private IEnumerable <XmpProperty> AggregateProperties(IEnumerable value)
{
if (value == null)
{
yield break;
}
if (value is IDictionary <string, object> )
{
// unwrap generic container
value = ((IDictionary <string, object>)value).Values;
}
// filter out any values which are not enumerable
foreach (IEnumerable item in value.OfType <IEnumerable>())
{
// each item is either a list of properties or a sequence holding a list of properties
IEnumerable <XmpProperty> properties =
(item is IEnumerable <XmpProperty>) ?
(IEnumerable <XmpProperty>)item :
this.AggregateProperties(item);
// aggregate into single sequence
foreach (XmpProperty property in properties)
{
yield return(XmpPropertyCollection.ProcessValue(property));
}
}
}
/// <summary>
/// Loads XmpProperties from XML
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
public static XmpPropertyCollection LoadFromXml(string filename)
{
using (TextReader reader = File.OpenText(filename))
{
return(XmpPropertyCollection.LoadFromXml(reader));
}
}
private IEnumerable <XmpProperty> ExtractSchemas(BitmapMetadata metadata, IEnumerable <Enum> schemas)
{
foreach (Enum schema in schemas)
{
string name = null;
object value = null;
foreach (string query in this.GetQueryForSchema(schema))
{
if (String.IsNullOrEmpty(query))
{
continue;
}
value = metadata.GetQuery(query);
if (value == null)
{
continue;
}
name = query;
break;
}
if (String.IsNullOrEmpty(name))
{
continue;
}
name = name.Substring(name.LastIndexOf('/') + 1);
#if DIAGNOSTICS
Console.WriteLine("{0} => {1}: {2}", name, value != null ? value.GetType().Name : "null", Convert.ToString(value));
#endif
if (value is BitmapMetadata)
{
value = this.ProcessMetadata((BitmapMetadata)value, '/' + name, 0);
}
else if (value is BitmapMetadataBlob)
{
value = ((BitmapMetadataBlob)value).GetBlobValue();
}
if (value == null)
{
continue;
}
yield return(XmpPropertyCollection.ProcessValue(new XmpProperty
{
Schema = schema,
Value = value
}));
}
}
public static XmpPropertyCollection LoadFromImage(string filename, params Enum[] schemas)
{
return(XmpPropertyCollection.LoadFromImage(filename, (IEnumerable <Enum>)schemas));
}
public static XmpPropertyCollection LoadFromImage(Stream stream, params Enum[] schemas)
{
return(XmpPropertyCollection.LoadFromImage(stream, (IEnumerable <Enum>)schemas));
}
internal static XmpProperty ProcessValue(XmpProperty property)
{
if (property.ValueType is XmpBasicType)
{
switch ((XmpBasicType)property.ValueType)
{
case XmpBasicType.Boolean:
{
bool value;
if (Boolean.TryParse(Convert.ToString(property.Value), out value))
{
property.Value = value;
}
break;
}
case XmpBasicType.Date:
{
DateTime value;
if (DateTime.TryParse(Convert.ToString(property.Value), out value))
{
property.Value = value;
}
break;
}
case XmpBasicType.Integer:
{
int value;
if (Int32.TryParse(Convert.ToString(property.Value), out value))
{
property.Value = value;
}
break;
}
case XmpBasicType.Real:
{
decimal value;
if (Decimal.TryParse(Convert.ToString(property.Value), out value))
{
property.Value = value;
}
break;
}
}
}
else if (property.ValueType is ExifType)
{
switch ((ExifType)property.ValueType)
{
case ExifType.GpsCoordinate:
{
GpsCoordinate gps;
if (GpsCoordinate.TryParse(Convert.ToString(property.Value), out gps))
{
property.Value = gps;
}
break;
}
case ExifType.Rational:
{
// TODO: how best to determine type of Rational<T>
XmpPropertyCollection.ProcessRational <long>(property);
break;
}
}
}
return(property);
}
private XmpProperty GetProperty(XmpProperty property, XElement elem)
{
switch (property.Quantity)
{
case XmpQuantity.Alt:
{
elem = elem.Element(XName.Get(property.Quantity.ToString(), RdfNamespace));
if (elem != null)
{
if (elem.Elements().Count() == 0)
{
property.Value = elem.Value;
}
else
{
if (property.ValueType is XmpBasicType &&
((XmpBasicType)property.ValueType) == XmpBasicType.LangAlt)
{
// convert to dictionary
property.Value = elem.Elements().ToDictionary(
n => n.Attribute(XNamespace.Xml + "lang").Value,
n => (object)n.Value);
}
else
{
// TODO: find how best to process non-lang alts
// convert to array
property.Value = elem.Elements(XName.Get("li", RdfNamespace)).Select(n => n.Value).ToList();
}
}
}
break;
}
case XmpQuantity.Bag:
case XmpQuantity.Seq:
{
elem = elem.Element(XName.Get(property.Quantity.ToString(), RdfNamespace));
if (elem != null)
{
if (elem.Elements().Count() == 0)
{
property.Value = elem.Value;
}
else
{
// convert to array
property.Value = elem.Elements(XName.Get("li", RdfNamespace)).Select(n => n.Value).ToList();
}
}
break;
}
default:
{
if (elem.Elements().Count() == 0)
{
property.Value = elem.Value;
}
else
{
// convert to dictionary
property.Value = elem.Elements().ToDictionary(
n => n.Name.LocalName,
n => (object)n.Value);
}
break;
}
}
return(XmpPropertyCollection.ProcessValue(property));
}
