public override AttributeDefinition VisitAttribute_name(V1QueryParser.Attribute_nameContext context)
{
var parts = context.attribute_name_part();
var result = Visit(parts[0]);
if (parts.Length > 1)
{
for (var i = 1; i < parts.Length; i++)
{
var part = parts[i];
var subVisitor = new AttributeDefinitionVisitor(result.RelatedAssetType, _metaModel);
var relatedAttributeDefinition = subVisitor.Visit(part);
result = result.CreateJoinAttributeDefinition(relatedAttributeDefinition);
}
}
var agg = context.aggregation_name();
if (agg != null)
{
var aggregateName = agg.NAME().GetText();
var aggregateType = (AggregateType)Enum.Parse(typeof(AggregateType), aggregateName);
result = result.CreateAggregateAttributeDefinition(aggregateType);
}
return(result);
}
public override OrderTerm VisitDesc_sort_token_term(V1QueryParser.Desc_sort_token_termContext context)
{
var visitor = new AttributeDefinitionVisitor(_assetType, _metaModel);
var attributeDefinition = visitor.VisitAttribute_name(context.attribute_name());
return(new OrderTerm(attributeDefinition, OrderTermDirection.Descending));
}
public static AttributeDefinition Parse(string attributeNameToken, AssetType assetType, MetaModel metaModel)
{
ICharStream charStream = new AntlrInputStream(attributeNameToken);
ITokenSource tokenSource = new V1QueryLexer(charStream);
ITokenStream tokenStream = new CommonTokenStream(tokenSource);
var parser = new V1QueryParser(tokenStream);
var attributeName = parser.attribute_name();
var visitor = new AttributeDefinitionVisitor(assetType, metaModel);
return(visitor.Visit(attributeName));
}
public override FilterTerm VisitSimple_filter_term(V1QueryParser.Simple_filter_termContext context)
{
var attributeName = context.attribute_name();
var attributeVisitor = new AttributeDefinitionVisitor(_rootAssetType, _metaModel);
var attributeDefinition = attributeVisitor.Visit(attributeName);
var binaryOperator = context.binary_operator();
if (binaryOperator == null)
{
var unaryOperator = context.unary_operator();
if (unaryOperator?.MINUS() != null)
{
return(FieldFilterTerm.NotExists(attributeDefinition));
}
return(FieldFilterTerm.Exists(attributeDefinition));
}
List <object> values = new List <object>();
var valueList = context.filter_value_list();
if (valueList != null)
{
var filterValues = valueList.filter_value();
foreach (var filterValue in filterValues)
{
var singleQuoteValue = filterValue.SINGLE_QUOTED_STRING();
var doubleQuoteValue = filterValue.DOUBLE_QUOTED_STRING();
string filterValueToken = singleQuoteValue?.GetText() ?? doubleQuoteValue.GetText();
filterValueToken = filterValueToken.Substring(1, filterValueToken.Length - 2);
values.Add(attributeDefinition.Coerce(filterValueToken));
}
}
else
{
var variableContext = context.variable();
throw new NotImplementedException("Filter Variables");
}
var binaryOperatorText = binaryOperator.GetText();
switch (binaryOperatorText)
{
case "=":
return(FieldFilterTerm.Equal(attributeDefinition, values));
case "!=":
return(FieldFilterTerm.NotEqual(attributeDefinition, values));
case "<":
return(FieldFilterTerm.Less(attributeDefinition, values));
case "<=":
return(FieldFilterTerm.LessOrEqual(attributeDefinition, values));
case ">":
return(FieldFilterTerm.Greater(attributeDefinition, values));
case ">=":
return(FieldFilterTerm.GreaterOrEqual(attributeDefinition, values));
default:
throw new NotSupportedException("Unknown binary operator");
}
}
