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Copy pathModelMetadataProviders.cs
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562 lines (478 loc) · 13.1 KB
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
namespace ServiceStack.Html
{
[Serializable]
public class ModelStateDictionary : IDictionary<string, ModelState>
{
private readonly Dictionary<string, ModelState> innerDictionary = new Dictionary<string, ModelState>(StringComparer.OrdinalIgnoreCase);
public ModelStateDictionary() {}
public ModelStateDictionary(ModelStateDictionary dictionary)
{
if (dictionary == null)
{
throw new ArgumentNullException("dictionary");
}
foreach (var entry in dictionary)
{
innerDictionary.Add(entry.Key, entry.Value);
}
}
public int Count
{
get
{
return innerDictionary.Count;
}
}
public bool IsReadOnly
{
get
{
return ((IDictionary<string, ModelState>)innerDictionary).IsReadOnly;
}
}
public bool IsValid
{
get
{
return Values.All(modelState => modelState.Errors.Count == 0);
}
}
public ICollection<string> Keys
{
get
{
return innerDictionary.Keys;
}
}
public ModelState this[string key]
{
get
{
ModelState value;
innerDictionary.TryGetValue(key, out value);
return value;
}
set
{
innerDictionary[key] = value;
}
}
public ICollection<ModelState> Values
{
get
{
return innerDictionary.Values;
}
}
public void Add(KeyValuePair<string, ModelState> item)
{
((IDictionary<string, ModelState>)innerDictionary).Add(item);
}
public void Add(string key, ModelState value)
{
innerDictionary.Add(key, value);
}
public void AddModelError(string key, Exception exception)
{
GetModelStateForKey(key).Errors.Add(exception);
}
public void AddModelError(string key, string errorMessage)
{
GetModelStateForKey(key).Errors.Add(errorMessage);
}
public void Clear()
{
innerDictionary.Clear();
}
public bool Contains(KeyValuePair<string, ModelState> item)
{
return ((IDictionary<string, ModelState>)innerDictionary).Contains(item);
}
public bool ContainsKey(string key)
{
return innerDictionary.ContainsKey(key);
}
public void CopyTo(KeyValuePair<string, ModelState>[] array, int arrayIndex)
{
((IDictionary<string, ModelState>)innerDictionary).CopyTo(array, arrayIndex);
}
public IEnumerator<KeyValuePair<string, ModelState>> GetEnumerator()
{
return innerDictionary.GetEnumerator();
}
private ModelState GetModelStateForKey(string key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
ModelState modelState;
if (!TryGetValue(key, out modelState))
{
modelState = new ModelState();
this[key] = modelState;
}
return modelState;
}
public bool IsValidField(string key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
// if the key is not found in the dictionary, we just say that it's valid (since there are no errors)
return DictionaryHelpers.FindKeysWithPrefix(this, key).All(entry => entry.Value.Errors.Count == 0);
}
public void Merge(ModelStateDictionary dictionary)
{
if (dictionary == null)
{
return;
}
foreach (var entry in dictionary)
{
this[entry.Key] = entry.Value;
}
}
public bool Remove(KeyValuePair<string, ModelState> item)
{
return ((IDictionary<string, ModelState>)innerDictionary).Remove(item);
}
public bool Remove(string key)
{
return innerDictionary.Remove(key);
}
public void SetModelValue(string key, ValueProviderResult value)
{
GetModelStateForKey(key).Value = value;
}
public bool TryGetValue(string key, out ModelState value)
{
return innerDictionary.TryGetValue(key, out value);
}
#region IEnumerable Members
IEnumerator IEnumerable.GetEnumerator()
{
return ((IEnumerable)innerDictionary).GetEnumerator();
}
#endregion
}
[Serializable]
public class ModelState
{
private readonly ModelErrorCollection errors = new ModelErrorCollection();
public ValueProviderResult Value
{
get;
set;
}
public ModelErrorCollection Errors
{
get
{
return errors;
}
}
}
[Serializable]
public class ModelErrorCollection : Collection<ModelError>
{
public void Add(Exception exception)
{
Add(new ModelError(exception));
}
public void Add(string errorMessage)
{
Add(new ModelError(errorMessage));
}
}
[Serializable]
public class ModelError
{
public ModelError(Exception exception)
: this(exception, null /* errorMessage */)
{
}
public ModelError(Exception exception, string errorMessage)
: this(errorMessage)
{
if (exception == null)
{
throw new ArgumentNullException("exception");
}
Exception = exception;
}
public ModelError(string errorMessage)
{
ErrorMessage = errorMessage ?? String.Empty;
}
public Exception Exception
{
get;
private set;
}
public string ErrorMessage
{
get;
private set;
}
}
[Serializable]
public class ValueProviderResult
{
private static readonly CultureInfo _staticCulture = CultureInfo.InvariantCulture;
private CultureInfo _instanceCulture;
// default constructor so that subclassed types can set the properties themselves
protected ValueProviderResult()
{
}
public ValueProviderResult(object rawValue, string attemptedValue, CultureInfo culture)
{
RawValue = rawValue;
AttemptedValue = attemptedValue;
Culture = culture;
}
public string AttemptedValue
{
get;
protected set;
}
public CultureInfo Culture
{
get
{
if (_instanceCulture == null)
{
_instanceCulture = _staticCulture;
}
return _instanceCulture;
}
protected set
{
_instanceCulture = value;
}
}
public object RawValue
{
get;
protected set;
}
private static object ConvertSimpleType(CultureInfo culture, object value, Type destinationType)
{
if (value == null || destinationType.IsInstanceOfType(value))
{
return value;
}
// if this is a user-input value but the user didn't type anything, return no value
string valueAsString = value as string;
if (valueAsString != null && valueAsString.Trim().Length == 0)
{
return null;
}
TypeConverter converter = TypeDescriptor.GetConverter(destinationType);
bool canConvertFrom = converter.CanConvertFrom(value.GetType());
if (!canConvertFrom)
{
converter = TypeDescriptor.GetConverter(value.GetType());
}
if (!(canConvertFrom || converter.CanConvertTo(destinationType)))
{
string message = String.Format(CultureInfo.CurrentCulture, MvcResources.ValueProviderResult_NoConverterExists,
value.GetType().FullName, destinationType.FullName);
throw new InvalidOperationException(message);
}
try
{
object convertedValue = (canConvertFrom) ?
converter.ConvertFrom(null /* context */, culture, value) :
converter.ConvertTo(null /* context */, culture, value, destinationType);
return convertedValue;
}
catch (Exception ex)
{
string message = String.Format(CultureInfo.CurrentCulture, MvcResources.ValueProviderResult_ConversionThrew,
value.GetType().FullName, destinationType.FullName);
throw new InvalidOperationException(message, ex);
}
}
public object ConvertTo(Type type)
{
return ConvertTo(type, null /* culture */);
}
public virtual object ConvertTo(Type type, CultureInfo culture)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
CultureInfo cultureToUse = culture ?? Culture;
return UnwrapPossibleArrayType(cultureToUse, RawValue, type);
}
private static object UnwrapPossibleArrayType(CultureInfo culture, object value, Type destinationType)
{
if (value == null || destinationType.IsInstanceOfType(value))
{
return value;
}
// array conversion results in four cases, as below
Array valueAsArray = value as Array;
if (destinationType.IsArray)
{
Type destinationElementType = destinationType.GetElementType();
if (valueAsArray != null)
{
// case 1: both destination + source type are arrays, so convert each element
IList converted = Array.CreateInstance(destinationElementType, valueAsArray.Length);
for (int i = 0; i < valueAsArray.Length; i++)
{
converted[i] = ConvertSimpleType(culture, valueAsArray.GetValue(i), destinationElementType);
}
return converted;
}
else
{
// case 2: destination type is array but source is single element, so wrap element in array + convert
object element = ConvertSimpleType(culture, value, destinationElementType);
IList converted = Array.CreateInstance(destinationElementType, 1);
converted[0] = element;
return converted;
}
}
else if (valueAsArray != null)
{
// case 3: destination type is single element but source is array, so extract first element + convert
if (valueAsArray.Length > 0)
{
value = valueAsArray.GetValue(0);
return ConvertSimpleType(culture, value, destinationType);
}
else
{
// case 3(a): source is empty array, so can't perform conversion
return null;
}
}
// case 4: both destination + source type are single elements, so convert
return ConvertSimpleType(culture, value, destinationType);
}
}
public class EmptyModelMetadataProvider : ModelMetadataProvider
{
protected virtual ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName)
{
return new ModelMetadata(this, containerType, modelAccessor, modelType, propertyName);
}
public override IEnumerable<ModelMetadata> GetMetadataForProperties(object container, Type containerType)
{
return new List<ModelMetadata>();
}
public override ModelMetadata GetMetadataForProperty(Func<object> modelAccessor, Type containerType, string propertyName)
{
return null;
}
public override ModelMetadata GetMetadataForType(Func<object> modelAccessor, Type modelType)
{
return null;
}
}
public class PocoMetadataProvider : ModelMetadataProvider
{
protected virtual ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName)
{
return new ModelMetadata(this, containerType, modelAccessor, modelType, propertyName);
}
public override IEnumerable<ModelMetadata> GetMetadataForProperties(object container, Type containerType)
{
return new List<ModelMetadata>();
}
public override ModelMetadata GetMetadataForProperty(Func<object> modelAccessor, Type containerType, string propertyName)
{
var modelType = containerType; //FIX?
return new ModelMetadata(this, containerType, modelAccessor, modelType, propertyName);
}
public override ModelMetadata GetMetadataForType(Func<object> modelAccessor, Type modelType)
{
return new ModelMetadata(this, null, modelAccessor, modelType, null);
}
}
//public class PocoMetadataProvider<T> {
// static PocoMetadataProvider() {
// var propertyInfos = TypeConfig<T>.Properties; } }
public class ModelMetadataProviders
{
private ModelMetadataProvider currentProvider;
private static readonly ModelMetadataProviders Instance = new ModelMetadataProviders();
internal ModelMetadataProviders()
{
currentProvider = new PocoMetadataProvider();
}
public static ModelMetadataProvider Current
{
get
{
return Instance.CurrentInternal;
}
set
{
Instance.CurrentInternal = value;
}
}
internal ModelMetadataProvider CurrentInternal
{
get
{
return currentProvider;
}
set
{
currentProvider = value ?? new EmptyModelMetadataProvider();
}
}
}
internal interface IResolver<T>
{
T Current { get; }
}
internal static class DictionaryHelpers
{
public static IEnumerable<KeyValuePair<string, TValue>> FindKeysWithPrefix<TValue>(IDictionary<string, TValue> dictionary, string prefix)
{
TValue exactMatchValue;
if (dictionary.TryGetValue(prefix, out exactMatchValue))
{
yield return new KeyValuePair<string, TValue>(prefix, exactMatchValue);
}
foreach (var entry in dictionary)
{
string key = entry.Key;
if (key.Length <= prefix.Length)
{
continue;
}
if (!key.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
continue;
}
char charAfterPrefix = key[prefix.Length];
switch (charAfterPrefix)
{
case '[':
case '.':
yield return entry;
break;
}
}
}
public static bool DoesAnyKeyHavePrefix<TValue>(IDictionary<string, TValue> dictionary, string prefix)
{
return FindKeysWithPrefix(dictionary, prefix).Any();
}
}
}