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

  • Committer: Thomas Hervé
  • Date: 2009-07-08 13:52:04 UTC
  • Revision ID: thomas@canonical.com-20090708135204-df5eesrthifpylf8
Remove twisted copy

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src/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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