--r-- | pyasn1/type/base.py | 64 |
1 files changed, 54 insertions, 10 deletions
diff --git a/pyasn1/type/base.py b/pyasn1/type/base.py index e1f34f5..21e4041 100644 --- a/pyasn1/type/base.py +++ b/pyasn1/type/base.py @@ -12,8 +12,8 @@ from pyasn1.type import constraint from pyasn1.type import tag from pyasn1.type import tagmap -__all__ = ['Asn1Item', 'Asn1ItemBase', 'AbstractSimpleAsn1Item', - 'AbstractConstructedAsn1Item'] +__all__ = ['Asn1Item', 'Asn1Type', 'SimpleAsn1Type', + 'ConstructedAsn1Type'] class Asn1Item(object): @@ -26,7 +26,17 @@ class Asn1Item(object): return Asn1Item._typeCounter -class Asn1ItemBase(Asn1Item): +class Asn1Type(Asn1Item): + """Base class for all classes representing ASN.1 types. + + In the user code, |ASN.1| class is normally used only for telling + ASN.1 objects from others. + + Note + ---- + For as long as ASN.1 is concerned, a way to compare ASN.1 types + is to use :meth:`isSameTypeWith` and :meth:`isSuperTypeOf` methods. + """ #: Set or return a :py:class:`~pyasn1.type.tag.TagSet` object representing #: ASN.1 tag(s) associated with |ASN.1| type. tagSet = tag.TagSet() @@ -147,9 +157,13 @@ class Asn1ItemBase(Asn1Item): def getSubtypeSpec(self): return self.subtypeSpec + # backward compatibility def hasValue(self): return self.isValue +# Backward compatibility +Asn1ItemBase = Asn1Type + class NoValue(object): """Create a singleton instance of NoValue class. @@ -228,13 +242,25 @@ class NoValue(object): noValue = NoValue() -# Base class for "simple" ASN.1 objects. These are immutable. -class AbstractSimpleAsn1Item(Asn1ItemBase): +class SimpleAsn1Type(Asn1Type): + """Base class for all simple classes representing ASN.1 types. + + ASN.1 distinguishes types by their ability to hold other objects. + Scalar types are known as *simple* in ASN.1. + + In the user code, |ASN.1| class is normally used only for telling + ASN.1 objects from others. + + Note + ---- + For as long as ASN.1 is concerned, a way to compare ASN.1 types + is to use :meth:`isSameTypeWith` and :meth:`isSuperTypeOf` methods. + """ #: Default payload value defaultValue = noValue def __init__(self, value=noValue, **kwargs): - Asn1ItemBase.__init__(self, **kwargs) + Asn1Type.__init__(self, **kwargs) if value is noValue: value = self.defaultValue else: @@ -426,10 +452,12 @@ class AbstractSimpleAsn1Item(Asn1ItemBase): def prettyPrint(self, scope=0): return self.prettyOut(self._value) - # noinspection PyUnusedLocal def prettyPrintType(self, scope=0): return '%s -> %s' % (self.tagSet, self.__class__.__name__) +# Backward compatibility +AbstractSimpleAsn1Item = SimpleAsn1Type + # # Constructed types: # * There are five of them: Sequence, SequenceOf/SetOf, Set and Choice @@ -450,9 +478,22 @@ class AbstractSimpleAsn1Item(Asn1ItemBase): # -class AbstractConstructedAsn1Item(Asn1ItemBase): +class ConstructedAsn1Type(Asn1Type): + """Base class for all constructed classes representing ASN.1 types. + + ASN.1 distinguishes types by their ability to hold other objects. + Those "nesting" types are known as *constructed* in ASN.1. + + In the user code, |ASN.1| class is normally used only for telling + ASN.1 objects from others. - #: If `True`, requires exact component type matching, + Note + ---- + For as long as ASN.1 is concerned, a way to compare ASN.1 types + is to use :meth:`isSameTypeWith` and :meth:`isSuperTypeOf` methods. + """ + + #: If :obj:`True`, requires exact component type matching, #: otherwise subtype relation is only enforced strictConstraints = False @@ -466,7 +507,7 @@ class AbstractConstructedAsn1Item(Asn1ItemBase): } readOnly.update(kwargs) - Asn1ItemBase.__init__(self, **readOnly) + Asn1Type.__init__(self, **readOnly) def __repr__(self): representation = '%s %s object' % ( @@ -637,3 +678,6 @@ class AbstractConstructedAsn1Item(Asn1ItemBase): def getComponentType(self): return self.componentType + +# Backward compatibility +AbstractConstructedAsn1Item = ConstructedAsn1Type |