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<pre> <span class="ruby-comment cmt"># File lib/activerdf_rdflite/rdflite.rb, line 34</span>
34: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">params</span> = {})
35: <span class="ruby-identifier">$activerdflog</span>.<span class="ruby-identifier">info</span> <span class="ruby-node">"initialised rdflite with params #{params.to_s}"</span>
36:
37: <span class="ruby-ivar">@reads</span> = <span class="ruby-keyword kw">true</span>
38: <span class="ruby-ivar">@writes</span> = <span class="ruby-keyword kw">true</span>
39:
40: <span class="ruby-comment cmt"># if no file-location given, we use in-memory store</span>
41: <span class="ruby-identifier">file</span> = <span class="ruby-identifier">params</span>[<span class="ruby-identifier">:location</span>] <span class="ruby-operator">||</span> <span class="ruby-value str">':memory:'</span>
42: <span class="ruby-ivar">@db</span> = <span class="ruby-constant">SQLite3</span><span class="ruby-operator">::</span><span class="ruby-constant">Database</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">file</span>)
43:
44: <span class="ruby-comment cmt"># disable keyword search by default, enable only if ferret is found</span>
45: <span class="ruby-ivar">@keyword_search</span> = <span class="ruby-identifier">params</span>[<span class="ruby-identifier">:keyword</span>].<span class="ruby-identifier">nil?</span> <span class="ruby-value">? </span><span class="ruby-keyword kw">false</span> <span class="ruby-operator">:</span> <span class="ruby-identifier">params</span>[<span class="ruby-identifier">:keyword</span>]
46: <span class="ruby-ivar">@keyword_search</span> <span class="ruby-operator">&=</span> <span class="ruby-ivar">@@have_ferret</span>
47:
48: <span class="ruby-ivar">@reasoning</span> = <span class="ruby-identifier">params</span>[<span class="ruby-identifier">:reasoning</span>] <span class="ruby-operator">||</span> <span class="ruby-keyword kw">false</span>
49:
50: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">keyword_search?</span>
51: <span class="ruby-comment cmt"># we initialise the ferret index, either as a file or in memory</span>
52: <span class="ruby-identifier">infos</span> = <span class="ruby-constant">Ferret</span><span class="ruby-operator">::</span><span class="ruby-constant">Index</span><span class="ruby-operator">::</span><span class="ruby-constant">FieldInfos</span>.<span class="ruby-identifier">new</span>
53:
54: <span class="ruby-comment cmt"># we setup the fields not to store object's contents</span>
55: <span class="ruby-identifier">infos</span>.<span class="ruby-identifier">add_field</span>(<span class="ruby-identifier">:subject</span>, <span class="ruby-identifier">:store</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">:yes</span>, <span class="ruby-identifier">:index</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">:no</span>, <span class="ruby-identifier">:term_vector</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">:no</span>)
56: <span class="ruby-identifier">infos</span>.<span class="ruby-identifier">add_field</span>(<span class="ruby-identifier">:object</span>, <span class="ruby-identifier">:store</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">:no</span>) <span class="ruby-comment cmt">#, :index => :omit_norms)</span>
57:
58: <span class="ruby-ivar">@ferret</span> = <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">params</span>[<span class="ruby-identifier">:location</span>]
59: <span class="ruby-constant">Ferret</span><span class="ruby-operator">::</span><span class="ruby-constant">I</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">:path</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">params</span>[<span class="ruby-identifier">:location</span>] <span class="ruby-operator">+</span> <span class="ruby-value str">'.ferret'</span>, <span class="ruby-identifier">:field_infos</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">infos</span>)
60: <span class="ruby-keyword kw">else</span>
61: <span class="ruby-constant">Ferret</span><span class="ruby-operator">::</span><span class="ruby-constant">I</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">:field_infos</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">infos</span>)
62: <span class="ruby-keyword kw">end</span>
63: <span class="ruby-keyword kw">end</span>
64:
65: <span class="ruby-comment cmt"># turn off filesystem synchronisation for speed</span>
66: <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">synchronous</span> = <span class="ruby-value str">'off'</span>
67:
68: <span class="ruby-comment cmt"># create triples table. ignores duplicated triples</span>
69: <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">execute</span>(<span class="ruby-value str">'create table if not exists triple(s,p,o,c, unique(s,p,o,c) on conflict ignore)'</span>)
70:
71: <span class="ruby-identifier">create_indices</span>(<span class="ruby-identifier">params</span>)
72: <span class="ruby-ivar">@db</span>
73: <span class="ruby-keyword kw">end</span></pre>
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