/// <summary>
/// Private method used by the Set method. This methods sets an attribute
/// to a Sequence Attribute and makes sure it contains enough sequence items.
/// </summary>
/// <param name="tag">The tag of the Attribute.</param>
/// <returns>The already existing or newly created sequence item.</returns>
private Attribute SetSequenceAttribute(Tag tag)
{
Attribute attribute = GetAttribute(tag.AsUInt32);
if (!(attribute is ValidAttribute))
{
attribute = Create(tag.AsUInt32, VR.SQ);
}
else if (attribute.VR != VR.SQ)
{
attribute.Delete();
attribute = Create(tag.AsUInt32, VR.SQ);
}
// At this time, we have made sure that attribute is a Sequence Attribute.
// Now take care that it contains enough Sequence Items.
for (int sequenceIndex = attribute.ItemCount; sequenceIndex < tag.IndexNumber; sequenceIndex++)
{
attribute.AddItem(new SequenceItem());
}
return(attribute);
}
internal virtual void Set <T>(TagSequence tagSequence, VR vR, T genericsParameter)
{
AttributeSet currentAttributeSetInLoop = this;
for (int index = 0; index < tagSequence.Tags.Count; index++)
{
Tag tag = tagSequence[index];
if (index < tagSequence.Tags.Count - 1)
// If this is not the last tag from the TagSequence...
{
Attribute attribute = currentAttributeSetInLoop.SetSequenceAttribute(tag);
currentAttributeSetInLoop = attribute.GetItem(tag.IndexNumber);
}
else
// If this is the last tag from the TagSequence...
{
Attribute attribute = currentAttributeSetInLoop.GetAttribute(tag.AsUInt32);
if (attribute is ValidAttribute)
{
attribute.Delete();
}
attribute = currentAttributeSetInLoop.Create(tag.AsUInt32, vR);
// The type of genericsParameter (generics type) is determined run-time.
// Maybe this is the reason for a direct call to attribute.Values.Add
// (has a overloaded method with params parameter) with the argument
// genericsParameter not to work. Needed to explicitly cast to a specfic type
// before calling the Add method.
if (genericsParameter is Values)
{
Values values = genericsParameter as Values;
attribute.Values.Add(values);
}
else if (genericsParameter is Byte[])
{
Byte[] value = genericsParameter as Byte[];
attribute.Values.Set(value);
}
else if (genericsParameter is Object[])
{
Object[] values = genericsParameter as Object[];
attribute.Values.Add(values);
}
else
{
throw new HliException("Not supposed to get here.");
}
}
}
}