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Diffstat (limited to 'src/xmlpatterns/api/qxmlschemavalidator.cpp')
| -rw-r--r-- | src/xmlpatterns/api/qxmlschemavalidator.cpp | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/src/xmlpatterns/api/qxmlschemavalidator.cpp b/src/xmlpatterns/api/qxmlschemavalidator.cpp new file mode 100644 index 0000000..a864d40 --- /dev/null +++ b/src/xmlpatterns/api/qxmlschemavalidator.cpp @@ -0,0 +1,344 @@ +/**************************************************************************** +** +** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtXmlPatterns 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qxmlschemavalidator.h" +#include "qxmlschemavalidator_p.h" + +#include "qacceltreeresourceloader_p.h" +#include "qxmlschema.h" +#include "qxmlschema_p.h" +#include "qxsdvalidatinginstancereader_p.h" + +#include <QtCore/QBuffer> +#include <QtCore/QIODevice> +#include <QtCore/QUrl> + +QT_BEGIN_NAMESPACE + +/*! + \class QXmlSchemaValidator + + \brief The QXmlSchemaValidator class validates XML instance documents against a W3C XML Schema. + + \reentrant + \since 4.6 + \ingroup xml-tools + + The QXmlSchemaValidator class loads, parses an XML instance document and validates it + against a W3C XML Schema that has been compiled with \l{QXmlSchema}. + + The following example shows how to load a XML Schema from a local + file, check whether it is a valid schema document and use it for validation + of an XML instance document: + + \snippet doc/src/snippets/qxmlschemavalidator/main.cpp 3 + + \sa QXmlSchema, {xmlpatterns/schema}{XML Schema Validation Example} +*/ + +/*! + Constructs a schema validator. + The schema used for validation must be referenced in the XML instance document + via the \c xsi:schemaLocation or \c xsi:noNamespaceSchemaLocation attribute. + */ +QXmlSchemaValidator::QXmlSchemaValidator() + : d(new QXmlSchemaValidatorPrivate(QXmlSchema())) +{ +} + +/*! + Constructs a schema validator that will use \a schema for validation. + If an empty \l {QXmlSchema} schema is passed to the validator, the schema used + for validation must be referenced in the XML instance document + via the \c xsi:schemaLocation or \c xsi:noNamespaceSchemaLocation attribute. + */ +QXmlSchemaValidator::QXmlSchemaValidator(const QXmlSchema &schema) + : d(new QXmlSchemaValidatorPrivate(schema)) +{ +} + +/*! + Destroys this QXmlSchemaValidator. + */ +QXmlSchemaValidator::~QXmlSchemaValidator() +{ + delete d; +} + +/*! + Sets the \a schema that shall be used for further validation. + If the schema is empty, the schema used for validation must be referenced + in the XML instance document via the \c xsi:schemaLocation or + \c xsi:noNamespaceSchemaLocation attribute. + */ +void QXmlSchemaValidator::setSchema(const QXmlSchema &schema) +{ + d->setSchema(schema); +} + +/*! + Validates the XML instance document read from \a data with the + given \a documentUri against the schema. + + Returns \c true if the XML instance document is valid according to the + schema, \c false otherwise. + + Example: + + \snippet doc/src/snippets/qxmlschemavalidator/main.cpp 2 + */ +bool QXmlSchemaValidator::validate(const QByteArray &data, const QUrl &documentUri) const +{ + QByteArray localData(data); + + QBuffer buffer(&localData); + buffer.open(QIODevice::ReadOnly); + + return validate(&buffer, documentUri); +} + +/*! + Validates the XML instance document read from \a source against the schema. + + Returns \c true if the XML instance document is valid according to the + schema, \c false otherwise. + + Example: + + \snippet doc/src/snippets/qxmlschemavalidator/main.cpp 0 + */ +bool QXmlSchemaValidator::validate(const QUrl &source) const +{ + d->m_context->setMessageHandler(messageHandler()); + d->m_context->setUriResolver(uriResolver()); + d->m_context->setNetworkAccessManager(networkAccessManager()); + + const QPatternist::AutoPtr<QNetworkReply> reply(QPatternist::AccelTreeResourceLoader::load(source, d->m_context->networkAccessManager(), + d->m_context, QPatternist::AccelTreeResourceLoader::ContinueOnError)); + if (reply) + return validate(reply.data(), source); + else + return false; +} + +/*! + Validates the XML instance document read from \a source with the + given \a documentUri against the schema. + + Returns \c true if the XML instance document is valid according to the + schema, \c false otherwise. + + Example: + + \snippet doc/src/snippets/qxmlschemavalidator/main.cpp 1 + */ +bool QXmlSchemaValidator::validate(QIODevice *source, const QUrl &documentUri) const +{ + if (!source) { + qWarning("A null QIODevice pointer cannot be passed."); + return false; + } + + if (!source->isReadable()) { + qWarning("The device must be readable."); + return false; + } + + const QUrl normalizedUri = QPatternist::XPathHelper::normalizeQueryURI(documentUri); + + d->m_context->setMessageHandler(messageHandler()); + d->m_context->setUriResolver(uriResolver()); + d->m_context->setNetworkAccessManager(networkAccessManager()); + + QPatternist::NetworkAccessDelegator::Ptr delegator(new QPatternist::NetworkAccessDelegator(d->m_context->networkAccessManager(), + d->m_context->networkAccessManager())); + + QPatternist::AccelTreeResourceLoader loader(d->m_context->namePool(), delegator, QPatternist::AccelTreeBuilder<true>::SourceLocationsFeature); + + QPatternist::Item item; + try { + item = loader.openDocument(source, normalizedUri, d->m_context); + } catch (QPatternist::Exception exception) { + return false; + } + + QXmlNodeModelIndex index = item.asNode(); + const QAbstractXmlNodeModel *model = item.asNode().model(); + + QPatternist::XsdValidatedXmlNodeModel *validatedModel = new QPatternist::XsdValidatedXmlNodeModel(model); + + QPatternist::XsdValidatingInstanceReader reader(validatedModel, normalizedUri, d->m_context); + if (d->m_schema) + reader.addSchema(d->m_schema, d->m_schemaDocumentUri); + try { + reader.read(); + } catch (QPatternist::Exception exception) { + return false; + } + + return true; +} + +/*! + Returns the name pool used by this QXmlSchemaValidator for constructing \l + {QXmlName} {names}. There is no setter for the name pool, because + mixing name pools causes errors due to name confusion. + */ +QXmlNamePool QXmlSchemaValidator::namePool() const +{ + return d->m_namePool; +} + +/*! + Returns the schema that is used for validation. + */ +QXmlSchema QXmlSchemaValidator::schema() const +{ + return d->m_originalSchema; +} + +/*! + Changes the \l {QAbstractMessageHandler}{message handler} for this + QXmlSchemaValidator to \a handler. The schema validator sends all parsing and + validation messages to this message handler. QXmlSchemaValidator does not take + ownership of \a handler. + + Normally, the default message handler is sufficient. It writes + compile and validation messages to \e stderr. The default message + handler includes color codes if \e stderr can render colors. + + When QXmlSchemaValidator calls QAbstractMessageHandler::message(), + the arguments are as follows: + + \table + \header + \o message() argument + \o Semantics + \row + \o QtMsgType type + \o Only QtWarningMsg and QtFatalMsg are used. The former + identifies a warning, while the latter identifies an error. + \row + \o const QString & description + \o An XHTML document which is the actual message. It is translated + into the current language. + \row + \o const QUrl &identifier + \o Identifies the error with a URI, where the fragment is + the error code, and the rest of the URI is the error namespace. + \row + \o const QSourceLocation & sourceLocation + \o Identifies where the error occurred. + \endtable + + */ +void QXmlSchemaValidator::setMessageHandler(QAbstractMessageHandler *handler) +{ + d->m_userMessageHandler = handler; +} + +/*! + Returns the message handler that handles parsing and validation + messages for this QXmlSchemaValidator. + */ +QAbstractMessageHandler *QXmlSchemaValidator::messageHandler() const +{ + if (d->m_userMessageHandler) + return d->m_userMessageHandler; + + return d->m_messageHandler.data()->value; +} + +/*! + Sets the URI resolver to \a resolver. QXmlSchemaValidator does not take + ownership of \a resolver. + + \sa uriResolver() + */ +void QXmlSchemaValidator::setUriResolver(const QAbstractUriResolver *resolver) +{ + d->m_uriResolver = resolver; +} + +/*! + Returns the schema's URI resolver. If no URI resolver has been set, + QtXmlPatterns will use the URIs in instance documents as they are. + + The URI resolver provides a level of abstraction, or \e{polymorphic + URIs}. A resolver can rewrite \e{logical} URIs to physical ones, or + it can translate obsolete or invalid URIs to valid ones. + + When QtXmlPatterns calls QAbstractUriResolver::resolve() the + absolute URI is the URI mandated by the schema specification, and the + relative URI is the URI specified by the user. + + \sa setUriResolver() + */ +const QAbstractUriResolver *QXmlSchemaValidator::uriResolver() const +{ + return d->m_uriResolver; +} + +/*! + Sets the network manager to \a manager. + QXmlSchemaValidator does not take ownership of \a manager. + + \sa networkAccessManager() + */ +void QXmlSchemaValidator::setNetworkAccessManager(QNetworkAccessManager *manager) +{ + d->m_userNetworkAccessManager = manager; +} + +/*! + Returns the network manager, or 0 if it has not been set. + + \sa setNetworkAccessManager() + */ +QNetworkAccessManager *QXmlSchemaValidator::networkAccessManager() const +{ + if (d->m_userNetworkAccessManager) + return d->m_userNetworkAccessManager; + + return d->m_networkAccessManager.data()->value; +} + +QT_END_NAMESPACE |