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author | Fred Drake <fdrake@acm.org> | 2005-12-14 06:20:35 +0000 |
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committer | Fred Drake <fdrake@acm.org> | 2005-12-14 06:20:35 +0000 |
commit | c6730e1772f52b99feaffb95cdb7774905340d52 (patch) | |
tree | 0f125cf464348edd71c41f35c4ecbff8f8fe6114 /Lib/xml/dom/domreg.py | |
parent | cc117dbb9d925ade41ae3e43ff2292b83b5d9b32 (diff) | |
download | cpython-git-c6730e1772f52b99feaffb95cdb7774905340d52.tar.gz |
move the xml package implementation to xmlcore, and adjust the tests to
test that package, not the xmlcore/PyXML switcheroo fiasco in the xml
module/package
Diffstat (limited to 'Lib/xml/dom/domreg.py')
-rw-r--r-- | Lib/xml/dom/domreg.py | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/Lib/xml/dom/domreg.py b/Lib/xml/dom/domreg.py deleted file mode 100644 index 684c436016..0000000000 --- a/Lib/xml/dom/domreg.py +++ /dev/null @@ -1,99 +0,0 @@ -"""Registration facilities for DOM. This module should not be used -directly. Instead, the functions getDOMImplementation and -registerDOMImplementation should be imported from xml.dom.""" - -from xml.dom.minicompat import * # isinstance, StringTypes - -# This is a list of well-known implementations. Well-known names -# should be published by posting to xml-sig@python.org, and are -# subsequently recorded in this file. - -well_known_implementations = { - 'minidom':'xml.dom.minidom', - '4DOM': 'xml.dom.DOMImplementation', - } - -# DOM implementations not officially registered should register -# themselves with their - -registered = {} - -def registerDOMImplementation(name, factory): - """registerDOMImplementation(name, factory) - - Register the factory function with the name. The factory function - should return an object which implements the DOMImplementation - interface. The factory function can either return the same object, - or a new one (e.g. if that implementation supports some - customization).""" - - registered[name] = factory - -def _good_enough(dom, features): - "_good_enough(dom, features) -> Return 1 if the dom offers the features" - for f,v in features: - if not dom.hasFeature(f,v): - return 0 - return 1 - -def getDOMImplementation(name = None, features = ()): - """getDOMImplementation(name = None, features = ()) -> DOM implementation. - - Return a suitable DOM implementation. The name is either - well-known, the module name of a DOM implementation, or None. If - it is not None, imports the corresponding module and returns - DOMImplementation object if the import succeeds. - - If name is not given, consider the available implementations to - find one with the required feature set. If no implementation can - be found, raise an ImportError. The features list must be a sequence - of (feature, version) pairs which are passed to hasFeature.""" - - import os - creator = None - mod = well_known_implementations.get(name) - if mod: - mod = __import__(mod, {}, {}, ['getDOMImplementation']) - return mod.getDOMImplementation() - elif name: - return registered[name]() - elif os.environ.has_key("PYTHON_DOM"): - return getDOMImplementation(name = os.environ["PYTHON_DOM"]) - - # User did not specify a name, try implementations in arbitrary - # order, returning the one that has the required features - if isinstance(features, StringTypes): - features = _parse_feature_string(features) - for creator in registered.values(): - dom = creator() - if _good_enough(dom, features): - return dom - - for creator in well_known_implementations.keys(): - try: - dom = getDOMImplementation(name = creator) - except StandardError: # typically ImportError, or AttributeError - continue - if _good_enough(dom, features): - return dom - - raise ImportError,"no suitable DOM implementation found" - -def _parse_feature_string(s): - features = [] - parts = s.split() - i = 0 - length = len(parts) - while i < length: - feature = parts[i] - if feature[0] in "0123456789": - raise ValueError, "bad feature name: %r" % (feature,) - i = i + 1 - version = None - if i < length: - v = parts[i] - if v[0] in "0123456789": - i = i + 1 - version = v - features.append((feature, version)) - return tuple(features) |