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/****************************************************************************
**
** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the $MODULE$ of the Qt Toolkit.
**
** $TROLLTECH_DUAL_LICENSE$
**
****************************************************************************/
//
// 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_XsdIdentityConstraint_H
#define Patternist_XsdIdentityConstraint_H
#include "qnamedschemacomponent_p.h"
#include "qxsdannotated_p.h"
#include "qxsdxpathexpression_p.h"
#include <QtCore/QStringList>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Represents a XSD identity constraint object.
*
* This class represents the <em>identity constraint</em> object of a XML schema as described
* <a href="http://www.w3.org/TR/xmlschema11-1/#cIdentity-constraint_Definitions">here</a>.
*
* It contains information from either a <em>key</em> object, a <em>keyref</em> object or an
* <em>unique</em> object.
*
* @see <a href="http://www.w3.org/Submission/2004/SUBM-xmlschema-api-20040309/xml-schema-api.html#Interface-XSIdentityConstraint">XML Schema API reference</a>
* @ingroup Patternist_schema
* @author Tobias Koenig <tobias.koenig@trolltech.com>
*/
class XsdIdentityConstraint : public NamedSchemaComponent, public XsdAnnotated
{
public:
typedef QExplicitlySharedDataPointer<XsdIdentityConstraint> Ptr;
typedef QList<XsdIdentityConstraint::Ptr> List;
/**
* Describes the <a href="http://www.w3.org/TR/xmlschema11-1/#icd-identity-constraint_category">category</a> of the identity constraint.
*/
enum Category
{
Key = 1, ///< The constraint is a key constraint
KeyReference, ///< The constraint is a keyref constraint
Unique ///< The constraint is an unique constraint
};
/**
* Sets the @p category of the identity constraint.
*
* @see Category
*/
void setCategory(Category category);
/**
* Returns the category of the identity constraint.
*/
Category category() const;
/**
* Sets the @p selector of the identity constraint.
*
* The selector is a restricted XPath 1.0 expression,
* that selects a set of nodes.
*
* @see <a href="http://www.w3.org/TR/xmlschema11-1/#icd-selector"></a>
*/
void setSelector(const XsdXPathExpression::Ptr &selector);
/**
* Returns the selector of the identity constraint.
*/
XsdXPathExpression::Ptr selector() const;
/**
* Sets the @p fields of the identity constraint.
*
* Each field is a restricted XPath 1.0 expression,
* that selects a set of nodes.
*
* @see <a href="http://www.w3.org/TR/xmlschema11-1/#icd-fields"></a>
*/
void setFields(const XsdXPathExpression::List &fields);
/**
* Adds a new @p field to the identity constraint.
*/
void addField(const XsdXPathExpression::Ptr &field);
/**
* Returns all fields of the identity constraint.
*/
XsdXPathExpression::List fields() const;
/**
* Sets the referenced @p key of the identity constraint.
*
* The key points to a identity constraint of type Key or Unique.
*
* The identity constraint has only a referenced key if its
* type is KeyReference.
*
* @see <a href="http://www.w3.org/TR/xmlschema11-1/#icd-referenced_key"></a>
*/
void setReferencedKey(const XsdIdentityConstraint::Ptr &key);
/**
* Returns the referenced key of the identity constraint or an empty
* pointer if its type is not KeyReference.
*/
XsdIdentityConstraint::Ptr referencedKey() const;
private:
Category m_category;
XsdXPathExpression::Ptr m_selector;
XsdXPathExpression::List m_fields;
XsdIdentityConstraint::Ptr m_referencedKey;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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