public CloneContext (QuerySourceMapping querySourceMapping)
{
ArgumentUtility.CheckNotNull ("querySourceMapping", querySourceMapping);
QuerySourceMapping = querySourceMapping;
}
public CloneContext(QuerySourceMapping querySourceMapping)
{
ArgumentUtility.CheckNotNull("querySourceMapping", querySourceMapping);
QuerySourceMapping = querySourceMapping;
}
protected virtual void FlattenSubQuery (
SubQueryExpression subQueryExpression, FromClauseBase fromClause, QueryModel queryModel, int destinationIndex)
{
ArgumentUtility.CheckNotNull ("subQueryExpression", subQueryExpression);
ArgumentUtility.CheckNotNull ("fromClause", fromClause);
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
CheckFlattenable (subQueryExpression.QueryModel);
var innerMainFromClause = subQueryExpression.QueryModel.MainFromClause;
CopyFromClauseData (innerMainFromClause, fromClause);
var innerSelectorMapping = new QuerySourceMapping();
innerSelectorMapping.AddMapping (fromClause, subQueryExpression.QueryModel.SelectClause.Selector);
queryModel.TransformExpressions (ex => ReferenceReplacingExpressionTreeVisitor.ReplaceClauseReferences (ex, innerSelectorMapping, false));
InsertBodyClauses (subQueryExpression.QueryModel.BodyClauses, queryModel, destinationIndex);
var innerBodyClauseMapping = new QuerySourceMapping();
innerBodyClauseMapping.AddMapping (innerMainFromClause, new QuerySourceReferenceExpression (fromClause));
queryModel.TransformExpressions (ex => ReferenceReplacingExpressionTreeVisitor.ReplaceClauseReferences (ex, innerBodyClauseMapping, false));
}
/// <summary>
/// Clones this <see cref="QueryModel"/>, returning a new <see cref="QueryModel"/> equivalent to this instance, but with its clauses being
/// clones of this instance's clauses. Any <see cref="QuerySourceReferenceExpression"/> in the cloned clauses that points back to another clause
/// in this <see cref="QueryModel"/> (including its subqueries) is adjusted to point to the respective clones in the cloned
/// <see cref="QueryModel"/>. Any subquery nested in the <see cref="QueryModel"/> is also cloned.
/// </summary>
/// <param name="querySourceMapping">The <see cref="QuerySourceMapping"/> defining how to adjust instances of
/// <see cref="QuerySourceReferenceExpression"/> in the cloned <see cref="QueryModel"/>. If there is a <see cref="QuerySourceReferenceExpression"/>
/// that points out of the <see cref="QueryModel"/> being cloned, specify its replacement via this parameter. At the end of the cloning process,
/// this object maps all the clauses in this original <see cref="QueryModel"/> to the clones created in the process.
/// </param>
public QueryModel Clone (QuerySourceMapping querySourceMapping)
{
ArgumentUtility.CheckNotNull ("querySourceMapping", querySourceMapping);
var cloneContext = new CloneContext (querySourceMapping);
var queryModelBuilder = new QueryModelBuilder();
queryModelBuilder.AddClause (MainFromClause.Clone (cloneContext));
foreach (var bodyClause in BodyClauses)
queryModelBuilder.AddClause (bodyClause.Clone (cloneContext));
queryModelBuilder.AddClause (SelectClause.Clone (cloneContext));
foreach (var resultOperator in ResultOperators)
{
var resultOperatorClone = resultOperator.Clone (cloneContext);
queryModelBuilder.AddResultOperator (resultOperatorClone);
}
var clone = queryModelBuilder.Build ();
clone.TransformExpressions (ex => CloningExpressionTreeVisitor.AdjustExpressionAfterCloning (ex, cloneContext.QuerySourceMapping));
clone.ResultTypeOverride = ResultTypeOverride;
return clone;
}