bundles/org.simantics.db.procore/src/org/simantics/db/procore/cluster/ClusterMapSmall.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.procore.cluster;
  13
  14 import gnu.trove.map.hash.TIntShortHashMap;
  15
  16 import org.simantics.db.exception.DatabaseException;
  17 import org.simantics.db.impl.TableSizeListener;
  18 import org.simantics.db.service.ClusterUID;
  19 import org.simantics.db.service.ResourceUID;
  20
  21 public class ClusterMapSmall {
  22     private TableSizeListener sizeListener;
  23     private ForeignTableSmall foreignTable;
  24     //private TObjectIntHashMap<ResourceUID> hashMap;
  25     private TIntShortHashMap hashMap;
  26     public ClusterMapSmall(TableSizeListener sizeListener, ForeignTableSmall foreignTable) {
  27         this.sizeListener = sizeListener;
  28         this.foreignTable = foreignTable;
  29         hashMap = null;
  30     }
  31     public ResourceUID getForeignResourceUID(short reference) {
  32         assert(reference >>> 15 > 0);
  33         short foreignIndex = (short)(reference ^ 1<<15);
  34         return foreignTable.getResourceUID(foreignIndex);
  35     }
  36     public void compact() {
  37         if(hashMap == null) return;
  38         hashMap.compact();
  39         sizeListener.resized();
  40     }
  41     public int getUsedSpace() {
  42         if(hashMap == null) return 0;
  43         int size = hashMap.size();
  44         int cap = hashMap.capacity();
  45         // int[], Object[], actual objects
  46         return cap*(4+ObjectSizes.POINTER_SIZE)+size*ObjectSizes.ResourceUIDSize;
  47     }
  48
  49     public short getForeignReferenceOrCreateByResourceKey(int resourceKey, ClusterUID uid) throws DatabaseException {
  50         if (null == hashMap)
  51             hashMap = foreignTable.getResourceHashMap();
  52         short foreignIndex = hashMap.get(resourceKey);
  53         if (0 == foreignIndex) {
  54             if (hashMap.size() >= ClusterTraitsSmall.FOREIGN_INDEX_MAX)
  55                 throw new OutOfSpaceException("Out of space for foreign resources=" + hashMap.size());
  56             foreignIndex = foreignTable.createForeign(resourceKey, uid);
  57             hashMap.put(resourceKey, foreignIndex);
  58         }
  59         return foreignIndex;
  60     }
  61
  62     public short getForeignReferenceOrZero(int resourceKey) throws DatabaseException {
  63         if (null == hashMap)
  64             hashMap = foreignTable.getResourceHashMap();
  65         return hashMap.get(resourceKey);
  66     }
  67
  68
  69 }