public static string[] ResolveEntityAndAlias(Net.Vpc.Upa.Expressions.QueryStatement select)
{
if (select is Net.Vpc.Upa.Expressions.Select)
{
return(ResolveEntityAndAlias((Net.Vpc.Upa.Expressions.Select)select));
}
if (select is Net.Vpc.Upa.Expressions.Union)
{
Net.Vpc.Upa.Expressions.Union u = (Net.Vpc.Upa.Expressions.Union)select;
string[] last = null;
foreach (Net.Vpc.Upa.Expressions.QueryStatement queryStatement in u.GetQueryStatements())
{
string[] s = ResolveEntityAndAlias(queryStatement);
if (s == null)
{
return(null);
}
else if (last == null)
{
last = s;
}
else
{
if (!Net.Vpc.Upa.Impl.FwkConvertUtils.ArraysEquals <string>(last, s))
{
return(null);
}
}
}
return(last);
}
return(null);
}
public virtual Net.Vpc.Upa.Persistence.ResultMetaData CreateResultMetaData(Net.Vpc.Upa.Expressions.Expression baseExpression, Net.Vpc.Upa.Filters.FieldFilter fieldFilter, System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryStatement> context)
{
baseExpression = Net.Vpc.Upa.Impl.Uql.Util.UQLUtils.ParseUserExpressions(baseExpression, pu);
Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData m = new Net.Vpc.Upa.Impl.Persistence.DefaultResultMetaData();
if (baseExpression is Net.Vpc.Upa.Expressions.NonQueryStatement)
{
m.SetStatement((Net.Vpc.Upa.Expressions.EntityStatement)baseExpression);
m.AddField(new Net.Vpc.Upa.Impl.Persistence.DefaultResultField(null, "result", Net.Vpc.Upa.Types.TypesFactory.INT, null, null));
return(m);
}
else
{
Net.Vpc.Upa.Expressions.QueryStatement q = (Net.Vpc.Upa.Expressions.QueryStatement)baseExpression;
if (q is Net.Vpc.Upa.Expressions.Select)
{
Net.Vpc.Upa.Expressions.Select qs = (Net.Vpc.Upa.Expressions.Select)q;
if ((qs.GetFields()).Count == 0)
{
if (!Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(qs.GetEntityAlias()))
{
qs.Field(new Net.Vpc.Upa.Expressions.Var(qs.GetEntityAlias()));
}
else if (qs.GetEntityName() != null)
{
qs.Field(new Net.Vpc.Upa.Expressions.Var(qs.GetEntityName()));
}
else
{
throw new Net.Vpc.Upa.Exceptions.UPAException("MissingAlias");
}
foreach (Net.Vpc.Upa.Expressions.JoinCriteria joinCriteria in qs.GetJoins())
{
if (!Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(joinCriteria.GetEntityAlias()))
{
qs.Field(new Net.Vpc.Upa.Expressions.Var(joinCriteria.GetEntityAlias()));
}
else if (joinCriteria.GetEntityName() != null)
{
qs.Field(new Net.Vpc.Upa.Expressions.Var(joinCriteria.GetEntityName()));
}
else
{
throw new Net.Vpc.Upa.Exceptions.UPAException("MissingAlias");
}
}
}
System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryField> oldFields = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryField>(q.GetFields());
System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryField> newFields = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryField>();
System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> newResults = new System.Collections.Generic.List <Net.Vpc.Upa.Persistence.ResultField>();
System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryStatement> context2 = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryStatement>();
Net.Vpc.Upa.Impl.FwkConvertUtils.ListAddRange(context2, context);
context2.Add(q);
foreach (Net.Vpc.Upa.Expressions.QueryField f in oldFields)
{
Net.Vpc.Upa.Expressions.Expression expression = f.GetExpression();
string oldAlias = f.GetAlias();
System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> newVal = CreateResultFields(expression, oldAlias, fieldFilter, context2);
Net.Vpc.Upa.Impl.FwkConvertUtils.ListAddRange(newResults, newVal);
if ((newVal).Count == 0)
{
}
else if ((newVal).Count == 1)
{
f.SetExpression(newVal[0].GetExpression());
f.SetAlias(Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(oldAlias) ? oldAlias : newVal[0].GetAlias());
newFields.Add(f);
}
else
{
foreach (Net.Vpc.Upa.Persistence.ResultField nf in newVal)
{
Net.Vpc.Upa.Expressions.QueryField f2 = new Net.Vpc.Upa.Expressions.QueryField(Net.Vpc.Upa.Impl.Util.StringUtils.IsNullOrEmpty(oldAlias) ? oldAlias : nf.GetAlias(), nf.GetExpression());
newFields.Add(f2);
}
}
}
qs.ClearFields();
foreach (Net.Vpc.Upa.Expressions.QueryField newField in newFields)
{
qs.Field(newField);
}
m.SetStatement(qs);
foreach (Net.Vpc.Upa.Persistence.ResultField newResult in newResults)
{
m.AddField(newResult);
}
}
else if (q is Net.Vpc.Upa.Expressions.Union)
{
System.Collections.Generic.IList <Net.Vpc.Upa.Expressions.QueryStatement> context2 = new System.Collections.Generic.List <Net.Vpc.Upa.Expressions.QueryStatement>();
Net.Vpc.Upa.Impl.FwkConvertUtils.ListAddRange(context2, context);
context2.Add(q);
Net.Vpc.Upa.Expressions.Union u0 = (Net.Vpc.Upa.Expressions.Union)q;
Net.Vpc.Upa.Expressions.Union u = new Net.Vpc.Upa.Expressions.Union();
Net.Vpc.Upa.Persistence.ResultField[] fields = null;
foreach (Net.Vpc.Upa.Expressions.QueryStatement qs in u0.GetQueryStatements())
{
Net.Vpc.Upa.Persistence.ResultMetaData resultMetaData = CreateResultMetaData(qs, fieldFilter, context2);
u.Add((Net.Vpc.Upa.Expressions.QueryStatement)resultMetaData.GetStatement());
System.Collections.Generic.IList <Net.Vpc.Upa.Persistence.ResultField> f = resultMetaData.GetFields();
if (fields == null)
{
fields = f.ToArray();
}
else
{
if (fields.Length != (f).Count)
{
throw new Net.Vpc.Upa.Exceptions.UPAException("InvalidUnion");
}
for (int i = 0; i < fields.Length; i++)
{
fields[i] = Merge(fields[i], f[i]);
}
}
}
m.SetStatement(u);
if (fields != null)
{
foreach (Net.Vpc.Upa.Persistence.ResultField field in fields)
{
m.AddField(field);
}
}
}
else
{
throw new System.Exception();
}
}
return(m);
}