import java.util.Hashtable;\r
import java.util.Set;\r
\r
-public class MultiHash{\r
- private int[] views;\r
- private Hashtable viewTable = new Hashtable();\r
+public class MultiHash {\r
+ private int[] views;\r
+ private Hashtable viewTable = new Hashtable();\r
\r
- public MultiHash(){\r
- }\r
- \r
- // Pass in the look up map\r
- public MultiHash(int[] bitmapArray){\r
- this.views = bitmapArray;\r
- for(int i = 0; i < views.length; i++){\r
- Hashtable ht = new Hashtable();\r
- viewTable.put(views[i], ht);\r
- }\r
- }\r
+ public MultiHash() {\r
+ }\r
\r
- // For each view add it to its view hashtable\r
- public void put(Tuples o){\r
- // Tune the Tuple for each view and add it to its designated hashtable\r
- for(int i = 0; i < views.length; i++){\r
- int tupleKey = generateTupleKey(o, views[i]);\r
- Hashtable tuplesTable = (Hashtable) viewTable.get(views[i]);\r
- if(tuplesTable.containsKey(tupleKey)){\r
- Set tupleSet = (Set) tuplesTable.get(tupleKey);\r
- tupleSet.add(o);\r
- }else{\r
- Set tupleSet = new HashSet();\r
- tupleSet.add(o);\r
- tuplesTable.put(tupleKey, tupleSet);\r
- }\r
- }\r
- }\r
+ // Pass in the look up map\r
+ public MultiHash(int[] bitmapArray) {\r
+ this.views = bitmapArray;\r
+ for(int i = 0; i < views.length; i++) {\r
+ Hashtable ht = new Hashtable();\r
+ viewTable.put(views[i], ht);\r
+ }\r
+ }\r
\r
- public int generateTupleKey(Tuples o, int viewIndex){\r
- ArrayList<Integer> indices = findIndices(viewIndex);\r
- ArrayList obj = new ArrayList();\r
- for(int i = 0; i < indices.size(); i++){\r
- obj.add(o.get(indices.get(i)));\r
- }\r
- return obj.hashCode()^29;\r
- }\r
+ // For each view add it to its view hashtable\r
+ public void put(Tuples o) {\r
+ // Tune the Tuple for each view and add it to its designated hashtable\r
+ for(int i = 0; i < views.length; i++) {\r
+ int tupleKey = generateTupleKey(o, views[i]);\r
+ Hashtable tuplesTable = (Hashtable) viewTable.get(views[i]);\r
+ if(tuplesTable.containsKey(tupleKey)) {\r
+ Set tupleSet = (Set) tuplesTable.get(tupleKey);\r
+ tupleSet.add(o);\r
+ } else {\r
+ Set tupleSet = new HashSet();\r
+ tupleSet.add(o);\r
+ tuplesTable.put(tupleKey, tupleSet);\r
+ }\r
+ }\r
+ }\r
\r
- private ArrayList<Integer> findIndices(int viewIndex){\r
- int mask = 1;\r
- ArrayList<Integer> indices = new ArrayList<Integer>();\r
- for(int i = 0; i < 31; i++){\r
- if((mask & viewIndex) != 0){\r
- indices.add(i);\r
- }\r
- mask = mask << 1;\r
- }\r
- return indices;\r
- }\r
+ public int generateTupleKey(Tuples o, int viewIndex) {\r
+ ArrayList<Integer> indices = findIndices(viewIndex);\r
+ ArrayList obj = new ArrayList();\r
+ for(int i = 0; i < indices.size(); i++) {\r
+ obj.add(o.get(indices.get(i)));\r
+ }\r
+ return obj.hashCode()^29;\r
+ }\r
\r
- public Tuples get(int bitmap, Tuple o){\r
- Tuples tuple = new Tuple(); //\r
- int tupleKey = generateTupleKey(o, bitmap);\r
- Hashtable tuplesTable = (Hashtable) viewTable.get(bitmap);\r
- if(tuplesTable.containsKey(tupleKey)){\r
- Set tupleSet = (Set) tuplesTable.get(tupleKey);\r
- tuple = convertToTuple(tupleSet);\r
- return tuple;\r
- }\r
- return null;\r
- }\r
+ private ArrayList<Integer> findIndices(int viewIndex) {\r
+ int mask = 1;\r
+ ArrayList<Integer> indices = new ArrayList<Integer>();\r
+ for(int i = 0; i < 31; i++) {\r
+ if((mask & viewIndex) != 0) {\r
+ indices.add(i);\r
+ }\r
+ mask = mask << 1;\r
+ }\r
+ return indices;\r
+ }\r
\r
- private Tuples convertToTuple(Set tupleSet){\r
- Object[] tuples = tupleSet.toArray();\r
- ArrayList o = new ArrayList();\r
- for(int i = 0; i < tuples.length; i++){\r
- o.add(tuples[i]);\r
- }\r
- Tuples tuple = new Tuple(o);\r
- return tuple;\r
- }\r
+ public Tuples get(int bitmap, Tuple o) {\r
+ Tuples tuple = new Tuple(); //\r
+ int tupleKey = generateTupleKey(o, bitmap);\r
+ Hashtable tuplesTable = (Hashtable) viewTable.get(bitmap);\r
+ if(tuplesTable.containsKey(tupleKey)) {\r
+ Set tupleSet = (Set) tuplesTable.get(tupleKey);\r
+ tuple = convertToTuple(tupleSet);\r
+ return tuple;\r
+ }\r
+ return null;\r
+ }\r
\r
- public void remove(Tuples o){\r
+ private Tuples convertToTuple(Set tupleSet) {\r
+ Object[] tuples = tupleSet.toArray();\r
+ ArrayList o = new ArrayList();\r
+ for(int i = 0; i < tuples.length; i++) {\r
+ o.add(tuples[i]);\r
+ }\r
+ Tuples tuple = new Tuple(o);\r
+ return tuple;\r
+ }\r
+\r
+ public void remove(Tuples o) {\r
// System.out.println("removed called"+viewTable.toString());\r
- for(int i = 0; i < views.length; i++){\r
- int tupleKey = generateTupleKey(o, views[i]);\r
- Hashtable tuplesTable = (Hashtable) viewTable.get(views[i]);\r
- if(tuplesTable.containsKey(tupleKey)){\r
- tuplesTable.remove(tupleKey);\r
- }else{\r
- System.out.println("Cannot find such key");\r
- }\r
- }\r
- }\r
+ for(int i = 0; i < views.length; i++) {\r
+ int tupleKey = generateTupleKey(o, views[i]);\r
+ Hashtable tuplesTable = (Hashtable) viewTable.get(views[i]);\r
+ if(tuplesTable.containsKey(tupleKey)) {\r
+ tuplesTable.remove(tupleKey);\r
+ } else {\r
+ System.out.println("Cannot find such key");\r
+ }\r
+ }\r
+ }\r
+\r
+ public OptimizedView getOptimizedView(int bitMapView) {\r
+ Hashtable tmp = (Hashtable) viewTable.get(bitMapView);\r
+ OptimizedView ov = new OptimizedView(bitMapView, tmp, this);\r
+ return ov;\r
+ }\r
+\r
+ /* Debug visualizations */\r
+ public void drawTierTwoTable() {\r
+ for(int i = 0; i < views.length; i++) {\r
+ Hashtable tmp = (Hashtable) viewTable.get(views[i]);\r
+ System.out.println("Hashtable "+i+":\t"+tmp.keySet().toString());\r
+ Object[] keySets = tmp.keySet().toArray();\r
+ for(int j = 0; j < keySets.length; j++) {\r
+ System.out.println(tmp.get(keySets[j]));\r
+ }\r
+ }\r
+ }\r
\r
- public OptimizedView getOptimizedView(int bitMapView){\r
- Hashtable tmp = (Hashtable) viewTable.get(bitMapView);\r
- OptimizedView ov = new OptimizedView(bitMapView, tmp, this);\r
- return ov;\r
- }\r
+ public int[] getViews() {\r
+ return views;\r
+ }\r
\r
- /* Debug visualizations */\r
- public void drawTierTwoTable(){\r
- for(int i = 0; i < views.length; i++){\r
- Hashtable tmp = (Hashtable) viewTable.get(views[i]);\r
- System.out.println("Hashtable "+i+":\t"+tmp.keySet().toString());\r
- Object[] keySets = tmp.keySet().toArray();\r
- for(int j = 0; j < keySets.length; j++){\r
- System.out.println(tmp.get(keySets[j]));\r
- }\r
- }\r
- }\r
- \r
- public int[] getViews(){\r
- return views;\r
- }\r
- \r
- public Hashtable getTable(){\r
- return viewTable;\r
- }\r
+ public Hashtable getTable() {\r
+ return viewTable;\r
+ }\r
}\r
projects / IRC.git / blobdiff