Add the validator attribute, validation rule and validator

Microsoft.OpenApi.sln

@@ -15,9 +15,9 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.OpenApi.Workbench
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.OpenApi.Readers", "src\Microsoft.OpenApi.Readers\Microsoft.OpenApi.Readers.csproj", "{79933258-0126-4382-8755-D50820ECC483}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.OpenApi.Tests", "test\Microsoft.OpenApi.Tests\Microsoft.OpenApi.Tests.csproj", "{AD83F991-DBF3-4251-8613-9CC54C826964}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.OpenApi.Tests", "test\Microsoft.OpenApi.Tests\Microsoft.OpenApi.Tests.csproj", "{AD83F991-DBF3-4251-8613-9CC54C826964}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.OpenApi.Readers.Tests", "test\Microsoft.OpenApi.Readers.Tests\Microsoft.OpenApi.Readers.Tests.csproj", "{1ED3C2C1-E1E7-4925-B4E6-2D969C3F5237}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.OpenApi.Readers.Tests", "test\Microsoft.OpenApi.Readers.Tests\Microsoft.OpenApi.Readers.Tests.csproj", "{1ED3C2C1-E1E7-4925-B4E6-2D969C3F5237}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{E546B92F-20A8-49C3-8323-4B25BB78F3E1}"
 EndProject

src/Microsoft.OpenApi/Models/OpenApiCallback.cs

@@ -5,13 +5,16 @@
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Expressions;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Callback Object: A map of possible out-of band callbacks related to the parent operation.
     /// </summary>
+    [OpenApiValidator(typeof(CallbackValidator))]
     public class OpenApiCallback : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiComponents.cs

@@ -4,13 +4,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Components Object.
     /// </summary>
+    [OpenApiValidator(typeof(ComponentsValidator))]
     public class OpenApiComponents : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiContact.cs

@@ -5,13 +5,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Contact Object.
     /// </summary>
+    [OpenApiValidator(typeof(ContactValidator))]
     public class OpenApiContact : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiDiscriminator.cs

@@ -3,13 +3,16 @@
 
 using System.Collections.Generic;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Discriminator object.
     /// </summary>
+    [OpenApiValidator(typeof(DiscriminatorValidator))]
     public class OpenApiDiscriminator : IOpenApiSerializable
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiDocument.cs

@@ -6,13 +6,16 @@
 using System.Linq;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Describes an Open API Document. See: https://swagger.io/specification
     /// </summary>
+    [OpenApiValidator(typeof(DocumentValidator))]
     public class OpenApiDocument : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiEncoding.cs

@@ -5,13 +5,16 @@
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Extensions;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// ExternalDocs object.
     /// </summary>
+    [OpenApiValidator(typeof(EncodingValidator))]
     public class OpenApiEncoding : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiExample.cs

@@ -4,13 +4,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Example Object.
     /// </summary>
+    [OpenApiValidator(typeof(ExampleValidator))]
     public class OpenApiExample : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiExternalDocs.cs

@@ -5,13 +5,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// ExternalDocs object.
     /// </summary>
+    [OpenApiValidator(typeof(ExampleValidator))]
     public class OpenApiExternalDocs : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiHeader.cs

@@ -5,6 +5,8 @@
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Extensions;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
@@ -13,6 +15,7 @@ namespace Microsoft.OpenApi.Models
     /// Header Object.
     /// The Header Object follows the structure of the Parameter Object.
     /// </summary>
+    [OpenApiValidator(typeof(HeaderValidator))]
     public class OpenApiHeader : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiInfo.cs

@@ -5,13 +5,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Open API Info Object, it provides the metadata about the Open API.
     /// </summary>
+    [OpenApiValidator(typeof(InfoValidator))]
     public class OpenApiInfo : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiLicense.cs

@@ -5,13 +5,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// License Object.
     /// </summary>
+    [OpenApiValidator(typeof(LicenseValidator))]
     public class OpenApiLicense : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiLink.cs

@@ -4,13 +4,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Link Object.
     /// </summary>
+    [OpenApiValidator(typeof(LinkValidator))]
     public class OpenApiLink : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiMediaType.cs

@@ -4,13 +4,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Media Type Object.
     /// </summary>
+    [OpenApiValidator(typeof(MediaTypeValidator))]
     public class OpenApiMediaType : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiOAuthFlow.cs

@@ -5,13 +5,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// OAuth Flow Object.
     /// </summary>
+    [OpenApiValidator(typeof(OAuthFlowValidator))]
     public class OpenApiOAuthFlow : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiOAuthFlows.cs

@@ -4,13 +4,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// OAuth Flows Object.
     /// </summary>
+    [OpenApiValidator(typeof(OAuthFlowsValidator))]
     public class OpenApiOAuthFlows : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiOperation.cs

@@ -6,13 +6,16 @@
 using System.Linq;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Operation Object.
     /// </summary>
+    [OpenApiValidator(typeof(OperationValidator))]
     public class OpenApiOperation : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiParameter.cs

@@ -5,13 +5,16 @@
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Extensions;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Parameter Object.
     /// </summary>
+    [OpenApiValidator(typeof(ParameterValidator))]
     public class OpenApiParameter : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiPathItem.cs

@@ -5,13 +5,16 @@
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Extensions;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Path Item Object: to describe the operations available on a single path.
     /// </summary>
+    [OpenApiValidator(typeof(PathItemValidator))]
     public class OpenApiPathItem : IOpenApiSerializable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiPaths.cs

@@ -1,11 +1,15 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license. 
 
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
+
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Paths object.
     /// </summary>
+    [OpenApiValidator(typeof(PathsValidator))]
     public class OpenApiPaths : OpenApiExtensibleDictionary<OpenApiPathItem>
     {
     }

src/Microsoft.OpenApi/Models/OpenApiRequestBody.cs

@@ -4,13 +4,16 @@
 using System.Collections.Generic;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Request Body Object
     /// </summary>
+    [OpenApiValidator(typeof(RequestBodyValidator))]
     public class OpenApiRequestBody : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiResponse.cs

@@ -5,13 +5,16 @@
 using System.Linq;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Interfaces;
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
 using Microsoft.OpenApi.Writers;
 
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Response object.
     /// </summary>
+    [OpenApiValidator(typeof(ResponseValidator))]
     public class OpenApiResponse : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiResponses.cs

@@ -1,11 +1,15 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license. 
 
+using Microsoft.OpenApi.Validations;
+using Microsoft.OpenApi.Validations.Validators;
+
 namespace Microsoft.OpenApi.Models
 {
     /// <summary>
     /// Responses object.
     /// </summary>
+    [OpenApiValidator(typeof(ResponsesValidator))]
     public class OpenApiResponses : OpenApiExtensibleDictionary<OpenApiResponse>
     {
     }