/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/save.py
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revision 1430 by jonathan, Wed Jul 16 13:23:28 2003 UTC revision 2384 by jan, Thu Oct 7 14:24:24 2004 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH  # Copyright (c) 2001-2004 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]> (2004)
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]> (2001-2004)
5  # Jonathan Coles <[email protected]>  # Jonathan Coles <[email protected]> (2003)
6    # Frank Koormann <[email protected]> (2003)
7  #  #
8  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
9  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 12  Functions to save a session to a file Line 13  Functions to save a session to a file
13  """  """
14    
15  __version__ = "$Revision$"  __version__ = "$Revision$"
16    # $Source$
17    # $Id$
18    
19  import os  import os
20    
# Line 23  from Thuban.Model.classification import Line 26  from Thuban.Model.classification import
26      ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap      ClassGroupDefault, ClassGroupSingleton, ClassGroupRange, ClassGroupMap
27  from Thuban.Model.transientdb import AutoTransientTable, TransientJoinedTable  from Thuban.Model.transientdb import AutoTransientTable, TransientJoinedTable
28  from Thuban.Model.table import DBFTable, FIELDTYPE_STRING  from Thuban.Model.table import DBFTable, FIELDTYPE_STRING
29  from Thuban.Model.data import DerivedShapeStore, ShapefileStore  from Thuban.Model.data import DerivedShapeStore, ShapefileStore, \
30                                  SHAPETYPE_POINT
31    
32  from Thuban.Model.xmlwriter import XMLWriter  from Thuban.Model.xmlwriter import XMLWriter
33    from postgisdb import PostGISConnection, PostGISShapeStore
34    
35  def relative_filename(dir, filename):  def relative_filename(dir, filename):
36      """Return a filename relative to dir for the absolute file name absname.      """Return a filename relative to dir for the absolute file name absname.
# Line 40  def relative_filename(dir, filename): Line 45  def relative_filename(dir, filename):
45          return filename          return filename
46    
47    
48    def unify_filename(filename):
49        """Return a 'unified' version of filename
50    
51        The .thuban files should be as platform independent as possible.
52        Since they must contain filenames the filenames have to unified. We
53        unify on unix-like filenames for now, which means we do nothing on a
54        posix system and simply replace backslashes with slashes on windows
55        """
56        if os.name == "posix":
57            return filename
58        elif os.name == "nt":
59            return "/".join(filename.split("\\"))
60        else:
61            raise RuntimeError("Unsupported platform for unify_filename: %s"
62                               % os.name)
63    
64  def sort_data_stores(stores):  def sort_data_stores(stores):
65      """Return a topologically sorted version of the sequence of data containers      """Return a topologically sorted version of the sequence of data containers
66    
# Line 102  class SessionSaver(XMLWriter): Line 123  class SessionSaver(XMLWriter):
123      def has_id(self, obj):      def has_id(self, obj):
124          return self.idmap.has_key(id(obj))          return self.idmap.has_key(id(obj))
125    
126        def prepare_filename(self, filename):
127            """Return the string to use when writing filename to the thuban file
128    
129            The returned string is a unified version (only slashes as
130            directory separators, see unify_filename) of filename expressed
131            relative to the directory the .thuban file is written to.
132            """
133            return unify_filename(relative_filename(self.dir, filename))
134    
135      def write(self, file_or_filename):      def write(self, file_or_filename):
136          XMLWriter.write(self, file_or_filename)          XMLWriter.write(self, file_or_filename)
137    
138          self.write_header("session", "thuban-0.9.dtd")          self.write_header("session", "thuban-1.1.dtd")
139          self.write_session(self.session)          self.write_session(self.session)
140          self.close()          self.close()
141    
# Line 132  class SessionSaver(XMLWriter): Line 162  class SessionSaver(XMLWriter):
162              attrs["xmlns:" + name] = uri              attrs["xmlns:" + name] = uri
163          # default name space          # default name space
164          attrs["xmlns"] = \          attrs["xmlns"] = \
165                 "http://thuban.intevation.org/dtds/thuban-0.9-dev.dtd"                 "http://thuban.intevation.org/dtds/thuban-1.1-dev.dtd"
166          self.open_element("session", attrs)          self.open_element("session", attrs)
167            self.write_db_connections(session)
168          self.write_data_containers(session)          self.write_data_containers(session)
169          for map in session.Maps():          for map in session.Maps():
170              self.write_map(map)              self.write_map(map)
171          self.close_element("session")          self.close_element("session")
172    
173        def write_db_connections(self, session):
174            for conn in session.DBConnections():
175                if isinstance(conn, PostGISConnection):
176                    self.write_element("dbconnection",
177                                       {"id": self.define_id(conn),
178                                        "dbtype": "postgis",
179                                        "host": conn.host,
180                                        "port": conn.port,
181                                        "user": conn.user,
182                                        "dbname": conn.dbname})
183                else:
184                    raise ValueError("Can't handle db connection %r" % conn)
185    
186      def write_data_containers(self, session):      def write_data_containers(self, session):
187          containers = sort_data_stores(session.DataContainers())          containers = sort_data_stores(session.DataContainers())
188          for container in containers:          for container in containers:
# Line 156  class SessionSaver(XMLWriter): Line 200  class SessionSaver(XMLWriter):
200              idvalue = self.define_id(container)              idvalue = self.define_id(container)
201              if isinstance(container, ShapefileStore):              if isinstance(container, ShapefileStore):
202                  self.define_id(container.Table(), idvalue)                  self.define_id(container.Table(), idvalue)
203                  filename = relative_filename(self.dir, container.FileName())                  filename = self.prepare_filename(container.FileName())
204                  self.write_element("fileshapesource",                  self.write_element("fileshapesource",
205                                     {"id": idvalue, "filename": filename,                                     {"id": idvalue, "filename": filename,
206                                      "filetype": "shapefile"})                                      "filetype": "shapefile"})
# Line 166  class SessionSaver(XMLWriter): Line 210  class SessionSaver(XMLWriter):
210                                     {"id": idvalue,                                     {"id": idvalue,
211                                      "shapesource": self.get_id(shapesource),                                      "shapesource": self.get_id(shapesource),
212                                      "table": self.get_id(table)})                                      "table": self.get_id(table)})
213                elif isinstance(container, PostGISShapeStore):
214                    conn = container.DBConnection()
215                    self.write_element("dbshapesource",
216                                       {"id": idvalue,
217                                        "dbconn": self.get_id(conn),
218                                        "tablename": container.TableName(),
219                                        "id_column": container.IDColumn().name,
220                                        "geometry_column":
221                                          container.GeometryColumn().name,
222                                        })
223              elif isinstance(container, DBFTable):              elif isinstance(container, DBFTable):
224                  filename = relative_filename(self.dir, container.FileName())                  filename = self.prepare_filename(container.FileName())
225                  self.write_element("filetable",                  self.write_element("filetable",
226                                     {"id": idvalue,                                     {"id": idvalue,
227                                      "title": container.Title(),                                      "title": container.Title(),
# Line 208  class SessionSaver(XMLWriter): Line 262  class SessionSaver(XMLWriter):
262          """Write the projection.          """Write the projection.
263          """          """
264          if projection and len(projection.params) > 0:          if projection and len(projection.params) > 0:
265              self.open_element("projection", {"name": projection.GetName()})              attrs = {"name": projection.GetName()}
266                epsg = projection.EPSGCode()
267                if epsg is not None:
268                    attrs["epsg"] = epsg
269                self.open_element("projection", attrs)
270              for param in projection.params:              for param in projection.params:
271                  self.write_element('parameter value="%s"' %                  self.write_element('parameter value="%s"' %
272                                     self.encode(param))                                     self.encode(param))
# Line 241  class SessionSaver(XMLWriter): Line 299  class SessionSaver(XMLWriter):
299              self.write_classification(layer)              self.write_classification(layer)
300              self.close_element("layer")              self.close_element("layer")
301          elif isinstance(layer, RasterLayer):          elif isinstance(layer, RasterLayer):
302              attrs["filename"] = relative_filename(self.dir, layer.filename)              attrs["filename"] = self.prepare_filename(layer.filename)
303              self.open_element("rasterlayer", attrs)              self.open_element("rasterlayer", attrs)
304              self.write_projection(layer.GetProjection())              self.write_projection(layer.GetProjection())
305              self.close_element("rasterlayer")              self.close_element("rasterlayer")
# Line 254  class SessionSaver(XMLWriter): Line 312  class SessionSaver(XMLWriter):
312    
313          lc = layer.GetClassification()          lc = layer.GetClassification()
314    
315          field = layer.GetClassificationField()          field = layer.GetClassificationColumn()
316    
317          #          #
318          # there isn't a classification of anything so do nothing          # there isn't a classification of anything so do nothing
319          #          #
# Line 290  class SessionSaver(XMLWriter): Line 348  class SessionSaver(XMLWriter):
348                      'stroke_width': str(data.GetLineWidth()),                      'stroke_width': str(data.GetLineWidth()),
349                      'fill'        : data.GetFill().hex()}                      'fill'        : data.GetFill().hex()}
350    
351                # only for point layers write the size attribute
352                if layer.ShapeType() == SHAPETYPE_POINT:
353                    dict['size'] =  str(data.GetSize())
354    
355              self.open_element(open_el)              self.open_element(open_el)
356              self.write_element("cldata", dict)              self.write_element("cldata", dict)
357              self.close_element(close_el)              self.close_element(close_el)
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