//============================================================
// STATIC METHODS
//============================================================
#region ExpressionAsString(YahooMediaExpression expression)
/// <summary>
/// Returns the content expression identifier for the supplied <see cref="YahooMediaExpression"/>.
/// </summary>
/// <param name="expression">The <see cref="YahooMediaExpression"/> to get the content expression identifier for.</param>
/// <returns>The content expression identifier for the supplied <paramref name="expression"/>, otherwise returns an empty string.</returns>
public static string ExpressionAsString(YahooMediaExpression expression)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
string name = String.Empty;
//------------------------------------------------------------
// Return alternate value based on supplied protocol
//------------------------------------------------------------
foreach (System.Reflection.FieldInfo fieldInfo in typeof(YahooMediaExpression).GetFields())
{
if (fieldInfo.FieldType == typeof(YahooMediaExpression))
{
YahooMediaExpression mediaExpression = (YahooMediaExpression)Enum.Parse(fieldInfo.FieldType, fieldInfo.Name);
if (mediaExpression == expression)
{
object[] customAttributes = fieldInfo.GetCustomAttributes(typeof(EnumerationMetadataAttribute), false);
if (customAttributes != null && customAttributes.Length > 0)
{
EnumerationMetadataAttribute enumerationMetadata = customAttributes[0] as EnumerationMetadataAttribute;
name = enumerationMetadata.AlternateValue;
break;
}
}
}
}
return(name);
}
/// <summary>
/// Returns the <see cref="YahooMediaExpression"/> enumeration value that corresponds to the specified content expression name.
/// </summary>
/// <param name="name">The name of the content expression.</param>
/// <returns>A <see cref="YahooMediaExpression"/> enumeration value that corresponds to the specified string, otherwise returns <b>YahooMediaExpression.None</b>.</returns>
/// <remarks>This method disregards case of specified content expression name.</remarks>
/// <exception cref="ArgumentNullException">The <paramref name="name"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="name"/> is an empty string.</exception>
public static YahooMediaExpression ExpressionByName(string name)
{
YahooMediaExpression mediaExpression = YahooMediaExpression.None;
Guard.ArgumentNotNullOrEmptyString(name, "name");
foreach (System.Reflection.FieldInfo fieldInfo in typeof(YahooMediaExpression).GetFields())
{
if (fieldInfo.FieldType == typeof(YahooMediaExpression))
{
YahooMediaExpression expression = (YahooMediaExpression)Enum.Parse(fieldInfo.FieldType, fieldInfo.Name);
object[] customAttributes = fieldInfo.GetCustomAttributes(typeof(EnumerationMetadataAttribute), false);
if (customAttributes != null && customAttributes.Length > 0)
{
EnumerationMetadataAttribute enumerationMetadata = customAttributes[0] as EnumerationMetadataAttribute;
if (String.Compare(name, enumerationMetadata.AlternateValue, StringComparison.OrdinalIgnoreCase) == 0)
{
mediaExpression = expression;
break;
}
}
}
}
return(mediaExpression);
}
/// <summary>
/// Returns the content expression identifier for the supplied <see cref="YahooMediaExpression"/>.
/// </summary>
/// <param name="expression">The <see cref="YahooMediaExpression"/> to get the content expression identifier for.</param>
/// <returns>The content expression identifier for the supplied <paramref name="expression"/>, otherwise returns an empty string.</returns>
public static string ExpressionAsString(YahooMediaExpression expression)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
string name = String.Empty;
//------------------------------------------------------------
// Return alternate value based on supplied protocol
//------------------------------------------------------------
foreach (System.Reflection.FieldInfo fieldInfo in typeof(YahooMediaExpression).GetFields())
{
if (fieldInfo.FieldType == typeof(YahooMediaExpression))
{
YahooMediaExpression mediaExpression = (YahooMediaExpression)Enum.Parse(fieldInfo.FieldType, fieldInfo.Name);
if (mediaExpression == expression)
{
object[] customAttributes = fieldInfo.GetCustomAttributes(typeof(EnumerationMetadataAttribute), false);
if (customAttributes != null && customAttributes.Length > 0)
{
EnumerationMetadataAttribute enumerationMetadata = customAttributes[0] as EnumerationMetadataAttribute;
name = enumerationMetadata.AlternateValue;
break;
}
}
}
}
return name;
}
/// <summary>
/// Loads the primary properties of this <see cref="YahooMediaContent"/> using the supplied <see cref="XPathNavigator"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <returns><b>true</b> if the <see cref="YahooMediaContent"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="YahooMediaContent"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception>
private bool LoadPrimary(XPathNavigator source)
{
bool wasLoaded = false;
Guard.ArgumentNotNull(source, "source");
if (source.HasAttributes)
{
string urlAttribute = source.GetAttribute("url", String.Empty);
string fileSizeAttribute = source.GetAttribute("fileSize", String.Empty);
string typeAttribute = source.GetAttribute("type", String.Empty);
string mediumAttribute = source.GetAttribute("medium", String.Empty);
string isDefaultAttribute = source.GetAttribute("isDefault", String.Empty);
string expressionAttribute = source.GetAttribute("expression", String.Empty);
string bitrateAttribute = source.GetAttribute("bitrate", String.Empty);
if (!String.IsNullOrEmpty(urlAttribute))
{
Uri url;
if (Uri.TryCreate(urlAttribute, UriKind.RelativeOrAbsolute, out url))
{
this.Url = url;
wasLoaded = true;
}
}
if (!String.IsNullOrEmpty(fileSizeAttribute))
{
long fileSize;
if (Int64.TryParse(fileSizeAttribute, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out fileSize))
{
this.FileSize = fileSize;
wasLoaded = true;
}
}
if (!String.IsNullOrEmpty(typeAttribute))
{
this.ContentType = typeAttribute;
wasLoaded = true;
}
if (!String.IsNullOrEmpty(mediumAttribute))
{
YahooMediaMedium medium = YahooMediaSyndicationExtension.MediumByName(mediumAttribute);
if (medium != YahooMediaMedium.None)
{
this.Medium = medium;
wasLoaded = true;
}
}
if (!String.IsNullOrEmpty(isDefaultAttribute))
{
if (String.Compare(isDefaultAttribute, "true", StringComparison.OrdinalIgnoreCase) == 0)
{
this.IsDefault = true;
wasLoaded = true;
}
else if (String.Compare(isDefaultAttribute, "false", StringComparison.OrdinalIgnoreCase) == 0)
{
this.IsDefault = false;
wasLoaded = true;
}
}
if (!String.IsNullOrEmpty(expressionAttribute))
{
YahooMediaExpression expression = YahooMediaSyndicationExtension.ExpressionByName(expressionAttribute);
if (expression != YahooMediaExpression.None)
{
this.Expression = expression;
wasLoaded = true;
}
}
if (!String.IsNullOrEmpty(bitrateAttribute))
{
int bitrate;
if (Int32.TryParse(bitrateAttribute, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out bitrate))
{
this.Bitrate = bitrate;
wasLoaded = true;
}
}
}
return(wasLoaded);
}
