protected virtual void Populate(Enum schema)
{
this.schema = schema;
if (schema == null)
{
// reset reflective properties to defaults
this.Category = XmpCategory.External;
this.Description = null;
this.Name = null;
this.Namespace = null;
this.Quantity = XmpQuantity.Single;
this.ValueType = XmpBasicType.Unknown;
return;
}
string name;
FieldInfo fieldInfo;
Type type = AttributeUtility.GetEnumInfo(schema, out name, out fieldInfo);
// check for property info on property enum only
XmpPropertyAttribute xp = AttributeUtility
.FindAttributes <XmpPropertyAttribute>(fieldInfo)
.FirstOrDefault();
if (xp == null)
{
this.Category = XmpCategory.External;
this.Name = name;
this.Quantity = XmpQuantity.Single;
this.ValueType = XmpBasicType.Unknown;
}
else
{
this.Category = xp.Category;
this.Name = String.IsNullOrEmpty(xp.Name) ? name : xp.Name;
this.Quantity = xp.Quantity;
this.ValueType = xp.ValueType;
}
// check for namespace on property enum, then on type
XmpNamespaceAttribute xns = AttributeUtility
.FindAttributes <XmpNamespaceAttribute>(fieldInfo, type)
.FirstOrDefault() ?? XmpNamespaceAttribute.Empty;
this.Namespace = xns.Namespace;
this.Prefix = xns.PreferredPrefix;
// check for description on property enum only
this.Description = AttributeUtility
.FindAttributes <DescriptionAttribute>(fieldInfo)
.Select(d => d.Description)
.FirstOrDefault();
string valueTypeName;
FieldInfo valueTypeInfo;
AttributeUtility.GetEnumInfo(this.ValueType, out valueTypeName, out valueTypeInfo);
}
private IEnumerable <string> GetQueryForSchema(Enum schema)
{
if (schema is ExifSchema)
{
yield return("/app1/{ushort=0}/exif/{ushort=" + schema.ToString("D") + "}");
yield return("/app1/ifd/exif/{ushort=" + schema.ToString("D") + "}");
}
else if (schema is ExifTiffSchema)
{
yield return("/app1/{ushort=0}/{ushort=" + schema.ToString("D") + "}");
yield return("/app1/ifd/{ushort=" + schema.ToString("D") + "}");
}
string name;
FieldInfo fieldInfo;
Type type = AttributeUtility.GetEnumInfo(schema, out name, out fieldInfo);
// check for namespace on property enum, then on type
XmpNamespaceAttribute xns = AttributeUtility
.FindAttributes <XmpNamespaceAttribute>(fieldInfo, type)
.FirstOrDefault() ?? XmpNamespaceAttribute.Empty;
// check for property info on property enum only
XmpPropertyAttribute xp = AttributeUtility
.FindAttributes <XmpPropertyAttribute>(fieldInfo)
.FirstOrDefault();
if (xp != null && !String.IsNullOrEmpty(xp.Name))
{
name = xp.Name;
}
if (xns == null || !xns.Prefixes.Any())
{
yield return("/xmp/" + name);
}
else
{
foreach (string prefix in xns.Prefixes)
{
yield return("/xmp/" + prefix + ':' + name);
}
}
}
private Enum Parse(string scope, string localName, IDictionary <string, Type> lookup)
{
if (String.IsNullOrEmpty(scope))
{
return(null);
}
scope = scope.Replace("\\", "");
Type enumType;
if (!lookup.TryGetValue(scope, out enumType))
{
return(null);
}
try
{
return((Enum)Enum.Parse(enumType, localName, true));
}
catch
{
foreach (object value in Enum.GetValues(enumType))
{
string name = Enum.GetName(enumType, value);
FieldInfo fieldInfo = enumType.GetField(name);
// check for property info on property enum only
XmpPropertyAttribute xp = AttributeUtility
.FindAttributes <XmpPropertyAttribute>(fieldInfo)
.FirstOrDefault();
if (xp != null && StringComparer.OrdinalIgnoreCase.Equals(xp.Name, localName))
{
return((Enum)fieldInfo.GetValue(enumType));
}
}
return(null);
}
}
