source: trunk/src/xmlpatterns/schema/qxsdstatemachinebuilder.cpp@ 729

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#include "qxsdstatemachinebuilder_p.h"

#include "qxsdelement_p.h"
#include "qxsdmodelgroup_p.h"
#include "qxsdschemahelper_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

/*
 * This methods takes a list of objects and returns a list of list
 * of all combinations the objects can be ordered.
 *
 * e.g. input = [ 1, 2, 3 ]
 *      output = [
 *                  [ 1, 2, 3 ],
 *                  [ 1, 3, 2 ],
 *                  [ 2, 1, 3 ],
 *                  [ 2, 3, 1 ],
 *                  [ 3, 1, 2 ],
 *                  [ 3, 2, 1 ]
 *               ]
 *
 * The method is used to create all possible combinations for the particles
 * in an <all> model group.
 */
template <typename T>
QList< QList<T> > allCombinations(const QList<T> &input)
{
    if (input.count() == 1)
        return (QList< QList<T> >() << input);

    QList< QList<T> > result;
    for (int i = 0; i < input.count(); ++i) {
        QList<T> subList = input;
        T value = subList.takeAt(i);

        QList< QList<T> > subLists = allCombinations(subList);
        for (int j = 0; j < subLists.count(); ++j) {
            subLists[j].prepend(value);
        }
        result << subLists;
    }

    return result;
}

XsdStateMachineBuilder::XsdStateMachineBuilder(XsdStateMachine<XsdTerm::Ptr> *machine, const NamePool::Ptr &namePool, Mode mode)
    : m_stateMachine(machine), m_namePool(namePool), m_mode(mode)
{
}

XsdStateMachine<XsdTerm::Ptr>::StateId XsdStateMachineBuilder::reset()
{
    Q_ASSERT(m_stateMachine);

    m_stateMachine->clear();

    return m_stateMachine->addState(XsdStateMachine<XsdTerm::Ptr>::EndState);
}

XsdStateMachine<XsdTerm::Ptr>::StateId XsdStateMachineBuilder::addStartState(XsdStateMachine<XsdTerm::Ptr>::StateId state)
{
    const XsdStateMachine<XsdTerm::Ptr>::StateId startState = m_stateMachine->addState(XsdStateMachine<XsdTerm::Ptr>::StartState);