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139 lines
5.4 KiB
139 lines
5.4 KiB
#
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# genxmlif, Release 0.9.0
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# file: xmlif4Dom.py
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#
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# XML interface class to the 4DOM library
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#
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# history:
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# 2005-04-25 rl created
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# 2008-07-01 rl Limited support of XInclude added
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#
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# Copyright (c) 2005-2008 by Roland Leuthe. All rights reserved.
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#
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# --------------------------------------------------------------------
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# The generix XML interface is
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#
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# Copyright (c) 2005-2008 by Roland Leuthe
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#
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# By obtaining, using, and/or copying this software and/or its
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# associated documentation, you agree that you have read, understood,
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# and will comply with the following terms and conditions:
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#
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# Permission to use, copy, modify, and distribute this software and
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# its associated documentation for any purpose and without fee is
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# hereby granted, provided that the above copyright notice appears in
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# all copies, and that both that copyright notice and this permission
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# notice appear in supporting documentation, and that the name of
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# the author not be used in advertising or publicity
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# pertaining to distribution of the software without specific, written
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# prior permission.
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#
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# THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
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# TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
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# ABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
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# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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# OF THIS SOFTWARE.
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# --------------------------------------------------------------------
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import urllib
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from xml.dom.ext.reader.Sax2 import Reader, XmlDomGenerator
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from xml.sax._exceptions import SAXParseException
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from ..genxmlif import XMLIF_4DOM, GenXmlIfError
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from xmlifUtils import convertToAbsUrl
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from xmlifDom import XmlInterfaceDom, XmlIfBuilderExtensionDom, InternalDomTreeWrapper, InternalDomElementWrapper
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class XmlInterface4Dom (XmlInterfaceDom):
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#####################################################
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# for description of the interface methods see xmlifbase.py
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#####################################################
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def __init__ (self, verbose, useCaching, processXInclude):
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XmlInterfaceDom.__init__ (self, verbose, useCaching, processXInclude)
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self.xmlIfType = XMLIF_4DOM
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if self.verbose:
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print "Using 4Dom interface module..."
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def parse (self, file, baseUrl="", internalOwnerDoc=None):
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absUrl = convertToAbsUrl (file, baseUrl)
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fp = urllib.urlopen (absUrl)
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return self._parseStream (fp, file, absUrl, internalOwnerDoc)
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def parseString (self, text, baseUrl="", internalOwnerDoc=None):
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import cStringIO
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fp = cStringIO.StringIO(text)
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absUrl = convertToAbsUrl ("", baseUrl)
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return self._parseStream (fp, "", absUrl, internalOwnerDoc)
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def _parseStream (self, fp, file, absUrl, internalOwnerDoc):
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reader = Reader(validate=0, keepAllWs=0, catName=None,
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saxHandlerClass=ExtXmlDomGenerator, parser=None)
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reader.handler.extinit(file, absUrl, reader.parser, self)
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if internalOwnerDoc != None:
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ownerDoc = internalOwnerDoc.document
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else:
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ownerDoc = None
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try:
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tree = reader.fromStream(fp, ownerDoc)
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fp.close()
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except SAXParseException, errInst:
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fp.close()
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raise GenXmlIfError, "%s: SAXParseException: %s" %(file, str(errInst))
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treeWrapper = reader.handler.treeWrapper
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# XInclude support
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if self.processXInclude:
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if internalOwnerDoc == None:
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internalOwnerDoc = treeWrapper.getTree()
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self.xInclude (treeWrapper.getRootNode(), absUrl, internalOwnerDoc)
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return treeWrapper
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###################################################
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# Extended DOM generator class derived from XmlDomGenerator
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# extended to store related line numbers, file/URL names and
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# defined namespaces in the node object
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class ExtXmlDomGenerator(XmlDomGenerator, XmlIfBuilderExtensionDom):
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def __init__(self, keepAllWs=0):
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XmlDomGenerator.__init__(self, keepAllWs)
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self.treeWrapper = None
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def extinit (self, filePath, absUrl, parser, xmlIf):
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self.filePath = filePath
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self.absUrl = absUrl
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self.parser = parser
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self.xmlIf = xmlIf
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def startElement(self, name, attribs):
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XmlDomGenerator.startElement(self, name, attribs)
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if not self.treeWrapper:
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self.treeWrapper = self.xmlIf.treeWrapperClass(self, InternalDomTreeWrapper(self._rootNode), self.xmlIf.useCaching)
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XmlIfBuilderExtensionDom.__init__(self, self.filePath, self.absUrl, self.treeWrapper, self.xmlIf.elementWrapperClass)
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curNode = self._nodeStack[-1]
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internal4DomElementWrapper = InternalDomElementWrapper(curNode, self.treeWrapper.getTree())
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curNs = self._namespaces.items()
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try:
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curNs.remove( (None,None) )
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except:
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pass
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XmlIfBuilderExtensionDom.startElementHandler (self, internal4DomElementWrapper, self.parser.getLineNumber(), curNs)
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def endElement(self, name):
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curNode = self._nodeStack[-1]
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XmlIfBuilderExtensionDom.endElementHandler (self, curNode.xmlIfExtInternalWrapper, self.parser.getLineNumber())
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XmlDomGenerator.endElement(self, name)
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