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#include "transform.h"

#include <xalanc/XercesParserLiaison/FormatterToXercesDOM.hpp>

#include <xercesc/dom/DOMDocument.hpp>
#include <xercesc/dom/DOMImplementation.hpp>
#include <xercesc/dom/DOMElement.hpp>

#include "transformer_facade.h"
#include "support/xerces_string_guard.h"
#include "support/dom/result_node_facade.h"
#include "support/error/error_capacitor.h"

namespace {

using InputXSLT::ErrorCapacitor;

inline void handleErrors(
	InputXSLT::ResultNodeFacade&       result,
	const ErrorCapacitor::error_cache& errors
) {
	result.setAttribute("result", "error");

	for ( auto&& error : errors ) {
		result.setValueNode("error", error);
	}
}

}

namespace InputXSLT {

xercesc::DOMDocument* FunctionTransform::constructDocument(
	xalan::XSLTInputSource  inputSource,
	xalan::XSLTInputSource  transformationSource
) {
	xercesc::DOMDocument* const domDocument(
		xercesc::DOMImplementation::getImplementation()->createDocument(
			nullptr,
			*XercesStringGuard<XMLCh>("content"),
			nullptr
		)
	);

	xercesc::DOMElement* const rootElement(
		domDocument->getDocumentElement()
	);

	ResultNodeFacade result(domDocument, rootElement, "transformation");
	TransformerFacade transformer(this->include_resolver_);

	try {
		xalan::FormatterToXercesDOM targetFormatter(
			domDocument,
			result.getResultElement()
		);

		transformer.generate(
			inputSource,
			transformationSource,
			targetFormatter
		);

		result.setAttribute("result", "success");
	}
	catch (const ErrorCapacitor::exception& exception) {
		handleErrors(result, *exception);
	}

	WarningCapacitor::warning_cache_ptr warnings(
		transformer.getCachedWarnings()
	);

	for ( auto&& warning : *warnings ) {
		result.setValueNode("warning", warning);
	}

	return domDocument;
}

}