Converted the dbpedia example to a generic lib

README.md

@@ -6,7 +6,7 @@ Description
 ---------------------
 This module is part of the Web4.0 project.
 
-So far, it performs basic queries to dbpedia, but the same code could be use to query any other sparql endpoint.
+You can use it to query any sparql endpoint. So far, dbpedia and sindice.com have been tested.
 
 Dependencies
 --------------------

index.js

@@ -0,0 +1,2 @@
+require('coffee-script')
+require('./lib/hook.io-sparql')

lib/hook.io-sparql.coffee

@@ -0,0 +1,39 @@
+# Imports
+sparql = require 'sparql'
+Hook = require('hook.io').Hook
+
+examplequery = "
+        SELECT DISTINCT ?label ?abstract ?population
+        WHERE { ?place rdf:type dbpedia-owl:PopulatedPlace.
+                ?place foaf:name ?label.
+                ?place dbpprop:population ?population.
+                OPTIONAL{
+                    ?place dbpedia-owl:abstract ?abstract.
+                    FILTER langMatches( lang(?abstract), 'en')
+                }
+        } LIMIT 10"
+        
+
+class SPARQLHook extends Hook
+    constructor: (options) ->
+        self = this
+        Hook.call(self, options)
+        @client = new sparql.Client options.url
+
+        self.on 'hook::ready', ->
+            self.on '*::query', (data,fn) ->
+                @queryDBPedia data , (res) ->
+                    console.log res
+                    fn res
+        console.log "Created"
+
+
+    query: (query, cb) ->
+        console.log ">>Going to query"
+        @client.rows  query, (err, res) ->
+                cb res
+
+    addPreffix: (key,url) ->
+        @client.prefix_map[key] = url
+
+exports.SPARQLHook = SPARQLHook