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#include <QUrl>

#include <QVector>

#include <QXmlNamePool>

#include "qabstractxmlnodemodel_p.h"

#include "qemptyiterator_p.h"

#include "qitemmappingiterator_p.h"

#include "qsequencemappingiterator_p.h"

#include "qsimplexmlnodemodel.h"

#include "qsingletoniterator_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

class QSimpleXmlNodeModelPrivate : public QAbstractXmlNodeModelPrivate

{

public:

    QSimpleXmlNodeModelPrivate(const QXmlNamePool &np) : namePool(np)

    {

    }

    mutable QXmlNamePool namePool;

};

/*!

  \class QSimpleXmlNodeModel

  \brief The QSimpleXmlNodeModel class is an implementation of QAbstractXmlNodeModel sufficient for many common cases.

  \reentrant

  \since 4.4

  \ingroup xml-tools

  Subclassing QAbstractXmlNodeModel can be a significant task, because it

  requires implementing several, complex member functions. QSimpleXmlNodeModel

  provides default implementations of these member functions that are suitable

  for a wide range of node models.

  Subclasses of QSimpleXmlNodeModel must be thread-safe.

 */

/*!

  Constructs a QSimpleXmlNodeModel for use with with the specified

  \a namePool.

 */

QSimpleXmlNodeModel::QSimpleXmlNodeModel(const QXmlNamePool &namePool)

  : QAbstractXmlNodeModel(new QSimpleXmlNodeModelPrivate(namePool))

{

}

/*!

  Destructor.

 */

QSimpleXmlNodeModel::~QSimpleXmlNodeModel()

{

}

/*!

 If \a node is an element or attribute, typedValue() is called, and

 the return value converted to a string, as per XQuery's rules.

 If \a node is another type of node, the empty string is returned.

 If this function is overridden for comments or processing

 instructions, it is important to remember to call it (for elements

 and attributes having values not of type \c xs:string) to ensure that

 the values are formatted according to XQuery.

 */

QString QSimpleXmlNodeModel::stringValue(const QXmlNodeModelIndex &node) const

{

    const QXmlNodeModelIndex::NodeKind k= kind(node);

    if(k == QXmlNodeModelIndex::Element || k == QXmlNodeModelIndex::Attribute)

    {

        const QVariant &candidate = typedValue(node);

        if(candidate.isNull())

            return QString();

        else

            return AtomicValue::toXDM(candidate).stringValue();

    }

    else

        return QString();

}

/*!

  Returns the base URI for \a node. This is always the document

  URI.

  \sa documentUri()

 */

QUrl QSimpleXmlNodeModel::baseUri(const QXmlNodeModelIndex &node) const

{

    return documentUri(node);

}

/*!

  Returns the name pool associated with this model. The

  implementation of name() will use this name pool to create

  names.

 */

QXmlNamePool &QSimpleXmlNodeModel::namePool() const

{

    Q_D(const QSimpleXmlNodeModel);

    return d->namePool;

}

/*!

  Always returns an empty QVector. This signals that no namespace

  bindings are in scope for \a node.

 */

QVector<QXmlName> QSimpleXmlNodeModel::namespaceBindings(const QXmlNodeModelIndex &node) const

{

    Q_UNUSED(node);

    return QVector<QXmlName>();

}

/*!

  Always returns a default constructed QXmlNodeModelIndex instance,

  regardless of \a id.

  This effectively means the model has no elements that have an id.

 */

QXmlNodeModelIndex QSimpleXmlNodeModel::elementById(const QXmlName &id) const

{

    Q_UNUSED(id);

    return QXmlNodeModelIndex();

}

/*!

  Always returns an empty vector, regardless of \a idref.

  This effectively means the model has no elements or attributes of

  type \c IDREF.

 */

QVector<QXmlNodeModelIndex> QSimpleXmlNodeModel::nodesByIdref(const QXmlName &idref) const

{

    Q_UNUSED(idref);

    return QVector<QXmlNodeModelIndex>();

}

QT_END_NAMESPACE