public void ReadItems(MemoryStream reader)
{
//if developer did not define item of this message
if (m_Items.Count == 0)
{
byte[] formatCodeByte = new byte[1];
SecsItem item;
FormatCode fc;
byte lenghtByteLong;
while (reader.Position < reader.Length)
{
reader.Read(formatCodeByte, 0, formatCodeByte.Length);
//move back to format code position because *1
reader.Position -= formatCodeByte.Length;
fc = FormatCodeHelper.GetFormatCode(formatCodeByte[0], out lenghtByteLong);
item = SecsItemFactory.Create("DV" + m_Items.Count.ToString(), fc);
//*1 this function is read format code also
item.Read(reader);
AddItem(item);
}
}
//if developer already defined item of this message
else if (m_Items.Count > 0)
{
foreach (SecsItem item in m_Items)
{
item.Read(reader);
}
}
}
public SecsItem CreateItem(string itemName)
{
SecsItem ret = null;
if (m_DataItemDictionary.ContainsKey(itemName))
{
SecsDataItem def = m_DataItemDictionary[itemName];
ret = SecsItemFactory.Create(def.Name, def.Format);
}
else
{
throw new Exception("No item defination for item name :=" + itemName);
}
return(ret);
}
protected override void ReadValue(System.IO.MemoryStream reader, uint itemToRead)
{
List <SecsItem> elements = this.Value;
if (elements.Count == 0) //not fixed item list
{
long readItemCount = 0;
byte[] formatCodeByte = new byte[1];
byte lenghtByteLong = 0;
FormatCode fc;
SecsItem item = null;
while (readItemCount < itemToRead)
{
reader.Read(formatCodeByte, 0, formatCodeByte.Length);
//move back to format code position
reader.Position -= formatCodeByte.Length;
fc = FormatCodeHelper.GetFormatCode(formatCodeByte[0], out lenghtByteLong);
item = SecsItemFactory.Create("DV" + elements.Count.ToString(), fc);
item.Read(reader);
elements.Add(item);
readItemCount += 1;
} //while (readItemCount < itemToRead)
}
else if (itemToRead == elements.Count) //fixed item list
{
//class defination error
foreach (SecsItem item in elements)
{
item.Read(reader);
}
}
else
{
//invalid define
throw new Exception("Defined item count is not equal to item to read");
}
}