src/xmlpatterns/api/qsimplexmlnodemodel.cpp
changeset 0 1918ee327afb
child 4 3b1da2848fc7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/api/qsimplexmlnodemodel.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,184 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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
+
+