--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/expr/qexpressionfactory_p.h Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,187 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef Patternist_ExpressionFactory_H
+#define Patternist_ExpressionFactory_H
+
+#include <QXmlQuery>
+
+#include "qexpression_p.h"
+#include "qtokenizer_p.h"
+
+#include <QSharedData>
+#include <QUrl>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QIODevice;
+
+namespace QPatternist
+{
+ /**
+ * @short The central entry point for compiling expressions.
+ *
+ * @ingroup Patternist_expressions
+ * @author Frans Englich <frans.englich@nokia.com>
+ */
+ class Q_AUTOTEST_EXPORT ExpressionFactory : public QSharedData
+ {
+ public:
+ typedef QExplicitlySharedDataPointer<ExpressionFactory> Ptr;
+
+ /**
+ * @short This constructor cannot be synthesized since we
+ * use the Q_DISABLE_COPY macro.
+ */
+ inline ExpressionFactory()
+ {
+ }
+
+ virtual ~ExpressionFactory()
+ {
+ }
+
+ enum CompilationStage
+ {
+ QueryBodyInitial = 1,
+ QueryBodyTypeCheck = 1 << 1,
+ QueryBodyCompression = 1 << 2,
+ UserFunctionTypeCheck = 1 << 3,
+ UserFunctionCompression = 1 << 4,
+ GlobalVariableTypeCheck = 1 << 5
+ };
+
+ /**
+ * Creates a compiled representation of the XPath expression @p expr, with Static
+ * Context information supplied via @p context. This is for example whether the expression
+ * is an XPath 1.0 or XPath 2.0 expression, or what functions that are available.
+ *
+ * @p requiredType specifies what type results of the evaluating the expression
+ * must match. Passing CommonValues::ZeroOrMoreItems allows anything as result, while
+ * passing CommonSequenceTypes::EBV means anything but an Effective %Boolean Value extractable
+ * result is a type error, for example.
+ *
+ * @note An empty @p expr is an invalid XPath expression. It will be reported as such,
+ * but it is neverthless the caller's resonsibility to ensure that it's not that(since
+ * it is likely invalid already in the medium it was stored).
+ */
+ virtual Expression::Ptr createExpression(const QString &expr,
+ const StaticContext::Ptr &context,
+ const QXmlQuery::QueryLanguage lang,
+ const SequenceType::Ptr &requiredType,
+ const QUrl &queryURI,
+ const QXmlName &initialTemplateName);
+
+ virtual Expression::Ptr createExpression(QIODevice *const device,
+ const StaticContext::Ptr &context,
+ const QXmlQuery::QueryLanguage lang,
+ const SequenceType::Ptr &requiredType,
+ const QUrl &queryURI,
+ const QXmlName &initialTemplateName);
+
+ /**
+ * Finds the last paths of a set of paths(if any) and tells the Path
+ * so, such that it can generate the code for checking XPTY0018.
+ *
+ * Must be called before typeCheck() is called on the operand, since
+ * the typeCheck() uses the information for type checking.
+ */
+ static void registerLastPath(const Expression::Ptr &operand);
+
+ protected:
+ enum TemplateCompilationStage
+ {
+ TemplateInitial = 1,
+ TemplateTypeCheck = 1 << 1,
+ TemplateCompress = 1 << 2
+ };
+
+ /**
+ * This function is called by createExpression() each time
+ * after a pass on the AST has been completed. Under a typical
+ * compilation this function is thus called three times: after the initial
+ * build, after the Expression::typeCheck() stage, and after
+ * Expression::compress(). @p tree is the AST after each pass.
+ *
+ * This mechanism is currently used for debugging, since it provides a
+ * way of introspecting what the compilation process do to the tree. The
+ * current implementation do nothing.
+ */
+ virtual void processTreePass(const Expression::Ptr &tree,
+ const CompilationStage stage);
+
+ virtual void processTemplateRule(const Expression::Ptr &body,
+ const TemplatePattern::Ptr &pattern,
+ const QXmlName &mode,
+ const TemplateCompilationStage stage);
+
+ virtual void processNamedTemplate(const QXmlName &name,
+ const Expression::Ptr &tree,
+ const TemplateCompilationStage stage);
+
+ Expression::Ptr createExpression(const Tokenizer::Ptr &tokenizer,
+ const StaticContext::Ptr &context,
+ const QXmlQuery::QueryLanguage lang,
+ const SequenceType::Ptr &requiredType,
+ const QUrl &queryURI,
+ const QXmlName &initialTemplateName);
+ private:
+ Q_DISABLE_COPY(ExpressionFactory)
+ };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif