--- a/src/XPathHandler.h Wed Dec 30 00:39:03 2020 +0100
+++ b/src/XPathHandler.h Wed Dec 30 01:28:45 2020 +0100
@@ -34,6 +34,7 @@
#include <relpipe/cli/RelpipeCLIException.h>
#include "Configuration.h"
+#include "XMLNameCodec.h"
namespace relpipe {
namespace tr {
@@ -41,14 +42,18 @@
class XPathHandler : public relpipe::reader::handlers::RelationalReaderStringHandler {
private:
+ std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // XML is in UTF-8
shared_ptr<relpipe::writer::RelationalWriter> relationalWriter;
Configuration configuration;
- RelationConfiguration* currentRelationConfiguration;
+ RelationConfiguration* currentRelationConfiguration = nullptr;
std::vector<relpipe::reader::handlers::AttributeMetadata> currentReaderMetadata;
std::vector<relpipe::writer::AttributeMetadata> currentWriterMetadata;
size_t currentAttributeIndex = 0;
-
+
+
xmlpp::DomParser dom;
+ xmlpp::Element* recordElement = nullptr;
+ relpipe::in::xmltable::XMLNameCodec xmlNameCodec; // TODO: move to a common library
void copyInputAttributesToOutput() {
for (auto rm : currentReaderMetadata) currentWriterMetadata.push_back({rm.getAttributeName(), relationalWriter->toTypeId(rm.getTypeName())});
@@ -63,6 +68,35 @@
return currentRelationConfiguration->inputAttributePolicy == InputAttributePolicy::Append;
}
+ void resetRecordElement() {
+ if (recordElement) dom.get_document()->get_root_node()->remove_child(recordElement);
+ recordElement = dom.get_document()->get_root_node()->add_child("record");
+ }
+
+ const Glib::ustring s2x(relpipe::common::type::StringX value) {
+ return Glib::ustring(convertor.to_bytes(value));
+ }
+
+ const relpipe::common::type::StringX x2s(const Glib::ustring& value) {
+ return convertor.from_bytes(value);
+ }
+
+ void writeInputAttributes() {
+ for (xmlpp::Node* attributeNode : recordElement->get_children()) {
+ if (xmlpp::Element * attributeElement = dynamic_cast<xmlpp::Element*> (attributeNode)) {
+ auto value = attributeElement->get_child_text()->get_content();
+ relationalWriter->writeAttribute(x2s(value));
+ }
+ }
+ }
+
+ void writeOutputAttributes() {
+ for (auto oa : currentRelationConfiguration->outputAttributes) {
+ auto value = recordElement->eval_to_string(s2x(oa.xpath));
+ relationalWriter->writeAttribute(x2s(value));
+ }
+ }
+
public:
XPathHandler(shared_ptr<relpipe::writer::RelationalWriter> relationalWriter, Configuration configuration) : relationalWriter(relationalWriter), configuration(configuration) {
@@ -92,6 +126,8 @@
if (isAppendingInputAttributes()) copyInputAttributesToOutput();
// TODO: prepare DOM
+ dom.get_document()->create_root_node("relpipe-tr-xpath");
+ resetRecordElement();
}
relationalWriter->startRelation(name, currentWriterMetadata, true);
@@ -101,15 +137,21 @@
if (currentRelationConfiguration) {
relpipe::reader::handlers::AttributeMetadata attributeMetadata = currentReaderMetadata[currentAttributeIndex];
- // TODO: add attribute to DOM
+ xmlpp::Element* attributeElement = recordElement->add_child(xmlNameCodec.encode(s2x(attributeMetadata.getAttributeName())));
+ attributeElement->set_attribute("name", s2x(attributeMetadata.getAttributeName()));
+ attributeElement->set_attribute("type", s2x(attributeMetadata.getTypeName()));
+ attributeElement->add_child_text(s2x(value));
currentAttributeIndex++;
if (currentAttributeIndex == currentReaderMetadata.size()) {
+ if (currentRelationConfiguration->where.empty() || recordElement->eval_to_boolean(s2x(currentRelationConfiguration->where))) {
+ if (isPrependingInputAttributes()) writeInputAttributes();
+ writeOutputAttributes();
+ if (isAppendingInputAttributes()) writeInputAttributes();
+ }
- // TODO: evaluate XPath expression
- // TODO: write record to output, if the XPath condition was met
- // TODO: clean record node in DOM
+ resetRecordElement();
currentAttributeIndex = 0;
}
} else {