XML validation error

**flowmaster** · 13th September 2010, 13:13

I have "Premateure end of document" error in at line 1 column 0 of my file, when try to validate it with XSD schema. I've tried to validate it in different software and online validators and they told me, that everything correct. So I decide, that file wasn't read correct, but it can't be cos I use it after validation. So maybe scheme wasn't reade correct? Please help me to find error.

it's part of constructor:

Qt Code:

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QFile tmlFile("..\\tml.xsd");
	if (!tmlFile.open(QIODevice::ReadOnly))
	{
		Message::sendMessage(ERROR, "Can't find validation scheme!", "check if it's on it's place", true);
		return;
	}
	mTmlSchema = new QXmlSchema();
	if (!mTmlSchema->load(&tmlFile))
	{
		tmlFile.close();
		Message::sendMessage(ERROR, "Validation scheme is'n valid", "use some software like Liquid XML studio to validate scheme and fix errors", true);
		return;
	}	
 
	ScanForObjects();
	ScanForLevels();
 
	tmlFile.close();

QFile tmlFile("..\\tml.xsd");
	if (!tmlFile.open(QIODevice::ReadOnly))
	{
		Message::sendMessage(ERROR, "Can't find validation scheme!", "check if it's on it's place", true);
		return;
	}
	mTmlSchema = new QXmlSchema();
	if (!mTmlSchema->load(&tmlFile))
	{
		tmlFile.close();
		Message::sendMessage(ERROR, "Validation scheme is'n valid", "use some software like Liquid XML studio to validate scheme and fix errors", true);
		return;
	}	

	ScanForObjects();
	ScanForLevels();

	tmlFile.close();

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ScanForObjects method code:

Qt Code:

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void 
XmlLoader::ScanForObjects()
{	
	ScanXMLForObjects("..\\Resources\\Objects.xml", &mMapsMap[GLOBAL]);
	ScanXMLForObjects("..\\Resources\\LogicalObjects.xml", &mMapsMap[LOGICAL]);
	ScanXMLForObjects("..\\Resources\\PhysicalObjects.xml", &mMapsMap[PHYSICAL]);
	ScanXMLForObjects("..\\Resources\\GraphicalObjects.xml", &mMapsMap[GRAPHICAL]);
}

void 
XmlLoader::ScanForObjects()
{	
	ScanXMLForObjects("..\\Resources\\Objects.xml", &mMapsMap[GLOBAL]);
	ScanXMLForObjects("..\\Resources\\LogicalObjects.xml", &mMapsMap[LOGICAL]);
	ScanXMLForObjects("..\\Resources\\PhysicalObjects.xml", &mMapsMap[PHYSICAL]);
	ScanXMLForObjects("..\\Resources\\GraphicalObjects.xml", &mMapsMap[GRAPHICAL]);
}

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ScanXMLForObjects method code where bool isValid return false:

Qt Code:

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void 
XmlLoader::ScanXMLForObjects(QString filename, elementsMap* mapToFill)
{
	QXmlSchemaValidator objectsTmlValidator(*mTmlSchema);
	objectsTmlValidator.setMessageHandler(this);
 
	QDomDocument objectsDocument("Objects");	
	QFile objectsFile(filename);
	if (!objectsFile.open(QIODevice::ReadWrite))
	{
		return;
	}
	if (!objectsDocument.setContent(&objectsFile)) 
	{
		objectsFile.close();
		return;
	}
	bool isValid = objectsTmlValidator.validate(&objectsFile, QUrl::fromLocalFile(objectsFile.fileName()));
	objectsFile.close();
 
	QDomElement currentObjectElement = 
		objectsDocument.documentElement().firstChildElement().firstChildElement("Object");
	while (!currentObjectElement.isNull())
	{
		(*mapToFill)[currentObjectElement.attribute("name").toStdString()] = currentObjectElement;
		currentObjectElement = currentObjectElement.nextSiblingElement("Object");
	}
}

void 
XmlLoader::ScanXMLForObjects(QString filename, elementsMap* mapToFill)
{
	QXmlSchemaValidator objectsTmlValidator(*mTmlSchema);
	objectsTmlValidator.setMessageHandler(this);

	QDomDocument objectsDocument("Objects");	
	QFile objectsFile(filename);
	if (!objectsFile.open(QIODevice::ReadWrite))
	{
		return;
	}
	if (!objectsDocument.setContent(&objectsFile)) 
	{
		objectsFile.close();
		return;
	}
	bool isValid = objectsTmlValidator.validate(&objectsFile, QUrl::fromLocalFile(objectsFile.fileName()));
	objectsFile.close();

	QDomElement currentObjectElement = 
		objectsDocument.documentElement().firstChildElement().firstChildElement("Object");
	while (!currentObjectElement.isNull())
	{
		(*mapToFill)[currentObjectElement.attribute("name").toStdString()] = currentObjectElement;
		currentObjectElement = currentObjectElement.nextSiblingElement("Object");
	}
}

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**wysota** · 13th September 2010, 15:24

Please provide a minimum compilable example reproducing the problem.

**flowmaster** · 15th September 2010, 13:03

Ah. I thought that it's not good to place so mush code here, but:

this is header code

Qt Code:

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#pragma once
 
#include <QtXml/QDomElement>
#include <QtXmlPatterns/QXmlSchema>
#include <QtXmlPatterns/QAbstractMessageHandler>
#include <QtCore/QString>
 
#include <map>
 
#define gXML ::XmlLoader::getSingletone()
 
class XmlLoader: public QAbstractMessageHandler
{
public:
	enum dataType
	{		
		GLOBAL = 0,
		LOGICAL = 1,
		PHYSICAL = 2,
		GRAPHICAL = 3,
		DATA_TYPE_COUNT = 4
	};
private:	
	typedef std::map<std::string, QDomElement> elementsMap;
 
	// map of all levels, that was exist at the time of program started
	std::map<dataType, elementsMap> mMapsMap;
	elementsMap mLevelsMap;
	QXmlSchema* mTmlSchema;
 
	static XmlLoader* mInstance;
 
protected:
	virtual void handleMessage(QtMsgType type,
							   const QString& description,
							   const QUrl& identifier, 
							   const QSourceLocation& sourceLocation);
 
private:
	XmlLoader();
	void ScanForLevels();
	void ScanForObjects();
	void ScanXMLForObjects(QString filename, elementsMap* mapToFill);
 
public:
	static XmlLoader* getSingletone();	
	QDomElement* getLevelElement(std::string name);
	QDomElement* getObjectElement(dataType type, std::string name);
	QStringList getAvialableLevelsList();
};

#pragma once

#include <QtXml/QDomElement>
#include <QtXmlPatterns/QXmlSchema>
#include <QtXmlPatterns/QAbstractMessageHandler>
#include <QtCore/QString>

#include <map>

#define gXML ::XmlLoader::getSingletone()

class XmlLoader: public QAbstractMessageHandler
{
public:
	enum dataType
	{		
		GLOBAL = 0,
		LOGICAL = 1,
		PHYSICAL = 2,
		GRAPHICAL = 3,
		DATA_TYPE_COUNT = 4
	};
private:	
	typedef std::map<std::string, QDomElement> elementsMap;

	// map of all levels, that was exist at the time of program started
	std::map<dataType, elementsMap> mMapsMap;
	elementsMap mLevelsMap;
	QXmlSchema* mTmlSchema;

	static XmlLoader* mInstance;
	
protected:
	virtual void handleMessage(QtMsgType type,
							   const QString& description,
							   const QUrl& identifier, 
							   const QSourceLocation& sourceLocation);

private:
	XmlLoader();
	void ScanForLevels();
	void ScanForObjects();
	void ScanXMLForObjects(QString filename, elementsMap* mapToFill);

public:
	static XmlLoader* getSingletone();	
	QDomElement* getLevelElement(std::string name);
	QDomElement* getObjectElement(dataType type, std::string name);
	QStringList getAvialableLevelsList();
};

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And .cpp code

Qt Code:

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#include "xml_loader.h"
//#include "message.h"
 
#include <QtXml/QDomDocument>
#include <QtXmlPatterns/QXmlSchemaValidator>
 
#include <QtCore/QFile>
#include <QtCore/QDir>
#include <QtCore/QUrl>
 
XmlLoader* XmlLoader::mInstance = NULL;
 
XmlLoader* 
XmlLoader::getSingletone()
{
	if (mInstance)
	{
		return mInstance;
	}
	else
	{
		mInstance = new XmlLoader();
		return mInstance;
	}
}
 
XmlLoader::XmlLoader()
		  :QAbstractMessageHandler()
{
	QFile tmlFile("..\\tml.xsd");
	if (!tmlFile.open(QIODevice::ReadOnly))
	{
//		Message::sendMessage(ERROR, "Can't find validation scheme!", "check if it's on it's place", true);
		return;
	}
	mTmlSchema = new QXmlSchema();
	if (!mTmlSchema->load(&tmlFile))
	{
		tmlFile.close();
//		Message::sendMessage(ERROR, "Validation scheme is'n valid", "use some software like Liquid XML studio to validate scheme and fix errors", true);
		return;
	}	
 
	ScanForObjects();
	ScanForLevels();
 
	tmlFile.close();
}
 
void 
XmlLoader::ScanForObjects()
{	
	ScanXMLForObjects("..\\Resources\\Objects.xml", &mMapsMap[GLOBAL]);
	ScanXMLForObjects("..\\Resources\\LogicalObjects.xml", &mMapsMap[LOGICAL]);
	ScanXMLForObjects("..\\Resources\\PhysicalObjects.xml", &mMapsMap[PHYSICAL]);
	ScanXMLForObjects("..\\Resources\\GraphicalObjects.xml", &mMapsMap[GRAPHICAL]);
}
 
void 
XmlLoader::ScanForLevels()
{
	QDir levelsDir("..\\Resources\\Levels");
	QStringList entryList = levelsDir.entryList(QDir::Files);
 
	for (QStringList::iterator i = entryList.begin(); i != entryList.end(); i++)
	{
		QString filename = *i;
		filename = "..\\Resources\\Levels\\" + filename;		
 
		QFile file(filename);
		if (!file.open(QIODevice::ReadOnly))
			return;
 
		QDomDocument levelDocument("Level");
		if (!levelDocument.setContent(&file))
		{
			file.close();
			return;
		}
		file.close();
 
		QDomElement levelElement = levelDocument.documentElement().firstChildElement("Level");
		mLevelsMap[levelElement.attribute("name").toStdString()] = levelElement;
	}
 
	return;
}
 
void 
XmlLoader::handleMessage(QtMsgType type,
						 const QString& description, 
						 const QUrl& identifier, 
						 const QSourceLocation& sourceLocation)
{
	// code to this method was added just to have place for breakpoint
        QString path = identifier.path();
	return;
}
 
QStringList 
XmlLoader::getAvialableLevelsList()
{
	QStringList levelsList;
	for (elementsMap::iterator i = mLevelsMap.begin(); i != mLevelsMap.end(); i++)
	{
		levelsList << tr(i->first.c_str());
	}
	return levelsList;
}
 
QDomElement*
XmlLoader::getLevelElement(std::string name)
{
	elementsMap::iterator i = mLevelsMap.find(name);
	if (i == mLevelsMap.end())
	{
		return NULL;
	}
	else
	{
		return &(i->second);
	}
}
 
QDomElement* 
XmlLoader::getObjectElement(dataType type, std::string name)
{
	elementsMap::iterator i = mMapsMap[type].find(name);
	if (i == mMapsMap[type].end())
	{
		return NULL;
	}
	else
	{
		return &(i->second);
	}
}
 
void 
XmlLoader::ScanXMLForObjects(QString filename, elementsMap* mapToFill)
{
	QXmlSchemaValidator objectsTmlValidator(*mTmlSchema);
	objectsTmlValidator.setMessageHandler(this);
	bool a = objectsTmlValidator.schema().isValid();
 
	QDomDocument objectsDocument("Objects");	
	QFile objectsFile(filename);
	if (!objectsFile.open(QIODevice::ReadWrite))
	{
		return;
	}
 
	QString* errorString = new QString();
	if (!objectsDocument.setContent(&objectsFile, errorString))
	{
		objectsFile.close();
		return;
	}
 
// HERE is my error. isValid always become false
	bool isValid = objectsTmlValidator.validate(&objectsFile, QUrl::fromLocalFile(objectsFile.fileName()));
	objectsFile.close();
 
	QDomElement currentObjectElement = 
		objectsDocument.documentElement().firstChildElement().firstChildElement("Object");
	while (!currentObjectElement.isNull())
	{
		(*mapToFill)[currentObjectElement.attribute("name").toStdString()] = currentObjectElement;
		currentObjectElement = currentObjectElement.nextSiblingElement("Object");
	}
}

#include "xml_loader.h"
//#include "message.h"

#include <QtXml/QDomDocument>
#include <QtXmlPatterns/QXmlSchemaValidator>

#include <QtCore/QFile>
#include <QtCore/QDir>
#include <QtCore/QUrl>

XmlLoader* XmlLoader::mInstance = NULL;

XmlLoader* 
XmlLoader::getSingletone()
{
	if (mInstance)
	{
		return mInstance;
	}
	else
	{
		mInstance = new XmlLoader();
		return mInstance;
	}
}

XmlLoader::XmlLoader()
		  :QAbstractMessageHandler()
{
	QFile tmlFile("..\\tml.xsd");
	if (!tmlFile.open(QIODevice::ReadOnly))
	{
//		Message::sendMessage(ERROR, "Can't find validation scheme!", "check if it's on it's place", true);
		return;
	}
	mTmlSchema = new QXmlSchema();
	if (!mTmlSchema->load(&tmlFile))
	{
		tmlFile.close();
//		Message::sendMessage(ERROR, "Validation scheme is'n valid", "use some software like Liquid XML studio to validate scheme and fix errors", true);
		return;
	}	

	ScanForObjects();
	ScanForLevels();

	tmlFile.close();
}

void 
XmlLoader::ScanForObjects()
{	
	ScanXMLForObjects("..\\Resources\\Objects.xml", &mMapsMap[GLOBAL]);
	ScanXMLForObjects("..\\Resources\\LogicalObjects.xml", &mMapsMap[LOGICAL]);
	ScanXMLForObjects("..\\Resources\\PhysicalObjects.xml", &mMapsMap[PHYSICAL]);
	ScanXMLForObjects("..\\Resources\\GraphicalObjects.xml", &mMapsMap[GRAPHICAL]);
}

void 
XmlLoader::ScanForLevels()
{
	QDir levelsDir("..\\Resources\\Levels");
	QStringList entryList = levelsDir.entryList(QDir::Files);
	
	for (QStringList::iterator i = entryList.begin(); i != entryList.end(); i++)
	{
		QString filename = *i;
		filename = "..\\Resources\\Levels\\" + filename;		

		QFile file(filename);
		if (!file.open(QIODevice::ReadOnly))
			return;

		QDomDocument levelDocument("Level");
		if (!levelDocument.setContent(&file))
		{
			file.close();
			return;
		}
		file.close();

		QDomElement levelElement = levelDocument.documentElement().firstChildElement("Level");
		mLevelsMap[levelElement.attribute("name").toStdString()] = levelElement;
	}

	return;
}

void 
XmlLoader::handleMessage(QtMsgType type,
						 const QString& description, 
						 const QUrl& identifier, 
						 const QSourceLocation& sourceLocation)
{
	// code to this method was added just to have place for breakpoint
        QString path = identifier.path();
	return;
}

QStringList 
XmlLoader::getAvialableLevelsList()
{
	QStringList levelsList;
	for (elementsMap::iterator i = mLevelsMap.begin(); i != mLevelsMap.end(); i++)
	{
		levelsList << tr(i->first.c_str());
	}
	return levelsList;
}

QDomElement*
XmlLoader::getLevelElement(std::string name)
{
	elementsMap::iterator i = mLevelsMap.find(name);
	if (i == mLevelsMap.end())
	{
		return NULL;
	}
	else
	{
		return &(i->second);
	}
}

QDomElement* 
XmlLoader::getObjectElement(dataType type, std::string name)
{
	elementsMap::iterator i = mMapsMap[type].find(name);
	if (i == mMapsMap[type].end())
	{
		return NULL;
	}
	else
	{
		return &(i->second);
	}
}

void 
XmlLoader::ScanXMLForObjects(QString filename, elementsMap* mapToFill)
{
	QXmlSchemaValidator objectsTmlValidator(*mTmlSchema);
	objectsTmlValidator.setMessageHandler(this);
	bool a = objectsTmlValidator.schema().isValid();

	QDomDocument objectsDocument("Objects");	
	QFile objectsFile(filename);
	if (!objectsFile.open(QIODevice::ReadWrite))
	{
		return;
	}

	QString* errorString = new QString();
	if (!objectsDocument.setContent(&objectsFile, errorString))
	{
		objectsFile.close();
		return;
	}

// HERE is my error. isValid always become false
	bool isValid = objectsTmlValidator.validate(&objectsFile, QUrl::fromLocalFile(objectsFile.fileName()));
	objectsFile.close();

	QDomElement currentObjectElement = 
		objectsDocument.documentElement().firstChildElement().firstChildElement("Object");
	while (!currentObjectElement.isNull())
	{
		(*mapToFill)[currentObjectElement.attribute("name").toStdString()] = currentObjectElement;
		currentObjectElement = currentObjectElement.nextSiblingElement("Object");
	}
}

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