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[generator] Ensure non-constant static interface fields are generated as interface properties.
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4 files changed

+166
-5
lines changed

4 files changed

+166
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‎tests/generator-Tests/Unit-Tests/CodeGeneratorExpectedResults/JavaInterop1/WriteInterfaceFieldAsDimProperty.txt‎

Lines changed: 126 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,126 @@
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[Register ("com/xamarin/android/MyInterface", DoNotGenerateAcw=true)]
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public abstract class MyInterface : Java.Lang.Object {
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internal MyInterface ()
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{
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}
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// Metadata.xml XPath field reference: path="/api/package[@name='com.xamarin.android']/interface[@name='MyInterface']/field[@name='EGL_NATIVE_VISUAL_ID']"
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[Register ("EGL_NATIVE_VISUAL_ID")]
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public const int EglNativeVisualId = (int) 12334;
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// Metadata.xml XPath field reference: path="/api/package[@name='com.xamarin.android']/interface[@name='MyInterface']/field[@name='EGL_NO_SURFACE']"
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[Register ("EGL_NO_SURFACE")]
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public static int EglNoSurface {
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get {
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const string __id = "EGL_NO_SURFACE.I";
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var __v = _members.StaticFields.GetInt32Value (__id);
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return __v;
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}
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set {
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const string __id = "EGL_NO_SURFACE.I";
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try {
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_members.StaticFields.SetValue (__id, value);
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} finally {
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}
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}
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}
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static readonly JniPeerMembers _members = new JniPeerMembers ("com/xamarin/android/MyInterface", typeof (MyInterface));
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}
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[Register ("com/xamarin/android/MyInterface", DoNotGenerateAcw=true)]
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[global::System.Obsolete ("Use the 'MyInterface' type. This type will be removed in a future release.", error: true)]
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public abstract class MyInterfaceConsts : MyInterface {
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private MyInterfaceConsts ()
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{
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}
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}
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// Metadata.xml XPath interface reference: path="/api/package[@name='com.xamarin.android']/interface[@name='MyInterface']"
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[Register ("com/xamarin/android/MyInterface", "", "Com.Xamarin.Android.IMyInterfaceInvoker")]
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public partial interface IMyInterface : IJavaObject, IJavaPeerable {
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private static readonly JniPeerMembers _members = new JniPeerMembers ("com/xamarin/android/MyInterface", typeof (IMyInterface), isInterface: true);
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// Metadata.xml XPath field reference: path="/api/package[@name='com.xamarin.android']/interface[@name='MyInterface']/field[@name='EGL_NO_SURFACE']"
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[Register ("EGL_NO_SURFACE")]
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public static int EglNoSurface {
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get {
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const string __id = "EGL_NO_SURFACE.I";
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var __v = _members.StaticFields.GetInt32Value (__id);
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return __v;
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}
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set {
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const string __id = "EGL_NO_SURFACE.I";
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try {
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_members.StaticFields.SetValue (__id, value);
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} finally {
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}
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}
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}
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}
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[global::Android.Runtime.Register ("com/xamarin/android/MyInterface", DoNotGenerateAcw=true)]
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internal partial class IMyInterfaceInvoker : global::Java.Lang.Object, IMyInterface {
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static readonly JniPeerMembers _members = new JniPeerMembers ("com/xamarin/android/MyInterface", typeof (IMyInterfaceInvoker));
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static IntPtr java_class_ref {
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get { return _members.JniPeerType.PeerReference.Handle; }
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}
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[global::System.Diagnostics.DebuggerBrowsable (global::System.Diagnostics.DebuggerBrowsableState.Never)]
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[global::System.ComponentModel.EditorBrowsable (global::System.ComponentModel.EditorBrowsableState.Never)]
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public override global::Java.Interop.JniPeerMembers JniPeerMembers {
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get { return _members; }
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}
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[global::System.Diagnostics.DebuggerBrowsable (global::System.Diagnostics.DebuggerBrowsableState.Never)]
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[global::System.ComponentModel.EditorBrowsable (global::System.ComponentModel.EditorBrowsableState.Never)]
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protected override IntPtr ThresholdClass {
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get { return class_ref; }
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}
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[global::System.Diagnostics.DebuggerBrowsable (global::System.Diagnostics.DebuggerBrowsableState.Never)]
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[global::System.ComponentModel.EditorBrowsable (global::System.ComponentModel.EditorBrowsableState.Never)]
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protected override global::System.Type ThresholdType {
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get { return _members.ManagedPeerType; }
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}
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IntPtr class_ref;
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public static IMyInterface GetObject (IntPtr handle, JniHandleOwnership transfer)
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{
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return global::Java.Lang.Object.GetObject<IMyInterface> (handle, transfer);
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}
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static IntPtr Validate (IntPtr handle)
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{
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if (!JNIEnv.IsInstanceOf (handle, java_class_ref))
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throw new InvalidCastException ($"Unable to convert instance of type '{JNIEnv.GetClassNameFromInstance (handle)}' to type 'com.xamarin.android.MyInterface'.");
108+
return handle;
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}
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protected override void Dispose (bool disposing)
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{
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if (this.class_ref != IntPtr.Zero)
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JNIEnv.DeleteGlobalRef (this.class_ref);
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this.class_ref = IntPtr.Zero;
116+
base.Dispose (disposing);
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}
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public IMyInterfaceInvoker (IntPtr handle, JniHandleOwnership transfer) : base (Validate (handle), transfer)
120+
{
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IntPtr local_ref = JNIEnv.GetObjectClass (((global::Java.Lang.Object) this).Handle);
122+
this.class_ref = JNIEnv.NewGlobalRef (local_ref);
123+
JNIEnv.DeleteLocalRef (local_ref);
124+
}
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}

‎tests/generator-Tests/Unit-Tests/DefaultInterfaceMethodsTests.cs‎

Lines changed: 26 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -462,5 +462,31 @@ public void GenerateProperNestedInterfaceSignatures ()
462462
Assert.True (generated.Contains ("GetOnActivityDestroyed_IHandler:Com.Xamarin.Android.Application/IActivityLifecycleInterface, MyAssembly"));
463463
Assert.False (generated.Contains ("GetOnActivityDestroyed_IHandler:Com.Xamarin.Android.Application.IActivityLifecycleInterface, MyAssembly"));
464464
}
465+
466+
[Test]
467+
public void WriteInterfaceFieldAsDimProperty ()
468+
{
469+
// Ensure we write interface fields that are not constant, and thus must be written as properties
470+
var xml = @"<api>
471+
<package name='com.xamarin.android' jni-name='com/xamarin/android'>
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<interface abstract='true' deprecated='not deprecated' final='false' name='MyInterface' static='false' visibility='public' jni-signature='Lcom/xamarin/android/MyInterface;'>
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<field deprecated='not deprecated' final='true' name='EGL_NATIVE_VISUAL_ID' jni-signature='I' static='true' transient='false' type='int' type-generic-aware='int' value='12334' visibility='public' volatile='false'></field>
474+
<field deprecated='not deprecated' final='false' name='EGL_NO_SURFACE' jni-signature='I' static='true' transient='false' type='int' type-generic-aware='int' visibility='public' volatile='false'></field>
475+
</interface>
476+
</package>
477+
</api>";
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var gens = ParseApiDefinition (xml);
480+
var iface = gens.OfType<InterfaceGen> ().Single ();
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482+
var result = iface.Validate (options, new GenericParameterDefinitionList (), new CodeGeneratorContext ());
483+
Assert.True (result);
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generator.WriteType (iface, string.Empty, new GenerationInfo (string.Empty, string.Empty, "MyAssembly"));
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var generated = writer.ToString ();
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Assert.AreEqual (GetTargetedExpected (nameof (WriteInterfaceFieldAsDimProperty)), writer.ToString ().NormalizeLineEndings ());
490+
}
465491
}
466492
}

‎tools/generator/Java.Interop.Tools.Generator.ObjectModel/InterfaceGen.cs‎

Lines changed: 12 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -149,14 +149,23 @@ internal string GetEventDelegateName (Method m)
149149
// These are fields that we currently support generating on the interface with DIM
150150
public IEnumerable<Field> GetGeneratableFields (CodeGenerationOptions options)
151151
{
152-
if (!options.SupportInterfaceConstants)
153-
return Enumerable.Empty<Field> ();
152+
var fields = new List<Field> ();
154153

155-
return Fields.Where (f => !f.NeedsProperty && !(f.DeprecatedComment?.Contains ("constant will be removed") == true));
154+
// Constant fields
155+
if (options.SupportInterfaceConstants)
156+
fields.AddRange (Fields.Where (f => !f.NeedsProperty && !(f.DeprecatedComment?.Contains ("constant will be removed") == true)));
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158+
// Invoked fields exposed as properties
159+
if (options.SupportDefaultInterfaceMethods)
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fields.AddRange (Fields.Where (f => f.NeedsProperty && !(f.DeprecatedComment?.Contains ("constant will be removed") == true)));
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return fields;
156163
}
157164

158165
public bool HasDefaultMethods => GetAllMethods ().Any (m => m.IsInterfaceDefaultMethod);
159166

167+
public bool HasFieldsAsProperties => Fields.Any (f => f.NeedsProperty);
168+
160169
public bool HasStaticMethods => GetAllMethods ().Any (m => m.IsStatic);
161170

162171
public bool IsConstSugar (CodeGenerationOptions options)

‎tools/generator/SourceWriters/BoundInterface.cs‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -153,14 +153,14 @@ void AddInheritedInterfaces (InterfaceGen iface, CodeGenerationOptions opt)
153153

154154
void AddClassHandle (InterfaceGen iface, CodeGenerationOptions opt)
155155
{
156-
if (opt.SupportDefaultInterfaceMethods && (iface.HasDefaultMethods || iface.HasStaticMethods))
156+
if (opt.SupportDefaultInterfaceMethods && (iface.HasDefaultMethods || iface.HasStaticMethods || iface.HasFieldsAsProperties))
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Fields.Add (new PeerMembersField (opt, iface.RawJniName, iface.Name, true));
158158
}
159159

160160
void AddFields (InterfaceGen iface, CodeGenerationOptions opt, CodeGeneratorContext context)
161161
{
162162
// Interface fields are only supported with DIM
163-
if (!opt.SupportInterfaceConstants)
163+
if (!opt.SupportInterfaceConstants && !opt.SupportDefaultInterfaceMethods)
164164
return;
165165

166166
var seen = new HashSet<string> ();

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