/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/load.py
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revision 1844 by bh, Tue Oct 21 10:49:44 2003 UTC revision 2375 by jan, Sun Oct 3 21:05:30 2004 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001, 2002, 2003 by Intevation GmbH  # Copyright (C) 2001, 2002, 2003, 2004 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
# Line 143  class SessionLoader(XMLReader): Line 143  class SessionLoader(XMLReader):
143          for xmlns in ("http://thuban.intevation.org/dtds/thuban-0.8.dtd",          for xmlns in ("http://thuban.intevation.org/dtds/thuban-0.8.dtd",
144                        "http://thuban.intevation.org/dtds/thuban-0.9-dev.dtd",                        "http://thuban.intevation.org/dtds/thuban-0.9-dev.dtd",
145                        "http://thuban.intevation.org/dtds/thuban-0.9.dtd",                        "http://thuban.intevation.org/dtds/thuban-0.9.dtd",
146                        "http://thuban.intevation.org/dtds/thuban-1.0-dev.dtd"):                        "http://thuban.intevation.org/dtds/thuban-1.0-dev.dtd",
147                          "http://thuban.intevation.org/dtds/thuban-1.0rc1.dtd",
148                          "http://thuban.intevation.org/dtds/thuban-1.0.0.dtd",
149                          "http://thuban.intevation.org/dtds/thuban-1.1-dev.dtd"):
150              for key, value in dispatchers.items():              for key, value in dispatchers.items():
151                  dispatchers[(xmlns, key)] = value                  dispatchers[(xmlns, key)] = value
152    
153          XMLReader.AddDispatchers(self, dispatchers)          XMLReader.AddDispatchers(self, dispatchers)
154    
155        def Destroy(self):
156            """Clear all instance variables to cut cyclic references.
157    
158            The GC would have collected the loader eventually but it can
159            happen that it doesn't run at all until Thuban is closed (2.3
160            but not 2.2 tries a bit harder and forces a collection when the
161            interpreter terminates)
162            """
163            self.__dict__.clear()
164    
165      def start_session(self, name, qname, attrs):      def start_session(self, name, qname, attrs):
166          self.theSession = Session(self.encode(attrs.get((None, 'title'),          self.theSession = Session(self.encode(attrs.get((None, 'title'),
167                                                          None)))                                                          None)))
# Line 176  class SessionLoader(XMLReader): Line 189  class SessionLoader(XMLReader):
189          If the attribute has a default value and it is not present in          If the attribute has a default value and it is not present in
190          attrs, use that default value as the value in the returned dict.          attrs, use that default value as the value in the returned dict.
191    
192          If a conversion is specified, convert the value before putting          The value is converted before putting it into the returned dict.
193          it into the returned dict. The following conversions are          The following conversions are available:
         available:  
194    
195             'filename' -- The attribute is a filename.             'filename' -- The attribute is a filename.
196    
# Line 202  class SessionLoader(XMLReader): Line 214  class SessionLoader(XMLReader):
214                        ascii encoding.                        ascii encoding.
215    
216             a callable -- The attribute value is passed to the callable             a callable -- The attribute value is passed to the callable
217                           and the return value is used a as the converted                           and the return value is used as the converted
218                           value                           value
219    
220            If no conversion is specified for an attribute it is converted
221            with self.encode.
222          """          """
223          normalized = {}          normalized = {}
224    
# Line 237  class SessionLoader(XMLReader): Line 252  class SessionLoader(XMLReader):
252              elif d.conversion:              elif d.conversion:
253                  # Assume it's a callable                  # Assume it's a callable
254                  value = d.conversion(value)                  value = d.conversion(value)
255                else:
256                   value = self.encode(value)
257    
258              normalized[d.name] = value              normalized[d.name] = value
259          return normalized          return normalized
# Line 284  class SessionLoader(XMLReader): Line 301  class SessionLoader(XMLReader):
301                                    AttrDesc("dbconn", True,                                    AttrDesc("dbconn", True,
302                                             conversion = "idref"),                                             conversion = "idref"),
303                                    AttrDesc("tablename", True,                                    AttrDesc("tablename", True,
304                                               conversion = "ascii"),
305                                      # id_column and geometry_column were
306                                      # newly introduced with thuban-1.1.dtd
307                                      # where they're required.  Since we
308                                      # support the older formats too we
309                                      # have them optional here.
310                                      AttrDesc("id_column", False, "gid",
311                                               conversion = "ascii"),
312                                      AttrDesc("geometry_column", False,
313                                             conversion = "ascii")])                                             conversion = "ascii")])
314          ID = attrs["id"]          # The default value of geometry_column to use when instantiating
315          db = attrs["dbconn"]          # the db shapestore is None which we currently can't easily use
316          tablename = attrs["tablename"]          # in check_attrs
317          self.idmap[ID] = self.theSession.OpenDBShapeStore(db, tablename)          geometry_column = attrs["geometry_column"]
318            if not geometry_column:
319                geometry_column = None
320            dbopen = self.theSession.OpenDBShapeStore
321            self.idmap[attrs["id"]] = dbopen(attrs["dbconn"], attrs["tablename"],
322                                             id_column = attrs["id_column"],
323                                             geometry_column=geometry_column)
324    
325      def start_fileshapesource(self, name, qname, attrs):      def start_fileshapesource(self, name, qname, attrs):
326          attrs = self.check_attrs(name, attrs,          attrs = self.check_attrs(name, attrs,
# Line 436  class SessionLoader(XMLReader): Line 468  class SessionLoader(XMLReader):
468          self.aLayer = None          self.aLayer = None
469    
470      def start_classification(self, name, qname, attrs):      def start_classification(self, name, qname, attrs):
471          field = attrs.get((None, 'field'), None)          attrs = self.check_attrs(name, attrs,
472                                     [AttrDesc("field", True),
473                                      AttrDesc("field_type", True)])
474            field = attrs["field"]
475            fieldType = attrs["field_type"]
476    
         fieldType = attrs.get((None, 'field_type'), None)  
477          dbFieldType = self.aLayer.GetFieldType(field)          dbFieldType = self.aLayer.GetFieldType(field)
478    
479          if fieldType != dbFieldType:          if fieldType != dbFieldType:
# Line 519  class SessionLoader(XMLReader): Line 554  class SessionLoader(XMLReader):
554              parse_color(attrs.get((None, 'stroke'), "None")))              parse_color(attrs.get((None, 'stroke'), "None")))
555          self.cl_prop.SetLineWidth(          self.cl_prop.SetLineWidth(
556              int(attrs.get((None, 'stroke_width'), "0")))              int(attrs.get((None, 'stroke_width'), "0")))
557            self.cl_prop.SetSize(int(attrs.get((None, 'size'), "5")))
558          self.cl_prop.SetFill(parse_color(attrs.get((None, 'fill'), "None")))          self.cl_prop.SetFill(parse_color(attrs.get((None, 'fill'), "None")))
559    
560      def end_cldata(self, name, qname):      def end_cldata(self, name, qname):
# Line 528  class SessionLoader(XMLReader): Line 564  class SessionLoader(XMLReader):
564          self.aLayer = self.aMap.LabelLayer()          self.aLayer = self.aMap.LabelLayer()
565    
566      def start_label(self, name, qname, attrs):      def start_label(self, name, qname, attrs):
567          x = float(attrs[(None, 'x')])          attrs = self.check_attrs(name, attrs,
568          y = float(attrs[(None, 'y')])                                   [AttrDesc("x", True, conversion = float),
569          text = self.encode(attrs[(None, 'text')])                                    AttrDesc("y", True, conversion = float),
570          halign = attrs[(None, 'halign')]                                    AttrDesc("text", True),
571          valign = attrs[(None, 'valign')]                                    AttrDesc("halign", True,
572                                               conversion = "ascii"),
573                                      AttrDesc("valign", True,
574                                               conversion = "ascii")])
575            x = attrs['x']
576            y = attrs['y']
577            text = attrs['text']
578            halign = attrs['halign']
579            valign = attrs['valign']
580            if halign not in ("left", "center", "right"):
581                raise LoadError("Unsupported halign value %r" % halign)
582            if valign not in ("top", "center", "bottom"):
583                raise LoadError("Unsupported valign value %r" % valign)
584          self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)          self.aLayer.AddLabel(x, y, text, halign = halign, valign = valign)
585    
586      def characters(self, chars):      def characters(self, chars):
# Line 559  def load_session(filename, db_connection Line 607  def load_session(filename, db_connection
607      # Newly loaded session aren't modified      # Newly loaded session aren't modified
608      session.UnsetModified()      session.UnsetModified()
609    
610        handler.Destroy()
611    
612      return session      return session
613    
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