Revert "Fix extraction of ogr LayerName from multi-layer dataset URIs"

This reverts commit 6c5364186dd8d45ac51e5bd1a72c6a542f032cb1.

As it breaks all OGR geoprocessing algoroithms.

python/plugins/processing/tests/ToolsTest.py

@@ -31,72 +31,17 @@ from processing.tools import vector
 from qgis.core import (QgsVectorLayer, QgsFeatureRequest)
 from processing.core.ProcessingConfig import ProcessingConfig
 
-import os.path
-import errno
-import shutil
-
-dataFolder = os.path.join(os.path.dirname(__file__), '../../../../tests/testdata/')
-tmpBaseFolder = os.path.join(os.sep, 'tmp', 'qgis_test', str(os.getpid()))
-
-
-def mkDirP(path):
-    try:
-        os.makedirs(path)
-    except OSError as exc:
-        if exc.errno == errno.EEXIST and os.path.isdir(path):
-            pass
-        else:
-            raise
-
 start_app()
 
 
 class VectorTest(unittest.TestCase):
 
-    @classmethod
-    def setUpClass(cls):
-        mkDirP(tmpBaseFolder)
-
-    @classmethod
-    def tearDownClass(cls):
-        shutil.rmtree(tmpBaseFolder)
-        pass
-
-    # See http://hub.qgis.org/issues/15698
-    def test_ogrLayerName(self):
-        tmpdir = os.path.join(tmpBaseFolder, 'ogrLayerName')
-        os.mkdir(tmpdir)
-
-        def linkTestfile(f, t):
-            os.link(os.path.join(dataFolder, f), os.path.join(tmpdir, t))
-
         # URI from OGR provider
-        linkTestfile('geom_data.csv', 'a.csv')
-        name = vector.ogrLayerName(tmpdir)
-        self.assertEqual(name, 'a')
-
         # URI from OGR provider
-        linkTestfile('wkt_data.csv', 'b.csv')
-        name = vector.ogrLayerName(tmpdir + '|layerid=0')
-        self.assertEqual(name, 'a')
-        name = vector.ogrLayerName(tmpdir + '|layerid=1')
-        self.assertEqual(name, 'b')
-
         # URI from OGR provider
-        name = vector.ogrLayerName(tmpdir + '|layerid=2')
-        self.assertEqual(name, 'invalid-layerid')
-
         # URI from OGR provider
-        name = vector.ogrLayerName(tmpdir + '|layername=f')
-        self.assertEqual(name, 'f') # layername takes precedence
-
         # URI from OGR provider
-        name = vector.ogrLayerName(tmpdir + '|layerid=0|layername=f2')
-        self.assertEqual(name, 'f2') # layername takes precedence
-
         # URI from OGR provider
-        name = vector.ogrLayerName(tmpdir + '|layername=f2|layerid=0')
-        self.assertEqual(name, 'f2') # layername takes precedence
 
         # URI from Sqlite provider
         name = vector.ogrLayerName('dbname=\'/tmp/x.sqlite\' table="t" (geometry) sql=')
@@ -105,7 +50,6 @@ class VectorTest(unittest.TestCase):
         # URI from PostgreSQL provider
         name = vector.ogrLayerName('port=5493 sslmode=disable key=\'edge_id\' srid=0 type=LineString table="city_data"."edge" (geom) sql=')
         self.assertEqual(name, 'city_data.edge')
-
     def testFeatures(self):
         ProcessingConfig.initialize()
 

python/plugins/processing/tools/vector.py

@@ -41,8 +41,6 @@ import io
 
 import psycopg2
 
-from osgeo import ogr
-
 from qgis.PyQt.QtCore import QVariant, QSettings
 from qgis.core import (Qgis, QgsFields, QgsField, QgsGeometry, QgsRectangle, QgsWkbTypes,
                        QgsSpatialIndex, QgsMapLayerRegistry, QgsMapLayer, QgsVectorLayer,
@@ -558,46 +556,21 @@ def ogrConnectionString(uri):
 # /tmp/x.gdb|layername=thelayer
 #
 def ogrLayerName(uri):
-
-    # handle URIs of database providers
-    if ' table=' in uri:
-        # Matches table="schema"."table"
-        re_table_schema = re.compile(' table="([^"]*)"\."([^"]*)"')
-        r = re_table_schema.search(uri)
-        if r:
-            return r.groups()[0] + '.' + r.groups()[1]
-        # Matches table="table"
-        re_table = re.compile(' table="([^"]*)"')
-        r = re_table.search(uri)
-        if r:
-            return r.groups()[0]
-
-    # handle URIs of OGR provider with explicit layername
-    if 'layername' in uri:
-        regex = re.compile('(layername=)([^|]*)')
+    if 'host' in uri:
+        regex = re.compile('(table=")(.+?)(\.)(.+?)"')
+        r = regex.search(uri)
+        return '"' + r.groups()[1] + '.' + r.groups()[3] + '"'
+    elif 'dbname' in uri:
+        regex = re.compile('(table=")(.+?)"')
         r = regex.search(uri)
         return r.groups()[1]
+    elif 'layername' in uri:
+        regex = re.compile('(layername=)(.*)')
+        r = regex.search(uri)
+        return r.groups()[1]
+    else:
+        return os.path.basename(os.path.splitext(uri)[0])
 
-    fields = uri.split('|')
-    ogruri = fields[0]
-    fields = fields[1:]
-    layerid = 0
-    for f in fields:
-        if f.startswith('layername='):
-            # Name encoded in uri, nothing more needed
-            return f.split('=')[1]
-        if f.startswith('layerid='):
-            layerid = int(f.split('=')[1])
-            # Last layerid= takes precedence, to allow of layername to
-            # take precedence
-    ds = ogr.Open(ogruri)
-    if not ds:
-        return "invalid-uri"
-    ly = ds.GetLayer(layerid)
-    if not ly:
-        return "invalid-layerid"
-    name = ly.GetName()
-    return name
 
 
 class VectorWriter(object):