1 files changed, 212 insertions, 0 deletions
diff --git a/examples/corelib/serialization/convert/jsonconverter.cpp b/examples/corelib/serialization/convert/jsonconverter.cpp
new file mode 100644
index 0000000000..80d1cc6827
--- /dev/null
+++ b/examples/corelib/serialization/convert/jsonconverter.cpp
@@ -0,0 +1,212 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 Intel Corporation.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "jsonconverter.h"
+
+#include <QFile>
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonValue>
+
+static JsonConverter jsonConverter;
+static BinaryJsonConverter BinaryJsonConverter;
+
+static const char optionHelp[] =
+        "compact=no|yes              Use compact JSON form.\n";
+
+static QJsonDocument convertFromVariant(const QVariant &v)
+{
+    QJsonDocument doc = QJsonDocument::fromVariant(v);
+    if (!doc.isObject() && !doc.isArray()) {
+        fprintf(stderr, "Could not convert contents to JSON.\n");
+        exit(EXIT_FAILURE);
+    }
+    return doc;
+}
+
+JsonConverter::JsonConverter()
+{
+}
+
+QString JsonConverter::name()
+{
+    return "json";
+}
+
+Converter::Direction JsonConverter::directions()
+{
+    return InOut;
+}
+
+Converter::Options JsonConverter::outputOptions()
+{
+    return {};
+}
+
+const char *JsonConverter::optionsHelp()
+{
+    return optionHelp;
+}
+
+bool JsonConverter::probeFile(QIODevice *f)
+{
+    if (QFile *file = qobject_cast<QFile *>(f)) {
+        if (file->fileName().endsWith(QLatin1String(".json")))
+            return true;
+    }
+
+    if (f->isReadable()) {
+        QByteArray ba = f->peek(1);
+        return ba == "{" || ba == "[";
+    }
+    return false;
+}
+
+QVariant JsonConverter::loadFile(QIODevice *f, Converter *&outputConverter)
+{
+    if (!outputConverter)
+        outputConverter = this;
+
+    QJsonParseError error;
+    QJsonDocument doc;
+    if (auto file = qobject_cast<QFile *>(f)) {
+        const char *ptr = reinterpret_cast<char *>(file->map(0, file->size()));
+        if (ptr)
+            doc = QJsonDocument::fromJson(QByteArray::fromRawData(ptr, file->size()), &error);
+    }
+
+    if (doc.isNull())
+        doc = QJsonDocument::fromJson(f->readAll(), &error);
+    if (error.error) {
+        fprintf(stderr, "Could not parse JSON content: offset %d: %s",
+                error.offset, qPrintable(error.errorString()));
+        exit(EXIT_FAILURE);
+    }
+    if (outputConverter == null)
+        return QVariant();
+    return doc.toVariant();
+}
+
+void JsonConverter::saveFile(QIODevice *f, const QVariant &contents, const QStringList &options)
+{
+    QJsonDocument::JsonFormat format = QJsonDocument::Indented;
+    for (const QString &s : options) {
+        if (s == QLatin1String("compact=no")) {
+            format = QJsonDocument::Indented;
+        } else if (s == QLatin1String("compact=yes")) {
+            format = QJsonDocument::Compact;
+        } else {
+            fprintf(stderr, "Unknown option '%s' to JSON output. Valid options are:\n%s", qPrintable(s), optionHelp);
+            exit(EXIT_FAILURE);
+        }
+    }
+
+    f->write(convertFromVariant(contents).toJson(format));
+}
+
+QString BinaryJsonConverter::name()
+{
+    return "binary-json";
+}
+
+Converter::Direction BinaryJsonConverter::directions()
+{
+    return InOut;
+}
+
+Converter::Options BinaryJsonConverter::outputOptions()
+{
+    return {};
+}
+
+const char *BinaryJsonConverter::optionsHelp()
+{
+    return nullptr;
+}
+
+bool BinaryJsonConverter::probeFile(QIODevice *f)
+{
+    return f->isReadable() && f->peek(4) == "qbjs";
+}
+
+QVariant BinaryJsonConverter::loadFile(QIODevice *f, Converter *&outputConverter)
+{
+    if (!outputConverter)
+        outputConverter = &jsonConverter;
+
+    QJsonDocument doc;
+    if (auto file = qobject_cast<QFile *>(f)) {
+        uchar *ptr = file->map(0, file->size());
+        if (ptr)
+            doc = QJsonDocument::fromRawData(reinterpret_cast<char *>(ptr), file->size());
+    }
+
+    if (doc.isNull())
+        doc = QJsonDocument::fromBinaryData(f->readAll());
+
+    if (!doc.isObject() && !doc.isArray()) {
+        fprintf(stderr, "Failed to load Binary JSON.\n");
+        exit(EXIT_FAILURE);
+    }
+    if (outputConverter == null)
+        return QVariant();
+    return doc.toVariant();
+}
+
+void BinaryJsonConverter::saveFile(QIODevice *f, const QVariant &contents, const QStringList &options)
+{
+    if (!options.isEmpty()) {
+        fprintf(stderr, "Unknown option '%s' to JSON output. This format has no options.\n", qPrintable(options.first()));
+        exit(EXIT_FAILURE);
+    }
+
+    f->write(convertFromVariant(contents).toBinaryData());
+}