Mercurial > hg > blitz_condensed
comparison src/org/dancres/blitz/entry/ci/CacheLineLocatorImpl.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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-1:000000000000 | 0:3dc0c5604566 |
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1 package org.dancres.blitz.entry.ci; | |
2 | |
3 import java.io.IOException; | |
4 | |
5 import org.dancres.blitz.oid.OID; | |
6 | |
7 import org.dancres.blitz.entry.TupleLocator; | |
8 | |
9 /** | |
10 Used by CacheIndexer. | |
11 */ | |
12 class CacheLineLocatorImpl implements TupleLocator { | |
13 private Object[] theOIDs; | |
14 private CacheLine theCacheLine; | |
15 | |
16 private int theIndex = 0; | |
17 private OID theCurrent; | |
18 | |
19 CacheLineLocatorImpl(Object[] aListOfOIDs, CacheLine aCacheLine) { | |
20 theOIDs = aListOfOIDs; | |
21 theCacheLine = aCacheLine; | |
22 } | |
23 | |
24 /** | |
25 Invoke this to load the next matching Tuple. | |
26 | |
27 @return <code>true</code> if there was a tuple, <code>false</code> | |
28 otherwise | |
29 */ | |
30 public boolean fetchNext() throws IOException { | |
31 if (theIndex >= theOIDs.length) | |
32 return false; | |
33 | |
34 theCurrent = (OID) theOIDs[theIndex++]; | |
35 return true; | |
36 } | |
37 | |
38 /** | |
39 @return the OID of the tuple just fetched with | |
40 <code>fetchNext</code> | |
41 */ | |
42 public OID getOID() { | |
43 return theCurrent; | |
44 } | |
45 | |
46 /** | |
47 When you've finished with the TupleLocator instance, call release. | |
48 */ | |
49 public void release() throws IOException { | |
50 // System.out.println("Iterated: " + theIndex); | |
51 } | |
52 } |