private QueryModelVisitor(VisitorParameters visitorParameters, bool root, QueryModel queryModel)
{
VisitorParameters = visitorParameters;
Model = queryModel;
_hqlTree = new IntermediateHqlTree(root);
}
public SelectClauseVisitor(System.Type inputType, VisitorParameters parameters, IEnumerable <Expression> groupByKeys)
{
_inputParameter = Expression.Parameter(inputType, "input");
_parameters = parameters;
_hqlVisitor = new HqlGeneratorExpressionTreeVisitor(_parameters);
_hqlNodes = new HashSet <Expression>(groupByKeys);
}
private QueryModelVisitor(VisitorParameters visitorParameters, bool root, QueryModel queryModel,
NhLinqExpressionReturnType?rootReturnType)
{
VisitorParameters = visitorParameters;
Model = queryModel;
_rootReturnType = root ? rootReturnType : null;
_hqlTree = new IntermediateHqlTree(root);
}
public IASTNode Translate(ISessionFactoryImplementor sessionFactory)
{
var requiredHqlParameters = new List<NamedParameterDescriptor>();
var querySourceNamer = new QuerySourceNamer();
var queryModel = NhRelinqQueryParser.Parse(_expression);
var visitorParameters = new VisitorParameters(sessionFactory, _constantToParameterMap, requiredHqlParameters, querySourceNamer);
ExpressionToHqlTranslationResults = QueryModelVisitor.GenerateHqlQuery(queryModel, visitorParameters, true);
ParameterDescriptors = requiredHqlParameters.AsReadOnly();
return ExpressionToHqlTranslationResults.Statement.AstNode;
}
public static ExpressionToHqlTranslationResults GenerateHqlQuery(QueryModel queryModel, VisitorParameters parameters, bool root)
{
NestedSelectRewriter.ReWrite(queryModel, parameters.SessionFactory);
// Remove unnecessary body operators
RemoveUnnecessaryBodyOperators.ReWrite(queryModel);
// Merge aggregating result operators (distinct, count, sum etc) into the select clause
MergeAggregatingResultsRewriter.ReWrite(queryModel);
// Swap out non-aggregating group-bys
NonAggregatingGroupByRewriter.ReWrite(queryModel);
// Rewrite aggregate group-by statements
AggregatingGroupByRewriter.ReWrite(queryModel);
// Rewrite aggregating group-joins
AggregatingGroupJoinRewriter.ReWrite(queryModel);
// Rewrite non-aggregating group-joins
NonAggregatingGroupJoinRewriter.ReWrite(queryModel);
SubQueryFromClauseFlattener.ReWrite(queryModel);
// Rewrite left-joins
LeftJoinRewriter.ReWrite(queryModel);
// Rewrite paging
PagingRewriter.ReWrite(queryModel);
// Flatten pointless subqueries
QueryReferenceExpressionFlattener.ReWrite(queryModel);
// Add joins for references
AddJoinsReWriter.ReWrite(queryModel, parameters.SessionFactory);
// Move OrderBy clauses to end
MoveOrderByToEndRewriter.ReWrite(queryModel);
// rewrite any operators that should be applied on the outer query
// by flattening out the sub-queries that they are located in
var result = ResultOperatorRewriter.Rewrite(queryModel);
// Identify and name query sources
QuerySourceIdentifier.Visit(parameters.QuerySourceNamer, queryModel);
var visitor = new QueryModelVisitor(parameters, root, queryModel) { RewrittenOperatorResult = result };
visitor.Visit();
return visitor._hqlTree.GetTranslation();
}
public QueryModelVisitorBase CreateVisitor(VisitorParameters parameters)
{
return new CustomVisitor();
}
public static HqlTreeNode Visit(Expression expression, VisitorParameters parameters)
{
return(new HqlGeneratorExpressionVisitor(parameters).VisitExpression(expression));
}
public SelectClauseHqlNominator(VisitorParameters parameters)
{
_functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
}
public HqlGeneratorExpressionTreeVisitor(VisitorParameters parameters)
{
_functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
_parameters = parameters;
}
public SelectClauseVisitor(System.Type inputType, VisitorParameters parameters)
{
_inputParameter = Expression.Parameter(inputType, "input");
_parameters = parameters;
_hqlVisitor = new HqlGeneratorExpressionTreeVisitor(_parameters);
}
public HqlGeneratorExpressionVisitor(VisitorParameters parameters)
{
_functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
_parameters = parameters;
_nullableExpressionDetector = new NullableExpressionDetector(_parameters.SessionFactory, _functionRegistry);
}
public HqlGeneratorExpressionTreeVisitor(VisitorParameters parameters)
{
_parameters = parameters;
_hqlTreeBuilder = new HqlTreeBuilder();
}
public EqualityHqlGenerator(VisitorParameters parameters)
{
_parameters = parameters;
_hqlTreeBuilder = new HqlTreeBuilder();
}
public static ExpressionToHqlTranslationResults GenerateHqlQuery(QueryModel queryModel, VisitorParameters parameters, bool root)
{
// Remove unnecessary body operators
RemoveUnnecessaryBodyOperators.ReWrite(queryModel);
// Merge aggregating result operators (distinct, count, sum etc) into the select clause
MergeAggregatingResultsRewriter.ReWrite(queryModel);
// Rewrite aggregate group-by statements
AggregatingGroupByRewriter.ReWrite(queryModel);
// Swap out non-aggregating group-bys
NonAggregatingGroupByRewriter.ReWrite(queryModel);
// Rewrite aggregating group-joins
AggregatingGroupJoinRewriter.ReWrite(queryModel);
// Rewrite non-aggregating group-joins
NonAggregatingGroupJoinRewriter.ReWrite(queryModel);
// Flatten pointless subqueries
QueryReferenceExpressionFlattener.ReWrite(queryModel);
// Add left joins for references
AddLeftJoinsReWriter.ReWrite(queryModel, parameters.SessionFactory);
var visitor = new QueryModelVisitor(parameters, root, queryModel);
visitor.Visit();
return(visitor._hqlTree.GetTranslation());
}
public SelectClauseVisitor(System.Type inputType, VisitorParameters parameters)
{
functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
_inputParameter = Expression.Parameter(inputType, "input");
_parameters = parameters;
}
public static HqlTreeNode Visit(Expression expression, VisitorParameters parameters)
{
var visitor = new HqlGeneratorExpressionTreeVisitor(parameters);
return(visitor.VisitExpression(expression));
}
public SelectClauseVisitor(System.Type inputType, VisitorParameters parameters)
{
_inputParameter = Expression.Parameter(inputType, "input");
_parameters = parameters;
_hqlVisitor = new HqlGeneratorExpressionTreeVisitor(_parameters);
}
public HqlGeneratorExpressionTreeVisitor(VisitorParameters parameters)
{
functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
_parameters = parameters;
_hqlTreeBuilder = new HqlTreeBuilder();
}
public EqualityHqlGenerator(VisitorParameters parameters)
{
_parameters = parameters;
_hqlTreeBuilder = new HqlTreeBuilder();
}
public SelectClauseVisitor(System.Type inputType, VisitorParameters parameters)
{
functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
_inputParameter = Expression.Parameter(inputType, "input");
_parameters = parameters;
}
public static HqlTreeNode Visit(Expression expression, VisitorParameters parameters)
{
return new HqlGeneratorExpressionTreeVisitor(parameters).VisitExpression(expression);
}
public HqlGeneratorExpressionTreeVisitor(VisitorParameters parameters)
{
functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
_parameters = parameters;
_hqlTreeBuilder = new HqlTreeBuilder();
}
public SelectClauseHqlNominator(VisitorParameters parameters)
{
_functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
}
public SelectClauseVisitor(System.Type inputType, VisitorParameters parameters)
{
_inputParameter = Expression.Parameter(inputType, "input");
_parameters = parameters;
}
public static ExpressionToHqlTranslationResults GenerateHqlQuery(QueryModel queryModel, VisitorParameters parameters, bool root,
NhLinqExpressionReturnType?rootReturnType)
{
// Expand conditionals in subquery FROM clauses into multiple subqueries
if (root)
{
// This expander works recursively
SubQueryConditionalExpander.ReWrite(queryModel);
}
NestedSelectRewriter.ReWrite(queryModel, parameters.SessionFactory);
// Remove unnecessary body operators
RemoveUnnecessaryBodyOperators.ReWrite(queryModel);
// Merge aggregating result operators (distinct, count, sum etc) into the select clause
MergeAggregatingResultsRewriter.ReWrite(queryModel);
// Swap out non-aggregating group-bys
NonAggregatingGroupByRewriter.ReWrite(queryModel);
// Rewrite aggregate group-by statements
AggregatingGroupByRewriter.ReWrite(queryModel);
// Rewrite aggregating group-joins
AggregatingGroupJoinRewriter.ReWrite(queryModel);
// Rewrite non-aggregating group-joins
NonAggregatingGroupJoinRewriter.ReWrite(queryModel);
SubQueryFromClauseFlattener.ReWrite(queryModel);
// Rewrite left-joins
LeftJoinRewriter.ReWrite(queryModel);
// Rewrite paging
PagingRewriter.ReWrite(queryModel);
// Flatten pointless subqueries
QueryReferenceExpressionFlattener.ReWrite(queryModel);
// Flatten array index access to query references
ArrayIndexExpressionFlattener.ReWrite(queryModel);
// Add joins for references
AddJoinsReWriter.ReWrite(queryModel, parameters);
// Expand coalesced and conditional joins to their logical equivalents
ConditionalQueryReferenceExpander.ReWrite(queryModel);
// Move OrderBy clauses to end
MoveOrderByToEndRewriter.ReWrite(queryModel);
// Give a rewriter provided by the session factory a chance to
// rewrite the query.
var rewriterFactory = parameters.SessionFactory.Settings.QueryModelRewriterFactory;
if (rewriterFactory != null)
{
var customVisitor = rewriterFactory.CreateVisitor(parameters);
if (customVisitor != null)
{
customVisitor.VisitQueryModel(queryModel);
}
}
// rewrite any operators that should be applied on the outer query
// by flattening out the sub-queries that they are located in
var result = ResultOperatorRewriter.Rewrite(queryModel);
// Identify and name query sources
QuerySourceIdentifier.Visit(parameters.QuerySourceNamer, queryModel);
var visitor = new QueryModelVisitor(parameters, root, queryModel, rootReturnType)
{
RewrittenOperatorResult = result,
};
visitor.Visit();
return(visitor._hqlTree.GetTranslation());
}
private QueryModelVisitor(VisitorParameters visitorParameters, bool root, QueryModel queryModel)
{
VisitorParameters = visitorParameters;
Model = queryModel;
_hqlTree = new IntermediateHqlTree(root);
}
public static ExpressionToHqlTranslationResults GenerateHqlQuery(QueryModel queryModel, VisitorParameters parameters, bool root)
{
NestedSelectRewriter.ReWrite(queryModel, parameters.SessionFactory);
// Remove unnecessary body operators
RemoveUnnecessaryBodyOperators.ReWrite(queryModel);
// Merge aggregating result operators (distinct, count, sum etc) into the select clause
MergeAggregatingResultsRewriter.ReWrite(queryModel);
// Swap out non-aggregating group-bys
NonAggregatingGroupByRewriter.ReWrite(queryModel);
// Rewrite aggregate group-by statements
AggregatingGroupByRewriter.ReWrite(queryModel);
// Rewrite aggregating group-joins
AggregatingGroupJoinRewriter.ReWrite(queryModel);
// Rewrite non-aggregating group-joins
NonAggregatingGroupJoinRewriter.ReWrite(queryModel);
SubQueryFromClauseFlattener.ReWrite(queryModel);
// Rewrite left-joins
LeftJoinRewriter.ReWrite(queryModel);
// Rewrite paging
PagingRewriter.ReWrite(queryModel);
// Flatten pointless subqueries
QueryReferenceExpressionFlattener.ReWrite(queryModel);
// Add joins for references
AddJoinsReWriter.ReWrite(queryModel, parameters.SessionFactory);
// Move OrderBy clauses to end
MoveOrderByToEndRewriter.ReWrite(queryModel);
// rewrite any operators that should be applied on the outer query
// by flattening out the sub-queries that they are located in
var result = ResultOperatorRewriter.Rewrite(queryModel);
// Identify and name query sources
QuerySourceIdentifier.Visit(parameters.QuerySourceNamer, queryModel);
var visitor = new QueryModelVisitor(parameters, root, queryModel)
{
RewrittenOperatorResult = result
};
visitor.Visit();
return(visitor._hqlTree.GetTranslation());
}
public SelectClauseVisitor(System.Type inputType, VisitorParameters parameters)
{
_inputParameter = Expression.Parameter(inputType, "input");
_parameters = parameters;
}
public HqlGeneratorExpressionVisitor(VisitorParameters parameters)
{
_functionRegistry = parameters.SessionFactory.Settings.LinqToHqlGeneratorsRegistry;
_parameters = parameters;
}
public static void ReWrite(QueryModel queryModel, VisitorParameters parameters)
{
var visitor = new AddJoinsReWriter(parameters.SessionFactory, queryModel);
visitor.VisitQueryModel(queryModel);
}
