Revision as of 18:36, 13 February 2018

{{Article|title=SimpleGraph|text=SimpleGraph is an open source project that allows to wrap Systems APIs in a way that graph algorithms and storage can be applied. As an implementation Apache Gremlin/Tinkerpop is used.

@@ Line 4: / Line 4: @@
 = Modules =
 # {{Link|target=SimpleGraph-FileSystem}}
+# {{Link|target=SimpleGraph-MapSystem}}
-= MapSystem example =
-The MapSystem is a simple wrapper for a graph with nodes that have key/value pairs. We would not really need this since Apache Tinkerpop/Gremlin already supplies us with properties per node/vertex.
-Still this system is useful as a helper system and to illustrate the wrapping concepts and possibilities of SimpleGraph
-== Unit Test ==
-<source lang='java'>
-  @Test
-  public void testMapSystem() throws Exception {
-    // create a map system and connect to init
-    MapSystem ms=new MapSystem();
-    ms.connect();
-    // init some maps of carbrands and cars each map shall later represent a
-    // vertex in the graph with it's properties
-    Map[] carbrandmaps= {
-        initMap("name","Ferrari","country","Italy","wikidataid","Q27586"),
-        initMap("name","Porsche","country","Germany","wikidataid","Q40993"),
-        initMap("name","Ford","cuntry","United States","wikidataid","Q44294")
-    };
-    Map[] carmakemaps= {
-        initMap("name","308","year",1984,"wikidataid","Q1407659","brand","Ferrari"),
-        initMap("name","328","year",1989,"wikidataid","Q1407669","brand","Ferrari"),
-        initMap("name","901","year",1964,"wikidataid","Q2104537","brand","Porsche"),
-        initMap("name","2017 GT","year",2017,"wikidataid","Q23856323","brand","Ford")
-    };
-    // create MapNodes with the given kind "carbrand" or "car" based on the maps
-    MapNode startNode=null;
-    for (Map map:carbrandmaps) {
-      startNode=new MapNode(ms,"carbrand",map);
-    }
-    for (Map map:carmakemaps) {
-      MapNode mapNode=new MapNode(ms,"car",map);
-      // link the node of this car to it's carbrand node using the Gremlin graph traversal
-      // language - this is the key action for this example
-      ms.g().V().hasLabel("carbrand").has("name",map.get("brand")).forEachRemaining(brandNode->{
-        brandNode.addEdge("brand", mapNode.getVertex());
-      });
-    }
-    // set a start node for the system
-    // any node will do and for this example it is not really necessary - each node
-    // has the full graph accesible
-    ms.setStartNode(startNode);
-    // uncomment if you'd like to see all the node details
-    // debug=true;
-    if (debug)
-      ms.g().V().forEachRemaining(SimpleNode.printDebug);
-    // generate a graphviz graph based on this start node
-    // show the "brand" edges
-    // show the "name" for each node
-    // use wikidataid as the identifier
-    // and extend to a full url using the WIKIDATA_URL_PREFIX
-    // use the rankDir RL = right left
-    // and name the graph "CarGraph"
-    String graphViz = TestRythm.generateGraphViz(ms.getStartNode(), "brand", "name", "wikidataid",
-        WIKIDATA_URL_PREFIX,"RL","CarGraph");
-    // uncomment if you'd like to see the graph source code
-    // the rendered graph is available at http://www.bitplan.com/index.php?title=SimpleGraph#CarGraph
-    // debug = true;
-    if (debug)
-      System.out.println(graphViz.trim());
-    // check that the graph contains one of the expected graphviz code lines
-    assertTrue(graphViz.contains("\"Q27586\" [ label=\"Ferrari\" URL=\"https://www.wikidata.org/wiki/Q27586\"]"));
-  }
-</source>
-== CarGraph ==
-The nodes of this graph are clickable and will lead you to the wikidata pages of the cars and carbrands.
-<!--
-  this graph was generated 2018-01-26 17:00:02
-  by the graphvizTree.rythm template
-  see http://wiki.bitplan.com/index.php/SimpleGraph
--->
-<graphviz>
-  digraph CarGraph {
-    rankdir="RL";
-    "Q27586" [ label="Ferrari" URL="https://www.wikidata.org/wiki/Q27586"]
-    "Q23856323" [ label="2017 GT" URL="https://www.wikidata.org/wiki/Q23856323"]
-    "Q40993" [ label="Porsche" URL="https://www.wikidata.org/wiki/Q40993"]
-    "Q1407669" [ label="328" URL="https://www.wikidata.org/wiki/Q1407669"]
-    "Q44294" [ label="Ford" URL="https://www.wikidata.org/wiki/Q44294"]
-    "Q2104537" [ label="901" URL="https://www.wikidata.org/wiki/Q2104537"]
-    "Q1407659" [ label="308" URL="https://www.wikidata.org/wiki/Q1407659"]
-    "Q40993" -> "Q2104537" [ label="brand"]
-    "Q27586" -> "Q1407659" [ label="brand"]
-    "Q44294" -> "Q23856323" [ label="brand"]
-    "Q27586" -> "Q1407669" [ label="brand"]
-  }
-</graphviz>
-}}
-[[Category:frontend]]
-[[Category:SiGNaL]]
-[[Category:SimpleGraph]]

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Revision as of 18:36, 13 February 2018

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