public string ToSelectText(ConstraintType constraintType)
{
using (DbTextWriter writer = new DbTextWriter())
{
return(ToSelectText(writer, constraintType));
}
}
private void WriteColumnPredicates(DbTextWriter writer, IEnumerable <ColumnPredicate> predicates)
{
int i = 0;
foreach (ColumnPredicate predicate in predicates)
{
if (predicate.OrToPreviousGroup)
{
OnWriteOr(writer);
}
else if (i++ >= 1)
{
OnWriteAnd(writer);
}
if (predicate.IsGroup)
{
WriteBeginGroup(writer);
for (ColumnPredicate current = predicate; current != null; current = current.NextInGroup)
{
WriteColumnPredicate(writer, current);
}
}
else
{
WriteColumnPredicate(writer, predicate);
}
}
}
protected virtual void OnWriteGroupBys(DbTextWriter writer)
{
if (groupBys == null || groupBys.Count == 0)
{
return;
}
writer.WriteGroupBy(GroupBys);
}
private void WriteEndGroup(DbTextWriter writer)
{
if (groupCount == 0)
{
return;
}
OnWriteEndGroup(writer);
}
private void WriteCountSelect(DbTextWriter textWriter)
{
OnWriteCount(textWriter);
OnWriteFrom(textWriter);
OnWriteJoin(textWriter);
OnWriteWhere(textWriter);
OnWriteGroupBys(textWriter);
OnWriteHaving(textWriter);
OnWriteOrderBys(textWriter);
}
protected virtual void OnWriteHaving(DbTextWriter writer)
{
if (havingPredicates == null || havingPredicates.Count == 0)
{
return;
}
if (!writer.IsSelectionSet)
{
throw new InvalidOperationException("Select columns have not been set.");
}
writer.WriteHaving();
WriteColumnPredicates(writer, havingPredicates);
}
protected virtual void OnWriteJoin(DbTextWriter writer)
{
if (!writer.IsSelectionSet)
{
throw new InvalidOperationException("Select columns have not been set.");
}
if (!JoinInWhereClause && joinPredicates != null && joinPredicates.Count > 0)
{
WriteJoinPredicates(writer, joinPredicates);
}
if (!JoinInWhereClause && localizedJoinPredicates != null && localizedJoinPredicates.Count > 0)
{
WriteJoinPredicates(writer, localizedJoinPredicates);
}
}
private void WriteJoinPredicate(DbTextWriter writer, JoinPredicate current)
{
writer.WritePredicate(current, GetComparisonOperator(current.Comparison, current.ToColumn));
if (current.NextInGroup == null)
{
WriteEndGroup(writer);
}
if (current.NextInGroup != null && current.OrNextPredicate)
{
OnWriteOr(writer);
}
else if (current.NextInGroup != null)
{
OnWriteAnd(writer);
}
}
public string ToSelectText(DbTextWriter textWriter, ConstraintType constraintType)
{
Parameters.Clear();
if (Constraint.ConstraintType == ConstraintType.Page)
{
return(FormatPagingSql(textWriter, Constraint));
}
if (constraintType == ConstraintType.Count)
{
WriteCountSelect(textWriter);
}
else
{
WriteBasicSelect(textWriter);
}
return(textWriter.ToString());
}
protected virtual void OnWriteWhere(DbTextWriter writer)
{
if (!writer.IsSelectionSet)
{
throw new InvalidOperationException("Select columns have not been set.");
}
if (JoinInWhereClause && joinPredicates != null && joinPredicates.Count > 0)
{
writer.WriteWhere();
WriteWhereJoinPredicates(writer, joinPredicates);
}
if (wherePredicates != null && wherePredicates.Count > 0)
{
writer.WriteWhere();
WriteColumnPredicates(writer, wherePredicates);
}
}
private void WriteJoinPredicates(DbTextWriter writer, IEnumerable <JoinPredicate> predicates)
{
foreach (JoinPredicate predicate in predicates)
{
writer.Write(" LEFT JOIN {0} ON ", "[" + predicate.ToColumn.Table.Owner + "].[" + predicate.ToColumn.Table.Name + "] " + writer.GetTableAlias(predicate.ToColumn.Table));
if (predicate.IsGroup)
{
WriteBeginGroup(writer);
for (JoinPredicate current = predicate; current != null; current = current.NextInGroup)
{
WriteJoinPredicate(writer, current);
}
}
else
{
WriteJoinPredicate(writer, predicate);
}
}
}
private void WriteColumnPredicate(DbTextWriter writer, ColumnPredicate current)
{
if (current.IsJoinPredicate)
{
WriteJoinPredicate(writer, current);
return;
}
writer.WritePredicate(current.Column, GetComparisonOperator(current.Comparison, current.Value), AddParameter(current));
if (current.NextInGroup == null)
{
WriteEndGroup(writer);
}
if (current.NextInGroup != null && current.OrNextPredicate)
{
OnWriteOr(writer);
}
else if (current.NextInGroup != null)
{
OnWriteAnd(writer);
}
}
protected virtual void OnWriteEndGroup(DbTextWriter writer)
{
writer.Write(")");
groupCount--;
}
private void WriteBeginGroup(DbTextWriter writer)
{
OnWriteBeginGroup(writer);
groupCount++;
}
protected virtual void OnWriteSelect(DbTextWriter writer)
{
writer.WriteSelect(Columns, Constraint, Distinct);
}
protected virtual string FormatPagingSql(DbTextWriter textWriter, Constraint constraint)
{
WriteBasicSelect(textWriter);
return(textWriter.ToString());
}
protected virtual void OnWriteCount(DbTextWriter writer)
{
writer.WriteCount();
}
protected virtual void OnWriteFrom(DbTextWriter writer)
{
writer.WriteFrom(Tables.Values, NeedsAlias());
writer.WriteFrom(selfJoinTables, NeedsAlias());
}
protected virtual void OnWriteBeginGroup(DbTextWriter writer)
{
writer.Write("(");
}
protected virtual void OnWriteOrderBys(DbTextWriter writer)
{
writer.WriteOrderBy(OrderBys, Constraint);
}
public string ToSelectText(DbTextWriter textWriter)
{
return(ToSelectText(textWriter, ConstraintType.None));
}
protected virtual void OnWriteOr(DbTextWriter writer)
{
writer.Write(" OR ");
}
protected virtual void OnWriteAnd(DbTextWriter writer)
{
writer.Write(" AND ");
}
public string ToSelectText()
{
using (DbTextWriter writer = new DbTextWriter())
return(ToSelectText(writer, ConstraintType.None));
}
