fix migration errors

python/plugins/sextante/core/SextanteVectorWriter.py

@@ -0,0 +1,49 @@
+from PyQt4.QtCore import *
+
+from qgis.core import *
+
+class SextanteVectorWriter:
+
+    MEMORY_LAYER_PREFIX = "memory:"
+
+    TYPE_MAP = {QGis.WKBPoint : "Point",
+                QGis.WKBLineString : "LineString",
+                QGis.WKBPolygon : "Polygon",
+                QGis.WKBMultiPoint : "MultiPoint",
+                QGis.WKBMultiLineString : "MultiLineString",
+                QGis.WKBMultiPolygon : "MultiPolygon"
+               }
+
+    def __init__(self, fileName, encoding, fields, geometryType, crs, options=None):
+        self.fileName = fileName
+        self.isMemory = False
+        self.memLayer = None
+        self.writer = None
+
+        if self.fileName.startswith(self.MEMORY_LAYER_PREFIX):
+            self.isMemory = True
+
+            uri = self.TYPE_MAP[geometryType]
+            if crs.isValid():
+              uri += "?crs=" + crs.authid()
+            self.memLayer = QgsVectorLayer(uri, self.fileName, "memory")
+            self.writer = self.memLayer.dataProvider()
+            self.writer.addAttributes(fields.values())
+            self.memLayer.updateFieldMap()
+        else:
+            formats = QgsVectorFileWriter.supportedFiltersAndFormats()
+            OGRCodes = {}
+            for key, value in formats.items():
+                extension = str(key)
+                extension = extension[extension.find('*.') + 2:]
+                extension = extension[:extension.find(" ")]
+                OGRCodes[extension] = value
+
+            extension = self.fileName[self.fileName.find(".") + 1:]
+            self.writer = QgsVectorFileWriter(self.fileName, encoding, fields, geometryType, crs, OGRCodes[extension])
+
+    def addFeature(self, feature):
+        if self.isMemory:
+            self.writer.addFeatures([feature])
+        else:
+            self.writer.addFeature(feature)