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value.h

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//  -*- c++ -*-

#ifndef XPATH_VALUE_H
#define XPATH_VALUE_H

#include <qstring.h>
#include <qcstring.h>

#include <dom/dom_node.h>
#include <dom/dom_string.h>

namespace XPath {

class Exception;
class NodeSet;
class Boolean;
class Number;
class String;

class Value
{
public:
    enum ValueType {
        ValueException, ValueNodeSet, ValueBoolean, ValueNumber, ValueString
    };

    Value() : tp(ValueException) {}
    Value( ValueType t ) : tp(t) {}
    Value( const Value &res );

    ValueType type() const { return tp; }

    Exception toException();
    NodeSet toNodeSet();
    Boolean toBoolean();
    Number toNumber();
    String toString();

    QString qstring() const;

private:
    ValueType tp;
};

class Exception : public Value
{
public:
    Exception() : Value( ValueException ) {}
    Exception( const Exception &x ) : Value(x.type()) {}
};

class NodeSet : public Value
{
public:
    NodeSet();
    NodeSet( const NodeSet &ns ) : Value(ns.type()) { this->val = ns.val; }

private:
    DOM::NodeList val;
};

class Boolean : public Value
{
public:
    Boolean();
    Boolean( const Boolean &b ) : Value(b.type()) { this->val = b.val; }

private:
    bool val;
};

class Number : public Value
{
public:
    Number();
    Number( const Number &n ) : Value(n.type()) { this->val = n.val; }

private:
    double val;
};

class String : public Value
{
public:
    String() : Value(ValueString) {}
    String( const String &s ) : Value(ValueString), val(s.val) {}
    String( const DOM::DOMString &s ) : Value(ValueString), val(s.string()) {}
    String( const QString &s ) : Value(ValueString), val(s) {}
    String( const char *s ) : Value(ValueString), val(s) {}

    QString qstring() const { return val; }
    QCString cstring() const { return val.local8Bit(); }

private:
    QString val;
};

}; // namespace XPath

#endif // XPATH_VALUE_H

// Local Variables:
// c-basic-offset: 4
// End:

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