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");
}
}
/// <summary>
/// Exit a parse tree produced by <see cref="V1QueryParser.simple_filter_term"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitSimple_filter_term([NotNull] V1QueryParser.Simple_filter_termContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="V1QueryParser.simple_filter_term"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitSimple_filter_term([NotNull] V1QueryParser.Simple_filter_termContext context)
{
return(VisitChildren(context));
}
