/// <summary>
///
/// </summary>
/// <param name="attribute"></param>
/// <param name="valueStr"></param>
/// <param name="dbFields"></param>
/// <returns></returns>
protected virtual bool setDBSegmentAttribute(DBSegment dbSegment, string attribute, string valueStr, List <DBField> dbFields)
{
int tmp;
switch (attribute)
{
case ConstInterface.MG_ATTR_FLAGS:
IntUtil.TryParse(valueStr, out tmp);
dbSegment.Flags = tmp;
break;
case ConstInterface.MG_ATTR_ISN:
IntUtil.TryParse(valueStr, out tmp);
dbSegment.Isn = tmp;
break;
case ConstInterface.MG_ATTR_FLD_ISN:
int fldIsn;
IntUtil.TryParse(valueStr, out fldIsn);
dbSegment.Field = dbFields.Find(x => x.Isn == fldIsn);
break;
default:
return(false);
}
return(true);
}
/// <summary>
/// build sort key
/// </summary>
/// <returns>DbKey</returns>
internal DBKey Build()
{
DBKey sortKey = new DBKey();
sortKey.SetMask(KeyMasks.KeySortMask);
sortKey.SetMask(KeyMasks.KeyTypeVirtual);
if (mainView.LocalDataviewManager.Task.UniqueSort == UniqueTskSort.Unique)
{
sortKey.SetMask(KeyMasks.UniqueKeyModeMask);
}
else
{
sortKey.SetMask(KeyMasks.DuplicateKeyModeMask);
}
for (int i = 0; i < RuntimeSorts.getSize(); i++)
{
int indexInView = RuntimeSorts.getSort(i).fldIdx;
if (IsFieldSortable(indexInView))
{
Sort sort = RuntimeSorts.getSort(i);
DBSegment seg = BuildSegment(sort.dir, sort.fldIdx);
sortKey.Segments.Add(seg);
}
}
if (sortKey.Segments.Count == 0)
{
return(null);
}
return(sortKey);
}
/// <summary>
///
/// </summary>
/// <param name="attributes"></param>
/// <param name="dbFields"></param>
internal void SetDBSegmentAttributes(DBSegment dbSegment, NameValueCollection attributes, List <DBField> dbFields)
{
IEnumerator enumerator = attributes.GetEnumerator();
while (enumerator.MoveNext())
{
String attr = (String)enumerator.Current;
setDBSegmentAttribute(dbSegment, attr, attributes[attr], dbFields);
}
}
/// <summary>
/// build segment for Sort Key
/// </summary>
/// <param name="dir"></param>
/// <param name="fldIdx"></param>
internal DBSegment BuildSegment(Boolean dir, int fldIdx)
{
DBSegment seg = new DBSegment();
int realFldIdx = mainView.GetFieldIndexInViewByIndexInRecord(fldIdx - 1);
seg.Field = mainView.GetDbField(realFldIdx);
seg.SetMask(dir == true ? SegMasks.SegDirAscendingMask : SegMasks.SegDirDescendingMask);
return(seg);
}
/// <summary>
///
/// </summary>
/// <param name="elementName"></param>
/// <param name="elementValue"></param>
/// <param name="attributes"></param>
public void endElement(string elementName, string elementValue, NameValueCollection attributes)
{
switch (elementName)
{
case ConstInterface.MG_TAG_KEYS:
case ConstInterface.MG_TAG_SEGS:
case ConstInterface.MG_TAG_FLDS:
// closing collection - do nothing
return;
case ConstInterface.MG_TAG_DBH:
case ConstInterface.MG_TAG_DBH_DATA_ID:
// set the attributes
dataSourceBuilder.SetAttributes(dataSourceDefinition, attributes);
break;
case ConstInterface.MG_TAG_FLD:
// create the field and add it to the DataSourceDefinition
DBField field = new DBField();
dataSourceBuilder.SetDBFieldAttributes(field, attributes);
dataSourceBuilder.AddField(dataSourceDefinition, field);
break;
case ConstInterface.MG_TAG_KEY:
// create the key and add it to the DataSourceDefinition
DBKey key = new DBKey();
dataSourceBuilder.SetDBKeyAttributes(key, attributes);
// Add the segments collection and reset the local one
key.Segments = segments;
segments = new List <DBSegment>();
dataSourceBuilder.AddKey(dataSourceDefinition, key);
break;
case ConstInterface.MG_TAG_SEG:
// create the segment and add it to the DataSourceDefinition
DBSegment segment = new DBSegment();
dataSourceBuilder.SetDBSegmentAttributes(segment, attributes, dataSourceDefinition.Fields);
dataSourceBuilder.AddSegment(dataSourceDefinition, segment);
break;
case ConstInterface.MG_TAG_SEGMENT:
// Get the segment's isn and add the segment to the local segment collection. This way it will be added
// later to the right key
int isn;
IntUtil.TryParse((string)attributes.GetValues(0)[0], out isn);
segments.Add(dataSourceDefinition.Segments.Find(x => x.Isn == isn));
break;
}
}
/// <summary>
/// compares old segment with new segment
/// </summary>
/// <param name="oldSegment"></param>
/// <param name="newSegment"></param>
/// <returns>returns success if no mismatch found</returns>
private ComparisonResult CompareSegment(DBSegment oldSegment, DBSegment newSegment)
{
if (oldSegment.Field.Isn != newSegment.Field.Isn)
{
return(ComparisonResult.Failed);
}
if ((oldSegment.CheckMask(SegMasks.SegDirAscendingMask) && newSegment.CheckMask(SegMasks.SegDirDescendingMask)) ||
(newSegment.CheckMask(SegMasks.SegDirAscendingMask) && oldSegment.CheckMask(SegMasks.SegDirDescendingMask)))
{
return(ComparisonResult.Failed);
}
return(ComparisonResult.Success);
}
/// <summary>
/// compares old key with new key
/// </summary>
/// <param name="oldKey"></param>
/// <param name="newKey"></param>
/// <returns>returns success if no mismatch found</returns>
private ComparisonResult CompareKey(DBKey oldKey, DBKey newKey)
{
if (oldKey.CheckMask(KeyMasks.KeyTypeVirtual) && newKey.CheckMask(KeyMasks.KeyTypeVirtual))
{
return(ComparisonResult.Success);
}
if (oldKey.Segments.Count != newKey.Segments.Count)
{
return(ComparisonResult.Failed);
}
if ((oldKey.CheckMask(KeyMasks.DuplicateKeyModeMask) && newKey.CheckMask(KeyMasks.UniqueKeyModeMask)) ||
(newKey.CheckMask(KeyMasks.DuplicateKeyModeMask) && oldKey.CheckMask(KeyMasks.UniqueKeyModeMask)))
{
return(ComparisonResult.Failed);
}
if ((oldKey.CheckMask(KeyMasks.KeyTypeVirtual) && newKey.CheckMask(KeyMasks.KeyTypeReal)) ||
(newKey.CheckMask(KeyMasks.KeyTypeVirtual) && oldKey.CheckMask(KeyMasks.KeyTypeReal)))
{
return(ComparisonResult.Failed);
}
if ((oldKey.CheckMask(KeyMasks.KeyPrimaryMask) && !newKey.CheckMask(KeyMasks.KeyPrimaryMask)) ||
(newKey.CheckMask(KeyMasks.KeyPrimaryMask) && !oldKey.CheckMask(KeyMasks.KeyPrimaryMask)))
{
return(ComparisonResult.Failed);
}
// compare segments of real keys
for (int idx = 0; idx < oldKey.Segments.Count; idx++)
{
DBSegment oldSegment = oldKey.Segments[idx];
DBSegment newSegment = newKey.Segments[idx];
if (CompareSegment(oldSegment, newSegment) == ComparisonResult.Failed)
{
return(ComparisonResult.Failed);
}
}
return(ComparisonResult.Success);
}
/// <summary>
///
/// </summary>
/// <param name="segment"></param>
internal void AddSegment(DataSourceDefinition dataSourceDefinition, DBSegment segment)
{
dataSourceDefinition.Segments.Add(segment);
}
