Robust/src/Util/OptimizedView.java

   1 import java.util.ArrayList;\r
   2 import java.util.Hashtable;\r
   3 import java.util.Set;\r
   4 \r
   5 public class OptimizedView extends MultiHash\r
   6 {\r
   7         private int bitMapView;\r
   8         private Hashtable table;\r
   9         private MultiHash parent;\r
  10 \r
  11         public OptimizedView(int bitMapView, Hashtable table, MultiHash parent) {\r
  12         this.bitMapView = bitMapView;\r
  13         this.table              = table;\r
  14         this.parent             = parent;\r
  15     }\r
  16 \r
  17         public void remove(Tuple o){\r
  18                 parent.remove(o);\r
  19         }\r
  20         public Tuples get(Tuples o){\r
  21                 Tuples tuple = new Tuple();\r
  22 \r
  23                 int tupleKey    = generateTupleKey(o);\r
  24                 if(table.containsKey(tupleKey)){\r
  25                         Set tupleSet = (Set) table.get(tupleKey);\r
  26                         tuple = convertToTuple(tupleSet);\r
  27                         return tuple;\r
  28                 }\r
  29                 return null;\r
  30         }\r
  31 \r
  32         private Tuples convertToTuple(Set tupleSet){\r
  33                 Object[] tuples = tupleSet.toArray();\r
  34                 ArrayList o             = new ArrayList();\r
  35                 for(int i = 0; i < tuples.length; i++){\r
  36                         o.add(tuples[i]);\r
  37                 }\r
  38                 Tuples tuple = new Tuple(o);\r
  39                 return tuple;\r
  40         }\r
  41 \r
  42         public int generateTupleKey(Tuples o){\r
  43                 ArrayList<Integer> indices = findIndices(bitMapView);\r
  44                 ArrayList       obj     =       new ArrayList();\r
  45                 for(int i = 0; i < indices.size(); i++){\r
  46                         obj.add(o.get(indices.get(i)));\r
  47                 }\r
  48                 return obj.hashCode()^29;\r
  49         }\r
  50 \r
  51         private ArrayList<Integer> findIndices(int viewIndex){\r
  52                 int mask = 1;\r
  53                 ArrayList<Integer> indices = new ArrayList<Integer>();\r
  54                 for(int i = 0; i < 31; i++){\r
  55                         if((mask & viewIndex) != 0){\r
  56                                 indices.add(i);\r
  57                         }\r
  58                         mask = mask << 1;\r
  59                 }\r
  60                 return indices;\r
  61         }\r
  62 \r
  63         public String toString(){\r
  64                 return table.toString();\r
  65         }\r
  66 }\r