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
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
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
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
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
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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
;;; "dbcom.scm" embed commands in relational-database
; Copyright 1994, 1995, 1997, 2000, 2001 Aubrey Jaffer
;
;Permission to copy this software, to modify it, to redistribute it,
;to distribute modified versions, and to use it for any purpose is
;granted, subject to the following restrictions and understandings.
;
;1. Any copy made of this software must include this copyright notice
;in full.
;
;2. I have made no warranty or representation that the operation of
;this software will be error-free, and I am under no obligation to
;provide any services, by way of maintenance, update, or otherwise.
;
;3. In conjunction with products arising from the use of this
;material, there shall be no use of my name in any advertising,
;promotional, or sales literature without prior written consent in
;each case.
(require 'common-list-functions) ;for position
(require 'relational-database)
(require 'databases)
;@
(define (wrap-command-interface rdb)
(let* ((rdms:commands ((rdb 'open-table) '*commands* #f))
(command:get (and rdms:commands (rdms:commands 'get 'procedure))))
(and command:get
(letrec ((wdb (lambda (command)
(let ((com (command:get command)))
(if com ((slib:eval com) wdb) (rdb command))))))
(let ((init (wdb '*initialize*)))
(if (procedure? init) init wdb))))))
;@
(define (open-command-database! path . arg)
(define bt (apply open-database! path arg))
(and bt (wrap-command-interface bt)))
;@
(define (open-command-database path . arg)
(define bt (apply open-database path arg))
(and bt (wrap-command-interface bt)))
;@
(define (add-command-tables rdb)
(define-tables
rdb
'(type
((name symbol))
()
((atom)
(symbol)
(string)
(number)
(money)
(date-time)
(boolean)
(foreign-key)
(expression)
(virtual)))
'(parameter-arity
((name symbol))
((predicate? expression)
(procedure expression))
((single (lambda (a) (and (pair? a) (null? (cdr a)))) car)
(optional
(lambda (lambda (a) (or (null? a) (and (pair? a) (null? (cdr a))))))
identity)
(boolean
(lambda (a) (or (null? a)
(and (pair? a) (null? (cdr a)) (boolean? (car a)))))
(lambda (a) (if (null? a) #f (car a))))
(nary (lambda (a) #t) identity)
(nary1 (lambda (a) (not (null? a))) identity))))
(for-each (((rdb 'open-table) '*domains-data* #t) 'row:insert)
'((parameter-list *catalog-data* #f symbol 1)
(parameter-name-translation *catalog-data* #f symbol 1)
(parameter-arity parameter-arity #f symbol 1)
(table *catalog-data* #f atom 1)))
(define-tables
rdb
'(*parameter-columns*
*columns*
*columns*
((1 #t index #f ordinal)
(2 #f name #f symbol)
(3 #f arity #f parameter-arity)
(4 #f domain #f domain)
(5 #f defaulter #f expression)
(6 #f expander #f expression)
(7 #f documentation #f string)))
'(no-parameters
*parameter-columns*
*parameter-columns*
())
'(no-parameter-names
((name string))
((parameter-index ordinal))
())
'(add-domain-params
*parameter-columns*
*parameter-columns*
((1 domain-name single atom #f #f "new domain name")
(2 foreign-table optional table #f #f
"if present, domain-name must be existing key into this table")
(3 domain-integrity-rule optional expression #f #f
"returns #t if single argument is good")
(4 type-id single type #f #f "base type of new domain")
(5 type-param optional expression #f #f
"which (key) field of the foreign-table")
))
'(add-domain-pnames
((name string))
((parameter-index ordinal)) ;should be add-domain-params
(
("n" 1) ("name" 1)
("f" 2) ("foreign (key) table" 2)
("r" 3) ("domain integrity rule" 3)
("t" 4) ("type" 4)
("p" 5) ("type param" 5)
))
'(del-domain-params
*parameter-columns*
*parameter-columns*
((1 domain-name single domain #f #f "domain name")))
'(del-domain-pnames
((name string))
((parameter-index ordinal)) ;should be del-domain-params
(("n" 1) ("name" 1)))
'(*commands*
((name symbol))
((parameters parameter-list)
(parameter-names parameter-name-translation)
(procedure expression)
(documentation string))
((domain-checker
no-parameters
no-parameter-names
dbcom:check-domain
"return procedure to check given domain name")
(add-domain
add-domain-params
add-domain-pnames
(lambda (rdb)
(((rdb 'open-table) '*domains-data* #t) 'row:update))
"add a new domain")
(delete-domain
del-domain-params
del-domain-pnames
(lambda (rdb)
(((rdb 'open-table) '*domains-data* #t) 'row:remove))
"delete a domain"))))
(let* ((tab ((rdb 'open-table) '*domains-data* #t))
(row ((tab 'row:retrieve) 'type)))
((tab 'row:update) (cons 'type (cdr row))))
(wrap-command-interface rdb))
;@
(define (define-*commands* rdb . cmd-defs)
(define defcmd (((rdb 'open-table) '*commands* #t) 'row:update))
(for-each (lambda (def)
(define procname (caar def))
(define args (cdar def))
(define body (cdr def))
(let ((comment (and (string? (car body)) (car body))))
(define nbody (if comment (cdr body) body))
(defcmd (list procname
'no-parameters
'no-parameter-names
`(lambda ,args ,@nbody)
(or comment "")))))
cmd-defs))
;; Actually put into command table by add-command-tables
(define (dbcom:check-domain rdb)
(let* ((ro:domains ((rdb 'open-table) '*domains-data* #f))
(ro:get-dir (ro:domains 'get 'domain-integrity-rule))
(ro:for-tab (ro:domains 'get 'foreign-table)))
(lambda (domain)
(let ((fkname (ro:for-tab domain))
(dir (slib:eval (ro:get-dir domain))))
(if fkname (let* ((fktab ((rdb 'open-table) fkname #f))
(p? (fktab 'get 1)))
(if dir (lambda (e) (and (dir e) (p? e))) p?))
dir)))))
;@
(define (make-command-server rdb command-table)
(let* ((comtab ((rdb 'open-table) command-table #f))
(names (comtab 'column-names))
(row-ref (lambda (row name) (list-ref row (position name names))))
(comgetrow (comtab 'row:retrieve)))
(lambda (comname command-callback)
(cond ((not comname) (set! comname '*default*)))
(cond ((not (comgetrow comname))
(slib:error 'command 'not 'known: comname)))
(let* ((command:row (comgetrow comname))
(parameter-table
((rdb 'open-table) (row-ref command:row 'parameters) #f))
(parameter-names
((rdb 'open-table) (row-ref command:row 'parameter-names) #f))
(comval ((slib:eval (row-ref command:row 'procedure)) rdb))
(options ((parameter-table 'get* 'name)))
(positions ((parameter-table 'get* 'index)))
(arities ((parameter-table 'get* 'arity)))
(defaulters (map slib:eval ((parameter-table 'get* 'defaulter))))
(domains ((parameter-table 'get* 'domain)))
(types (map (((rdb 'open-table) '*domains-data* #f) 'get 'type-id)
domains))
(dirs (map (or (rdb 'domain-checker) (lambda (domain)
(lambda (domain) #t)))
domains))
(aliases
(map list ((parameter-names 'get* 'name))
(map (parameter-table 'get 'name)
((parameter-names 'get* 'parameter-index))))))
(command-callback comname comval options positions
arities types defaulters dirs aliases)))))
|
