Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/entry/ci/BitLocatorImpl.java @ 34:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
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1 package org.dancres.blitz.entry.ci; |
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2 |
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3 import java.io.IOException; |
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4 |
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5 import org.dancres.blitz.oid.OID; |
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6 |
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7 import org.dancres.blitz.entry.TupleLocator; |
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8 |
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9 import org.dancres.struct.BitIndex; |
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10 import org.dancres.struct.BitVisitor; |
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11 |
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Dan Creswell <dan.creswell@gmail.com>
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12 /** |
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13 Used by CacheIndexer. |
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14 */ |
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15 class BitLocatorImpl implements TupleLocator { |
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16 private BitVisitor theHits; |
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17 private OID[] theOIDs; |
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18 private int theIndex = 0; |
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19 private OID theCurrent; |
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20 |
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21 BitLocatorImpl(BitIndex aHits, OID[] aListOfOIDs, boolean hitOnZero) { |
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22 theOIDs = aListOfOIDs; |
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23 theHits = aHits.getVisitor(hitOnZero); |
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24 } |
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25 |
3dc0c5604566
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Dan Creswell <dan.creswell@gmail.com>
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26 /** |
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27 Invoke this to load the next matching Tuple. |
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28 |
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29 @return <code>true</code> if there was a tuple, <code>false</code> |
3dc0c5604566
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30 otherwise |
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31 */ |
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32 public boolean fetchNext() throws IOException { |
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33 int myNext; |
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34 |
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35 while ((myNext = theHits.getNext()) != -1) { |
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36 theCurrent = (OID) theOIDs[myNext]; |
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parents:
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37 |
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38 if (theCurrent != null) |
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39 return true; |
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40 else { |
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41 /* |
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42 System.err.println("There should've been a OID here: " + |
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43 myNext); |
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44 */ |
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Dan Creswell <dan.creswell@gmail.com>
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45 } |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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46 } |
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47 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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48 return false; |
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Dan Creswell <dan.creswell@gmail.com>
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49 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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50 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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51 /** |
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52 @return the OID of the tuple just fetched with |
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53 <code>fetchNext</code> |
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54 */ |
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55 public OID getOID() { |
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56 return theCurrent; |
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57 } |
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Dan Creswell <dan.creswell@gmail.com>
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58 |
3dc0c5604566
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Dan Creswell <dan.creswell@gmail.com>
parents:
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59 /** |
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parents:
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60 When you've finished with the TupleLocator instance, call release. |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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61 */ |
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62 public void release() throws IOException { |
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63 // System.out.println("Iterated: " + theIndex); |
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64 } |
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65 } |