Add support for skipping/ignoring properties/fields

.gitignore

@@ -7,4 +7,9 @@
 [Tt]ools/*
 ![Tt]ools/packages.config
 [Aa]rtifacts/
-.[Dd]otnet/
+.[Dd]otnet/
+/.vs/LitJSON/v15/Server/sqlite3/storage.ide-wal
+/.vs/LitJSON/v15/Server/sqlite3/storage.ide-shm
+/.vs/LitJSON/v15/Server/sqlite3/storage.ide
+/.vs/LitJSON/v15/Server/sqlite3/db.lock
+/.vs/LitJSON/v15/.suo

LitJSON.sln

@@ -1,11 +1,10 @@
-
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
 VisualStudioVersion = 15.0.26124.0
 MinimumVisualStudioVersion = 15.0.26124.0
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LitJSON", "src\LitJson\LitJSON.csproj", "{CFBC33D5-BB2D-4F22-B157-0862C4A77039}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LitJSON", "src\LitJson\LitJSON.csproj", "{CFBC33D5-BB2D-4F22-B157-0862C4A77039}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LitJSON.Tests", "test\LitJSON.Tests.csproj", "{E031C1B4-CD87-475E-9283-4571435C65DB}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LitJSON.Tests", "test\LitJSON.Tests.csproj", "{E031C1B4-CD87-475E-9283-4571435C65DB}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -16,33 +15,36 @@ Global
 		Release|x64 = Release|x64
 		Release|x86 = Release|x86
 	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x64.ActiveCfg = Debug|x64
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x64.Build.0 = Debug|x64
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x86.ActiveCfg = Debug|x86
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x86.Build.0 = Debug|x86
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x64.Build.0 = Debug|Any CPU
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Debug|x86.Build.0 = Debug|Any CPU
 		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|Any CPU.Build.0 = Release|Any CPU
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x64.ActiveCfg = Release|x64
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x64.Build.0 = Release|x64
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x86.ActiveCfg = Release|x86
-		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x86.Build.0 = Release|x86
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x64.ActiveCfg = Release|Any CPU
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x64.Build.0 = Release|Any CPU
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x86.ActiveCfg = Release|Any CPU
+		{CFBC33D5-BB2D-4F22-B157-0862C4A77039}.Release|x86.Build.0 = Release|Any CPU
 		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x64.ActiveCfg = Debug|x64
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x64.Build.0 = Debug|x64
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x86.ActiveCfg = Debug|x86
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x86.Build.0 = Debug|x86
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x64.Build.0 = Debug|Any CPU
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Debug|x86.Build.0 = Debug|Any CPU
 		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|Any CPU.Build.0 = Release|Any CPU
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x64.ActiveCfg = Release|x64
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x64.Build.0 = Release|x64
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x86.ActiveCfg = Release|x86
-		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x86.Build.0 = Release|x86
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x64.ActiveCfg = Release|Any CPU
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x64.Build.0 = Release|Any CPU
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x86.ActiveCfg = Release|Any CPU
+		{E031C1B4-CD87-475E-9283-4571435C65DB}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {9A5469A6-8024-4079-916D-98C17F3C01BB}
 	EndGlobalSection
 EndGlobal

src/LitJson/JsonMapper.cs

@@ -9,6 +9,7 @@
 #endregion
 
 
+using LitJSON;
 using System;
 using System.Collections;
 using System.Collections.Generic;
@@ -825,6 +826,14 @@ private static void WriteValue (object obj, JsonWriter writer,
 
             writer.WriteObjectStart ();
             foreach (PropertyMetadata p_data in props) {
+
+                var skipAttributesList = p_data.Info.GetCustomAttributes(typeof(JsonSkipAttribute), true);
+                var skipAttributes = skipAttributesList as ICollection<Attribute>;
+                if ( skipAttributes.Count > 0 )
+                {
+                    continue;
+                }
+
                 if (p_data.IsField) {
                     writer.WritePropertyName (p_data.Info.Name);
                     WriteValue (((FieldInfo) p_data.Info).GetValue (obj),

src/LitJson/JsonSkipAttribute.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace LitJSON
+{
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false)]
+    public sealed class JsonSkipAttribute : Attribute
+    {
+    }
+}

test/JsonMapperTest.cs

@@ -10,6 +10,7 @@
 
 
 using LitJson;
+using LitJSON;
 using NUnit.Framework;
 using System;
 using System.Collections;
@@ -201,6 +202,93 @@ public class NullableEnumTest
         public NullableEnum? TestEnum;
     }
 
+    public class ClassWithSkippedProperty
+    {
+        private int _x;
+        private int _y;
+        public ClassWithSkippedProperty(int x, int y)
+        {
+            this._x = x;
+            this._y = y;
+        }
+
+        [JsonSkip]
+        public static ClassWithSkippedProperty Zero
+        {
+            get
+            {
+                return new ClassWithSkippedProperty(0, 0);
+            }
+        }
+
+        public int X
+        {
+            get
+            {
+                return _x;
+            }
+            set
+            {
+                _x = value;
+            }
+        }
+        public int Y
+        {
+            get
+            {
+                return _y;
+            }
+            set
+            {
+                _y = value;
+            }
+        }
+
+    }
+
+    public class ClassWithSkippedField
+    {
+        private int _x;
+        private int _y;
+        private ClassWithSkippedField(int x, int y)
+        {
+            this._x = x;
+            this._y = y;
+        }
+
+        [JsonSkip]
+        public ClassWithSkippedField Instance;
+
+        public static ClassWithSkippedField GetNewInstance(int x, int y)
+        {
+            return new ClassWithSkippedField(x, y);
+        }
+
+        public int X
+        {
+            get
+            {
+                return _x;
+            }
+            set
+            {
+                _x = value;
+            }
+        }
+        public int Y
+        {
+            get
+            {
+                return _y;
+            }
+            set
+            {
+                _y = value;
+            }
+        }
+
+    }
+
     [TestFixture]
     public class JsonMapperTest
     {
@@ -410,6 +498,24 @@ public void ExportValueTypesTest ()
             Assert.AreEqual (expected, json);
         }
 
+        [Test]
+        public void ExportSkippedPropertyTest()
+        {
+            ClassWithSkippedProperty objWithSkippedProperty = new ClassWithSkippedProperty(2, 4);
+            var json = JsonMapper.ToJson(objWithSkippedProperty);
+            var expectedJSON = "{\"X\":2,\"Y\":4}";
+            Assert.AreEqual(json, expectedJSON);
+        }
+
+        [Test]
+        public void ExportSkippedFieldTest()
+        {
+            ClassWithSkippedField objWithSkippedField = ClassWithSkippedField.GetNewInstance(2, 4);
+            var json = JsonMapper.ToJson(objWithSkippedField);
+            var expectedJSON = "{\"X\":2,\"Y\":4}";
+            Assert.AreEqual(json, expectedJSON);
+        }
+
         [Test]
         public void ImportArrayOfStringsTest ()
         {
@@ -1033,5 +1139,23 @@ public void NullableEnumExportTest()
             expectedJson = "{\"TestEnum\":null}";
             Assert.AreEqual(expectedJson, JsonMapper.ToJson(value));
         }
+
+        [Test]
+        public void SKipAttribute_PropertyTest()
+        {
+            var result = JsonMapper.ToJson(new ClassWithSkippedProperty(8, 2));
+            string expectedJson = "{\"X\":8,\"Y\":2}";
+            Assert.AreEqual(expectedJson, result);
+
+        }
+
+        [Test]
+        public void SKipAttribute_FieldTest()
+        {
+            var result = JsonMapper.ToJson(ClassWithSkippedField.GetNewInstance(8, 2));
+            string expectedJson = "{\"X\":8,\"Y\":2}";
+            Assert.AreEqual(expectedJson, result);
+
+        }
     }
 }