[BUGFIX] QgsCurvePolygonV2::asGML, add interior ring only if one exists

Author: rldhont

src/core/geometry/qgscurvepolygonv2.cpp

@@ -300,16 +300,20 @@ QDomElement QgsCurvePolygonV2::asGML2( QDomDocument& doc, int precision, const Q
   elemOuterBoundaryIs.appendChild( outerRing );
   delete exteriorLineString;
   elemPolygon.appendChild( elemOuterBoundaryIs );
-  QDomElement elemInnerBoundaryIs = doc.createElementNS( ns, "innerBoundaryIs" );
-  for ( int i = 0, n = numInteriorRings(); i < n; ++i )
+  int n = numInteriorRings();
+  if ( n > 0 )
   {
-    QgsLineStringV2* interiorLineString = interiorRing( i )->curveToLine();
-    QDomElement innerRing = interiorLineString->asGML2( doc, precision, ns );
-    innerRing.toElement().setTagName( "LinearRing" );
-    elemInnerBoundaryIs.appendChild( innerRing );
-    delete interiorLineString;
+    QDomElement elemInnerBoundaryIs = doc.createElementNS( ns, "innerBoundaryIs" );
+    for ( int i = 0; i < n; ++i )
+    {
+      QgsLineStringV2* interiorLineString = interiorRing( i )->curveToLine();
+      QDomElement innerRing = interiorLineString->asGML2( doc, precision, ns );
+      innerRing.toElement().setTagName( "LinearRing" );
+      elemInnerBoundaryIs.appendChild( innerRing );
+      delete interiorLineString;
+    }
+    elemPolygon.appendChild( elemInnerBoundaryIs );
   }
-  elemPolygon.appendChild( elemInnerBoundaryIs );
   return elemPolygon;
 }
 
@@ -321,14 +325,18 @@ QDomElement QgsCurvePolygonV2::asGML3( QDomDocument& doc, int precision, const Q
   outerRing.toElement().setTagName( "LinearRing" );
   elemExterior.appendChild( outerRing );
   elemCurvePolygon.appendChild( elemExterior );
-  QDomElement elemInterior = doc.createElementNS( ns, "interior" );
-  for ( int i = 0, n = numInteriorRings(); i < n; ++i )
+  int n = numInteriorRings();
+  if ( n > 0 )
   {
-    QDomElement innerRing = interiorRing( i )->asGML2( doc, precision, ns );
-    innerRing.toElement().setTagName( "LinearRing" );
-    elemInterior.appendChild( innerRing );
+    QDomElement elemInterior = doc.createElementNS( ns, "interior" );
+    for ( int i = 0; i < n; ++i )
+    {
+      QDomElement innerRing = interiorRing( i )->asGML2( doc, precision, ns );
+      innerRing.toElement().setTagName( "LinearRing" );
+      elemInterior.appendChild( innerRing );
+    }
+    elemCurvePolygon.appendChild( elemInterior );
   }
-  elemCurvePolygon.appendChild( elemInterior );
   return elemCurvePolygon;
 }
 

tests/src/core/testqgsgeometry.cpp

@@ -2840,12 +2840,29 @@ void TestQgsGeometry::polygonV2()
                   << QgsPointV2( QgsWKBTypes::Point, 0, 10 ) << QgsPointV2( QgsWKBTypes::Point, 10, 10 )
                   << QgsPointV2( QgsWKBTypes::Point, 10, 0 ) << QgsPointV2( QgsWKBTypes::Point, 0, 0 ) );
   exportPolygon.setExteriorRing( ext );
+
+  // GML document for compare
+  QDomDocument doc( "gml" );
+
+  // as GML2
+  QString expectedSimpleGML2( "<Polygon xmlns=\"gml\"><outerBoundaryIs xmlns=\"gml\"><LinearRing xmlns=\"gml\"><coordinates xmlns=\"gml\">0,0 0,10 10,10 10,0 0,0</coordinates></LinearRing></outerBoundaryIs></Polygon>" );
+  QCOMPARE( elemToString( exportPolygon.asGML2( doc ) ), expectedSimpleGML2 );
+
+  //as GML3
+  QString expectedSimpleGML3( "<Polygon xmlns=\"gml\"><exterior xmlns=\"gml\"><LinearRing xmlns=\"gml\"><coordinates xmlns=\"gml\">0,0 0,10 10,10 10,0 0,0</coordinates></LinearRing></exterior></Polygon>" );
+  QCOMPARE( elemToString( exportPolygon.asGML3( doc ) ), expectedSimpleGML3 );
+
+  // as JSON
+  QString expectedSimpleJson( "{\"type\": \"Polygon\", \"coordinates\": [[ [0, 0], [0, 10], [10, 10], [10, 0], [0, 0]]] }" );
+  QCOMPARE( exportPolygon.asJSON(), expectedSimpleJson );
+
   ring = new QgsLineStringV2();
   ring->setPoints( QgsPointSequenceV2() << QgsPointV2( QgsWKBTypes::Point, 1, 1 )
                    << QgsPointV2( QgsWKBTypes::Point, 1, 9 ) << QgsPointV2( QgsWKBTypes::Point, 9, 9 )
                    << QgsPointV2( QgsWKBTypes::Point, 9, 1 ) << QgsPointV2( QgsWKBTypes::Point, 1, 1 ) );
   exportPolygon.addInteriorRing( ring );
 
+  // as JSON
   QString expectedJson( "{\"type\": \"Polygon\", \"coordinates\": [[ [0, 0], [0, 10], [10, 10], [10, 0], [0, 0]], [ [1, 1], [1, 9], [9, 9], [9, 1], [1, 1]]] }" );
   QCOMPARE( exportPolygon.asJSON(), expectedJson );
 
@@ -2861,11 +2878,11 @@ void TestQgsGeometry::polygonV2()
                    << QgsPointV2( QgsWKBTypes::Point, 4 / 3.0, 2 / 3.0 ) << QgsPointV2( QgsWKBTypes::Point, 2 / 3.0, 2 / 3.0 ) );
   exportPolygonFloat.addInteriorRing( ring );
 
+  // as JSON
   QString expectedJsonPrec3( "{\"type\": \"Polygon\", \"coordinates\": [[ [1.111, 1.111], [1.111, 11.111], [11.111, 11.111], [11.111, 1.111], [1.111, 1.111]], [ [0.667, 0.667], [0.667, 1.333], [1.333, 1.333], [1.333, 0.667], [0.667, 0.667]]] }" );
   QCOMPARE( exportPolygonFloat.asJSON( 3 ), expectedJsonPrec3 );
 
   // as GML2
-  QDomDocument doc( "gml" );
   QString expectedGML2( "<Polygon xmlns=\"gml\"><outerBoundaryIs xmlns=\"gml\"><LinearRing xmlns=\"gml\"><coordinates xmlns=\"gml\">0,0 0,10 10,10 10,0 0,0</coordinates></LinearRing></outerBoundaryIs>" );
   expectedGML2 += QString( "<innerBoundaryIs xmlns=\"gml\"><LinearRing xmlns=\"gml\"><coordinates xmlns=\"gml\">1,1 1,9 9,9 9,1 1,1</coordinates></LinearRing></innerBoundaryIs></Polygon>" );
   QCOMPARE( elemToString( exportPolygon.asGML2( doc ) ), expectedGML2 );