MultiTopicImpl::MultiTopicImpl(const char* name,
const char* type_name, const char* subscription_expression,
const DDS::StringSeq& expression_parameters,
DomainParticipantImpl* participant)
: TopicDescriptionImpl(name, type_name,
findTypeSupport(participant, type_name),
participant)
, subscription_expression_(subscription_expression)
, expression_parameters_(expression_parameters)
, filter_eval_(NULL)
{
const char* out = subscription_expression
+ std::strlen(subscription_expression);
yard::SimpleTextParser parser(subscription_expression, out);
if (!parser.Parse<TopicExpressionGrammar::TopicCompleteInput>()) {
reportErrors(parser, subscription_expression);
}
for (AstNode* iter = parser.GetAstRoot()->GetFirstChild(); iter;
iter = iter->GetSibling()) {
if (iter->TypeMatches<TopicExpressionGrammar::SubjectFieldSpec>()) {
AstNode* fieldName = iter->GetFirstChild();
aggregation_.push_back(SubjectFieldSpec(toString(fieldName),
toString(fieldName->GetSibling())));
} else if (iter->TypeMatches<TopicExpressionGrammar::TopicName>()) {
selection_.push_back(toString(iter));
} else {
filter_eval_ = new FilterEvaluator(iter);
}
}
}
