public override IAliasedExpression Visit(JoinedTableExpression item)
{
if (item.On.RightExpression is NLinq.Expressions.MemberExpression)
{
Visit(item.On.LeftExpression);
referencePath.Length = 0;
NLinq.Expressions.MemberExpression propertyReference = (NLinq.Expressions.MemberExpression)item.On.RightExpression;
IAliasedExpression join = (IAliasedExpression)Visit(propertyReference);
//if (loadedReferences.ContainsKey(((EntityIdentifier)item.On.LeftExpression).Text))
//{
// AliasesMapping.Add(loadedReferences[((EntityIdentifier)item.On.LeftExpression).Text], lastAliasDefined);
loadedReferences[((EntityIdentifier)item.On.LeftExpression).Text] = lastAliasDefined;
//}
//else
// loadedReferences.Add(((EntityIdentifier)item.On.LeftExpression).Text, lastAliasDefined);
if (!AliasesMapping.ContainsKey(item.RightTable.Alias))
AliasesMapping.Add(item.RightTable.Alias, join.Alias);
return join;
}
return item;
}
public virtual IAliasedExpression Update(JoinedTableExpression item, IAliasedExpression leftTable, IAliasedExpression rightTable, JoinType joinType, TableAlias alias, Evaluant.NLinq.Expressions.BinaryExpression on)
{
if (item.LeftTable != leftTable || item.RightTable != rightTable || item.JoinType != joinType || item.Alias != alias)
return new JoinedTableExpression(leftTable, rightTable, joinType, alias, on);
return item;
}
private void BuildConstraint(Evaluant.Uss.SqlMapper.Mapping.Reference rm, out TableAlias firstAlias)
{
BinaryExpression on = null;
JoinedTableExpression join = null;
TableAlias lastAlias = null;
firstAlias = new LazyTableAlias(rm.Rules[0].ParentTable);
foreach (Mapping.Rule rule in rm.Rules)
{
JoinedTableExpression tempJoin = new JoinedTableExpression(new TableSourceExpression(lastAlias ?? firstAlias, rule.ParentTable), new TableSourceExpression(new TableAlias(), rule.ChildTable));
BinaryExpression tempOn = null;
for (int i = 0; i < rule.ParentFields.Count; i++)
{
Field parentField = rule.ParentFields[i];
Field childField = rule.ChildFields[i];
BinaryExpression localOn = new BinaryExpression(BinaryExpressionType.Equal,
new ColumnExpression(tempJoin.LeftTable.Alias, parentField.ColumnName),
new ColumnExpression(tempJoin.RightTable.Alias, childField.ColumnName));
if (tempOn == null)
tempOn = localOn;
else
tempOn = new BinaryExpression(BinaryExpressionType.And, tempOn, localOn);
}
tempJoin.On = tempOn;
if (join != null)
tempJoin.LeftTable = join;
lastAlias = tempJoin.RightTable.Alias;
join = tempJoin;
if (on == null)
on = tempOn;
else
on = new BinaryExpression(BinaryExpressionType.And, on, tempOn);
}
joins[rm] = join;
ons[rm] = on;
}