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#include "include_entity_resolver.h"
#include <xercesc/framework/LocalFileInputSource.hpp>
#include <boost/filesystem.hpp>
#include "support/xalan_string.h"
#include "support/xerces_string_guard.h"
namespace {
boost::optional<boost::filesystem::path> extractFilePath(
const std::string& rawPath) {
const std::size_t leadingDelimiter = rawPath.find_first_of('[');
const std::size_t closingDelimiter = rawPath.find_last_of(']');
if ( leadingDelimiter != std::string::npos &&
closingDelimiter != std::string::npos &&
leadingDelimiter < closingDelimiter ) {
return boost::make_optional(
boost::filesystem::path(
rawPath.substr(
leadingDelimiter + 1,
closingDelimiter - 1 - leadingDelimiter
)
)
);
} else {
return boost::optional<boost::filesystem::path>();
}
}
inline const XMLCh* shiftSystemIdPastPrefix(const XMLCh* const systemId) {
return systemId + 7;
}
}
namespace InputXSLT {
boost::filesystem::path IncludeEntityResolver::getPathFromSystemId(
const XMLCh* const systemId) {
const std::string rawPath(
*XercesStringGuard<char>(
shiftSystemIdPastPrefix(systemId)
)
);
if ( auto extractedPath = extractFilePath(rawPath) ) {
return *extractedPath;
} else {
return boost::filesystem::path(rawPath);
}
}
IncludeEntityResolver::IncludeEntityResolver(
const std::vector<std::string>& path):
path_(path.begin(), path.end()) { }
xercesc::InputSource* IncludeEntityResolver::resolveEntity(
const XMLCh* const,
const XMLCh* const systemId
) {
if ( systemId != nullptr ) {
const std::string systemIdString(
*XercesStringGuard<char>(systemId)
);
if ( auto resolvedPath = this->resolve(systemIdString) ) {
return new xercesc::LocalFileInputSource(
*XercesStringGuard<XMLCh>((*resolvedPath).string())
);
} else {
return new xercesc::LocalFileInputSource(
shiftSystemIdPastPrefix(systemId)
);
}
} else {
return nullptr;
}
}
boost::optional<boost::filesystem::path> IncludeEntityResolver::resolve(
const std::string& rawPath) const {
if ( auto filePath = extractFilePath(rawPath) ) {
if ( auto resolvedPath = this->tryIncludePaths(*filePath) ) {
return boost::make_optional(*resolvedPath);
} else {
return boost::make_optional(*filePath);
}
} else {
return boost::optional<boost::filesystem::path>();
}
}
boost::optional<boost::filesystem::path> IncludeEntityResolver::tryIncludePaths(
const boost::filesystem::path& filePath) const {
for ( auto&& context : this->path_ ) {
const boost::filesystem::path resolvedPath(
context.resolve(filePath)
);
if ( boost::filesystem::exists(resolvedPath) ) {
return boost::make_optional(resolvedPath);
}
}
return boost::optional<boost::filesystem::path>();
}
}
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