public virtual Net.Vpc.Upa.Expressions.Expression CreateFindEntityByMainPathExpression(string mainFieldPath, string entityAlias)
{
Net.Vpc.Upa.Entity entity = GetEntity();
Net.Vpc.Upa.RelationshipRole detailRole = GetTreeRelationship().GetSourceRole();
if (Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(mainFieldPath))
{
return(null);
}
string mainFieldName = entity.GetMainField().GetName();
object mainFieldValue = null;
object parent = null;
string[] parentAndName = Net.Vpc.Upa.Impl.Util.StringUtils.Split(mainFieldPath, GetHierarchyPathSeparator()[0], false);
if (parentAndName != null)
{
parent = FindEntityByMainPath(parentAndName[0]);
mainFieldValue = parentAndName[1];
}
else
{
mainFieldValue = mainFieldPath;
}
Net.Vpc.Upa.Expressions.Expression expr = null;
if (entityAlias == null)
{
entityAlias = entity.GetName();
}
expr = new Net.Vpc.Upa.Expressions.Equals(new Net.Vpc.Upa.Expressions.Var(new Net.Vpc.Upa.Expressions.Var(entityAlias), mainFieldName), mainFieldValue);
Net.Vpc.Upa.Key entityToKey = parent == null ? null : entity.GetBuilder().ObjectToKey(parent);
System.Collections.Generic.IList <Net.Vpc.Upa.Field> primaryFields = detailRole.GetFields();
for (int index = 0; index < (primaryFields).Count; index++)
{
Net.Vpc.Upa.Field field = primaryFields[index];
expr = new Net.Vpc.Upa.Expressions.And(expr, new Net.Vpc.Upa.Expressions.Equals(new Net.Vpc.Upa.Expressions.Var(new Net.Vpc.Upa.Expressions.Var(entityAlias), field.GetName()), entityToKey == null ? null : entityToKey.GetObjectAt(index)));
}
return(expr);
}
