/// <summary>
/// Serializes a property.
/// </summary>
/// <param name="context">The serialization context to use.</param>
/// <param name="tagStream">The stream to write completed blocks of tag data to.</param>
/// <param name="block">The temporary block to write incomplete tag data to.</param>
/// <param name="instance">The object that the property belongs to.</param>
/// <param name="structInfo">The structure information.</param>
/// <param name="property">The property.</param>
/// <param name="baseOffset">The base offset of the structure from the start of its block.</param>
/// <exception cref="System.InvalidOperationException">Offset for property \ + property.Name + \ is outside of its structure</exception>
private static void SerializeProperty(ISerializationContext context, MemoryStream tagStream, IDataBlock block, object instance, TagStructureAttribute structInfo, PropertyInfo property, long baseOffset)
{
// Get the property's TagValueAttribute
var valueInfo = property.GetCustomAttributes(typeof(TagElementAttribute), false).FirstOrDefault() as TagElementAttribute;
if (valueInfo == null)
{
return; // Ignore the property
}
if (valueInfo.Offset >= structInfo.Size)
{
throw new InvalidOperationException("Offset for property \"" + property.Name + "\" is outside of its structure");
}
// Seek to the value if it has an offset specified and write it
if (valueInfo.Offset >= 0)
{
block.Stream.Position = baseOffset + valueInfo.Offset;
}
var startOffset = block.Stream.Position;
var val = property.GetValue(instance);
SerializeValue(context, tagStream, block, val, valueInfo, property.PropertyType);
if (valueInfo.Size > 0)
{
block.Stream.Position = startOffset + valueInfo.Size;
}
}
/// <summary>
/// Deserializes a property of a structure.
/// </summary>
/// <param name="reader">The reader.</param>
/// <param name="context">The serialization context to use.</param>
/// <param name="instance">The instance to store the property to.</param>
/// <param name="structInfo">The structure information.</param>
/// <param name="property">The property.</param>
/// <param name="baseOffset">The offset of the start of the structure.</param>
/// <exception cref="System.InvalidOperationException">Offset for property is outside of its structure</exception>
private static void DeserializeProperty(BinaryReader reader, ISerializationContext context, object instance, TagStructureAttribute structInfo, PropertyInfo property, long baseOffset)
{
// Get the property's TagValueAttribute
var valueInfo = property.GetCustomAttributes(typeof(TagElementAttribute), false).FirstOrDefault() as TagElementAttribute;
if (valueInfo == null)
{
return; // Ignore the property
}
if (valueInfo.Offset >= structInfo.Size)
{
throw new InvalidOperationException("Offset for property \"" + property.Name + "\" is outside of its structure");
}
// Seek to the value if it has an offset specified and then read it
if (valueInfo.Offset >= 0)
{
reader.BaseStream.Position = baseOffset + valueInfo.Offset;
}
var startOffset = reader.BaseStream.Position;
property.SetValue(instance, DeserializeValue(reader, context, valueInfo, property.PropertyType));
if (valueInfo.Size > 0)
{
reader.BaseStream.Position = startOffset + valueInfo.Size; // Honor the value's size if it has one set
}
}
