/// <summary>
/// Visits a <see cref="DeclareJobStatement"/>.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <returns>
/// The node, or a new version of the node.
/// </returns>
protected internal override Node VisitDeclareJobStatement([NotNull] DeclareJobStatement node)
{
base.VisitDeclareJobStatement(node);
var context = Expression.Parameter(typeof(IExecutionContext), "context");
var replaceContext = GenericVisitor.Create((ExecutionContextExpression e) => context);
var expr = Expression.Convert(
Expression.NewArrayInit(
typeof(JobTrigger),
node.Triggers.Select(t =>
Expression.New(
typeof(JobTrigger).GetTypeInfo().DeclaredConstructors.First(),
replaceContext.Visit(this.data.ConvertToLinqExpression(t.Function)),
Expression.Constant(t.GetDisplay())))),
typeof(IEnumerable <JobTrigger>)).RewriteTasksToAsyncExpression();
if (!expr.Type.IsConstructedGenericType || expr.Type.GetGenericTypeDefinition() != typeof(Task <>))
{
var fromResult = typeof(Task).GetGenericMethod(nameof(Task.FromResult), (Type)null).MakeGenericMethod(typeof(IEnumerable <JobTrigger>));
expr = Expression.Call(null, fromResult, expr);
}
var factories = Expression.Lambda <Func <IExecutionContext, Task <IEnumerable <IJobTrigger> > > >(expr, context).Compile();
var plan = node.Statements.Count == 1
? this.data.GetQueryPlan(node.Statements[0])
: new CombinedQueryPlan(node.Statements.Select(this.data.GetQueryPlan));
this.data.SetQueryPlan(node, new DeclareJobPlan(node.Name, plan, factories));
return(base.VisitDeclareJobStatement(node));
}
/// <summary>
/// Visits a <see cref="DeclareJobStatement"/>.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <returns>
/// The node, or a new version of the node.
/// </returns>
protected internal virtual Node VisitDeclareJobStatement([NotNull] DeclareJobStatement node)
{
return(node.VisitChildren(this));
}
protected internal override Node VisitDeclareJobStatement([NotNull] DeclareJobStatement node)
{
this.Builder.Append($"DECLARE JOB {node.Name}");
return(node);
}
/// <summary>
/// Visits a <see cref="DeclareJobStatement"/>.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <returns>
/// The node, or a new version of the node.
/// </returns>
protected internal override Node VisitDeclareJobStatement(DeclareJobStatement node)
{
return(this.VisitImplementation(node) ?? base.VisitDeclareJobStatement(node));
}