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>
/// 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]);
}
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);
}
