/*
 * Copyright 2008, Haiku.
 * Distributed under the terms of the MIT license.
 *
 * Authors:
 *              Michael Pfeiffer <laplace@users.sourceforge.net>
 */

#ifndef _STATEMENT_H
#define _STATEMENT_H

#include "StatementList.h"
#include "Value.h"

class Statement
{
public:
        enum Type {
                kDefault,
                kQuery,
                kValue,
                kParam,
                kUnknown
        };

private:
        Type           fType;
        BString*       fKeyword;
        Value*         fOption;
        Value*         fValue;
        StatementList* fChildren;

        const char* ElementForType();
        
public:
        Statement();
        virtual ~Statement();
        
        void SetType(Type type);        
        Type GetType();
        
        void SetKeyword(BString* keyword);
        // mandatory in a valid statement
        BString* GetKeyword();

        void SetOption(Value* value);   
        // optional in a valid statement
        Value* GetOption();

        void SetValue(Value* value);
        // optional in a valid statement
        Value* GetValue(); 

        void AddChild(Statement* statement);
        // optional in a valid statement
        StatementList* GetChildren();
        
        // convenience methods
        bool IsDefaultStatement() { return fType == kDefault; }
        bool IsQueryStatement()   { return fType == kQuery; }
        bool IsValueStatement()   { return fType == kValue; }
        bool IsParamStatement()   { return fType == kParam; }
        bool IsUnknownStatement() { return fType == kUnknown; }
        
        const char* GetKeywordString();
        const char* GetOptionString();
        const char* GetTranslationString();
        const char* GetValueString();
        const char* GetValueTranslationString();
        
        void Print();
};

#endif