Stop using SAX classes for reading XML files

The qtxmlpatterns' tests are using SAX classes for parsing XML files.
These classes will be deprecated.

Replaced QXmlSimpleReader by QDomDocument where applicable.

For the test suite handlers inheriting from QXmlDefaultHandler, introduced
the XmlParseHelper base class, which drives the parsing loop and allows
overriding the methods for handling different XML tokens.

Task-number: QTBUG-76177
Change-Id: Ia1a60c898a272906ede459e95ced7ec95d154fde
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 106 insertions, 0 deletions

diff --git a/tests/auto/xmlpatternssdk/XmlParseHelper.cpp b/tests/auto/xmlpatternssdk/XmlParseHelper.cpp
new file mode 100644
index 0000000..7629753
--- /dev/null
+++ b/tests/auto/xmlpatternssdk/XmlParseHelper.cpp
@@ -0,0 +1,106 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "XmlParseHelper.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternistSDK {
+
+bool XmlParseHelper::parse(QIODevice *input)
+{
+    QXmlStreamReader reader(input);
+
+    while (!reader.atEnd()) {
+        reader.readNext();
+        if (reader.hasError())
+            return false;
+
+        switch (reader.tokenType()) {
+        case QXmlStreamReader::StartElement:
+            if (!startElement(reader.namespaceUri(), reader.name(),
+                              reader.qualifiedName(), reader.attributes())) {
+                return false;
+            }
+            break;
+        case QXmlStreamReader::EndElement:
+            if (!endElement(reader.namespaceUri(), reader.name(),
+                            reader.qualifiedName())) {
+                return false;
+            }
+            break;
+        case QXmlStreamReader::Characters:
+            if (!reader.isWhitespace() && !reader.text().toString().trimmed().isEmpty()) {
+                if (!characters(reader.text()))
+                    return false;
+            }
+            break;
+        default:
+            break;
+        }
+    }
+
+    if (reader.isEndDocument() && !endDocument())
+        return false;
+
+    return true;
+}
+
+bool XmlParseHelper::startElement(const QStringRef &namespaceURI, const QStringRef &localName,
+                                  const QStringRef &qName, const QXmlStreamAttributes &atts)
+{
+    Q_UNUSED(namespaceURI)
+    Q_UNUSED(localName)
+    Q_UNUSED(qName)
+    Q_UNUSED(atts)
+    return true;
+}
+
+bool XmlParseHelper::endElement(const QStringRef &namespaceURI, const QStringRef &localName,
+                                const QStringRef &qName)
+{
+    Q_UNUSED(namespaceURI)
+    Q_UNUSED(localName)
+    Q_UNUSED(qName)
+    return true;
+}
+
+bool XmlParseHelper::characters(const QStringRef &text)
+{
+    Q_UNUSED(text)
+    return true;
+}
+
+bool XmlParseHelper::endDocument()
+{
+    return true;
+}
+
+} // namespace QPatternistSDK
+
+QT_END_NAMESPACE