-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
LabelChainWalker.java
103 lines (92 loc) · 3.8 KB
/
LabelChainWalker.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.consistency.checking;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.neo4j.consistency.report.ConsistencyReport;
import org.neo4j.consistency.store.RecordAccess;
import org.neo4j.kernel.impl.store.LabelIdArray;
import org.neo4j.kernel.impl.store.PropertyType;
import org.neo4j.kernel.impl.store.record.AbstractBaseRecord;
import org.neo4j.kernel.impl.store.record.DynamicRecord;
import org.neo4j.kernel.impl.store.record.Record;
import static org.neo4j.kernel.impl.store.AbstractDynamicStore.readFullByteArrayFromHeavyRecords;
import static org.neo4j.kernel.impl.store.DynamicArrayStore.getRightArray;
public class LabelChainWalker<RECORD extends AbstractBaseRecord, REPORT extends ConsistencyReport> implements
ComparativeRecordChecker<RECORD, DynamicRecord, REPORT>
{
private final Validator<RECORD, REPORT> validator;
private final HashMap<Long, DynamicRecord> recordIds = new HashMap<>();
private final List<DynamicRecord> recordList = new ArrayList<>();
private boolean allInUse = true;
public LabelChainWalker( Validator<RECORD, REPORT> validator )
{
this.validator = validator;
}
@Override
public void checkReference( RECORD record, DynamicRecord dynamicRecord,
CheckerEngine<RECORD, REPORT> engine,
RecordAccess records )
{
recordIds.put( dynamicRecord.getId(), dynamicRecord );
if ( dynamicRecord.inUse() )
{
recordList.add( dynamicRecord );
}
else
{
allInUse = false;
validator.onRecordNotInUse( dynamicRecord, engine );
}
long nextBlock = dynamicRecord.getNextBlock();
if ( Record.NO_NEXT_BLOCK.is( nextBlock ) )
{
if ( allInUse )
{
// only validate label ids if all dynamic records seen were in use
validator.onWellFormedChain( labelIds( recordList ), engine, records );
}
}
else
{
if ( recordIds.containsKey( nextBlock ) )
{
validator.onRecordChainCycle( recordIds.get( nextBlock ), engine );
}
else
{
engine.comparativeCheck( records.nodeLabels( nextBlock ), this );
}
}
}
public static long[] labelIds( List<DynamicRecord> recordList )
{
long[] idArray =
(long[]) getRightArray( readFullByteArrayFromHeavyRecords( recordList, PropertyType.ARRAY ) ).asObject();
return LabelIdArray.stripNodeId( idArray );
}
public interface Validator<RECORD extends AbstractBaseRecord, REPORT extends ConsistencyReport>
{
void onRecordNotInUse( DynamicRecord dynamicRecord, CheckerEngine<RECORD, REPORT> engine );
void onRecordChainCycle( DynamicRecord record, CheckerEngine<RECORD, REPORT> engine );
void onWellFormedChain( long[] labelIds, CheckerEngine<RECORD, REPORT> engine, RecordAccess records );
}
}