public T this[int index]
{
get
{
DebugHelper.AssertUIThread();
Debug.Assert(this.valueArray != null);
return(this.valueArray[index]);
}
set
{
DebugHelper.AssertUIThread();
Debug.Assert(this.keyValue != null);
Debug.Assert(this.valueArray != null);
if (!value.Equals(this.valueArray[index]))
{
this.valueArray[index] = value;
MetadataKeyValuePair keyValue = this.keyValue;
T[] valueArray = this.valueArray;
Dispatcher.CurrentDispatcher.BeginInvoke(new Action(() =>
{
keyValue.Value = valueArray;
}));
}
}
}
public void WriteToBuffer(Type structType, object value)
{
DebugHelper.AssertUIThread();
if (structType != null)
{
MetadataKeyValuePair keyValue = this.KeyValue;
byte[] valueArray = this.GetValueArray();
Debug.Assert(keyValue != null);
Debug.Assert(valueArray != null);
if (Marshal.SizeOf(structType) > valueArray.Length)
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Struct '{0}' is bigger than the binary metadata for key '{1}'.", structType.FullName, keyValue.Key));
}
unsafe
{
fixed(byte *pFoo = valueArray)
{
IntPtr ptr = new IntPtr(pFoo);
Marshal.StructureToPtr(value, ptr, true);
}
}
Dispatcher.CurrentDispatcher.BeginInvoke(new Action(() =>
{
keyValue.Value = valueArray;
}));
}
}
public MetadataArrayProxy(MetadataKeyValuePair keyValue, ReadOnlyCollection <T> data)
{
if (keyValue == null)
{
throw new ArgumentNullException("keyValue");
}
if (data == null)
{
throw new ArgumentNullException("data");
}
this.keyValue = keyValue;
this.valueArray = new T[data.Count];
data.CopyTo(this.valueArray, 0);
}
public object ReadFromBuffer(Type structType)
{
DebugHelper.AssertUIThread();
object value = null;
if (structType != null)
{
if ((this.cachedStruct != null) && (this.cachedStruct.GetType() == structType))
{
value = this.cachedStruct;
}
else
{
MetadataKeyValuePair keyValue = this.KeyValue;
byte[] valueArray = this.GetValueArray();
Debug.Assert(keyValue != null);
Debug.Assert(valueArray != null);
if (Marshal.SizeOf(structType) > valueArray.Length)
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Struct '{0}' is bigger than the binary metadata for key '{1}'.", structType.FullName, keyValue.Key));
}
unsafe
{
fixed(byte *pValue = valueArray)
{
IntPtr ptr = new IntPtr(pValue);
value = Marshal.PtrToStructure(ptr, structType);
this.cachedStruct = value;
}
}
}
}
return(value);
}
public void SetBuffer(int bufferSize, IntPtr buffer, int startIndex)
{
if (bufferSize > 0)
{
if (buffer == IntPtr.Zero)
{
throw new ArgumentNullException("buffer");
}
MetadataKeyValuePair keyValue = this.KeyValue;
byte[] valueArray = this.GetValueArray();
Debug.Assert(keyValue != null);
Debug.Assert(valueArray != null);
Marshal.Copy(buffer, valueArray, startIndex, bufferSize);
Dispatcher.CurrentDispatcher.BeginInvoke(new Action(() =>
{
keyValue.Value = valueArray;
}));
}
}
public BinaryMetadataProxy(MetadataKeyValuePair keyValue, ReadOnlyCollection <byte> data) :
base(keyValue, data)
{
DebugHelper.AssertUIThread();
}