Source Code for Module RDFClosure.serializers.XMLWriter

 1  """ 
 2   
 3  XML Writer to be used by the L{PrettyXMLSerializer} module. This is a slightly modified version of RDFLib's  
 4  original XML Writer module, the changes are essentially aesthetic in nature (removing the unnecessary CDATA sections,  
 5  using double quotes everywhere for attributes (both for namespaces and attributes in general). 
 6   
 7  """ 
 8   
 9  import codecs 
10  from xml.sax.saxutils import quoteattr, escape 
11   
12 -class XMLWriter(object): 
13 -        def __init__(self, stream, namespace_manager, encoding=None, decl=1): 
14                  encoding = encoding or 'utf-8' 
15                  encoder, decoder, stream_reader, stream_writer = codecs.lookup(encoding) 
16                  self.stream = stream = stream_writer(stream) 
17                  if decl: 
18                          stream.write('<?xml version="1.0" encoding="%s"?>' % encoding) 
19                  self.element_stack = [] 
20                  self.nm = namespace_manager 
21                  self.closed = True 
22   
23 -        def __get_indent(self): 
24                  return "  " * len(self.element_stack) 
25          indent = property(__get_indent) 
26   
27 -        def __close_start_tag(self): 
28                  if not self.closed: # TODO: 
29                          self.closed = True 
30                          self.stream.write(">") 
31   
32 -        def push(self, uri): 
33                  nm = self.nm 
34                  self.__close_start_tag() 
35                  write = self.stream.write 
36                  write("\n") 
37                  write(self.indent) 
38                  write("<%s" % nm.qname(uri)) 
39                  self.element_stack.append(uri) 
40                  self.closed = False 
41                  self.parent = False 
42   
43 -        def pop(self, uri=None): 
44                  top = self.element_stack.pop() 
45                  if uri: 
46                          assert uri==top 
47                  write = self.stream.write 
48                  if not self.closed: 
49                          self.closed = True 
50                          write("/>") 
51                  else: 
52                          if self.parent: 
53                                  write("\n") 
54                                  write(self.indent) 
55                          write("</%s>" % self.nm.qname(uri)) 
56                  self.parent = True 
57   
58 -        def namespaces(self, namespaces): 
59                  write = self.stream.write 
60                  write("\n") 
61                  for prefix, namespace in namespaces: 
62                          if prefix: 
63                                  write('  xmlns:%s="%s"\n' % (prefix, namespace)) 
64                          else: 
65                                  write('  xmlns="%s"\n' % namespace) 
66   
67 -        def attribute(self, uri, value): 
68                  write = self.stream.write 
69                  write(" %s=%s" % (self.nm.qname(uri), quoteattr(value))) 
70   
71 -        def text(self, text, to_escape): 
72                  self.__close_start_tag() 
73                  if to_escape : 
74                          self.stream.write(escape(text)) 
75                  else : 
76                          self.stream.write(text) 
77  #               if "<" in text and ">" in text and not "]]>" in text: 
78  #                       #self.stream.write("<![CDATA[") 
79  #                       self.stream.write(text) 
80  #                       #self.stream.write("]]>") 
81  #               else: 
82  #                       self.stream.write(escape(text)) 
83