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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Web.Http.Metadata;
using System.Web.Http.Properties;
using System.Web.Http.Validation;
using System.Web.Http.ValueProviders;
namespace System.Web.Http.ModelBinding
{
public class ModelBindingContext
{
private string _modelName;
private ModelStateDictionary _modelState;
private Dictionary<string, ModelMetadata> _propertyMetadata;
private ModelValidationNode _validationNode;
public ModelBindingContext()
: this(null)
{
}
// copies certain values that won't change between parent and child objects,
// e.g. ValueProvider, ModelState
public ModelBindingContext(ModelBindingContext bindingContext)
{
if (bindingContext != null)
{
ModelState = bindingContext.ModelState;
ValueProvider = bindingContext.ValueProvider;
}
}
public object Model
{
get
{
EnsureModelMetadata();
return ModelMetadata.Model;
}
set
{
EnsureModelMetadata();
ModelMetadata.Model = value;
}
}
public ModelMetadata ModelMetadata { get; set; }
public string ModelName
{
get
{
if (_modelName == null)
{
_modelName = String.Empty;
}
return _modelName;
}
set { _modelName = value; }
}
[SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly", Justification = "This is writeable to support unit testing")]
public ModelStateDictionary ModelState
{
get
{
if (_modelState == null)
{
_modelState = new ModelStateDictionary();
}
return _modelState;
}
set { _modelState = value; }
}
public Type ModelType
{
get
{
EnsureModelMetadata();
return ModelMetadata.ModelType;
}
}
public IDictionary<string, ModelMetadata> PropertyMetadata
{
get
{
if (_propertyMetadata == null)
{
_propertyMetadata = ModelMetadata.Properties.ToDictionary(m => m.PropertyName, StringComparer.OrdinalIgnoreCase);
}
return _propertyMetadata;
}
}
public ModelValidationNode ValidationNode
{
get
{
if (_validationNode == null)
{
_validationNode = new ModelValidationNode(ModelMetadata, ModelName);
}
return _validationNode;
}
set { _validationNode = value; }
}
public IValueProvider ValueProvider { get; set; }
public bool FallbackToEmptyPrefix { get; set; }
private void EnsureModelMetadata()
{
if (ModelMetadata == null)
{
throw Error.InvalidOperation(SRResources.ModelBindingContext_ModelMetadataMustBeSet);
}
}
}
}
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