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Viewing changes to twisted/vfs/backends/adhoc.py

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2007-01-17 14:52:35 UTC
  • mfrom: (1.1.5 upstream) (2.1.2 etch)
  • Revision ID: james.westby@ubuntu.com-20070117145235-btmig6qfmqfen0om
Tags: 2.5.0-0ubuntu1
New upstream version, compatible with python2.5.

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twisted/vfs/backends/adhoc.py
 
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"""Ad-hoc backend for VFS."""
 
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from zope.interface import implements
 
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from twisted.vfs import ivfs
 
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class AdhocDirectory:
 
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    """Ad-hoc directory.
 
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    Can contain arbitrary other directories (but not files) as children.
 
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    """
 
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    implements(ivfs.IFileSystemContainer)
 
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    def __init__(self, children=None, name=None, parent=None):
 
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        if not parent : self.parent = self
 
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        else : self.parent = parent
 
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        self.name = name
 
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        if children is None:
 
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            children = {}
 
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        self._children = children
 
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    def children(self):
 
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        return [ ('.', self), ('..', self.parent) ] + [
 
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            ( childName, self.child(childName) )
 
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            for childName in self._children.keys() ]
 
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    def child(self, childName):
 
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        try:
 
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            return self._children[childName]
 
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        except KeyError:
 
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            raise ivfs.NotFoundError(childName)
 
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    def getMetadata(self):
 
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        return {}
 
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    def exists(self, childName):
 
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        return self._children.has_key(childName)
 
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    def putChild(self, name, node):
 
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        node.parent = self
 
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        self._children[name] = node
 
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    def createDirectory(self, childName):
 
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        # Users cannot add directories to an AdhocDirectory, so raise
 
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        # PermissionError.
 
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        raise ivfs.PermissionError()
 
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    def createFile(self, childName, exclusive=True):
 
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        # AdhocDirectories cannot contain files directly, so give permission
 
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        # denied if someone tries to create one.
 
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        raise ivfs.PermissionError()
 
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