Fix KMLReader to read coordinates with whitespace (#611)

NetTopologySuite · Jun 9, 2022 · e281524 · e281524
1 parent e4e6f3f
commit e281524
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diff --git a/src/NetTopologySuite/IO/KML/KMLReader.cs b/src/NetTopologySuite/IO/KML/KMLReader.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+using System.Text.RegularExpressions;
 using System.Xml;
 using NetTopologySuite.Geometries;
 using NetTopologySuite.Utilities;
@@ -17,6 +18,7 @@ public class KMLReader
         //private final XMLInputFactory inputFactory = XMLInputFactory.newInstance();
         private readonly GeometryFactory geometryFactory;
         private readonly ISet<string> attributeNames;
+        private readonly Regex whitespaceRegex = new Regex(@"\s+");
 
         private const string POINT = "Point";
         private const string LINESTRING = "LineString";
@@ -113,6 +115,8 @@ private Coordinate[] ParseKMLCoordinates(XmlReader xmlStreamReader)
             string coordinates = xmlStreamReader.ReadElementString();
             if (string.IsNullOrWhiteSpace(coordinates))
                 RaiseParseError("Empty coordinates");
+
+            coordinates = whitespaceRegex.Replace(coordinates.Trim(), " ");
 
             double[] parsedOrdinates = {double.NaN, double.NaN, double.NaN};
             var coordinateList = new List<Coordinate>();

diff --git a/test/NetTopologySuite.Tests.NUnit/IO/KML/KMLReaderTest.cs b/test/NetTopologySuite.Tests.NUnit/IO/KML/KMLReaderTest.cs
@@ -248,6 +248,19 @@ public void TestPolygonIssue594()
            new IDictionary<string, string>[] { null }
            );
         }
+
+        [Test]
+        public void TestCoordinatesWithWhitespace()
+        {
+            CheckParsingResult(new KMLReader(),
+                "<LineString>" +
+                "   <coordinates> 1.0,2.0" +
+                "   -1.0,-2.0 </coordinates>" +
+                "</LineString>",
+                "LINESTRING (1 2, -1 -2)",
+                new IDictionary<string, string>[]{ null, null }
+            );
+        }
 
         private void CheckExceptionThrown(string kmlString, string expectedError)
         {