public T ReadMetadata <T>()
{
using (var reader = CreateReader())
{
var header = new MetadataHeader(reader); //MetadataHeader self registers to reader
using (var vreader = (DependencyReader)reader.CreateVirtualReader(header.Header.HeaderSize))
{
var mainBlock = header.StructureDefinitions.First(s => s.Type == StructureType.Main).TargetIndex;
vreader.Seek(header.DataBlocks[mainBlock].Offset, SeekOrigin.Begin);
var result = vreader.ReadObject <T>();
var blockProps = typeof(T).GetProperties()
.Where(p => p.PropertyType.IsGenericType && p.PropertyType.GetGenericTypeDefinition() == typeof(BlockCollection <>));
foreach (var prop in blockProps)
{
var collection = prop.GetValue(result) as IBlockCollection;
var offset = OffsetAttribute.ValueFor(prop);
collection.LoadBlocks(mainBlock, offset, vreader);
}
return(result);
}
}
}
public void TestOffsetValueExpression()
{
Assert.AreEqual(0, OffsetAttribute.ValueFor((DataClass01 obj) => obj.Property1));
Assert.AreEqual(10, OffsetAttribute.ValueFor((DataClass01 obj) => obj.Property2, 15));
Assert.AreEqual(15, OffsetAttribute.ValueFor((DataClass01 obj) => obj.Property2, 25));
Assert.AreEqual(20, OffsetAttribute.ValueFor((DataClass01 obj) => obj.Property3, 15));
}
public void TestOffsetValue()
{
var prop1 = typeof(DataClass01).GetProperty(nameof(DataClass01.Property1));
var prop2 = typeof(DataClass01).GetProperty(nameof(DataClass01.Property2));
var prop3 = typeof(DataClass01).GetProperty(nameof(DataClass01.Property3));
Assert.AreEqual(0, OffsetAttribute.ValueFor(prop1));
Assert.AreEqual(10, OffsetAttribute.ValueFor(prop2, 15));
Assert.AreEqual(15, OffsetAttribute.ValueFor(prop2, 25));
Assert.AreEqual(20, OffsetAttribute.ValueFor(prop3, 15));
}
internal void LoadBlocks(int currentBlock, long collectionOffset, DependencyReader reader)
{
if (blockCount == 0)
{
return;
}
var structdef = metadata.StructureDefinitions.First(s => s.FieldBlock == currentBlock && s.FieldOffset == collectionOffset);
if (structdef.TargetIndex < 0)
{
return;
}
var block = metadata.DataBlocks[structdef.TargetIndex];
var blockSize = FixedSizeAttribute.ValueFor(typeof(T));
reader.Seek(block.Offset, SeekOrigin.Begin);
for (int i = 0; i < blockCount; i++)
{
Add(reader.ReadObject <T>());
}
var blockProps = typeof(T).GetProperties()
.Where(p => p.PropertyType.IsGenericType && p.PropertyType.GetGenericTypeDefinition() == typeof(BlockCollection <>));
int index = 0;
foreach (var item in this)
{
var adjustedBase = blockSize * index++;
foreach (var prop in blockProps)
{
var collection = prop.GetValue(item) as IBlockCollection;
var offset = OffsetAttribute.ValueFor(prop);
collection.LoadBlocks(structdef.TargetIndex, adjustedBase + offset, reader);
}
}
}