Changeset 8347

Timestamp:

2004-10-18T09:39:56+13:00 (20 years ago)

Author:

kjdon

Message:

first stab at generating the results the java way. seems to work sporadically

File:

• trunk/gsdl3/src/java/org/greenstone/gsdl3/service/Visualizer.java (modified) (6 diffs)

trunk/gsdl3/src/java/org/greenstone/gsdl3/service/Visualizer.java

@@ -32 +32 @@
 import vishnu.server.Search.*;
 import vishnu.datablock.*;
+import vishnu.util.Base64;
 
 public class Visualizer
@@ -70 +71 @@
     app_info += "<PARAM NAME='collection'   VALUE='" + this.cluster_name + "'/>";
     app_info += "<PARAM NAME='engine'   VALUE='GSDLEngine' />";
+    // add view info if appropriate
     app_info += "The visualization applet.</"+GSXML.APPLET_ELEM+">";
        
@@ -134 +136 @@
     if (type.equals("search")) {
 
-        Element cluster_results = this.doc.createElement("cluster");
-        vis_data.appendChild(cluster_results);
-        Element description_results = this.doc.createElement("descriptions");
-        vis_data.appendChild(description_results);
+        //Element cluster_results = this.doc.createElement("cluster");
+        //vis_data.appendChild(cluster_results);
+        //Element description_results = this.doc.createElement("descriptions");
+        //vis_data.appendChild(description_results);
 
         String query = (String)params.get("q");
@@ -149 +151 @@
         descriptions = engine.getDocDescriptions();
         
+        DataBlock db = generateDataBlock(collection_home, null, doc_nums, descriptions);
+        System.err.println("got back data, now converting to string");
+        try {
+        results = Base64.encodeObject(db);
+        } catch (Exception e) {
+        System.err.println("trying to base64 encode the datablock, but exception happened: "+e);
+        }
+        System.err.println("after converting to string");
+//      // serialise the data block
+//      try {
+//      ByteArrayOutputStream baos = new ByteArrayOutputStream();
+//      ObjectOutputStream oos = new ObjectOutputStream(baos);
+//      oos.writeObject(db);
+//      oos.close();
+        
+//      //results = baos.toString("UTF-8");
+//      results = Base64.encode(baos.toByteArray());
+//      } catch (Exception e) {
+//      System.err.println("Visualizer serialise data block error: "+e);
+//      }
         //System.err.println("num docs = "+doc_nums.size());
         //Cluster c = new Cluster();
@@ -156 +178 @@
 
         Text t = this.doc.createTextNode(results);
-        cluster_results.appendChild(t);
-
-        for (int i=0; i<descriptions.size(); i++) {
-        String d = (String)descriptions.get(i);
-        Element de = GSXML.createTextElement(this.doc, "desc", d);
-        description_results.appendChild(de);
-        }
+        vis_data.appendChild(t);
+
+//      for (int i=0; i<descriptions.size(); i++) {
+//      String d = (String)descriptions.get(i);
+//      Element de = GSXML.createTextElement(this.doc, "desc", d);
+//      description_results.appendChild(de);
+//      }
+        System.err.println("end of search");
     } else if (type.equals("fetch")) {
         String docNum = (String)params.get("d");
@@ -176 +199 @@
         return result;
     }
+    System.err.println("returning result");
+    return result;
+    }
+
+    private DataBlock generateDataBlock(String collection_home, String view, Vector docNums, Vector descriptions) {
+
+    if (docNums.size()==0) {
+        return null;
+    }
+    DataBlock data = new DataBlock();
+
+    CKServer ck_server = new CKServer(collection_home, view);
     
-    return result;
-    }
+    /**** set data fields one by one and pass one what ever gets assembled ****/
+        
+    try{
+        
+        ck_server.setDescriptions(descriptions);
+        
+        /**** get candidate keywords ****/
+        
+        String[] keywords = ck_server.computeKeywords(docNums);
+        
+        data.words = keywords;
+        
+        
+        /**** get sparse document * keyword matrix ****/
+        
+        SparseMatrix matrix = ck_server.getSparseMatrix(docNums);
+        
+        data.matrix = matrix;
+        
+        
+        /**** get document indices, this is a subset of the original ****/
+        /**** those without keywords are excluded                    ****/
+        
+        int[] docs = ck_server.getHitDocuments();
+        
+        data.docs = docs;
+        
+        
+        String[] desc = ck_server.getHitDescriptions();
+        
+        data.descriptions = desc;
+        
+        
+        /**** get 10 or so clusters ****/
+        
+        Vector[] clusters = ck_server.getClusters();
+        
+        data.clusters = clusters;
+        
+        
+        double[][] centroids = ck_server.getCentroids();
+        
+        
+        /**** send their centroids through sammon mapping ****/
+        
+        Point2D[] sammon = ck_server.getSammonMap(centroids);
+        
+        System.err.println("Num descriptions: " + descriptions.size());
+        System.err.println("Num docs: " + docs.length);
+        System.err.println("Num desc: " + desc.length);
+        
+        data.sammon = sammon;
+        System.err.println("end of try in generatedatablock");
+    } catch (Exception e) {
+        System.err.println("VisServlet: computing clustering Error: "+e);
+        e.printStackTrace();
+    }
+    ck_server = null;
+    System.err.println("returning data");
+    return data;
+    }
+
 }