/// <summary>
/// <para>
/// This method merges the standard metadata properties of a referring item
/// and the metadat properties of an underlying item.
/// </para>
/// </summary>
/// <param name="baseProps">metadata properties of this/referring item</param>
/// <param name="refProps">metadata properties of the underlying/referred item</param>
/// <returns></returns>
private MediaProperties MergeProperties(IMediaProperties baseProps, IMediaProperties refProps)
{
MediaProperties mergedProps = new MediaProperties();
ICollection basePropNames = baseProps.PropertyNames;
ICollection refPropNames = refProps.PropertyNames;
// The referring item's metadata is always appended to the
// underlying item's metadata.
//
foreach (string basePropName in basePropNames)
{
ArrayList al = this.GetMergedValues(basePropName, mergedProps, baseProps);
mergedProps[basePropName] = al;
}
foreach (string refPropName in refPropNames)
{
ArrayList al = this.GetMergedValues(refPropName, mergedProps, refProps);
mergedProps[refPropName] = al;
}
return(mergedProps);
}
/// <summary>
/// Method executes when m_Properties.OnMetadataChanged fires.
/// </summary>
/// <param name="sender"></param>
/// <param name="stateNumber"></param>
protected override void Sink_OnMediaPropertiesChanged(MediaProperties sender, int stateNumber)
{
base.UpdateCache();
this.NotifyRootOfChange();
}
/// <summary>
/// Special ISerializable constructor.
/// Do basic initialization and then serialize from the info object.
/// </summary>
/// <param name="info"></param>
/// <param name="context"></param>
protected MediaObject(SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
{
System.Threading.Interlocked.Increment(ref ObjectCounter);
//OpenSource.Utilities.InstanceTracker.Add(this);
Init();
this.m_bools = (BitArray) info.GetValue("m_bools", typeof(BitArray));
this.m_Desc = (ArrayList) info.GetValue("m_Desc", typeof(ArrayList));
this.m_ID = info.GetString("m_ID");
this.m_Properties = (MediaProperties) info.GetValue("m_Properties", typeof(MediaProperties));
this.m_Resources = (ArrayList) info.GetValue("m_Resources", typeof(ArrayList));
this._Tag = info.GetValue("_Tag", typeof(object));
}
/// <summary>
/// Completely clears the media object of its
/// reources and properties.
/// </summary>
private void ResetProperties()
{
if (this.m_Properties != null)
{
this.m_Properties.ClearProperties();
}
else
{
this.m_Properties = new MediaProperties();
this.m_Properties.OnMetadataChanged += new MediaProperties.Delegate_OnMetadataChanged(this.Sink_OnMediaPropertiesChanged);
}
try
{
//this.m_LockDesc.AcquireWriterLock(-1);
this.m_Properties.RWLock.AcquireWriterLock(-1);
this.m_Desc = null;
}
finally
{
//this.m_LockDesc.ReleaseWriterLock();
this.m_Properties.RWLock.ReleaseWriterLock();
}
}
/// <summary>
/// Method executes when m_Properties.OnMetadataChanged fires.
/// </summary>
/// <param name="sender"></param>
/// <param name="stateNumber"></param>
protected virtual void Sink_OnMediaPropertiesChanged(MediaProperties sender, int stateNumber)
{
this.UpdateCache();
}
/// <summary>
/// <para>
/// This method merges the standard metadata properties of a referring item
/// and the metadat properties of an underlying item.
/// </para>
/// </summary>
/// <param name="baseProps">metadata properties of this/referring item</param>
/// <param name="refProps">metadata properties of the underlying/referred item</param>
/// <returns></returns>
private MediaProperties MergeProperties(IMediaProperties baseProps, IMediaProperties refProps)
{
MediaProperties mergedProps = new MediaProperties();
ICollection basePropNames = baseProps.PropertyNames;
ICollection refPropNames = refProps.PropertyNames;
// The referring item's metadata is always appended to the
// underlying item's metadata.
//
foreach (string basePropName in basePropNames)
{
ArrayList al = this.GetMergedValues(basePropName, mergedProps, baseProps);
mergedProps[basePropName] = al;
}
foreach (string refPropName in refPropNames)
{
ArrayList al = this.GetMergedValues(refPropName, mergedProps, refProps);
mergedProps[refPropName] = al;
}
return mergedProps;
}
