/// <summary>
/// The CloneBlock method is invoked to create a copy of an
/// instance of a component block definition.
/// </summary>
/// <param name="source">
/// The component block to be duplicated.
/// </param>
/// <returns>
/// The resulting clone of the supplied block.
/// </returns>
private FixDxBlock CloneBlock(FixDxBlock source)
{
FixDxBlock result = new FixDxBlock(source.Name, source.Category, source.Field);
foreach (IFixDxElement dxElement in source.Elements)
{
result.Elements.Add(CloneElement(dxElement));
}
return(result);
}
/// <summary>
/// The GetBlockByName method attempts to lookup a block
/// based on the text name that is assigned to it.
/// </summary>
/// <param name="name">
/// The name of the component block to retrieve.
/// </param>
/// <returns>
/// The corresponding component block, or null if there is
/// no matching entry in the dictionary.
/// </returns>
public FixDxBlock GetBlockByName(string name)
{
FixDxBlock result = null;
if (_mapBlocksByName.ContainsKey(name))
{
result = _mapBlocksByName[name];
}
return(result);
}
/// <summary>
/// The Expand method iterates over all of the elements in
/// a collection of dictionary elements and expands any of
/// them that reference collections of other elements.
/// </summary>
/// <param name="source">
/// The collection of elements to expand.
/// </param>
/// <returns>
/// A new instance of a collection of dictionary elements
/// with all expandable references in the source collection
/// having been recursively expanded.
/// </returns>
public FixDxCollection Expand(FixDxCollection source)
{
FixDxCollection result = new FixDxCollection();
foreach (IFixDxElement dxEntry in source)
{
if (dxEntry is FixDxBlockReference)
{
FixDxBlockReference blockReference = dxEntry as FixDxBlockReference;
if (blockReference != null)
{
if (_mapBlocksByName.ContainsKey(blockReference.Name))
{
FixDxBlock blockEntry = _mapBlocksByName[blockReference.Name];
FixDxCollection blockElements = Expand(blockEntry.Elements);
foreach (IFixDxElement blockElement in blockElements)
{
if (blockElement is FixDxFieldReference)
{
FixDxFieldReference reference = blockElement as FixDxFieldReference;
result.Add(reference);
}
else if (blockElement is FixDxBlockReference)
{
FixDxBlockReference reference = blockElement as FixDxBlockReference;
result.Add(reference);
}
}
}
}
}
else
{
if (dxEntry is FixDxGroupReference)
{
FixDxGroupReference srcReference = dxEntry as FixDxGroupReference;
FixDxGroupReference dstReference = new FixDxGroupReference(srcReference.Name, srcReference.Required);
foreach (IFixDxElement srcElement in Expand(srcReference.Elements))
{
dstReference.Elements.Add(srcElement);
}
result.Add(dstReference);
}
else if (dxEntry is FixDxFieldReference)
{
FixDxFieldReference element = dxEntry as FixDxFieldReference;
result.Add(element);
}
}
}
return(result);
}
/// <summary>
/// The AddBlock method adds an instance of a FIX component
/// block to the dictionary. If there is already an instance
/// of a component block with the same name, an operation is
/// not allowed and an ArgumentException is thrown.
/// </summary>
/// <param name="dxBlock">
/// The FIX component block definition that is to be added.
/// </param>
public void AddBlock(FixDxBlock dxBlock)
{
if (_mapBlocksByName.ContainsKey(dxBlock.Name))
{
string error = string.Format("Dictionary already contains a block named {0}.", dxBlock.Name);
throw new ArgumentException(error);
}
_mapBlocksByName.Add(dxBlock.Name, dxBlock);
_blkElements.Add(dxBlock);
}
/// <summary>
/// The PopulateBlocks method populates the blocks section
/// of the supplied VFX dictionary with all of the blocks
/// that are defined in the supplied XML dictionary.
/// </summary>
/// <param name="source">
/// The source dictionary for the block elements.
/// </param>
/// <param name="target">
/// The target dictionary for the converted elements.
/// </param>
private static void PopulateBlocks(XmlDictionary source, FixDictionary target)
{
foreach (XmlFixDxBlock src in source.Blocks.Entries)
{
FixDxBlock dst = new FixDxBlock(src.Name);
dst.Type = (FixDxBlockTypes)Enum.Parse(typeof(FixDxBlockTypes), src.Type);
dst.Field = src.Field;
dst.Category = src.Category;
foreach (IFixDxElement element in TranslateElements(src.Elements))
{
dst.Elements.Add(element);
}
target.AddBlock(dst);
}
}
/// <summary>
/// The ExportBlocks method is invoked to convert all of
/// the block elements in an instance of a VersaFix data
/// dictionary into corresponding entries in an instance
/// of an XML representation of a QuickFix dictionary.
/// </summary>
/// <param name="src">
/// The source dictionary for the block definitions.
/// </param>
/// <param name="dst">
/// The target dictionary for the block definitions.
/// </param>
private void ExportBlocks(FixDictionary src, XmlQfxDictionary dst)
{
foreach (IFixDxElement dxElement in src.Blocks)
{
FixDxBlock dxBlock = dxElement as FixDxBlock;
if (dxBlock != null)
{
XmlQfxBlock xmlBlock = new XmlQfxBlock();
xmlBlock.Name = dxBlock.Name;
foreach (IFixDxElement dxBlockElement in dxBlock.Elements)
{
ExportElement(dxBlockElement, xmlBlock.Elements);
}
dst.Blocks.Add(xmlBlock);
}
}
}
/// <summary>
/// The PopulateBlocks method is invoked to convert all of the
/// component block definitions in a QuickFix dictionary into
/// corresponding component block definitions in an instance of
/// a VersaFix dictionary.
/// </summary>
/// <param name="src">
/// The QuickFix dictionary to copy the blocks from.
/// </param>
/// <param name="dst">
/// The VersaFix dictionary to copy the blocks into.
/// </param>
private void PopulateBlocks(XmlQfxDictionary src, FixDictionary dst)
{
foreach (object block in src.Blocks)
{
XmlQfxBlock xmlBlock = block as XmlQfxBlock;
if (xmlBlock != null)
{
if (!string.IsNullOrEmpty(xmlBlock.Name))
{
FixDxBlock dxBlock = new FixDxBlock(xmlBlock.Name);
foreach (object element in xmlBlock.Elements)
{
IFixDxElement dxElement = ConvertElement(element);
if (dxElement != null)
{
dxBlock.Elements.Add(dxElement);
}
}
dst.Blocks.Add(dxBlock);
}
}
}
}
/// <summary>
/// The Resolve method attempts to resolve all of the
/// element references in a collection to the entries
/// that correspond to them.
/// </summary>
/// <param name="elements">
/// The collection of dictionary elements to resolve.
/// </param>
/// <returns>
/// The resulting collection of resolved elements.
/// </returns>
/// <exception cref="ArgumentException">
/// Thrown if any elements in the collection that is
/// supplied to the method cannot be resolved.
/// </exception>
public FixDxCollection Resolve(FixDxCollection elements)
{
FixDxCollection result = new FixDxCollection();
// REC: Iterate over all of the elements in the collection
// and determine how to resolve each of them:
foreach (IFixDxElement dxElement in elements)
{
if (dxElement is FixDxFieldReference)
{
FixDxFieldReference fieldReference = dxElement as FixDxFieldReference;
result.Add(ResolveFieldReference(fieldReference));
}
else if (dxElement is FixDxGroupReference)
{
FixDxGroupReference groupReference = dxElement as FixDxGroupReference;
result.Add(ResolveGroupReference(groupReference));
}
else if (dxElement is FixDxBlockReference)
{
FixDxBlockReference blockReference = dxElement as FixDxBlockReference;
// REC: Determine what type of block the reference
// is referring to (component or repeating):
if (string.IsNullOrEmpty(blockReference.Name))
{
string error = "The supplied block reference's name is null or empty.";
throw new ArgumentException(error);
}
else if (!_mapBlocksByName.ContainsKey(blockReference.Name))
{
string error = string.Format("The block reference {0} couldn't be resolved.", blockReference.Name);
throw new ArgumentException(error);
}
else
{
FixDxBlock dxBlock = _mapBlocksByName[blockReference.Name];
if (dxBlock.Type == FixDxBlockTypes.Component)
{
foreach (IFixDxElement element in Resolve(Expand(dxBlock.Elements)))
{
result.Add(element);
}
}
else if (dxBlock.Type == FixDxBlockTypes.Repeating)
{
// REC: Attempt to resolve the field that the repeating
// block references as the start field for the group:
if (string.IsNullOrEmpty(dxBlock.Field))
{
string error = string.Format("Repeating Block {0}'s start field is null or empty.", dxBlock.Field);
throw new ArgumentException(error);
}
else if (!_mapFieldsByName.ContainsKey(dxBlock.Field))
{
string error = string.Format("Repeating block {0}'s start field can't be resolved.", dxBlock.Field);
throw new ArgumentException(error);
}
else
{
FixDxField dxField = _mapFieldsByName[dxBlock.Field];
FixDxResolvedGroup dxGroup = new FixDxResolvedGroup(dxField.Tag, dxField.Name, false);
foreach (IFixDxElement element in Resolve(Expand(dxBlock.Elements)))
{
dxGroup.Elements.Add(element);
}
result.Add(dxGroup);
}
}
}
}
}
// REC: Patch from RC - sanity check all elements in the result
// to ensure that there are no unresolved references.
foreach (IFixDxElement e in result)
{
if (e is FixDxFieldReference || e is FixDxGroupReference || e is FixDxFieldReference)
{
throw new Exception("unresolved references exist in the resolved collection");
}
}
return(result);
}
