/// <summary>Initializes the metadata item.</summary>
/// <param name="name">The name of the attribute.</param>
/// <param name="value">The value of the attribute.</param>
/// <param name="type">The type of the attribute value.</param>
public MetadataItem(string name, object value, StreamBufferAttrDataType type)
{
Name = name;
Value = value;
Type = type;
}
/// <summary>Initializes the metadata item.</summary>
/// <param name="name">The name of the attribute.</param>
/// <param name="value">The value of the attribute.</param>
/// <param name="type">The type of the attribute value.</param>
public MetadataItem(string name, object value, StreamBufferAttrDataType type)
{
Name = name;
Value = value;
Type = type;
}
private static RecordingAttribute getAttribute(StringBuilder name, StreamBufferAttrDataType attributeType, byte[] attributeValue)
{
string attributeName = name.ToString().TrimEnd('\0');
string type = attributeType.ToString();
switch (attributeType)
{
case StreamBufferAttrDataType.Binary:
RecordingAttribute binaryAttribute = new RecordingAttribute(attributeName, type, attributeValue);
return (binaryAttribute);
case StreamBufferAttrDataType.Bool:
RecordingAttribute boolAttribute = new RecordingAttribute(attributeName, type, attributeValue[0] == 0);
return (boolAttribute);
case StreamBufferAttrDataType.DWord:
int intValue = attributeValue[0] << 24 | attributeValue[1] << 16 | attributeValue[2] << 8 | attributeValue[3];
RecordingAttribute intAttribute = new RecordingAttribute(attributeName, type, intValue);
return (intAttribute);
case StreamBufferAttrDataType.Guid:
RecordingAttribute guidAttribute = new RecordingAttribute(attributeName, type, new Guid(attributeValue));
return (guidAttribute);
case StreamBufferAttrDataType.QWord:
long longValue = attributeValue[0] << 56 | attributeValue[1] << 48 | attributeValue[2] << 40
| attributeValue[3] << 32 | attributeValue[4] << 24 | attributeValue[5] << 16
| attributeValue[6] << 8 | attributeValue[7];
RecordingAttribute longAttribute = new RecordingAttribute(attributeName, type, longValue);
return (longAttribute);
case StreamBufferAttrDataType.String:
Encoding sourceEncoding = Encoding.GetEncoding("utf-16");
if (sourceEncoding == null)
return (null);
string encodedString = sourceEncoding.GetString(attributeValue, 0, attributeValue.Length);
RecordingAttribute stringAttribute = new RecordingAttribute(attributeName, type, encodedString);
return (stringAttribute);
case StreamBufferAttrDataType.Word:
int shortValue = attributeValue[0] << 8 | attributeValue[1];
RecordingAttribute shortAttribute = new RecordingAttribute(attributeName, type, shortValue);
return (shortAttribute);
default:
return (null);
}
}
/// <summary>Gets the value of the specified attribute.</summary>
/// <param name="itemType">The type of the attribute.</param>
/// <param name="valueData">The byte array to be parsed.</param>
protected static object ParseAttributeValue(StreamBufferAttrDataType itemType, byte[] valueData)
{
if (!Enum.IsDefined(typeof(StreamBufferAttrDataType), itemType))
throw new ArgumentOutOfRangeException("itemType");
if (valueData == null) throw new ArgumentNullException("valueData");
// Convert the attribute value to a byte array based on the item type.
switch (itemType)
{
case StreamBufferAttrDataType.String:
StringBuilder sb = new StringBuilder(valueData.Length);
for (int i = 0; i < valueData.Length - 2; i += 2)
{
sb.Append(Convert.ToString(BitConverter.ToChar(valueData, i), System.Globalization.CultureInfo.InvariantCulture));
}
string result = sb.ToString();
if (result.EndsWith("\\0")) result = result.Substring(0, result.Length - 2);
return result;
case StreamBufferAttrDataType.Bool: return BitConverter.ToBoolean(valueData, 0);
case StreamBufferAttrDataType.DWord: return BitConverter.ToInt32(valueData, 0);
case StreamBufferAttrDataType.QWord: return BitConverter.ToInt64(valueData, 0);
case StreamBufferAttrDataType.Word: return BitConverter.ToInt16(valueData, 0);
case StreamBufferAttrDataType.Guid: return new Guid(valueData);
case StreamBufferAttrDataType.Binary: return valueData;
default: throw new ArgumentOutOfRangeException("itemType");
}
}
