public static IList <ColumnDesc> GetColTypeList(EsperEPL2GrammarParser.CreateColumnListContext ctx)
{
if (ctx == null)
{
return(Collections.GetEmptyList <ColumnDesc>());
}
IList <ColumnDesc> result = new List <ColumnDesc>(ctx.createColumnListElement().Length);
foreach (var colctx in ctx.createColumnListElement())
{
IList <EsperEPL2GrammarParser.ClassIdentifierContext> idents = colctx.classIdentifier();
var name = ASTUtil.UnescapeClassIdent(idents[0]);
string type;
if (colctx.VALUE_NULL() != null)
{
type = null;
}
else
{
type = ASTUtil.UnescapeClassIdent(idents[1]);
}
var array = colctx.b != null;
var primitiveArray = ValidateIsPrimitiveArray(colctx.p);
result.Add(new ColumnDesc(name, type, array, primitiveArray));
}
return(result);
}
public static FilterSpecRaw WalkFilterSpec(EsperEPL2GrammarParser.EventFilterExpressionContext ctx, PropertyEvalSpec propertyEvalSpec, IDictionary <ITree, ExprNode> astExprNodeMap)
{
var eventName = ASTUtil.UnescapeClassIdent(ctx.classIdentifier());
var exprNodes = ctx.expressionList() != null?ASTExprHelper.ExprCollectSubNodes(ctx.expressionList(), 0, astExprNodeMap) : new List <ExprNode>(1);
return(new FilterSpecRaw(eventName, exprNodes, propertyEvalSpec));
}
private static String[] ParseParamsStreamNames(EsperEPL2GrammarParser.GopParamsItemContext item)
{
IList <String> paramNames = new List <String>(1);
if (item.gopParamsItemMany() != null)
{
foreach (var ctx in item.gopParamsItemMany().classIdentifier())
{
paramNames.Add(ctx.GetText());
}
}
else
{
paramNames.Add(ASTUtil.UnescapeClassIdent(item.classIdentifier()));
}
return(paramNames.ToArray());
}
/// <summary>
/// Walk an annotation root name or child node (nested annotations).
/// </summary>
/// <param name="ctx">annotation walk node</param>
/// <param name="engineImportService">for engine imports</param>
/// <returns>annotation descriptor</returns>
/// <throws>ASTWalkException if the walk failed</throws>
public static AnnotationDesc Walk(EsperEPL2GrammarParser.AnnotationEnumContext ctx, EngineImportService engineImportService)
{
var name = ASTUtil.UnescapeClassIdent(ctx.classIdentifier());
IList <Pair <String, Object> > values = new List <Pair <String, Object> >();
if (ctx.elementValueEnum() != null)
{
var value = WalkValue(ctx.elementValueEnum(), engineImportService);
values.Add(new Pair <String, Object>("Value", value));
}
else if (ctx.elementValuePairsEnum() != null)
{
WalkValuePairs(ctx.elementValuePairsEnum(), values, engineImportService);
}
return(new AnnotationDesc(name, values));
}
private static GraphOperatorOutputItemType ParseType(EsperEPL2GrammarParser.GopOutTypeParamContext ctx)
{
if (ctx.q != null)
{
return(new GraphOperatorOutputItemType(true, null, null));
}
var className = ASTUtil.UnescapeClassIdent(ctx.gopOutTypeItem().classIdentifier());
IList <GraphOperatorOutputItemType> typeParams = new List <GraphOperatorOutputItemType>();
if (ctx.gopOutTypeItem().gopOutTypeList() != null)
{
IList <EsperEPL2GrammarParser.GopOutTypeParamContext> pctxs = ctx.gopOutTypeItem().gopOutTypeList().gopOutTypeParam();
foreach (var pctx in pctxs)
{
var type = ParseType(pctx);
typeParams.Add(type);
}
}
return(new GraphOperatorOutputItemType(false, className, typeParams));
}
private static ASTLibModel GetModel(EsperEPL2GrammarParser.LibFunctionContext ctx, CommonTokenStream tokenStream)
{
var root = ctx.libFunctionWithClass();
IList <EsperEPL2GrammarParser.LibFunctionNoClassContext> ctxElements = ctx.libFunctionNoClass();
// there are no additional methods
if (ctxElements == null || ctxElements.IsEmpty())
{
var classIdent = root.classIdentifier() == null ? null : ASTUtil.UnescapeClassIdent(root.classIdentifier());
var ele = FromRoot(root);
return(new ASTLibModel(classIdent, Collections.SingletonList(ele)));
}
// add root and chain to just a list of elements
IList <ASTLibModelChainElement> chainElements = new List <ASTLibModelChainElement>(ctxElements.Count + 1);
var rootElement = FromRoot(root);
chainElements.Add(rootElement);
foreach (var chainedCtx in ctxElements)
{
var chainedElement = new ASTLibModelChainElement(chainedCtx.funcIdentChained().GetText(), chainedCtx.libFunctionArgs(), chainedCtx.l != null);
chainElements.Add(chainedElement);
}
// determine/remove the list of chain elements, from the start and uninterrupted, that don't have parameters (no parenthesis 'l')
IList <ASTLibModelChainElement> chainElementsNoArgs = new List <ASTLibModelChainElement>(chainElements.Count);
for (int ii = 0; ii < chainElements.Count; ii++)
{
var element = chainElements[ii];
if (!element.HasLeftParen)
{
// has no parenthesis, therefore part of class identifier
chainElementsNoArgs.Add(element);
chainElements.RemoveAt(ii--);
}
else
{
// else stop here
break;
}
}
// write the class identifier including the no-arg chain elements
var classIdentBuf = new StringBuilder();
var delimiter = "";
if (root.classIdentifier() != null)
{
classIdentBuf.Append(ASTUtil.UnescapeClassIdent(root.classIdentifier()));
delimiter = ".";
}
foreach (var noarg in chainElementsNoArgs)
{
classIdentBuf.Append(delimiter);
classIdentBuf.Append(noarg.FuncName);
delimiter = ".";
}
if (chainElements.IsEmpty())
{
// would this be an event property, but then that is handled greedily by parser
throw ASTWalkException.From("Encountered unrecognized lib function call", tokenStream, ctx);
}
// class ident can be null if empty
var classIdentifierString = classIdentBuf.ToString();
var classIdentifier = classIdentifierString.Length > 0 ? classIdentifierString : null;
return(new ASTLibModel(classIdentifier, chainElements));
}
public static Pair <ExpressionDeclItem, ExpressionScriptProvided> WalkExpressionDecl(
EsperEPL2GrammarParser.ExpressionDeclContext ctx,
IList <String> scriptBodies,
IDictionary <ITree, ExprNode> astExprNodeMap,
CommonTokenStream tokenStream)
{
var name = ctx.name.Text;
if (ctx.alias != null)
{
if (ctx.alias.Text.ToLower().Trim() != "alias")
{
throw ASTWalkException.From("For expression alias '" + name + "' expecting 'alias' keyword but received '" + ctx.alias.Text + "'");
}
if (ctx.columnList() != null)
{
throw ASTWalkException.From("For expression alias '" + name + "' expecting no parameters but received '" + tokenStream.GetText(ctx.columnList()) + "'");
}
if (ctx.expressionDef() != null && ctx.expressionDef().expressionLambdaDecl() != null)
{
throw ASTWalkException.From("For expression alias '" + name + "' expecting an expression without parameters but received '" + tokenStream.GetText(ctx.expressionDef().expressionLambdaDecl()) + "'");
}
if (ctx.expressionDef().stringconstant() != null)
{
throw ASTWalkException.From("For expression alias '" + name + "' expecting an expression but received a script");
}
var exprNode = ASTExprHelper.ExprCollectSubNodes(ctx, 0, astExprNodeMap)[0];
var alias = ctx.name.Text;
var decl = new ExpressionDeclItem(alias, Collections.GetEmptyList <String>(), exprNode, true);
return(new Pair <ExpressionDeclItem, ExpressionScriptProvided>(decl, null));
}
if (ctx.expressionDef().stringconstant() != null)
{
var expressionText = scriptBodies[0];
scriptBodies.RemoveAt(0);
var parameters = ASTUtil.GetIdentList(ctx.columnList());
var optionalReturnType = ctx.classIdentifier() == null
? null
: ASTUtil.UnescapeClassIdent(ctx.classIdentifier());
var optionalReturnTypeArray = ctx.array != null;
var optionalDialect = ctx.expressionDialect() == null ? null : ctx.expressionDialect().d.Text;
var script = new ExpressionScriptProvided(
name, expressionText, parameters,
optionalReturnType, optionalReturnTypeArray, optionalDialect);
return(new Pair <ExpressionDeclItem, ExpressionScriptProvided>(null, script));
}
var ctxexpr = ctx.expressionDef();
var inner = ASTExprHelper.ExprCollectSubNodes(ctxexpr.expression(), 0, astExprNodeMap)[0];
var parametersNames = Collections.GetEmptyList <string>();
var lambdactx = ctxexpr.expressionLambdaDecl();
if (ctxexpr.expressionLambdaDecl() != null)
{
parametersNames = ASTLibFunctionHelper.GetLambdaGoesParams(lambdactx);
}
var expr = new ExpressionDeclItem(name, parametersNames, inner, false);
return(new Pair <ExpressionDeclItem, ExpressionScriptProvided>(expr, null));
}
private static CreateTableColumn GetColumn(EsperEPL2GrammarParser.CreateTableColumnContext ctx, IDictionary <ITree, ExprNode> astExprNodeMap, EngineImportService engineImportService)
{
string columnName = ctx.n.Text;
ExprNode optExpression = null;
if (ctx.builtinFunc() != null || ctx.libFunction() != null)
{
optExpression = ASTExprHelper.ExprCollectSubNodes(ctx, 0, astExprNodeMap)[0];
}
string optTypeName = null;
bool? optTypeIsArray = null;
bool? optTypeIsPrimitiveArray = null;
if (ctx.createTableColumnPlain() != null)
{
EsperEPL2GrammarParser.CreateTableColumnPlainContext sub = ctx.createTableColumnPlain();
optTypeName = ASTUtil.UnescapeClassIdent(sub.classIdentifier());
optTypeIsArray = sub.b != null;
optTypeIsPrimitiveArray = ASTCreateSchemaHelper.ValidateIsPrimitiveArray(sub.p);
}
bool primaryKey = false;
if (ctx.p != null)
{
if (ctx.p.Text.ToLower() != "primary")
{
throw ASTWalkException.From("Invalid keyword '" + ctx.p.Text + "' encountered, expected 'primary key'");
}
if (ctx.k.Text.ToLower() != "key")
{
throw ASTWalkException.From("Invalid keyword '" + ctx.k.Text + "' encountered, expected 'primary key'");
}
primaryKey = true;
}
IList <AnnotationDesc> annots = Collections.GetEmptyList <AnnotationDesc>();
if (ctx.annotationEnum() != null)
{
annots = new List <AnnotationDesc>(ctx.annotationEnum().Length);
foreach (EsperEPL2GrammarParser.AnnotationEnumContext anctx in ctx.annotationEnum())
{
annots.Add(ASTAnnotationHelper.Walk(anctx, engineImportService));
}
}
if (ctx.propertyExpressionAnnotation() != null)
{
if (annots.IsEmpty())
{
annots = new List <AnnotationDesc>();
}
foreach (EsperEPL2GrammarParser.PropertyExpressionAnnotationContext anno in ctx.propertyExpressionAnnotation())
{
annots.Add(new AnnotationDesc(anno.n.Text, anno.v.Text));
}
}
return(new CreateTableColumn(columnName, optExpression, optTypeName, optTypeIsArray, optTypeIsPrimitiveArray, annots, primaryKey));
}
