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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Globalization;
using System.Linq;
using System.Reflection;
using System.Web.Http.OData.Formatter;
using System.Web.Http.OData.Formatter.Serialization;
using System.Web.Http.OData.Properties;
using Microsoft.Data.OData.Query;
namespace System.Web.Http.OData.Builder.Conventions
{
internal static class ConventionsHelpers
{
private static HashSet<Type> _ignoredCollectionTypes = new HashSet<Type>(new Type[] { typeof(string) });
public static string GetEntityKeyValue(EntityInstanceContext entityContext, IEntityTypeConfiguration entityTypeConfiguration)
{
// TODO: BUG 453795: reflection cleanup
if (entityTypeConfiguration.Keys().Count() == 1)
{
return GetUriRepresentationForKeyValue(entityTypeConfiguration.Keys().First().PropertyInfo, entityContext.EntityInstance, entityTypeConfiguration);
}
else
{
return String.Join(
",",
entityTypeConfiguration
.Keys()
.Select(
key => String.Format(CultureInfo.InvariantCulture, "{0}={1}", key.Name, GetUriRepresentationForKeyValue(key.PropertyInfo, entityContext.EntityInstance, entityTypeConfiguration))));
}
}
// Get properties of this entity type that are not already declared in the base entity type and are not already ignored.
public static IEnumerable<PropertyInfo> GetProperties(IEntityTypeConfiguration entity)
{
IEnumerable<PropertyInfo> allProperties = GetAllProperties(entity as IStructuralTypeConfiguration);
if (entity.BaseType != null)
{
IEnumerable<PropertyInfo> baseTypeProperties = GetAllProperties(entity.BaseType as IStructuralTypeConfiguration);
return allProperties.Except(baseTypeProperties, PropertyEqualityComparer.Instance);
}
else
{
return allProperties;
}
}
// Get all properties of this type (that are not already ignored).
public static IEnumerable<PropertyInfo> GetAllProperties(IStructuralTypeConfiguration type)
{
if (type == null)
{
throw Error.ArgumentNull("type");
}
return type
.ClrType
.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
.Where(p => p.IsValidStructuralProperty() && !type.IgnoredProperties.Contains(p))
.ToArray();
}
public static bool IsValidStructuralProperty(this PropertyInfo propertyInfo)
{
if (propertyInfo == null)
{
throw Error.ArgumentNull("propertyInfo");
}
// ignore any indexer properties.
if (propertyInfo.GetIndexParameters().Any())
{
return false;
}
if (propertyInfo.CanRead)
{
// non-public getters are not valid properties
MethodInfo publicGetter = propertyInfo.GetGetMethod();
if (publicGetter != null && propertyInfo.PropertyType.IsValidStructuralPropertyType())
{
return true;
}
}
return false;
}
public static bool IsValidStructuralPropertyType(this Type type)
{
if (type == null)
{
throw Error.ArgumentNull("type");
}
return !(type.IsGenericTypeDefinition
|| type.IsNested
|| type.IsPointer
|| type == typeof(object));
}
public static bool IsCollection(this Type type)
{
return type.IsCollection(out type);
}
public static bool IsCollection(this Type type, out Type elementType)
{
if (type == null)
{
throw Error.ArgumentNull("type");
}
elementType = type;
// see if this type should be ignored.
if (_ignoredCollectionTypes.Contains(type))
{
return false;
}
Type collectionInterface
= type.GetInterfaces()
.Union(new[] { type })
.FirstOrDefault(
t => t.IsGenericType
&& t.GetGenericTypeDefinition() == typeof(IEnumerable<>));
if (collectionInterface != null)
{
elementType = collectionInterface.GetGenericArguments().Single();
return true;
}
return false;
}
// gets the primitive odata uri representation.
public static string GetUriRepresentationForValue(object value)
{
Contract.Assert(value != null);
Contract.Assert(EdmLibHelpers.GetEdmPrimitiveTypeOrNull(value.GetType()) != null);
value = ODataPrimitiveSerializer.ConvertUnsupportedPrimitives(value);
return ODataUriBuilder.GetUriRepresentation(value);
}
private static string GetUriRepresentationForKeyValue(PropertyInfo key, object entityInstance, IEntityTypeConfiguration entityType)
{
Contract.Assert(key != null);
Contract.Assert(entityInstance != null);
Contract.Assert(entityType != null);
object value = key.GetValue(entityInstance, null);
if (value == null)
{
throw Error.InvalidOperation(SRResources.KeyValueCannotBeNull, key.Name, entityType.FullName);
}
return GetUriRepresentationForValue(value);
}
private class PropertyEqualityComparer : IEqualityComparer<PropertyInfo>
{
public static PropertyEqualityComparer Instance = new PropertyEqualityComparer();
public bool Equals(PropertyInfo x, PropertyInfo y)
{
Contract.Assert(x != null);
Contract.Assert(y != null);
return x.Name == y.Name;
}
public int GetHashCode(PropertyInfo obj)
{
Contract.Assert(obj != null);
return obj.Name.GetHashCode();
}
}
}
}
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