internal static bool IsUnboundedFacetValue(Facet facet)
{
// TODO: vamshikb
// Use return object.ReferenceEquals(facet.Value, EdmConstants.UnboundedValue);
// when EdmConstants.UnboundedValue is made public.
return (null == facet.Value || facet.IsUnbounded);
}
public static void VerifyFacetsEquivalent(LegacyMetadata.Facet legacyFacet, Facet facet)
{
Assert.Equal(legacyFacet.Name, facet.Name);
Assert.Equal(legacyFacet.FacetType.FullName, facet.FacetType.FullName);
// Specialcase Variable, Max and Identity facet values - they are internal singleton objects.
if (legacyFacet.Value != null &&
(new[] { "Max", "Variable", "Identity" }.Contains(legacyFacet.Value.ToString()) ||
facet.Name == "ConcurrencyMode"))
{
// this is to make sure we did not stick EF6 Max/Variable/Identity on legacy facet as the value
Assert.Equal(typeof(LegacyMetadata.EdmType).Assembly, legacyFacet.Value.GetType().Assembly);
Assert.NotNull(facet.Value);
Assert.Equal(legacyFacet.Value.ToString(), facet.Value.ToString());
}
else
{
Assert.Equal(legacyFacet.Value, facet.Value);
}
Assert.Equal(legacyFacet.IsUnbounded, facet.IsUnbounded);
Assert.Equal(LegacyMetadata.BuiltInTypeKind.Facet, legacyFacet.BuiltInTypeKind);
Assert.Equal(BuiltInTypeKind.Facet, facet.BuiltInTypeKind);
}
internal bool TryGetFacet(FacetDescription description, out Facet facet)
{
if (description.FacetName
== DbProviderManifest.NullableFacetName)
{
if (_nullable.HasValue)
{
facet = Facet.Create(description, _nullable.GetValueAsObject());
return true;
}
}
else if (description.FacetName
== DbProviderManifest.MaxLengthFacetName)
{
if (_maxLength.HasValue)
{
facet = Facet.Create(description, _maxLength.GetValueAsObject());
return true;
}
}
else if (description.FacetName
== DbProviderManifest.UnicodeFacetName)
{
if (_unicode.HasValue)
{
facet = Facet.Create(description, _unicode.GetValueAsObject());
return true;
}
}
else if (description.FacetName
== DbProviderManifest.FixedLengthFacetName)
{
if (_fixedLength.HasValue)
{
facet = Facet.Create(description, _fixedLength.GetValueAsObject());
return true;
}
}
else if (description.FacetName
== DbProviderManifest.PrecisionFacetName)
{
if (_precision.HasValue)
{
facet = Facet.Create(description, _precision.GetValueAsObject());
return true;
}
}
else if (description.FacetName
== DbProviderManifest.ScaleFacetName)
{
if (_scale.HasValue)
{
facet = Facet.Create(description, _scale.GetValueAsObject());
return true;
}
}
facet = null;
return false;
}
/// <summary>
/// Creates a Facet instance with the specified value for the given
/// facet description.
/// </summary>
/// <param name="facetDescription">The object describing this facet</param>
/// <param name="value">The value of the facet</param>
/// <param name="bypassKnownValues">true to bypass caching and known values; false otherwise.</param>
/// <exception cref="System.ArgumentNullException">Thrown if facetDescription argument is null</exception>
internal static Facet Create(FacetDescription facetDescription, object value, bool bypassKnownValues)
{
//Contract.Requires(facetDescription != null);
if (!bypassKnownValues)
{
// Reuse facets with a null value.
if (ReferenceEquals(value, null))
{
return facetDescription.NullValueFacet;
}
// Reuse facets with a default value.
if (Equals(facetDescription.DefaultValue, value))
{
return facetDescription.DefaultValueFacet;
}
// Special case boolean facets.
if (facetDescription.FacetType.Identity == "Edm.Boolean")
{
var boolValue = (bool)value;
return facetDescription.GetBooleanFacet(boolValue);
}
}
var result = new Facet(facetDescription, value);
// Check the type of the value only if we know what the correct CLR type is
if (value != null && !Helper.IsUnboundedFacetValue(result) && !Helper.IsVariableFacetValue(result)
&& result.FacetType.ClrType != null)
{
var valueType = value.GetType();
Debug.Assert(
valueType == result.FacetType.ClrType
|| result.FacetType.ClrType.IsAssignableFrom(valueType),
string.Format(
CultureInfo.CurrentCulture, "The facet {0} has type {1}, but a value of type {2} was supplied.", result.Name,
result.FacetType.ClrType, valueType)
);
}
return result;
}
/// <summary>
/// Gets a cached facet instance with the specified boolean value.
/// </summary>
/// <param name="value">Value for the Facet result.</param>
/// <returns>A cached facet instance with the specified boolean value.</returns>
internal Facet GetBooleanFacet(bool value)
{
System.Diagnostics.Debug.Assert(this.FacetType.Identity == "Edm.Boolean");
if (_valueCache == null)
{
Facet[] valueCache = new Facet[2];
valueCache[0] = Facet.Create(this, true, true);
valueCache[1] = Facet.Create(this, false, true);
System.Threading.Interlocked.CompareExchange(
ref _valueCache,
valueCache,
null
);
}
return (value) ? _valueCache[0] : _valueCache[1];
}
/// <summary>
/// Gets a cached facet instance with the specified boolean value.
/// </summary>
/// <param name="value">Value for the Facet result.</param>
/// <returns>A cached facet instance with the specified boolean value.</returns>
internal Facet GetBooleanFacet(bool value)
{
Debug.Assert(FacetType.Identity == "Edm.Boolean");
if (_valueCache == null)
{
var valueCache = new Facet[2];
valueCache[0] = Facet.Create(this, true, true);
valueCache[1] = Facet.Create(this, false, true);
Interlocked.CompareExchange(
ref _valueCache,
valueCache,
null
);
}
return (value) ? _valueCache[0] : _valueCache[1];
}
private static Facet[] CreateInitialFacets(FacetDescription[] facetDescriptions)
{
Debug.Assert(facetDescriptions != null && facetDescriptions.Length > 0);
Facet[] facets = new Facet[facetDescriptions.Length];
for (int i = 0; i < facetDescriptions.Length; ++i)
{
switch (facetDescriptions[i].FacetName)
{
case DbProviderManifest.MaxLengthFacetName:
facets[i] = Facet.Create(facetDescriptions[i], TypeUsage.DefaultMaxLengthFacetValue);
break;
case DbProviderManifest.UnicodeFacetName:
facets[i] = Facet.Create(facetDescriptions[i], TypeUsage.DefaultUnicodeFacetValue);
break;
case DbProviderManifest.FixedLengthFacetName:
facets[i] = Facet.Create(facetDescriptions[i], TypeUsage.DefaultFixedLengthFacetValue);
break;
case DbProviderManifest.PrecisionFacetName:
facets[i] = Facet.Create(facetDescriptions[i], TypeUsage.DefaultPrecisionFacetValue);
break;
case DbProviderManifest.ScaleFacetName:
facets[i] = Facet.Create(facetDescriptions[i], TypeUsage.DefaultScaleFacetValue);
break;
default:
Debug.Assert(false, "Unexpected facet");
break;
}
}
return facets;
}
protected override void Visit(Facet facet)
{
int index;
if (facet.Name != DbProviderManifest.NullableFacetName)
{
// skip all the non interesting facets
return;
}
if (!this.AddObjectToSeenListAndHashBuilder(facet, out index))
{
return;
}
this.AddObjectStartDumpToHashBuilder(facet, index);
#region Inner data visit
this.AddObjectContentToHashBuilder(facet.Identity);
// Identity already contains Name
this.AddObjectContentToHashBuilder(facet.Value);
base.Visit(facet);
#endregion
this.AddObjectEndDumpToHashBuilder();
}
protected virtual void Visit(Facet facet)
{
Visit(facet.FacetType);
}