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SodaLongIndexComparator.java

00001 /*
00002  * OpenMobileIS - a free Java(TM) Framework for mobile applications Java(TM)
00003  * Copyright (C) 2004-2005 Philippe Delrieu
00004  * All rights reserved.
00005  * Contact: openmobileis@e-care.fr
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or any later version.
00011  *
00012  * This library is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
00020  * USA
00021  *
00022  *  Author : Philippe Delrieu
00023  *  
00024  *  Modifications :
00025  *  2004 Creation P.Delrieu
00026  *  2004 Modified by Romain Beaugrand
00027  * 
00028  */
00029 package org.openmobileis.database.fastobjectdb.db.query.soda;
00030 
00031 import org.openmobileis.common.util.collection.Array;
00032 
00039 public final class SodaLongIndexComparator extends SodaIndexComparator {
00040   private Array comparatorList;
00041 
00042   class LongOperande {
00043     int comparator=0;
00044     long operande;
00045     int traversal;
00046 
00047     LongOperande() {
00048     }
00049   }
00053   public SodaLongIndexComparator() {
00054     super();
00055     comparatorList = new Array();
00056   }
00057 
00058   public boolean setOperand(Object ope) {
00059         if (ope instanceof Long)        {
00060             LongOperande operand = new LongOperande();
00061             operand.operande = ((Long)ope).longValue();
00062             comparatorList.add(operand);
00063             return true;
00064         }
00065         return false;
00066   }
00067 
00068         public void mergeIndexComporator(SodaIndexComparator index)     {
00069                 SodaLongIndexComparator newindex = (SodaLongIndexComparator)index;
00070                 comparatorList.addArray(newindex.comparatorList);
00071         }
00072 
00073   public boolean addComparator(int comparator) {
00074     LongOperande comp = (LongOperande) comparatorList.getLastAdded();
00075     if (comp != null) {
00076         if (comp.comparator == BaseConstraint.COMPARATOR_NONE)  {
00077         comp.comparator = comparator;
00078         comp.traversal = this.getTraversalWayWithComparator(comp.comparator);
00079         } else  {
00080                                 //manage not or equals.
00081                                 if (comp.comparator == BaseConstraint.EQUALS)   {
00082                                         if (comparator == BaseConstraint.SMALLER)       {
00083                                                 comp.comparator = BaseConstraint.EQUALSMALLER;
00084                                         } else  if (comparator == BaseConstraint.GREATER)       {
00085                                                 comp.comparator = BaseConstraint.EQUALGREATER;
00086                                         } else  if (comparator == BaseConstraint.NOT)   {
00087                                                 comp.comparator = BaseConstraint.NOT;
00088                                         } else  if (comparator == BaseConstraint.EQUALS)        {
00089                                                 comp.comparator = BaseConstraint.EQUALS;
00090                                         }
00091                                 } else if (comp.comparator == BaseConstraint.NOT)       {
00092                                         if (comparator == BaseConstraint.SMALLER)       {
00093                                                 comp.comparator = BaseConstraint.EQUALGREATER;
00094                                         } else  if (comparator == BaseConstraint.GREATER)       {
00095                                                 comp.comparator = BaseConstraint.EQUALSMALLER;
00096                                         } else  if (comparator == BaseConstraint.EQUALS)        {
00097                                                 comp.comparator = BaseConstraint.NOT;
00098                                         } else  if (comparator == BaseConstraint.NOT)   {
00099                                                 comp.comparator = BaseConstraint.NOT;
00100                                         }
00101                                 } else if (comp.comparator == BaseConstraint.SMALLER)   {
00102                                         if (comparator == BaseConstraint.NOT)   {
00103                                                 comp.comparator = BaseConstraint.EQUALGREATER;
00104                                         } else  if (comparator == BaseConstraint.EQUALS)        {
00105                                                 comp.comparator = BaseConstraint.EQUALSMALLER;
00106                                         } else  if (comparator == BaseConstraint.GREATER)       {
00107                                                 comp.comparator = BaseConstraint.EQUALS;
00108                                         } else  if (comparator == BaseConstraint.SMALLER)       {
00109                                                 comp.comparator = BaseConstraint.SMALLER;
00110                                         }
00111                                 } else if (comp.comparator == BaseConstraint.GREATER)   {
00112                                         if (comparator == BaseConstraint.NOT)   {
00113                                                 comp.comparator = BaseConstraint.EQUALSMALLER;
00114                                         } else  if (comparator == BaseConstraint.EQUALS)        {
00115                                                 comp.comparator = BaseConstraint.EQUALGREATER;
00116                                         } else  if (comparator == BaseConstraint.SMALLER)       {
00117                                                 comp.comparator = BaseConstraint.EQUALS;
00118                                         } else  if (comparator == BaseConstraint.GREATER)       {
00119                                                 comp.comparator = BaseConstraint.GREATER;
00120                                         }
00121                                 } else  {
00122                                         LongOperande operand = new LongOperande();
00123                                         operand.operande = comp.operande;
00124                                         operand.comparator = comparator;
00125                                         operand.traversal = this.getTraversalWayWithComparator(operand.comparator);
00126                                         comparatorList.add(operand);
00127                                 }
00128         }
00129       return true;
00130     }
00131     return false;
00132   }
00133 
00134         public int getSearchAlgo()      {
00135                 if (comparatorList.size() == 0) {
00136                         return SodaIndexComparator.FULL_TRAVERSAL;
00137                 } else {
00138                         return ((LongOperande) comparatorList.get(0)).traversal;
00139                 }
00140         }
00141 
00146   public boolean isSelected(long searchInt) {
00147     boolean ret = true;
00148     int size = comparatorList.size();
00149     for (int i = 0; i < size && ret; i++) {
00150       ret = this.selectFisrtOperande((LongOperande) comparatorList.get(i), searchInt);
00151     }
00152     return ret;
00153   }
00154 
00159   public int compareTo(long searchInt) {
00160     if (comparatorList.size() == 0) {
00161       return -1; //force all tree traversal.
00162     } else {
00163       return this.compareFisrtOperande((LongOperande) comparatorList.get(0), searchInt);
00164     }
00165   }
00166 
00167         private boolean selectFisrtOperande(LongOperande op, long key) {
00168                 long test = key - op.operande;
00169                 switch (op.comparator) {
00170                         case BaseConstraint.EQUALS :
00171                                 return (test==0) ;
00172                         case BaseConstraint.SMALLER :
00173                                 return (test <0) ;
00174                         case BaseConstraint.EQUALSMALLER :
00175                                 return (test <=0) ;
00176                         case BaseConstraint.GREATER :
00177                                 return (test >0)  ;
00178                         case BaseConstraint.EQUALGREATER :
00179                                 return (test >=0)  ;
00180                         case BaseConstraint.NOT :
00181                                 return (test != 0)  ;
00182                 }
00183                 return true;
00184         }
00185 
00186   private int compareFisrtOperande(LongOperande op, long key) {
00187     switch (op.comparator) {
00188                         case BaseConstraint.EQUALS :
00189                         case BaseConstraint.SMALLER :
00190                         case BaseConstraint.EQUALSMALLER :
00191                         case BaseConstraint.NOT :
00192                                 return (int)(key - op.operande) ;
00193                         case BaseConstraint.GREATER :
00194                         case BaseConstraint.EQUALGREATER :
00195                                 return (int)(op.operande - key)  ;
00196     }
00197     return (int)(key - op.operande);
00198   }
00199 
00200 }

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