|
| 1 | +(ns core.fdb) |
| 2 | + |
| 3 | +(defrecord Entity [e_id name attrs]) |
| 4 | +(defrecord Attr [name type value ts prev-ts]) |
| 5 | + |
| 6 | + |
| 7 | +(defn make-entity [name] (Entity. (keyword name) name {})) |
| 8 | +(defn make-attr[name val type] (Attr. name type val -1 -1)) |
| 9 | +(defn add-attr[ ent attr] (assoc-in ent [:attrs (keyword (:name attr))] attr)) |
| 10 | + |
| 11 | +;(defn update-creation-ts [ent ts] |
| 12 | +; (let ks [k]) |
| 13 | +; |
| 14 | +; |
| 15 | +; ) |
| 16 | + |
| 17 | +(defn add-entity[db ent] (let [ |
| 18 | + ts-mp (last (:timestamped db)) |
| 19 | + new-eavt (assoc (:EAVT ts-mp) (:e_id ent) ent) |
| 20 | + new-avet (:AVET ts-mp) |
| 21 | + new-ts (assoc ts-mp :AVET new-avet :EAVT new-eavt )] |
| 22 | + (assoc db :timestamped (conj (:timestamped db) new-ts)) |
| 23 | + )) |
| 24 | + |
| 25 | +(defn make-db[] |
| 26 | + (atom {:timestamped [{:EAVT {} :AVET {}}] |
| 27 | + :topId 0 |
| 28 | + :curr-time 0 |
| 29 | + } |
| 30 | + ) |
| 31 | + ) |
| 32 | + |
| 33 | + |
| 34 | + |
| 35 | +(def db1 (make-db)) |
| 36 | + |
| 37 | + |
| 38 | +(def en (make-entity "hotel")) |
| 39 | + |
| 40 | +(add-attr en (make-attr "room" 12 :number)) |
| 41 | + |
| 42 | +(swap! db1 add-entity en) |
| 43 | + |
| 44 | + |
| 45 | + |
| 46 | + |
| 47 | + |
| 48 | + |
| 49 | + |
| 50 | +(defn recent-ts-val [db](last (:timestamped db))) |
| 51 | + |
| 52 | + |
| 53 | +;(defn update-ts-with-EAV [ts &[e a v] :as more] |
| 54 | +; (let[eavt (:EAVT ts)] |
| 55 | +; (assoc-in ts :EAVT e a v) |
| 56 | +; ) |
| 57 | +; ) |
| 58 | + |
| 59 | +;(defn _add-timestamp[db & more] |
| 60 | +; (let [ ts {:EAVT (:EAVT (recent-ts-val db))}] |
| 61 | +; (update-ts-with-EAV ts more) |
| 62 | +; |
| 63 | +; (assoc db :timestamped (conj (:timestamped db) ts)) |
| 64 | +; ) |
| 65 | +; ) |
| 66 | + |
| 67 | + |
| 68 | + |
| 69 | +@db1 |
| 70 | + |
| 71 | +;(swap! db1 _add-timestamp) |
| 72 | + |
| 73 | +;@db1 |
| 74 | + |
| 75 | + |
| 76 | + |
| 77 | + |
| 78 | +(defn next-id [db] (let [curr (@db :curr-time)] |
| 79 | + (swap! db assoc :curr-time (inc curr)) |
| 80 | + curr)) |
| 81 | + |
| 82 | + |
| 83 | +(defn make-entity[db name] (Entity. (db :curr-time) name)) |
| 84 | + |
| 85 | +(defn add-entity [db ent] |
| 86 | + (let [ |
| 87 | + timestamped-vec (:timestamped db) |
| 88 | + eavt-map (:EAVT (recent-ts-val db)) |
| 89 | + ] |
| 90 | + (assoc db :timestamped (conj timestamped-vec {:EAVT |
| 91 | + (assoc eavt-map (keyword (:name ent)) ent)} ) ) |
| 92 | + ) |
| 93 | + ) |
| 94 | + |
| 95 | + |
| 96 | + @db1 |
| 97 | + (add-entity @db1 |
| 98 | + (make-entity @db1 "person") |
| 99 | + ) |
| 100 | + ;(add-attr @db1 "name" :string "Jim" ) |
| 101 | + ; (add-attr @db1 "sur-name" :string "Doe" ) |
| 102 | + ; (add-attr @db1 "age-name" :number 39 ) |
| 103 | + |
| 104 | + |
| 105 | + |
| 106 | + |
| 107 | + |
| 108 | + |
| 109 | + |
| 110 | + |
| 111 | +(next-id db1) |
| 112 | +(next-id db1) |
| 113 | +;db |
| 114 | +(defn fact[n] |
| 115 | + (if (<= n 0) 1 |
| 116 | + (* n (fact (dec n))) |
| 117 | + ) |
| 118 | + |
| 119 | + ) |
| 120 | + |
| 121 | +(fact 1) |
| 122 | + |
| 123 | +;(swap! db assoc :6 5 |
0 commit comments