/// <summary>Renders the clause in textual representation. </summary>
/// <param name="writer">to output to</param>
/// <param name="formatter">for NewLine-whitespace formatting</param>
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
foreach (OnInsertSplitStreamItem item in Items)
{
item.InsertInto.ToEPL(writer, formatter, true);
item.SelectClause.ToEPL(writer, formatter, true, false);
if (item.PropertySelects != null)
{
writer.Write(" from ");
ContainedEventSelect.ToEPL(writer, formatter, item.PropertySelects);
if (item.PropertySelectsStreamName != null)
{
writer.Write(" as ");
writer.Write(item.PropertySelectsStreamName);
}
}
if (item.WhereClause != null)
{
writer.Write(" where ");
item.WhereClause.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
}
if (!IsFirst)
{
writer.Write(" output all");
}
}
/// <summary>
/// Renders the clause in EPL.
/// </summary>
/// <param name="writer">to output to</param>
/// <param name="formatter">for NewLine-whitespace formatting</param>
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
formatter.BeginOnSet(writer);
UpdateClause.RenderEPLAssignments(writer, Assignments);
}
/// <summary>
/// Renders the clause in textual representation.
/// </summary>
/// <param name="writer">to output to</param>
/// <param name="formatter"></param>
public override void ToEPLStream(
TextWriter writer,
EPStatementFormatter formatter)
{
ToEPLProjectedStream(writer, formatter);
ToEPLViews(writer, Views);
}
/// <summary>
/// Rendering using the provided formatter.
/// </summary>
/// <param name="formatter">to use</param>
/// <returns>rendered string</returns>
public string ToEPL(EPStatementFormatter formatter)
{
var writer = new StringWriter();
ToEPL(formatter, writer);
return(writer.ToString());
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
string delimiter = "";
int childNum = 0;
foreach (PatternExpr child in Children)
{
writer.Write(delimiter);
child.ToEPL(writer, Precedence, formatter);
delimiter = " -> ";
if (OptionalMaxPerSubexpression != null && OptionalMaxPerSubexpression.Count > childNum)
{
var maxExpr = OptionalMaxPerSubexpression[childNum];
if (maxExpr != null)
{
var inner = new StringWriter();
maxExpr.ToEPL(inner, ExpressionPrecedenceEnum.MINIMUM);
delimiter = " -[" + inner.ToString() + "]> ";
}
}
childNum++;
}
}
/// <summary>Renders the clause in textual representation. </summary>
/// <param name="writer">to output to</param>
/// <param name="formatter">for NewLine-whitespace formatting</param>
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
formatter.BeginMergeWhenMatched(writer);
if (IsMatched)
{
writer.Write("when matched");
}
else
{
writer.Write("when not matched");
}
if (OptionalCondition != null)
{
writer.Write(" and ");
OptionalCondition.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
foreach (OnMergeMatchedAction action in Actions)
{
formatter.BeginMergeAction(writer);
action.ToEPL(writer);
}
}
/// <summary>
/// Renders the clause in textual representation.
/// </summary>
/// <param name="writer">to output to</param>
/// <param name="optionalWhereClause">where clause if present, or null</param>
/// <param name="formatter">for newline-whitespace formatting</param>
public void ToEPL(
TextWriter writer,
Expression optionalWhereClause,
EPStatementFormatter formatter)
{
formatter.BeginMerge(writer);
writer.Write("merge ");
writer.Write(WindowName);
if (OptionalAsName != null)
{
writer.Write(" as ");
writer.Write(OptionalAsName);
}
if (InsertNoMatch != null)
{
writer.Write(" ");
InsertNoMatch.ToEPL(writer);
}
else
{
if (optionalWhereClause != null)
{
formatter.BeginMergeWhere(writer);
writer.Write("where ");
optionalWhereClause.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
foreach (var item in MatchItems)
{
item.ToEPL(writer, formatter);
}
}
}
/// <summary>Renders the clause in textual representation. </summary>
/// <param name="writer">to output to</param>
/// <param name="formatter">for NewLine-whitespace formatting</param>
/// <param name="isTopLevel">to indicate if this insert-into-clause is inside other clauses.</param>
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter,
bool isTopLevel)
{
formatter.BeginInsertInto(writer, isTopLevel);
writer.Write("insert ");
if (StreamSelector != StreamSelector.ISTREAM_ONLY)
{
writer.Write(StreamSelector.GetEPL());
writer.Write(" ");
}
writer.Write("into ");
writer.Write(StreamName);
if (ColumnNames.Count > 0)
{
writer.Write("(");
string delimiter = "";
foreach (var name in ColumnNames)
{
writer.Write(delimiter);
writer.Write(name);
delimiter = ", ";
}
writer.Write(")");
}
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
writer.Write("not ");
Children[0].ToEPL(writer, Precedence, formatter);
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
HashFunction?.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
writer.Write(" from ");
Filter.ToEPL(writer, formatter);
}
/// <summary>RenderAny as EPL. </summary>
/// <param name="writer">to output to</param>
/// <param name="formatter">formatter</param>
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
writer.Write("create context ");
writer.Write(ContextName);
writer.Write(" as ");
Descriptor.ToEPL(writer, formatter);
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
writer.Write("group ");
Expression.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
writer.Write(" as ");
writer.Write(Label);
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
Filter.ToEPL(writer, formatter);
if (OptionalAsName != null)
{
writer.Write(" as ");
writer.Write(OptionalAsName);
}
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
if (IsNow)
{
writer.Write("@now and");
}
writer.Write("after ");
TimePeriod.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
string delimiter = "";
foreach (PatternExpr child in Children)
{
writer.Write(delimiter);
child.ToEPL(writer, Precedence, formatter);
delimiter = " or ";
}
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
if ((Children == null) || (Children.Count == 0))
{
return;
}
PatternExpr patternExpr = Children[0];
patternExpr?.ToEPL(writer, Precedence, formatter);
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
if (Single != null)
{
writer.Write("[");
Single.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
writer.Write("]");
}
else
{
if (Low != null || High != null)
{
writer.Write("[");
if ((Low != null) && (High != null))
{
Low.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
writer.Write(":");
High.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
else if (Low != null)
{
Low.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
writer.Write(":");
}
else
{
writer.Write(":");
High.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
writer.Write("] ");
}
}
PatternExprPrecedenceEnum precedence = Precedence;
if (Children[0] is PatternMatchUntilExpr)
{
precedence = PatternExprPrecedenceEnum.MAXIMIM;
}
Children[0].ToEPL(writer, precedence, formatter);
if (Children.Count > 1)
{
writer.Write(" until ");
Children[1].ToEPL(writer, Precedence, formatter);
}
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
writer.Write("every ");
PatternExprPrecedenceEnum precedence = Precedence;
if (Children[0] is PatternEveryExpr)
{
precedence = PatternExprPrecedenceEnum.MAXIMIM;
}
Children[0].ToEPL(writer, precedence, formatter);
}
public virtual void ToEPL(
TextWriter writer,
PatternExprPrecedenceEnum parentPrecedence,
EPStatementFormatter formatter)
{
if (Precedence.GetLevel() < parentPrecedence.GetLevel())
{
writer.Write("(");
ToPrecedenceFreeEPL(writer, formatter);
writer.Write(")");
}
else
{
ToPrecedenceFreeEPL(writer, formatter);
}
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
string delimiter = "";
foreach (CreateContextClause context in Contexts)
{
writer.Write(delimiter);
writer.Write("context ");
writer.Write(context.ContextName);
writer.Write(" as ");
context.Descriptor.ToEPL(writer, formatter);
delimiter = ", ";
}
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
string delimiter = "";
foreach (ContextDescriptorCategoryItem item in Items)
{
writer.Write(delimiter);
item.ToEPL(writer, formatter);
delimiter = ", ";
}
writer.Write(" from ");
Filter.ToEPL(writer, formatter);
}
/// <summary>
/// Renders the clause in textual representation.
/// </summary>
/// <param name="writer">to output to</param>
/// <param name="formatter">for NewLine-whitespace formatting</param>
/// <param name="isTopLevel">to indicate if this select-clause is inside other clauses.</param>
/// <param name="andDelete">indicator whether select and delete.</param>
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter,
bool isTopLevel,
bool andDelete)
{
formatter.BeginSelect(writer, isTopLevel);
writer.Write("select ");
if (andDelete)
{
writer.Write("and delete ");
}
if (IsDistinct)
{
writer.Write("distinct ");
}
if (_streamSelector == StreamSelector.ISTREAM_ONLY)
{
// the default, no action
}
else if (_streamSelector == StreamSelector.RSTREAM_ONLY)
{
writer.Write("rstream ");
}
else if (_streamSelector == StreamSelector.RSTREAM_ISTREAM_BOTH)
{
writer.Write("irstream ");
}
if (_selectList != null && !_selectList.IsEmpty())
{
string delimiter = "";
foreach (SelectClauseElement element in _selectList)
{
writer.Write(delimiter);
element.ToEPLElement(writer);
delimiter = ", ";
}
}
else
{
writer.Write('*');
}
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
writer.Write("every-distinct(");
string delimiter = "";
foreach (Expression expr in Expressions)
{
writer.Write(delimiter);
expr.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
delimiter = ",";
}
writer.Write(") ");
Children[0].ToEPL(writer, Precedence, formatter);
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
if (IsNow)
{
writer.Write("@now and");
}
writer.Write("pattern [");
Pattern?.ToEPL(writer, PatternExprPrecedenceEnum.MINIMUM, formatter);
writer.Write("]");
if (IsInclusive)
{
writer.Write("@Inclusive");
}
}
/// <summary>
/// Print.
/// </summary>
/// <param name="writer">to print to</param>
/// <param name="annotations">annotations</param>
/// <param name="formatter">for newline-whitespace formatting</param>
public static void ToEPL(
TextWriter writer,
IList<AnnotationPart> annotations,
EPStatementFormatter formatter)
{
if (annotations == null || annotations.IsEmpty())
{
return;
}
foreach (var part in annotations)
{
if (part.Name == null)
{
continue;
}
formatter.BeginAnnotation(writer);
part.ToEPL(writer);
}
}
/// <summary>
/// Print.
/// </summary>
/// <param name="writer">to print to</param>
/// <param name="scripts">scripts</param>
/// <param name="formatter">for newline-whitespace formatting</param>
public static void ToEPL(
TextWriter writer,
IList<ScriptExpression> scripts,
EPStatementFormatter formatter)
{
if ((scripts == null) || (scripts.IsEmpty()))
{
return;
}
foreach (ScriptExpression part in scripts)
{
if (part.Name == null)
{
continue;
}
formatter.BeginExpressionDecl(writer);
part.ToEPL(writer);
}
}
public void ToEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
writer.Write("coalesce ");
string delimiter = "";
foreach (ContextDescriptorHashSegmentedItem item in Items)
{
writer.Write(delimiter);
item.ToEPL(writer, formatter);
delimiter = ", ";
}
writer.Write(" granularity ");
writer.Write(Convert.ToString(Granularity));
if (IsPreallocate)
{
writer.Write(" preallocate");
}
}
/// <summary>
/// Print.
/// </summary>
/// <param name="writer">to print to</param>
/// <param name="expressionDeclarations">expression declarations</param>
/// <param name="formatter">for newline-whitespace formatting</param>
public static void ToEPL(
TextWriter writer,
IList <ExpressionDeclaration> expressionDeclarations,
EPStatementFormatter formatter)
{
if ((expressionDeclarations == null) || (expressionDeclarations.IsEmpty()))
{
return;
}
foreach (var part in expressionDeclarations)
{
if (part.Name == null)
{
continue;
}
formatter.BeginExpressionDecl(writer);
part.ToEPL(writer);
}
}
public override void ToPrecedenceFreeEPL(
TextWriter writer,
EPStatementFormatter formatter)
{
if (TagName != null)
{
writer.Write(TagName);
writer.Write('=');
}
Filter.ToEPL(writer, formatter);
if (OptionalConsumptionLevel != null)
{
writer.Write("@consume");
if (OptionalConsumptionLevel != 1)
{
writer.Write("(");
writer.Write(Convert.ToString(OptionalConsumptionLevel));
writer.Write(")");
}
}
}
/// <summary>
/// Renders the object model in it's EPL syntax textual representation, using a whitespace-formatter as provided.
/// </summary>
/// <param name="formatter">the formatter to use</param>
/// <param name="writer">writer to use</param>
/// <throws>IllegalStateException if required clauses do not exist</throws>
public void ToEPL(
EPStatementFormatter formatter,
TextWriter writer)
{
AnnotationPart.ToEPL(writer, Annotations, formatter);
ExpressionDeclaration.ToEPL(writer, ExpressionDeclarations, formatter);
ScriptExpression.ToEPL(writer, ScriptExpressions, formatter);
ClassProvidedExpression.ToEPL(writer, ClassProvidedExpressions, formatter);
if (ContextName != null)
{
formatter.BeginContext(writer);
writer.Write("context ");
writer.Write(ContextName);
}
if (CreateIndex != null)
{
formatter.BeginCreateIndex(writer);
CreateIndex.ToEPL(writer);
return;
}
if (CreateSchema != null)
{
formatter.BeginCreateSchema(writer);
CreateSchema.ToEPL(writer);
return;
}
if (CreateExpression != null)
{
formatter.BeginCreateExpression(writer);
CreateExpression.ToEPL(writer);
return;
}
if (CreateClass != null)
{
formatter.BeginCreateExpression(writer);
CreateClass.ToEPL(writer);
return;
}
if (CreateContext != null)
{
formatter.BeginCreateContext(writer);
CreateContext.ToEPL(writer, formatter);
return;
}
if (CreateWindow != null)
{
formatter.BeginCreateWindow(writer);
CreateWindow.ToEPL(writer);
writer.Write(" as ");
if (SelectClause == null || SelectClause.SelectList.IsEmpty() && !CreateWindow.Columns.IsEmpty())
{
CreateWindow.ToEPLCreateTablePart(writer);
}
else
{
SelectClause.ToEPL(writer, formatter, false, false);
if (CreateWindow.AsEventTypeName != null)
{
writer.Write(" from ");
writer.Write(CreateWindow.AsEventTypeName);
}
CreateWindow.ToEPLInsertPart(writer);
}
return;
}
if (CreateVariable != null)
{
formatter.BeginCreateVariable(writer);
CreateVariable.ToEPL(writer);
return;
}
if (CreateTable != null)
{
formatter.BeginCreateTable(writer);
CreateTable.ToEPL(writer);
return;
}
if (CreateDataFlow != null)
{
formatter.BeginCreateDataFlow(writer);
CreateDataFlow.ToEPL(writer, formatter);
return;
}
var displayWhereClause = true;
if (UpdateClause != null)
{
formatter.BeginUpdate(writer);
UpdateClause.ToEPL(writer);
}
else if (OnExpr != null)
{
formatter.BeginOnTrigger(writer);
writer.Write("on ");
FromClause.Streams[0].ToEPL(writer, formatter);
if (OnExpr is OnDeleteClause onDeleteClause)
{
formatter.BeginOnDelete(writer);
writer.Write("delete from ");
onDeleteClause.ToEPL(writer);
}
else if (OnExpr is OnUpdateClause onUpdateClause)
{
formatter.BeginOnUpdate(writer);
writer.Write("update ");
onUpdateClause.ToEPL(writer);
}
else if (OnExpr is OnSelectClause onSelectClause)
{
InsertInto?.ToEPL(writer, formatter, true);
SelectClause.ToEPL(writer, formatter, true, onSelectClause.IsDeleteAndSelect);
writer.Write(" from ");
onSelectClause.ToEPL(writer);
}
else if (OnExpr is OnSetClause onSetClause)
{
onSetClause.ToEPL(writer, formatter);
}
else if (OnExpr is OnMergeClause onMergeClause)
{
onMergeClause.ToEPL(writer, WhereClause, formatter);
displayWhereClause = false;
}
else
{
var split = (OnInsertSplitStreamClause)OnExpr;
InsertInto.ToEPL(writer, formatter, true);
SelectClause.ToEPL(writer, formatter, true, false);
if (WhereClause != null)
{
writer.Write(" where ");
WhereClause.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
split.ToEPL(writer, formatter);
displayWhereClause = false;
}
}
else
{
IntoTableClause?.ToEPL(writer);
if (SelectClause == null)
{
throw new IllegalStateException("Select-clause has not been defined");
}
if (FromClause == null)
{
throw new IllegalStateException("From-clause has not been defined");
}
if (FireAndForgetClause is FireAndForgetUpdate fireAndForgetUpdate)
{
writer.Write("update ");
FromClause.ToEPLOptions(writer, formatter, false);
writer.Write(" ");
UpdateClause.RenderEPLAssignments(writer, fireAndForgetUpdate.Assignments);
}
else if (FireAndForgetClause is FireAndForgetInsert fireAndForgetInsert)
{
InsertInto.ToEPL(writer, formatter, true);
if (fireAndForgetInsert.IsUseValuesKeyword)
{
writer.Write(" values (");
var delimiter = "";
foreach (var element in SelectClause.SelectList)
{
writer.Write(delimiter);
element.ToEPLElement(writer);
delimiter = ", ";
}
writer.Write(")");
}
else
{
SelectClause.ToEPL(writer, formatter, true, false);
}
}
else if (FireAndForgetClause is FireAndForgetDelete)
{
writer.Write("delete ");
FromClause.ToEPLOptions(writer, formatter, true);
}
else
{
InsertInto?.ToEPL(writer, formatter, true);
SelectClause.ToEPL(writer, formatter, true, false);
FromClause.ToEPLOptions(writer, formatter, true);
}
}
MatchRecognizeClause?.ToEPL(writer);
if (WhereClause != null && displayWhereClause)
{
formatter.BeginWhere(writer);
writer.Write("where ");
WhereClause.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
if (GroupByClause != null)
{
formatter.BeginGroupBy(writer);
writer.Write("group by ");
GroupByClause.ToEPL(writer);
}
if (HavingClause != null)
{
formatter.BeginHaving(writer);
writer.Write("having ");
HavingClause.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
if (OutputLimitClause != null)
{
formatter.BeginOutput(writer);
writer.Write("output ");
OutputLimitClause.ToEPL(writer);
}
if (OrderByClause != null)
{
formatter.BeginOrderBy(writer);
writer.Write("order by ");
OrderByClause.ToEPL(writer);
}
if (RowLimitClause != null)
{
formatter.BeginLimit(writer);
writer.Write("limit ");
RowLimitClause.ToEPL(writer);
}
if (ForClause != null)
{
formatter.BeginFor(writer);
ForClause.ToEPL(writer);
}
}