/// <summary>
/// Initializes a new instance of the <see cref="Artefacts.Service.ClientQueryProvider`1"/> class.
/// </summary>
/// <param name="repository">Repository.</param>
/// <param name="visitor">Visitor.</param>
public ClientQueryProvider(IRepository repository, ExpressionVisitor visitor = null)
{
if (repository == null)
throw new ArgumentNullException("repository");
Repository = repository;
_clientProxy = new RepositoryClientProxy(new NetTcpBinding(SecurityMode.None), "net.tcp://localhost:3334/ArtefactRepository");
}
public static Dictionary<string, FNode> BuildParameters(ExpressionVisitor Evaluator, HScriptParser.Bind_element_setContext context)
{
Dictionary<string, FNode> parameters = new Dictionary<string, FNode>();
if (context == null)
return parameters;
foreach (HScriptParser.Bind_elementContext ctx in context.bind_element())
{
string key = ctx.SCALAR().GetText();
bool is_dynamic =
(ctx.K_STATIC() == null)
? true
: false;
FNode value =
(is_dynamic)
? Evaluator.ToNode(ctx.expression())
: new FNodeValue(null, new Cell(ctx.expression().GetText(), false));
parameters.Add(key, value);
}
return parameters;
}
private static Expression ParseTokens(CommonTokenStream input)
{
ExpressionParser.ExpressionContext startContext = new ExpressionParser(input).expression();
ExpressionVisitor visit = new ExpressionVisitor();
Expression expr = visit.Visit(startContext);
return expr;
}
// Reads //
public static StagedReadName RenderStagedReadPlan(Workspace Home, HScriptParser.Crudam_readContext context)
{
// Get the data source //
DataSet data = VisitorHelper.GetData(Home, context.full_table_name());
string alias =
(context.K_AS() != null)
? context.IDENTIFIER().GetText()
: data.Name;
// Create a local heap to work off of //
MemoryStruct local_heap = new MemoryStruct(true);
// Create a record register //
StreamRegister memory = new StreamRegister(null);
// Create expression visitor //
ExpressionVisitor exp_vis = new ExpressionVisitor(local_heap, Home, alias, data.Columns, memory);
// Where clause //
Predicate where = VisitorHelper.GetWhere(exp_vis, context.where_clause());
// Create a reader //
RecordReader reader = data.OpenReader(where);
// Attach the reader to the register //
memory.BaseStream = reader;
// Create the action visitor //
ActionVisitor act_vis = new ActionVisitor(Home, local_heap, exp_vis);
// Get the declarations //
if (context.crudam_declare_many() != null)
{
VisitorHelper.AllocateMemory(Home, local_heap, exp_vis, context.crudam_declare_many());
}
// Get the initial actionset //
TNode pre_run =
(context.init_action() != null)
? act_vis.ToNode(context.init_action().query_action())
: new TNodeNothing(null);
// Get the main actionset //
TNode run = act_vis.ToNode(context.main_action().query_action());
// Get the final actionset //
TNode post_run =
(context.final_action() != null)
? act_vis.ToNode(context.final_action().query_action())
: new TNodeNothing(null);
return new StagedReadName(reader, pre_run, run, post_run);
}
protected override Expression Accept(ExpressionVisitor visitor)
{
return(base.Accept(visitor));
}
/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
protected internal override Expression Accept(ExpressionVisitor visitor) {
return visitor.VisitMethodCall(this);
}
/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
protected internal override Expression Accept(ExpressionVisitor visitor) {
return visitor.VisitNewArray(this);
}
// Partitions //
public static int GetPartitions(ExpressionVisitor Evaluator, HScriptParser.PartitionsContext context)
{
// Null then assume 1 partition //
if (context == null)
return 1;
// If the expression is null, then max out cores //
if (context.expression() == null)
return Environment.ProcessorCount;
// Otherwise, get the value //
int cnt = (int)Evaluator.ToNode(context.expression()).Evaluate().valueINT;
// Bound it //
cnt = Math.Min(cnt, Environment.ProcessorCount * 2);
cnt = Math.Max(cnt, 1);
return cnt;
}
private static void AppendSet(ExpressionVisitor Evaluator, FNodeSet Fields, HScriptParser.EOW_table_starContext context)
{
string alias = context.IDENTIFIER()[0].GetText();
if (!Evaluator.Columns.ContainsKey(alias))
throw new Exception(string.Format("Alias '{0}' does not exist", alias));
FNodeSet nodes = new FNodeSet(Evaluator.Columns[alias]);
nodes.AssignRegister(Evaluator.Registers[alias]);
string suffix = (context.K_AS() == null) ? null : context.IDENTIFIER()[1].GetText();
for (int i = 0; i < nodes.Count; i++)
{
Fields.Add((suffix == null) ? nodes.Alias(i) : suffix + nodes.Alias(i), nodes[i]);
}
}
public static void AllocateMemory(Workspace Home, MemoryStruct Heap, ExpressionVisitor Evaluator, HScriptParser.Crudam_declare_manyContext context)
{
foreach (HScriptParser.Declare_genericContext ctx in context.declare_generic())
{
AllocateMemory(Home, Heap, Evaluator, ctx);
}
}
protected override Expression VisitChildren(ExpressionVisitor visitor) => Update((SqlExpression)visitor.Visit(Expression));
public override T Accept <T>(ExpressionVisitor <T> v)
{
return(v.VisitPointerAddition(this));
}
public override T Accept <T, C>(ExpressionVisitor <T, C> v, C context)
{
return(v.VisitPointerAddition(this, context));
}
public override T Accept <T>(ExpressionVisitor <T> v)
{
return(v.VisitProcedureConstant(this));
}
public override T Accept <T, C>(ExpressionVisitor <T, C> v, C context)
{
return(v.VisitProcedureConstant(this, context));
}
public override T Accept <T>(ExpressionVisitor <T> v)
{
return(v.VisitApplication(this));
}
public override T Accept <T, C>(ExpressionVisitor <T, C> v, C context)
{
return(v.VisitApplication(this, context));
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
protected override Expression VisitChildren(ExpressionVisitor visitor)
{
Check.NotNull(visitor, nameof(visitor));
var changed = false;
var projections = new List <ProjectionExpression>();
IDictionary <ProjectionMember, Expression> projectionMapping;
if (Projection.Any())
{
projectionMapping = _projectionMapping;
foreach (var item in Projection)
{
var projection = (ProjectionExpression)visitor.Visit(item);
projections.Add(projection);
changed |= projection != item;
}
}
else
{
projectionMapping = new Dictionary <ProjectionMember, Expression>();
foreach (var mapping in _projectionMapping)
{
var newProjection = visitor.Visit(mapping.Value);
changed |= newProjection != mapping.Value;
projectionMapping[mapping.Key] = newProjection;
}
}
var fromExpression = (RootReferenceExpression)visitor.Visit(FromExpression);
changed |= fromExpression != FromExpression;
var predicate = (SqlExpression)visitor.Visit(Predicate);
changed |= predicate != Predicate;
var orderings = new List <OrderingExpression>();
foreach (var ordering in _orderings)
{
var orderingExpression = (SqlExpression)visitor.Visit(ordering.Expression);
changed |= orderingExpression != ordering.Expression;
orderings.Add(ordering.Update(orderingExpression));
}
var offset = (SqlExpression)visitor.Visit(Offset);
changed |= offset != Offset;
var limit = (SqlExpression)visitor.Visit(Limit);
changed |= limit != Limit;
if (changed)
{
var newSelectExpression = new SelectExpression(projections, fromExpression, orderings)
{
_projectionMapping = projectionMapping,
Predicate = predicate,
Offset = offset,
Limit = limit,
IsDistinct = IsDistinct
};
return(newSelectExpression);
}
return(this);
}
public static void AllocateMemory(Workspace Home, MemoryStruct Heap, ExpressionVisitor Evaluator, HScriptParser.DeclareMatrixLiteralContext context)
{
string name = context.IDENTIFIER().GetText();
CellAffinity type = GetAffinity(context.type());
MatrixVisitor vis = new MatrixVisitor(Home, Heap, Evaluator);
CellMatrix mat = vis.ToMatrix(context.matrix_expression()).Evaluate();
Heap.Arrays.Reallocate(name, mat);
}
//////////////////////////////////////////////
#region BoundVariableExpression Members
public override Expression visit(ExpressionVisitor v)
{
return(v.visit(this));
}
// Expression or wildcard handelers //
private static void AppendSet(ExpressionVisitor Evaluator, FNodeSet Fields, HScriptParser.EOW_expressionContext context)
{
FNode node = Evaluator.ToNode(context.expression_alias().expression());
string alias = ("F" + Fields.Count.ToString());
if (node.Name != null)
alias = node.Name;
if (context.expression_alias().K_AS() != null)
alias = context.expression_alias().IDENTIFIER().GetText();
Fields.Add(alias, node);
}
/// <inheritdoc /> protected override Expression Accept(ExpressionVisitor visitor) => visitor is NpgsqlQuerySqlGenerator npgsqlGenerator
private static void AppendSet(ExpressionVisitor Evaluator, FNodeSet Fields, HScriptParser.Expression_or_wildcardContext context)
{
if (context is HScriptParser.EOW_expressionContext)
{
AppendSet(Evaluator, Fields, context as HScriptParser.EOW_expressionContext);
return;
}
if (context is HScriptParser.EOW_local_starContext)
{
AppendSet(Evaluator, Fields, context as HScriptParser.EOW_local_starContext);
return;
}
if (context is HScriptParser.EOW_global_starContext)
{
AppendSet(Evaluator, Fields, context as HScriptParser.EOW_global_starContext);
return;
}
if (context is HScriptParser.EOW_table_starContext)
{
AppendSet(Evaluator, Fields, context as HScriptParser.EOW_table_starContext);
return;
}
if (context is HScriptParser.EOW_tables_starContext)
{
AppendSet(Evaluator, Fields, context as HScriptParser.EOW_tables_starContext);
return;
}
}
public override void Accept(ExpressionVisitor vis)
{
vis.Visit(this);
}
public override void OnAfterCall(Identifier stackReg, ProcedureSignature sigCallee, ExpressionVisitor<Expression> eval)
{
throw new NotImplementedException();
}
public override void Accept(ExpressionVisitor expressionVisitor)
{
expressionVisitor.Visit(this);
}
public override void Visit(ExpressionVisitor visitor)
{
visitor.Visit(this);
}
/// <summary> /// Reduces the node and then calls the visitor delegate on the reduced expression. /// The method throws an exception if the node is not /// reducible. /// </summary> /// <returns> /// The expression being visited, or an expression which should replace it in the tree. /// </returns> /// <param name="visitor">An instance of <see cref="T:System.Func`2" />.</param> protected override Expression VisitChildren(ExpressionVisitor visitor) => Update(visitor.Visit(Caller), visitor.Visit(AccessOperation));
public override Expression Accept(ExpressionVisitor visitor)
{
return visitor.VisitParameter(this);
}
public override void OnAfterCall(Identifier sp, ProcedureSignature sigCallee, ExpressionVisitor <Expression> eval)
{
var spReg = (RegisterStorage)sp.Storage;
var spVal = GetValue(spReg);
var stackOffset = SetValue(
spReg,
new BinaryExpression(
Operator.IAdd,
spVal.DataType,
sp,
Constant.Create(
PrimitiveType.CreateWord(spReg.DataType.Size),
sigCallee.StackDelta)).Accept(eval));
if (stackOffset.IsValid)
{
if (stackOffset.ToInt32() > 0)
{
ErrorListener("Possible stack underflow detected.");
}
}
}
/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
protected internal override Expression Accept(ExpressionVisitor visitor) {
return visitor.VisitInvocation(this);
}
// Heap allocations //
public static void AllocateMemory(Workspace Home, MemoryStruct Heap, ExpressionVisitor Evaluator, HScriptParser.DeclareScalarContext context)
{
string name = context.IDENTIFIER().GetText();
CellAffinity type = GetAffinity(context.type());
Cell value = (context.ASSIGN() != null) ? Evaluator.ToNode(context.expression()).Evaluate() : new Cell(type);
Heap.Scalars.Reallocate(name, value);
}
protected override Expression VisitChildren(ExpressionVisitor visitor)
{
QueryExpression = visitor.Visit(QueryExpression);
return(this);
}
/// <inheritdoc /> protected override Expression VisitChildren(ExpressionVisitor visitor) => Update((SqlExpression)visitor.Visit(Array), (SqlExpression)visitor.Visit(Index));
public override void OnAfterCall(Identifier sp, ProcedureSignature sigCallee, ExpressionVisitor<Expression> eval)
{
}
public void Accept(ExpressionVisitor vis)
{
vis.Visit(this);
}
public static void AllocateMemory(Workspace Home, MemoryStruct Heap, ExpressionVisitor Evaluator, HScriptParser.DeclareMatrix2DContext context)
{
string name = context.IDENTIFIER().GetText();
CellAffinity type = GetAffinity(context.type());
int rows = (int)Evaluator.ToNode(context.expression()[0]).Evaluate().valueINT;
int cols = (int)Evaluator.ToNode(context.expression()[1]).Evaluate().valueINT;
CellMatrix mat = new CellMatrix(rows, cols, type);
Heap.Arrays.Reallocate(name, mat);
}
public R Accept <R>(ExpressionVisitor <R> vis)
{
return(vis.Visit(this));
}
public static void AllocateMemory(Workspace Home, MemoryStruct Heap, ExpressionVisitor Evaluator, HScriptParser.Declare_genericContext context)
{
if (context is HScriptParser.DeclareScalarContext)
{
VisitorHelper.AllocateMemory(Home, Heap, Evaluator, context as HScriptParser.DeclareScalarContext);
return;
}
if (context is HScriptParser.DeclareMatrix1DContext)
{
VisitorHelper.AllocateMemory(Home, Heap, Evaluator, context as HScriptParser.DeclareMatrix1DContext);
return;
}
if (context is HScriptParser.DeclareMatrix2DContext)
{
VisitorHelper.AllocateMemory(Home, Heap, Evaluator, context as HScriptParser.DeclareMatrix2DContext);
return;
}
if (context is HScriptParser.DeclareMatrixLiteralContext)
{
VisitorHelper.AllocateMemory(Home, Heap, Evaluator, context as HScriptParser.DeclareMatrixLiteralContext);
return;
}
}
public override TResult Accept <TResult, TContext>(ExpressionVisitor <TResult, TContext> visitor, TContext ctx)
{
return(visitor.VisitVariable(ctx, this));
}
// Where clause //
public static Predicate GetWhere(ExpressionVisitor Evaluator, HScriptParser.Where_clauseContext context)
{
if (context == null)
return Predicate.TrueForAll;
return Evaluator.ToPredicate(context.expression());
}
public override T Accept <T, C>(ExpressionVisitor <T, C> v, C context)
{
return(v.VisitOutArgument(this, context));
}
private static void AppendSet(ExpressionVisitor Evaluator, FNodeSet Fields, HScriptParser.EOW_global_starContext context)
{
string suffix =
(context.K_AS() == null)
? null
: context.IDENTIFIER().GetText();
for (int i = 0; i < Evaluator.GlobalHeap.Scalars.Count; i++)
{
string alias =
(suffix == null)
? Evaluator.LocalHeap.Scalars.Name(i)
: suffix + Evaluator.LocalHeap.Scalars.Name(i);
FNode node = new FNodeHeapRef(null, Evaluator.GlobalHeap, i);
Fields.Add(alias, node);
}
}
public override T Accept <T>(ExpressionVisitor <T> visitor)
{
return(visitor.VisitOutArgument(this));
}
private static void AppendSet(ExpressionVisitor Evaluator, FNodeSet Fields, HScriptParser.EOW_tables_starContext context)
{
if (Evaluator.Columns.Count == 0)
return; // no need to toss an exception
string alias = Evaluator.Columns.Keys.First();
FNodeSet nodes = new FNodeSet(Evaluator.Columns[alias]);
nodes.AssignRegister(Evaluator.Registers[alias]);
string suffix = (context.K_AS() == null) ? null : context.IDENTIFIER().GetText();
for (int i = 0; i < nodes.Count; i++)
{
Fields.Add((suffix == null) ? nodes.Alias(i) : suffix + nodes.Alias(i), nodes[i]);
}
}
/// <summary>
/// Reduces the node and then calls the <see cref="ExpressionVisitor.Visit(System.Linq.Expressions.Expression)" /> method passing the
/// reduced expression.
/// Throws an exception if the node isn't reducible.
/// </summary>
/// <param name="visitor"> An instance of <see cref="ExpressionVisitor" />. </param>
/// <returns> The expression being visited, or an expression which should replace it in the tree. </returns>
/// <remarks>
/// Override this method to provide logic to walk the node's children.
/// A typical implementation will call visitor.Visit on each of its
/// children, and if any of them change, should return a new copy of
/// itself with the modified children.
/// </remarks>
protected override Expression VisitChildren(ExpressionVisitor visitor)
{
visitor.Visit(_tableExpression);
return(this);
}
public static FNodeSet GetReturnStatement(ExpressionVisitor Evaluator, HScriptParser.Expression_or_wildcard_setContext context)
{
FNodeSet nodes = new FNodeSet();
foreach (HScriptParser.Expression_or_wildcardContext ctx in context.expression_or_wildcard())
AppendSet(Evaluator, nodes, ctx);
return nodes;
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
protected override Expression VisitChildren(ExpressionVisitor visitor)
{
Check.NotNull(visitor, nameof(visitor));
return(Update((SqlExpression)visitor.Visit(Expression)));
}
/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
protected internal override Expression Accept(ExpressionVisitor visitor) {
return visitor.VisitConstant(this);
}
protected override Expression VisitChildren(ExpressionVisitor visitor)
{
return(this);
}
/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
protected internal override Expression Accept(ExpressionVisitor visitor) {
return visitor.VisitRuntimeVariables(this);
}
/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
protected internal override Expression Accept(ExpressionVisitor visitor)
{
return(visitor.VisitLambda(this));
}
public abstract void Visit(ExpressionVisitor visitor);
protected override Expression VisitChildren(ExpressionVisitor visitor) => this;
protected internal override Expression Accept(ExpressionVisitor visitor) {
return visitor.VisitDebugInfo(this);
}
/// <inheritdoc />
protected override Expression VisitChildren(ExpressionVisitor visitor)
=> throw new InvalidOperationException(
CoreStrings.VisitIsNotAllowed($"{nameof(ShapedQueryExpression)}.{nameof(VisitChildren)}"));
public override void OnAfterCall(Identifier sp, ProcedureSignature sigCallee, ExpressionVisitor<Expression> eval)
{
var spReg = (RegisterStorage) sp.Storage;
var spVal = GetValue(spReg);
var stackOffset = SetValue(
spReg,
new BinaryExpression(
Operator.IAdd,
spVal.DataType,
sp,
Constant.Create(
PrimitiveType.CreateWord(spReg.DataType.Size),
sigCallee.StackDelta)).Accept(eval));
if (stackOffset.IsValid)
{
if (stackOffset.ToInt32() > 0)
ErrorListener("Possible stack underflow detected.");
}
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
protected override Expression VisitChildren(ExpressionVisitor visitor)
{
Check.NotNull(visitor, nameof(visitor));
return(this);
}
/// <summary>
/// Dispatches to the specific visit method for this node type.
/// </summary>
protected internal override Expression Accept(ExpressionVisitor visitor) {
return visitor.VisitTypeBinary(this);
}
protected override Expression Accept(ExpressionVisitor visitor)
{
return(visitor.Visit(Constant(_blockParam, typeof(BlockParam))));
}