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December 28, 2022 19:44
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Sample function for parsing a QXmlStreamReader (or part thereof) to a QVariant tree.
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| QVariantMap xmlStreamToVariant(QXmlStreamReader &xml, const QString &prefix = QLatin1String("."), const int maxDepth = 1024) | |
| { | |
| if (maxDepth < 0) { | |
| qWarning() << QObject::tr("max depth exceeded"); | |
| return QVariantMap(); | |
| } | |
| if (xml.hasError()) { | |
| qWarning() << xml.errorString(); | |
| return QVariantMap(); | |
| } | |
| if (xml.tokenType() == QXmlStreamReader::NoToken) | |
| xml.readNext(); | |
| if ((xml.tokenType() != QXmlStreamReader::StartDocument) && | |
| (xml.tokenType() != QXmlStreamReader::StartElement)) { | |
| qWarning() << QObject::tr("unexpected XML tokenType %1 (%2)") | |
| .arg(xml.tokenString()).arg(xml.tokenType()); | |
| return QVariantMap(); | |
| } | |
| QVariantMap map; | |
| if (xml.tokenType() == QXmlStreamReader::StartDocument) { | |
| map.insert(prefix + QLatin1String("DocumentEncoding"), xml.documentEncoding().toString()); | |
| map.insert(prefix + QLatin1String("DocumentVersion"), xml.documentVersion().toString()); | |
| map.insert(prefix + QLatin1String("StandaloneDocument"), xml.isStandaloneDocument()); | |
| } else { | |
| if (!xml.namespaceUri().isEmpty()) | |
| map.insert(prefix + QLatin1String("NamespaceUri"), xml.namespaceUri().toString()); | |
| foreach (const QXmlStreamAttribute &attribute, xml.attributes()) { | |
| QVariantMap attributeMap; | |
| attributeMap.insert(QLatin1String("Value"), attribute.value().toString()); | |
| if (!attribute.namespaceUri().isEmpty()) | |
| attributeMap.insert(QLatin1String("NamespaceUri"), attribute.namespaceUri().toString()); | |
| if (!attribute.prefix().isEmpty()) | |
| attributeMap.insert(QLatin1String("Prefix"), attribute.prefix().toString()); | |
| attributeMap.insert(QLatin1String("QualifiedName"), attribute.qualifiedName().toString()); | |
| map.insertMulti(prefix + attribute.name().toString(), attributeMap); | |
| } | |
| } | |
| for (xml.readNext(); (!xml.atEnd()) && (xml.tokenType() != QXmlStreamReader::EndElement) | |
| && (xml.tokenType() != QXmlStreamReader::EndDocument); xml.readNext()) { | |
| switch (xml.tokenType()) { | |
| case QXmlStreamReader::Characters: | |
| case QXmlStreamReader::Comment: | |
| case QXmlStreamReader::DTD: | |
| case QXmlStreamReader::EntityReference: | |
| map.insertMulti(prefix + xml.tokenString(), xml.text().toString()); | |
| break; | |
| case QXmlStreamReader::ProcessingInstruction: | |
| map.insertMulti(prefix + xml.processingInstructionTarget().toString(), | |
| xml.processingInstructionData().toString()); | |
| break; | |
| case QXmlStreamReader::StartElement: | |
| map.insertMulti(xml.name().toString(), xmlStreamToVariant(xml, prefix, maxDepth-1)); | |
| break; | |
| default: | |
| qWarning() << QObject::tr("unexpected XML tokenType %1 (%2)") | |
| .arg(xml.tokenString()).arg(xml.tokenType()); | |
| } | |
| } | |
| return map; | |
| } |
What is 'toVariant'?
@chakani, oops. toVariant was the original name I gave the function... ie its recursive. I'll fix that up now (only three years late 😆)
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I originally wrote this as part of a libqtaws (AWS SDK for Qt) library I'm working on. But ended up not using it (yet).