factor/extra/semantic-db/semantic-db.factor

286 lines
9.0 KiB
Factor
Executable File

! Copyright (C) 2008 Alex Chapman
! See http://factorcode.org/license.txt for BSD license.
USING: accessors arrays combinators combinators.cleave combinators.lib
continuations db db.tuples db.types db.sqlite kernel math
math.parser namespaces parser lexer sets sequences sequences.deep
sequences.lib strings words destructors ;
IN: semantic-db
TUPLE: node id content ;
C: <node> node
node "node"
{
{ "id" "id" +db-assigned-id+ +autoincrement+ }
{ "content" "content" TEXT }
} define-persistent
: delete-node ( node -- ) delete-tuples ;
: create-node ( content -- node ) f swap <node> dup insert-tuple ;
: load-node ( id -- node ) f <node> select-tuple ;
: node-content ( node -- content )
dup content>> [ nip ] [ select-tuple content>> ] if* ;
: node= ( node node -- ? ) [ id>> ] bi@ = ;
! TODO: get rid of arc id and write our own sql
TUPLE: arc id subject object relation ;
: <arc> ( subject object relation -- arc )
arc new swap >>relation swap >>object swap >>subject ;
: <id-arc> ( id -- arc )
arc new swap >>id ;
: delete-arc ( arc -- ) delete-tuples ;
: create-arc ( subject object relation -- )
[ id>> ] tri@ <arc> insert-tuple ;
: nodes>arc ( subject object relation -- arc )
[ [ id>> ] [ f ] if* ] tri@ <arc> ;
: select-arcs ( subject object relation -- arcs )
nodes>arc select-tuples ;
: has-arc? ( subject object relation -- ? )
select-arcs length 0 > ;
: select-arc-subjects ( subject object relation -- subjects )
select-arcs [ subject>> f <node> ] map ;
: select-arc-subject ( subject object relation -- subject )
select-arcs ?first [ subject>> f <node> ] [ f ] if* ;
: select-subjects ( object relation -- subjects )
f -rot select-arc-subjects ;
: select-subject ( object relation -- subject )
f -rot select-arc-subject ;
: select-arc-objects ( subject object relation -- objects )
select-arcs [ object>> f <node> ] map ;
: select-arc-object ( subject object relation -- object )
select-arcs ?first [ object>> f <node> ] [ f ] if* ;
: select-objects ( subject relation -- objects )
f swap select-arc-objects ;
: select-object ( subject relation -- object )
f swap select-arc-object ;
: delete-arcs ( subject object relation -- )
select-arcs [ delete-arc ] each ;
arc "arc"
{
{ "id" "id" +db-assigned-id+ +autoincrement+ }
{ "relation" "relation" INTEGER +not-null+ }
{ "subject" "subject" INTEGER +not-null+ }
{ "object" "object" INTEGER +not-null+ }
} define-persistent
: create-bootstrap-nodes ( -- )
"semantic-db" create-node drop
"has-context" create-node drop ;
: semantic-db-context T{ node f 1 "semantic-db" } ;
: has-context-relation T{ node f 2 "has-context" } ;
: create-bootstrap-arcs ( -- )
has-context-relation semantic-db-context has-context-relation create-arc ;
: init-semantic-db ( -- )
node create-table arc create-table
create-bootstrap-nodes create-bootstrap-arcs ;
! db utilities
: results ( bindings sql -- array )
f f <simple-statement> [ do-bound-query ] with-disposal ;
: node-result ( result -- node )
dup first string>number swap second <node> ;
: ?1node-result ( results -- node )
?first [ node-result ] [ f ] if* ;
: node-results ( results -- nodes )
[ node-result ] map ;
: param ( value key type -- param )
swapd <sqlite-low-level-binding> ;
: all-node-ids ( -- seq )
f "select n.id from node n" results [ first string>number ] map ;
: subjects-with-cor ( content object relation -- sql-results )
[ id>> ] bi@
[
":relation" INTEGER param ,
":object" INTEGER param ,
":content" TEXT param ,
] { } make
"select n.id, n.content from node n, arc a where n.content = :content and n.id = a.subject and a.relation = :relation and a.object = :object" results ;
: objects-with-csr ( content subject relation -- sql-results )
[ id>> ] bi@
[
":relation" INTEGER param ,
":subject" INTEGER param ,
":content" TEXT param ,
] { } make
"select n.id, n.content from node n, arc a where n.content = :content and n.id = a.object and a.relation = :relation and a.subject = :subject" results ;
: (with-relation) ( content relation -- bindings sql )
id>> [ ":relation" INTEGER param , ":content" TEXT param , ] { } make
"select distinct n.id, n.content from node n, arc a where n.content = :content and a.relation = :relation" ;
: subjects-with-relation ( content relation -- sql-results )
(with-relation) " and a.object = n.id" append results ;
: objects-with-relation ( content relation -- sql-results )
(with-relation) " and a.subject = n.id" append results ;
: (ultimate) ( relation b a -- sql-results )
[
"select distinct n.id, n.content from node n, arc a where a.relation = :relation and n.id = a." % % " and n.id not in (select b." % % " from arc b where b.relation = :relation)" %
] "" make [ id>> ":relation" INTEGER param 1array ] dip results ;
: ultimate-objects ( relation -- sql-results )
"subject" "object" (ultimate) ;
: ultimate-subjects ( relation -- sql-results )
"object" "subject" (ultimate) ;
! contexts:
! - a node n is a context iff there exists a relation r such that r has context n
: create-context ( context-name -- context ) create-node ;
: get-context ( context-name -- context/f )
has-context-relation subjects-with-relation ?1node-result ;
: ensure-context ( context-name -- context )
dup get-context [
nip
] [
create-context
] if* ;
! relations:
! - have a context in context 'semantic-db'
: create-relation ( relation-name context -- relation )
[ create-node dup ] dip has-context-relation create-arc ;
: get-relation ( relation-name context -- relation/f )
has-context-relation subjects-with-cor ?1node-result ;
: ensure-relation ( relation-name context -- relation )
2dup get-relation [
2nip
] [
create-relation
] if* ;
TUPLE: relation-definition relate id-word unrelate related? subjects objects ;
C: <relation-definition> relation-definition
<PRIVATE
: default-word-name ( relate-word-name word-type -- name>> )
{
{ "relate" [ ] }
{ "id-word" [ "-relation" append ] }
{ "unrelate" [ "!" swap append ] }
{ "related?" [ "?" append ] }
{ "subjects" [ "-subjects" append ] }
{ "objects" [ "-objects" append ] }
} case ;
: choose-word-name ( relation-definition given-word-name word-type -- name>> )
over string? [
drop nip
] [
nip [ relate>> ] dip default-word-name
] if ;
: (define-relation-word) ( id-word name>> definition -- id-word )
>r create-in over [ execute ] curry r> compose define ;
: define-relation-word ( relation-definition id-word given-word-name word-type definition -- relation-definition id-word )
>r >r [
pick swap r> choose-word-name r> (define-relation-word)
] [
r> r> 2drop
] if* ;
: define-relation-words ( relation-definition id-word -- )
over relate>> "relate" [ create-arc ] define-relation-word
over unrelate>> "unrelate" [ delete-arcs ] define-relation-word
over related?>> "related?" [ has-arc? ] define-relation-word
over subjects>> "subjects" [ select-subjects ] define-relation-word
over objects>> "objects" [ select-objects ] define-relation-word
2drop ;
: define-id-word ( relation-definition id-word -- )
[ relate>> ] dip tuck vocabulary>>
[ ensure-context ensure-relation ] 2curry define ;
: create-id-word ( relation-definition -- id-word )
dup id-word>> "id-word" choose-word-name create-in ;
PRIVATE>
: define-relation ( relation-definition -- )
dup create-id-word 2dup define-id-word define-relation-words ;
: RELATION:
scan t t t t t <relation-definition> define-relation ; parsing
! hierarchy
TUPLE: node-tree node children ;
C: <node-tree> node-tree
: children ( node has-parent-relation -- children ) select-subjects ;
: parents ( node has-parent-relation -- parents ) select-objects ;
: get-node-tree ( node child-selector -- node-tree )
2dup call >r [ get-node-tree ] curry r> swap map <node-tree> ;
! : get-node-tree ( node has-parent-relation -- node-tree )
! 2dup children >r [ get-node-tree ] curry r> swap map <node-tree> ;
: get-node-tree-s ( node has-parent-relation -- tree )
[ select-subjects ] curry get-node-tree ;
: get-node-tree-o ( node has-child-relation -- tree )
[ select-objects ] curry get-node-tree ;
: (get-node-chain) ( node next-selector seq -- seq )
pick [
over push >r [ call ] keep r> (get-node-chain)
] [
2nip
] if* ;
: get-node-chain ( node next-selector -- seq )
V{ } clone (get-node-chain) ;
: get-node-chain-o ( node relation -- seq )
[ select-object ] curry get-node-chain ;
: get-node-chain-s ( node relation -- seq )
[ select-subject ] curry get-node-chain ;
: (get-root-nodes) ( node has-parent-relation -- root-nodes/node )
2dup parents dup empty? [
2drop
] [
>r nip [ (get-root-nodes) ] curry r> swap map
] if ;
: get-root-nodes ( node has-parent-relation -- root-nodes )
(get-root-nodes) flatten prune ;