bundles/org.simantics.db.procore/src/org/simantics/db/procore/cluster/ClusterTraitsSmall.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 org.simantics.db.exception.DatabaseException;
  15 import org.simantics.db.impl.ClusterI;
  16 import org.simantics.db.impl.ClusterTraitsBase;
  17
  18
  19 public final class ClusterTraitsSmall extends ClusterTraitsBase {
  20     static final short FOREIGN_INDEX_BITS = 15;
  21     static final short FOREIGN_INDEX_MAX = (1<<FOREIGN_INDEX_BITS)-1;
  22     static final int VALUE_INDEX_BITS = 22;
  23     static final int VALUE_INDEX_MAX = (1<<VALUE_INDEX_BITS)-1;
  24     static final int VALUE_INDEX_EX = VALUE_INDEX_MAX;
  25     static final int VALUE_SIZE_BITS = 15;
  26     public static final int VALUE_SIZE_MAX = (1<<VALUE_SIZE_BITS)-1;
  27     public static final short makeForeignRef(short foreignIndex) {
  28         assert(foreignIndex <= FOREIGN_INDEX_MAX);
  29         return (short)(foreignIndex | 1<<FOREIGN_INDEX_BITS);
  30     }
  31     public static short resourceRefGetForeignIndex(short resourceRef)
  32     throws DatabaseException {
  33         if (resourceRef >>> FOREIGN_INDEX_BITS == 0)
  34             throw new DatabaseException("Local resource refence doesn't have foreing index. reference=" + resourceRef);
  35         return (short)(resourceRef & FOREIGN_INDEX_MAX);
  36     }
  37     public static boolean resourceRefIsLocal(short resourceRef) {
  38         return resourceRef > 0;
  39     }
  40     public static ClusterI.CompleteTypeEnum completeRefAndTypeGetType(int completeRefAndType) {
  41         return ClusterI.CompleteTypeEnum.make((completeRefAndType >>> 16) & 0x3);
  42     }
  43     public static short completeRefAndTypeGetRef(int completeRefAndType) {
  44         return (short)(completeRefAndType & (1<<16)-1);
  45     }
  46 }
  47