internal protected override bool TryCreate(MetaElementType elementType, out ReadElement element)
{
switch (elementType)
{
case MetaElementType.SequenceItem:
SequenceItemReadElement itemReadElement = new SequenceItemReadElement();
itemList.Add(itemReadElement);
element = itemReadElement;
return(true);
default:
element = null;
return(false);
}
}
internal protected virtual bool ResolveItemsTo(FtMetaSequence sequence, FtMetaFieldList fieldList, FtMetaSequenceList sequenceList, out string errorDescription)
{
ItemSorter.Rec[] sorterRecArray = new ItemSorter.Rec[itemList.Count + fieldIndices.Length];
SequenceItemReadElement[] sortedItemElements;
for (int i = 0; i < itemList.Count; i++)
{
SequenceItemReadElement itemElement = itemList[i];
sorterRecArray[i].Target = itemElement;
sorterRecArray[i].Implicit = i;
sorterRecArray[i].Explicit = itemElement.ExplicitIndex;
}
int elementallyDefinedItemCount = itemList.Count;
for (int i = 0; i < fieldIndices.Length; i++)
{
SequenceItemReadElement itemElement = new SequenceItemReadElement();
// Add FieldIndex to element as if it were read from an attribute.
int fieldIndex = fieldIndices[i];
string attributeName = SequenceItemPropertyIdFormatter.ToAttributeName(FtMetaSequenceItem.PropertyId.FieldIndex);
string attributeValue = FtStandardText.Get(fieldIndex);
if (!itemElement.TryAddOrIgnoreAttribute(attributeName, attributeValue, out errorDescription))
{
throw FtInternalException.Create(InternalError.SequenceReadElement_ResolveItemsTo_TryAddOrIgnoreAttribute, errorDescription); // program error
}
else
{
int implicitIndex = elementallyDefinedItemCount + i;
sorterRecArray[implicitIndex].Target = itemElement;
sorterRecArray[implicitIndex].Implicit = implicitIndex;
sorterRecArray[implicitIndex].Explicit = -1;
}
}
int duplicateExplicitIndex;
if (!ItemSorter.TrySort(sorterRecArray, out sortedItemElements, out duplicateExplicitIndex))
{
errorDescription = string.Format(Properties.Resources.SequenceReadElement_ResolveItemsTo_DuplicateExplicitIndex, duplicateExplicitIndex);
return(false);
}
else
{
errorDescription = "";
bool result = true;
for (int i = 0; i < sortedItemElements.Length; i++)
{
SequenceItemReadElement itemElement = sortedItemElements[i];
FtMetaSequenceItem item = sequence.ItemList.New();
if (!itemElement.ResolveTo(item, fieldList, sequenceList, out errorDescription))
{
result = false;
break;
}
}
return(result);
}
}