Examples of java.util.BitSet

java.util.BitSet
This class implements a vector of bits that grows as needed. Each component of the bit set has a boolean value. The bits of a BitSet are indexed by nonnegative integers. Individual indexed bits can be examined, set, or cleared. One BitSet may be used to modify the contents of another BitSet through logical AND, logical inclusive OR, and logical exclusive OR operations.
By default, all bits in the set initially have the value false.
Every bit set has a current size, which is the number of bits of space currently in use by the bit set. Note that the size is related to the implementation of a bit set, so it may change with implementation. The length of a bit set relates to logical length of a bit set and is defined independently of implementation.
Unless otherwise noted, passing a null parameter to any of the methods in a BitSet will result in a NullPointerException.
A BitSet is not safe for multithreaded use without external synchronization. @author Arthur van Hoff @author Michael McCloskey @author Martin Buchholz @version 1.67, 04/07/06 @since JDK1.0

         * @param fgmd The Fetch Group
         * @return a list of field numbers
         */
        private BitSet getFieldsAbsoluteNumberInFetchGroup(FetchGroupMetaData fgmd)
        {
            BitSet fieldsNumber = new BitSet(0);
            for (int i = 0; i < fgmd.getMemberMetaData().length; i++)
            {
                int fieldNumber = getFieldNumber(cmd, fgmd.getMemberMetaData()[i].getName());
                if (fieldNumber == -1)
                {
                    throw new JPOXUserException(LOCALISER.msg("006000", 
                        fgmd.getMemberMetaData()[i].getName(), fgmd.getName(), cmd.getFullClassName())).setFatal();
                }
                fieldsNumber.set(fieldNumber);
            }
            // fields in nested fetch-groups
            for (int i = 0; i < fgmd.getFetchGroupMetaData().length; i++)
            {
                String nestedGroupName = fgmd.getFetchGroupMetaData()[i].getName();
                if (nestedGroupName.equals(FetchPlan.DEFAULT)) 
                {
                    setDefaultFieldNumbers(fieldsNumber);
                }
                else if (nestedGroupName.equals(FetchPlan.ALL)) 
                {
                    setAllFieldNumbers(fieldsNumber);
                }
                else if (nestedGroupName.equals(FetchPlan.NONE)) 
                {
                    setNoneFieldNumbers(fieldsNumber);
                }
                else
                {
                    FetchGroupMetaData nestedFGMD = getFetchGroupMetaData(cmd,nestedGroupName);
                    if (nestedFGMD == null)
                    {
                        throw new JPOXUserException(LOCALISER.msg("006001", 
                            fgmd.getFetchGroupMetaData()[i].getName(), fgmd.getName(), cmd.getFullClassName())).setFatal();
                    }
                    fieldsNumber.or(getFieldsAbsoluteNumberInFetchGroup(nestedFGMD));
                }
            }
            return fieldsNumber;
        }

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    @Override
    public void visitJumpInsn(final int opcode, final Label lbl) {
        super.visitJumpInsn(opcode, lbl);
        LabelNode ln = ((JumpInsnNode) instructions.getLast()).label;
        if (opcode == JSR && !subroutineHeads.containsKey(ln)) {
            subroutineHeads.put(ln, new BitSet());
        }
    }

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            markSubroutines();
            if (LOGGING) {
                log(mainSubroutine.toString());
                Iterator<BitSet> it = subroutineHeads.values().iterator();
                while (it.hasNext()) {
                    BitSet sub = it.next();
                    log(sub.toString());
                }
            }
            emitCode();
        }

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    /**
     * Walks the method and determines which internal subroutine(s), if any,
     * each instruction is a method of.
     */
    private void markSubroutines() {
        BitSet anyvisited = new BitSet();


        // First walk the main subroutine and find all those instructions which
        // can be reached without invoking any JSR at all
        markSubroutineWalk(mainSubroutine, 0, anyvisited);


        // Go through the head of each subroutine and find any nodes reachable
        // to that subroutine without following any JSR links.
        for (Iterator<Map.Entry<LabelNode,BitSet>> it = subroutineHeads.entrySet().iterator(); it.hasNext();)
        {
            Map.Entry<LabelNode,BitSet> entry = it.next();
            LabelNode lab = entry.getKey();
            BitSet sub = entry.getValue();
            int index = instructions.indexOf(lab);
            markSubroutineWalk(sub, index, anyvisited);
        }
    }

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                            + " is a RET not owned by any subroutine");
                }
                newInstructions.add(new JumpInsnNode(GOTO, retlabel));
            } else if (insn.getOpcode() == JSR) {
                LabelNode lbl = ((JumpInsnNode) insn).label;
                BitSet sub = subroutineHeads.get(lbl);
                Instantiation newinst = new Instantiation(instant, sub);
                LabelNode startlbl = newinst.gotoLabel(lbl);


                if (LOGGING) {
                    log(" Creating instantiation of subr " + sub);

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   */
  protected List<Identity> getEventParticipants(KalendarEvent event) {
    List<Identity> identities = new ArrayList<Identity>();
    List<KalendarEvent> lstEvent = new ArrayList<KalendarEvent>();
    lstEvent.add(event);
    BitSet selection = new BitSet(1);
    selection.set(0);
    identities = getSelectedEventParticipants(lstEvent, selection);
    return identities;
  }

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      }
    } else if(source == editChecklistTable) {
      if(event instanceof TableMultiSelectEvent) {
        TableMultiSelectEvent tmse = (TableMultiSelectEvent)event;
        if(tmse.getAction().equals("save")) {
          BitSet selection = tmse.getSelection();
          updateCheckpointsFor(selectedIdentity, selection);
          initManageTable(ureq);
        }
        cmc.deactivate();
      }

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          CloseableModalController manageParticipantsModalCntrl = new CloseableModalController(getWindowControl(), "close", participantsVC, true, translate("dates.table.participant.manage"));
          manageParticipantsModalCntrl.activate();
        }
      } else {
        TableMultiSelectEvent tmse = (TableMultiSelectEvent)event;
        BitSet selection = tmse.getSelection();
        //delete all users from the selected dates
        if(tmse.getAction().equals(DENListTableDataModel.DELETE_ACTION) && selection.cardinality() > 0) {
          removed = denManager.getSelectedEventParticipants(dateList, selection);
          dateList = denManager.deleteParticipants(ores, courseNode, denManager.getSelectedEventIDs(dateList, selection));
          listTableData.setObjects(dateList);
          //send notification mail
          createRemovedNotificationMail(ureq, dateList.get(0).getSubject());
        } else if(tmse.getAction().equals(DENListTableDataModel.MAIL_ACTION) && selection.cardinality() > 0) {
          //send email to all users from the selected dates
          List<Identity> participants = denManager.getSelectedEventParticipants(dateList, selection);
          createParticipantsMail(ureq, participants);
        } else if(selection.cardinality() == 0) {
          getWindowControl().setWarning(translate("participants.message.empty"));
        }
      }
    } else if(source == formManageParticipants && event == DENManageParticipantsForm.ADD_PARTICIPANTS) {
      //open user search controller to manually add users in date

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        }
        else if ((flags&FLAG_RETRIEVING_DETACHED_STATE)!=0)
        {
            // Retrieving the detached state from the detached object
            // Don't need the id or version since they can't change
            BitSet jdoLoadedFields = (BitSet)currentState[2];
            for (int i = 0; i < this.loadedFields.length; i++)
            {
                this.loadedFields[i] = jdoLoadedFields.get(i);
            }


            BitSet jdoModifiedFields = (BitSet)currentState[3];
            for (int i = 0; i < dirtyFields.length; i++)
            {
                dirtyFields[i] = jdoModifiedFields.get(i);
            }
            setVersion(currentState[1]);
            return currentState;
        }
        else
        {
            // Updating the detached state in the detached object with our state
            Object[] state = new Object[4];
            state[0] = myID;
            state[1] = getVersion(myPC);


            // Loaded fields
            BitSet loadedState = new BitSet();
            for (int i = 0; i < loadedFields.length; i++)
            {
                if (loadedFields[i])
                {
                    loadedState.set(i);
                }
                else
                {
                    loadedState.clear(i);
                }
            }
            state[2] = loadedState;


            // Modified fields
            BitSet modifiedState = new BitSet();
            for (int i = 0; i < dirtyFields.length; i++)
            {
                if (dirtyFields[i])
                {
                    modifiedState.set(i);
                }
                else
                {
                    modifiedState.clear(i);
                }
            }
            state[3] = modifiedState;


            return state;

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  public CollisionMap(final int width, final int height) {
    this.width = width;
    this.height = height;
    colls = new BitSet[width];
    for (int i = 0; i < width; i++) {
      colls[i] = new BitSet();
    }


  }

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