Handle "starts with" and "ends with" case.

Author: jpobst

src/Java.Interop.Tools.Generator/Metadata/FixupXmlDocument.cs

@@ -169,7 +169,7 @@ public void Apply (ApiXmlDocument apiDocument, string apiLevelString, int produc
 			}
 		}
 
-		public List<NamespaceTransform> GetNamespaceTransforms ()
+		public IList<NamespaceTransform> GetNamespaceTransforms ()
 		{
 			var list = new List<NamespaceTransform> ();
 

src/Java.Interop.Tools.Generator/Metadata/NamespaceTransform.cs

@@ -45,6 +45,15 @@ public string ApplyInternal (string value)
 
 		public string Apply (string value)
 		{
+			// Handle a "starts with" and "ends with" transform
+			if (IsStartsWith && IsEndsWith) {
+				if (value.Equals (OldValue, StringComparison.OrdinalIgnoreCase))
+					return NewValue;
+
+				// Don't let this fall through
+				return value;
+			}
+
 			// Handle a "starts with" transform
 			if (IsStartsWith) {
 				if (value.StartsWith (OldValue, StringComparison.OrdinalIgnoreCase))
@@ -78,7 +87,7 @@ public string Apply (string value)
 				}
 			}
 
-			return string.Join (".", results.ToArray ());
+			return string.Join (".", results);
 		}
 
 		public static bool TryParse (XElement element, [NotNullWhen (true)] out NamespaceTransform? transform)

tests/Java.Interop.Tools.Generator-Tests/Metadata/NamespaceTransformTests.cs

@@ -78,6 +78,12 @@ public void GetTransformedNamespace ()
 			AssertTransformedNamespace ("Androidx.Androidx.Core", "AndroidX.AndroidX.Core", new NamespaceTransform ("androidx", "AndroidX"));
 			AssertTransformedNamespace ("google.androidx.Core", "Xamarin.AndroidX.Core", new NamespaceTransform ("androidx", "AndroidX"), new NamespaceTransform ("google", "Xamarin"));
 
+			// Starts with and ends with
+			AssertTransformedNamespace ("example", "Transformed", new NamespaceTransform (".example.", "Transformed"));
+			AssertTransformedNamespace ("Androidx.Core", "Transformed", new NamespaceTransform (".Androidx.Core.", "Transformed"));
+			AssertTransformedNamespace ("Androidx.Core", "Androidx.Core", new NamespaceTransform (".Core.", "Transformed"));
+			AssertTransformedNamespace ("Androidx.Core", "Androidx.Core", new NamespaceTransform (".AndroidX.", "Transformed"));
+
 			// Starts with
 			AssertTransformedNamespace ("Androidx.Androidx.Core", "AndroidX2.Androidx.Core", new NamespaceTransform ("AndroidX.", "AndroidX2"));
 			AssertTransformedNamespace ("Androidx.Androidx.Core", "Androidx.Core", new NamespaceTransform ("AndroidX.", ""));