neodatis.odb 第五篇 保存

  ODB odb = null;
  Sport soccer = new Sport("足球");  
  
  SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd");
  Player 亨利 = new Player("蒂埃里·亨利", format.parse("1977-8-17"), soccer);
  try {
   odb = ODBFactory.open("test.odb");
   OID oid1 = odb.store(亨利);
……

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
１／４								２／４								３／４								４／４
database id								database id								database id
31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60
		2				1								FALSE	FALSE	username
database id		nb classes				first class info oid								odb last close status	databse without user,pw	no-user
61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90
username
91	92	93	94	95	96	97	98	99	100	101	102	103	104	105	106	107	108	109	110	111	112	113	114	115	116	117	118	119	120
						password
121	122	123	124	125	126	127	128	129	130	131	132	133	134	135	136	137	138	139	140	141	142	143	144	145	146	147	148	149	150
password																										155
151	152	153	154	155	156	157	158	159	160	161	162	163	164	165	166	167	168	169	170	171	172	173	174	175	176	177	178	179	180
				18034				20	1	-1								-1								1
current id bolck position				block size						prev block pos								next block pos								id block number
181	182	183	184	185	186	187	188	189	190								198	199	200	201	202	203	204	205	206	207	208	209	210
5								2 (代表CLASS)	1								1 ACTIVE	18189								2 (代表CLASS)	1
id block max id update								id type	oid								id status	class position of id								id type	oid
211	212	213	214	215	216	217	218	219	220	221	222	223	224	225	226	227	228	229	230	231	232	233	234	235	236	237	238	239	240
					1	18309								1 (代表OBJECT)	3								1	18589
241	242	243	244	245	246	247	248	249	250	251	252	253	254	255	256	257	258	259	260	261	262	263	264	265	266	267	268	269	270
		1 (代表OBJECT)	4								1	18765
Player类
18189				18193	18194	18195								18203								18211
120				1	2	1								-1								2
block size				class header block type	Class info category	class id								prev class oid								next class oid
18219									18227								18235								18243
0									-1								-1								P	l	a	y	e
class nb objects									class first obj pos								class last obj pos								值(2×字符数+8)
18248															18263												18275
r															m	a	r	s	.	o	d	b	.	p	o	j	o
															值(2×字符数+8)
18297				18301								18309
3				18466
Max attribute id				class att def pos
Sport类
18309				18313	18314	18315								18323								18331
118				1	2	2								1								-1
block size				class header block type	Class info category	class id								prev class oid								next class oid
18339									18347								18355								18363
0									-1								-1								S	p	o	r	t
class nb objects									class first obj pos								class last obj pos								值(2×字符数+8)
													18381
													m	a	r	s	.	o	d	b	.	p	o	j	o
													值(2×字符数+8)
18415				18419								18427
1				18427
Max attribute id				class att def pos
Sport属性
18427				18431	18432								18440				18445				18449
39				2	`								1				210(java.lang.String)				n	a	m	e
block size				BLOCK_ TYPE_ CLASS_ BODY	class nb attributes								attribute id				att odb type id
Player属性
18466				18470	18471								18479				18484				18488
123				2	3								1				210(java.lang.String)				n	a	m	e
block size				BLOCK_ TYPE_ CLASS_ BODY	class nb attributes								attribute id				att odb type id				值(2×字符数+8)
								18505					18510				18514
								2					170(java.util.Date)				b	i	r	t	h	D	a	t	e
								attribute id					att odb type id				值(2×字符数+8)
														18541				18546								18554
														3				2								favoriteSport
														attribute id				class info id								值(2×字符数+8)
Player对象
18589				18593		18594								18602								18610
288				4 BLOCK_ TYPE_ NON_ NATIVE_ OBJECT		3								1								-1
block size				object block type		oid								class info id [对象id]								prev instance
18618								18626								18634								18642				18646
-1								[1211898399406]								[1211898399859]								1
next instance								creation date								update date								object version number
						18654	18655				18659				18663								18671
-1						FALSE	3				1				18695								2
object reference pointer						is syncronized with external db	nb attr [属性数量]				attr id				att pos								attr id
18675								18683				18687									18695				18699	18700
18747								3				-4									9				3 BLOCK_ TYPE_ NATIVE_ OBJECT	210
att pos								attr id				att pos									native block header block size				native block type	native block odb type id
18705				……	18747				18751	18752				18757
蒂埃里·亨利					9				3 BLOCK_ TYPE_ NATIVE_ OBJECT	170				[222278880000]
值(2×字符数+8)					native block header block size				native block type	native block odb type id				值
Sport对象
18765				18769
112				4
block size				object block type
18770								18778								18786								18794
4								2								-1								-1
oid								class info id								prev instance								next instance
		18802								18810								18818				18822
		[1211898576968]								[1211898577203]								1				-1
		creation date								update date								object version number				object reference pointer
18830	18831				18835				18839								18847				18851	18852				18857			18617
FALSE	1				1				18847								9				3 BLOCK_ TYPE_ NATIVE_ OBJECT	210				足球
is syncronized external db	nb attr				attr id				att pos/att real pos								native block header block size				native block type	native block odb type id				值(2×字符数+8)