public static RowDataCompareResult Compare(TableDefinition tableDefinition, SnapshotRowKey snapshotRowKey,
SnapshotRow beforeRow, SnapshotRow afterRow)
{
var result = true;
var nonKeyFieldNames = beforeRow.GetFieldNames()
.Concat(afterRow.GetFieldNames())
.Distinct()
.Except(snapshotRowKey.GetFieldNames().Concat(tableDefinition.ExcludedColumns))
.ToList();
var diffs = new List <FieldDifference>();
foreach (var fieldName in nonKeyFieldNames)
{
var before = beforeRow.GetField(fieldName);
var after = afterRow.GetField(fieldName);
var compareResult = ValueComparer.Compare(before, after);
if (compareResult != 0)
{
diffs.Add(new FieldDifference(fieldName, before, after));
result = false;
}
}
return(new RowDataCompareResult(result, diffs, beforeRow, afterRow));
}
public SnapshotRow AddRow()
{
var row = new SnapshotRow(this);
_rows.Add(row);
return(row);
}
public RowDataCompareResult(bool matched, IList <FieldDifference> differences, SnapshotRow before, SnapshotRow after)
{
Matched = matched;
_differences = differences != null ? new ReadOnlyCollection <FieldDifference>(differences) : null;
Before = before;
After = after;
}
internal SnapshotRowKey(SnapshotRow snapshotRow, TableDefinition tableDefinition)
{
if (tableDefinition.CompareKeys.Any())
{
_keys = GetKeys(snapshotRow, tableDefinition.CompareKeys);
}
else if (tableDefinition.PrimaryKeys.Any())
{
_keys = GetKeys(snapshotRow, tableDefinition.PrimaryKeys);
}
else
{
_keys = GetKeys(snapshotRow, tableDefinition.Columns.Select(c => c.Name));
}
}
private List <object> GetKeys(SnapshotRow snapshotRow, IEnumerable <string> keyFields)
{
_fields = keyFields.ToList();
return(_fields.Select(snapshotRow.GetField).ToList());
}