VR-Forces 4.0.4 Class Documentation: include/vrfobjcore/vrfObjPred.h Source File

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00001 /*******************************************************************************
00002 ** Copyright (c) 2001 MAK Technologies, Inc.
00003 ** All rights reserved.
00004 *******************************************************************************/
00005 /*******************************************************************************
00006 ** $RCSfile: vrfObjPred.h,v $ $Revision: 1.14 $ $State: Exp $
00007 *******************************************************************************/
00008 #ifndef vrfObjPred_H_
00009 #define vrfObjPred_H_
00010 
00013 
00015 
00016 
00017 #include <vlutil/vlMachineTypes.h>
00018 
00019 class DtVrfObject;
00020 
00024 #include "vrfobjcore/vrfobjcoreDefines.h"
00025 class DT_DLL_vrfobjcore DtVrfObjectPredicate
00026 {
00027 public:
00028 
00030    DtVrfObjectPredicate(bool negate = false);
00031 
00033    virtual ~DtVrfObjectPredicate();
00034 
00036    DtVrfObjectPredicate(const DtVrfObjectPredicate& orig);
00037 
00039    DtVrfObjectPredicate& operator=(const DtVrfObjectPredicate& orig);
00040 
00042    virtual DtVrfObjectPredicate* clone() const = 0;
00043 
00047    bool operator==(const DtVrfObjectPredicate& orig) const;
00048    bool operator!=(const DtVrfObjectPredicate& orig) const;
00049 
00050    virtual bool negated() const;
00051    virtual void setNegate(bool negate);
00052 
00055    bool isTrue(const DtVrfObject* vrfObject);
00056 
00057 public:
00058 
00060    static const DtVrfObjectPredicate& nullPredicate();
00061 
00062 protected:
00063 
00066    virtual bool eval(const DtVrfObject* vrfObject) = 0;
00067 
00077    virtual bool predicateEqual(const DtVrfObjectPredicate& orig) const;
00078 
00079 protected:
00080 
00081    bool myNegated;
00082 };
00083 
00084 #endif