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52 #define _composite_h 1
54 #include "object/root.h"
55 #include "storage/page_storage.h"
56 #include "object/handler.h"
58 /******************************************
59 * composite object class
60 *******************************************/
61 class composite: public root
65 NEW_AND_DELETE_SIGNATURES(composite);
67 composite(c_code_t c_id = COMPOSITE_CODE);
68 composite(const composite& x);
69 virtual ~composite() {};
71 // iteration over components
72 virtual int first() const;
73 virtual handler* get_component(int) ;
74 //virtual handler* get_component(oid_t&) ;
75 virtual void next(int& index) const;
77 // number of components
78 virtual int count() const { return v_sz; };
80 MMDB_SIGNATURES(composite);
83 virtual Boolean insert_component(const oid_t&) {
87 virtual Boolean update_component(int, const oid_t&) {
91 void set_mode(obj_mode_t, Boolean);
93 Boolean test_io_mode(int mode);
95 // compacted disk representation In and Out functions
96 virtual int cdr_sizeof();
97 virtual io_status cdrOut(buffer&);
98 virtual io_status cdrIn(buffer&);
101 Boolean swap_order() {
102 return (storage_ptr) ? storage_ptr -> swap_order() : false;
107 unsigned int v_sz; // number of components
110 typedef composite* compositePtr;
112 class composite_handler : public handler
116 composite_handler() {};
117 composite_handler(const oid_t&, storagePtr = 0);
118 virtual ~composite_handler();
120 composite* operator ->();
122 handler* _get_component(int i);