Alan Howells created XERCESC-2232:
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Summary: xsi:nil="false" fails validation for child elements
Key: XERCESC-2232
URL: https://issues.apache.org/jira/browse/XERCESC-2232
Project: Xerces-C++
Issue Type: Bug
Components: Validating Parser (XML Schema)
Affects Versions: 3.2.3
Reporter: Alan Howells
Attachments: main.cxx
We recently upgraded to 3.2.3 and found an issue with xsi:nil="false"
Running the following code (also attached):
{code:java}
#include <iostream>
#include <string>
#include <xercesc/dom/DOMException.hpp>
#include <xercesc/framework/MemBufInputSource.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include <xercesc/sax/ErrorHandler.hpp>
#include <xercesc/sax/SAXParseException.hpp>
namespace
{
class XMLValidatorErrorHandler : public xercesc::ErrorHandler
{
public:
void warning(const xercesc::SAXParseException &e) final
{
std::cerr << "Warning at file "
<< xercesc::XMLString::transcode(e.getSystemId())
<< ", line " << e.getLineNumber() << ", char "
<< e.getColumnNumber() << ". Message: "
<< xercesc::XMLString::transcode(e.getMessage()) << "\n";
}
void error(const xercesc::SAXParseException &e) final
{
std::cerr << "Error at file "
<< xercesc::XMLString::transcode(e.getSystemId())
<< ", line " << e.getLineNumber() << ", char "
<< e.getColumnNumber() << ". Message: "
<< xercesc::XMLString::transcode(e.getMessage()) << "\n";
}
void fatalError(const xercesc::SAXParseException &e) final
{
std::cerr << "Fatal Error at file "
<< xercesc::XMLString::transcode(e.getSystemId())
<< ", line " << e.getLineNumber() << ", char "
<< e.getColumnNumber() << ". Message: "
<< xercesc::XMLString::transcode(e.getMessage()) << "\n";
}
void resetErrors() final
{
}
};
} // namespace
int
main(int argc, char **argv)
{
static_cast<void>(argc);
static_cast<void>(argv);
xercesc::XMLPlatformUtils::Initialize();
std::string inputXml(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
"<ns1:NillableElement"
" xmlns:ns1=\"http://amat.com/apf/Nillable\"\n";
" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n";
" xsi:schemaLocation=\"http://amat.com/apf/Nillable Nillable.xsd\"\n"
" xsi:nil=\"false\">\n"
" <ns1:Val1>v1</ns1:Val1>\n"
"</ns1:NillableElement>\n");
std::string inputSchema(
"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
"<xs:schema"
" xmlns:xs=\"http://www.w3.org/2001/XMLSchema\"\n";
" xmlns:tns=\"http://amat.com/apf/Nillable\"\n";
" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n";
" targetNamespace=\"http://amat.com/apf/Nillable\"\n";
" elementFormDefault=\"qualified\">\n"
" <xs:complexType name=\"TestType\">\n"
" <xs:sequence>\n"
" <xs:element name=\"Val1\" type=\"xs:string\"/>\n"
" </xs:sequence>\n"
" </xs:complexType>\n"
" <xs:element name=\"NillableElement\" type=\"tns:TestType\" "
"nillable=\"true\"/>\n"
" <xs:element name=\"NonNillableElement\" type=\"tns:TestType\" "
"nillable=\"false\"/>\n"
"</xs:schema>\n");
xercesc::XercesDOMParser parser;
parser.setValidationScheme(xercesc::XercesDOMParser::Val_Always);
parser.setDoNamespaces(true);
parser.setDoSchema(true);
parser.setValidationSchemaFullChecking(true);
parser.cacheGrammarFromParse(true);
parser.useCachedGrammarInParse(true);
XMLValidatorErrorHandler errorHandler;
parser.setErrorHandler(&errorHandler);
try {
// Get Schema Input Source
xercesc::MemBufInputSource schemaInputSource(
reinterpret_cast<const XMLByte *>(inputSchema.c_str()),
static_cast<XMLSize_t>(inputSchema.size()),
"schema");
parser.loadGrammar(
schemaInputSource, xercesc::Grammar::SchemaGrammarType, true);
}
catch (const xercesc::XMLException &e) {
std::cerr << "Fatal Error during schema parsing: "
<< xercesc::XMLString::transcode(e.getMessage()) << "\n";
return EXIT_FAILURE;
}
catch (const xercesc::DOMException &e) {
std::cerr << "Fatal Error during schema parsing: "
<< xercesc::XMLString::transcode(e.getMessage()) << "\n";
return EXIT_FAILURE;
}
// Validate the XML against the Schema.
try {
// Get XML Input Source
xercesc::MemBufInputSource xmlInputSource(
reinterpret_cast<const XMLByte *>(inputXml.c_str()),
static_cast<XMLSize_t>(inputXml.size()),
"xml");
parser.parse(xmlInputSource);
}
catch (const xercesc::XMLException &e) {
std::cerr << "Fatal Error during xml parsing: "
<< xercesc::XMLString::transcode(e.getMessage()) << "\n";
return EXIT_FAILURE;
}
catch (const xercesc::DOMException &e) {
std::cerr << "Fatal Error during xml parsing: "
<< xercesc::XMLString::transcode(e.getMessage()) << "\n";
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
{code}
returns the following validation error:
{noformat}
Error at file xml, line 6, char 13. Message: 'xsi:nil' specified for
non-nillable element 'Val1' {noformat}
But:
* Only the NillableElement is marked as nillable in the schema, not Val1.
* Only NillableElement element is marked as xsi:nil="false" in the xml, not
Val1.
* xsi:nil is not specified for Val1
This is a regression against 3.1.1 and older.
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