private static LucQuery BuildLucQuery(System.Linq.Expressions.Expression expression, Type sourceCollectionItemType, string contextPath, ChildrenDefinition childrenDef)
{
Query q0 = null;
CQVisitor v = null;
// #1 compiling linq expression
if (expression != null)
{
var v1 = new SetExecVisitor();
var expr1 = v1.Visit(expression);
var expr2 = expr1;
if (v1.HasParameter)
{
var v2 = new ExecutorVisitor(v1.GetExpressions());
expr2 = v2.Visit(expr1);
}
v = new CQVisitor();
v.Visit(expr2);
q0 = v.GetQuery(sourceCollectionItemType, childrenDef);
}
// #2 combining with additional query clause
LucQuery lq = null;
if (!string.IsNullOrEmpty(childrenDef.ContentQuery))
{
lq = LucQuery.Parse(childrenDef.ContentQuery);
if (q0 == null)
{
q0 = lq.Query;
}
else
{
q0 = CombineQueries(q0, lq.Query);
}
}
// #3 combining with context path
if (q0 == null)
{
if (childrenDef != null && childrenDef.PathUsage != PathUsageMode.NotUsed && contextPath != null)
{
q0 = GetPathQuery(contextPath, childrenDef.PathUsage == PathUsageMode.InTreeAnd || childrenDef.PathUsage == PathUsageMode.InTreeOr);
}
}
else
{
if (childrenDef != null && childrenDef.PathUsage != PathUsageMode.NotUsed && contextPath != null)
{
q0 = CombinePathQuery(q0, contextPath, childrenDef.PathUsage);
}
}
// #4 empty query is invalid in this place
if (q0 == null)
{
throw new NotSupportedException("Cannot execute empty query. Expression: " + expression);
}
var q1 = OptimizeBooleans(q0);
// #5 configuring query by linq expression (the smallest priority)
var query = LucQuery.Create(q1);
if (v != null)
{
query.Skip = v.Skip;
query.Top = v.Top;
query.CountOnly = v.CountOnly;
query.SortFields = v.SortFields.ToArray();
query.ThrowIfEmpty = v.ThrowIfEmpty;
query.ExistenceOnly = v.ExistenceOnly;
}
// #6 configuring query by children definition
if (childrenDef != null)
{
if (childrenDef.Skip > 0)
{
query.Skip = childrenDef.Skip;
}
if (childrenDef.Top > 0)
{
query.Top = childrenDef.Top;
}
if (childrenDef.Sort != null)
{
query.SetSort(childrenDef.Sort);
}
if (childrenDef.CountAllPages != null)
{
query.CountAllPages = childrenDef.CountAllPages.Value;
}
if (childrenDef.EnableAutofilters != FilterStatus.Default)
{
query.EnableAutofilters = childrenDef.EnableAutofilters;
}
if (childrenDef.EnableLifespanFilter != FilterStatus.Default)
{
query.EnableLifespanFilter = childrenDef.EnableLifespanFilter;
}
if (childrenDef.QueryExecutionMode != QueryExecutionMode.Default)
{
query.QueryExecutionMode = childrenDef.QueryExecutionMode;
}
}
// #7 configuring query by additional query clause (the biggest priority)
if (lq != null)
{
if (lq.Skip > 0)
{
query.Skip = lq.Skip;
}
if (lq.Top > 0)
{
query.Top = lq.Top;
}
if (lq.SortFields != null && lq.SortFields.Length > 0)
{
query.SortFields = lq.SortFields;
}
if (lq.EnableAutofilters != FilterStatus.Default)
{
query.EnableAutofilters = lq.EnableAutofilters;
}
if (lq.EnableLifespanFilter != FilterStatus.Default)
{
query.EnableLifespanFilter = lq.EnableLifespanFilter;
}
if (lq.QueryExecutionMode != QueryExecutionMode.Default)
{
query.QueryExecutionMode = lq.QueryExecutionMode;
}
}
return(query);
}
private Query VisitBooleanMemberQuery(CQVisitor.BooleanMemberQuery boolMemberQ)
{
return(CQVisitor.CreateTermQuery(boolMemberQ.FieldName, boolMemberQ.Value));
}