-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
RecordPropertyCursor.java
408 lines (367 loc) · 11.2 KB
/
RecordPropertyCursor.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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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.kernel.impl.storageengine.impl.recordstorage;
import java.nio.ByteBuffer;
import java.util.function.IntPredicate;
import org.neo4j.io.pagecache.PageCursor;
import org.neo4j.kernel.impl.store.GeometryType;
import org.neo4j.kernel.impl.store.LongerShortString;
import org.neo4j.kernel.impl.store.PropertyStore;
import org.neo4j.kernel.impl.store.PropertyType;
import org.neo4j.kernel.impl.store.ShortArray;
import org.neo4j.kernel.impl.store.TemporalType;
import org.neo4j.kernel.impl.store.record.PropertyBlock;
import org.neo4j.kernel.impl.store.record.PropertyRecord;
import org.neo4j.kernel.impl.store.record.RecordLoad;
import org.neo4j.kernel.impl.util.Bits;
import org.neo4j.storageengine.api.StoragePropertyCursor;
import org.neo4j.string.UTF8;
import org.neo4j.values.storable.ArrayValue;
import org.neo4j.values.storable.BooleanValue;
import org.neo4j.values.storable.ByteValue;
import org.neo4j.values.storable.DoubleValue;
import org.neo4j.values.storable.FloatValue;
import org.neo4j.values.storable.IntValue;
import org.neo4j.values.storable.LongValue;
import org.neo4j.values.storable.ShortValue;
import org.neo4j.values.storable.TextValue;
import org.neo4j.values.storable.Value;
import org.neo4j.values.storable.ValueGroup;
import org.neo4j.values.storable.Values;
class RecordPropertyCursor extends PropertyRecord implements StoragePropertyCursor
{
private static final int MAX_BYTES_IN_SHORT_STRING_OR_SHORT_ARRAY = 32;
private static final int INITIAL_POSITION = -1;
private final PropertyStore read;
private long next;
private int block;
public ByteBuffer buffer;
private PageCursor page;
private PageCursor stringPage;
private PageCursor arrayPage;
private boolean open;
RecordPropertyCursor( PropertyStore read )
{
super( NO_ID );
this.read = read;
}
@Override
public void init( long reference )
{
if ( getId() != NO_ID )
{
clear();
}
//Set to high value to force a read
this.block = Integer.MAX_VALUE;
if ( reference != NO_ID )
{
if ( page == null )
{
page = propertyPage( reference );
}
}
// Store state
this.next = reference;
this.open = true;
}
@Override
public boolean next( IntPredicate filter )
{
while ( true )
{
//Figure out number of blocks of record
int numberOfBlocks = getNumberOfBlocks();
while ( block < numberOfBlocks )
{
//We have just read a record, so we are at the beginning
if ( block == INITIAL_POSITION )
{
block = 0;
}
else
{
//Figure out the type and how many blocks that are used
long current = currentBlock();
PropertyType type = PropertyType.getPropertyTypeOrNull( current );
if ( type == null )
{
break;
}
block += type.calculateNumberOfBlocksUsed( current );
}
//nothing left, need to read a new record
if ( block >= numberOfBlocks || type() == null )
{
break;
}
if ( !filter.test( propertyKey() ) )
{
return true;
}
}
if ( next == NO_ID )
{
return false;
}
property( this, next, page );
next = getNextProp();
block = INITIAL_POSITION;
}
}
private long currentBlock()
{
return getBlocks()[block];
}
@Override
public void close()
{
if ( open )
{
open = false;
clear();
}
}
@Override
public int propertyKey()
{
return PropertyBlock.keyIndexId( currentBlock() );
}
@Override
public ValueGroup propertyType()
{
PropertyType type = type();
if ( type == null )
{
return ValueGroup.NO_VALUE;
}
switch ( type )
{
case BOOL:
return ValueGroup.BOOLEAN;
case BYTE:
case SHORT:
case INT:
case LONG:
case FLOAT:
case DOUBLE:
return ValueGroup.NUMBER;
case STRING:
case CHAR:
case SHORT_STRING:
return ValueGroup.TEXT;
case SHORT_ARRAY:
case ARRAY:
default:
throw new UnsupportedOperationException( "not implemented" );
}
}
private PropertyType type()
{
return PropertyType.getPropertyTypeOrNull( currentBlock() );
}
@Override
public Value propertyValue()
{
return readValue();
}
private Value readValue()
{
PropertyType type = type();
if ( type == null )
{
return Values.NO_VALUE;
}
switch ( type )
{
case BOOL:
return readBoolean();
case BYTE:
return readByte();
case SHORT:
return readShort();
case INT:
return readInt();
case LONG:
return readLong();
case FLOAT:
return readFloat();
case DOUBLE:
return readDouble();
case CHAR:
return readChar();
case SHORT_STRING:
return readShortString();
case SHORT_ARRAY:
return readShortArray();
case STRING:
return readLongString();
case ARRAY:
return readLongArray();
case GEOMETRY:
return geometryValue();
case TEMPORAL:
return temporalValue();
default:
throw new IllegalStateException( "Unsupported PropertyType: " + type.name() );
}
}
private Value geometryValue()
{
return GeometryType.decode( getBlocks(), block );
}
private Value temporalValue()
{
return TemporalType.decode( getBlocks(), block );
}
private ArrayValue readLongArray()
{
long reference = PropertyBlock.fetchLong( currentBlock() );
if ( arrayPage == null )
{
arrayPage = arrayPage( reference );
}
return array( this, reference, arrayPage );
}
private TextValue readLongString()
{
long reference = PropertyBlock.fetchLong( currentBlock() );
if ( stringPage == null )
{
stringPage = stringPage( reference );
}
return string( this, reference, stringPage );
}
private Value readShortArray()
{
Bits bits = Bits.bits( MAX_BYTES_IN_SHORT_STRING_OR_SHORT_ARRAY );
int blocksUsed = ShortArray.calculateNumberOfBlocksUsed( currentBlock() );
for ( int i = 0; i < blocksUsed; i++ )
{
bits.put( getBlocks()[block + i] );
}
return ShortArray.decode( bits );
}
private TextValue readShortString()
{
return LongerShortString
.decode( getBlocks(), block, LongerShortString.calculateNumberOfBlocksUsed( currentBlock() ) );
}
private TextValue readChar()
{
return Values.charValue( (char) PropertyBlock.fetchShort( currentBlock() ) );
}
private DoubleValue readDouble()
{
return Values.doubleValue( Double.longBitsToDouble( getBlocks()[block + 1] ) );
}
private FloatValue readFloat()
{
return Values.floatValue( Float.intBitsToFloat( PropertyBlock.fetchInt( currentBlock() ) ) );
}
private LongValue readLong()
{
if ( PropertyBlock.valueIsInlined( currentBlock() ) )
{
return Values.longValue( PropertyBlock.fetchLong( currentBlock() ) >>> 1 );
}
else
{
return Values.longValue( getBlocks()[block + 1] );
}
}
private IntValue readInt()
{
return Values.intValue( PropertyBlock.fetchInt( currentBlock() ) );
}
private ShortValue readShort()
{
return Values.shortValue( PropertyBlock.fetchShort( currentBlock() ) );
}
private ByteValue readByte()
{
return Values.byteValue( PropertyBlock.fetchByte( currentBlock() ) );
}
private BooleanValue readBoolean()
{
return Values.booleanValue( PropertyBlock.fetchByte( currentBlock() ) == 1 );
}
public String toString()
{
if ( !open )
{
return "PropertyCursor[closed state]";
}
else
{
return "PropertyCursor[id=" + getId() + ", open state with: block=" + block + ", next=" + next +
", underlying record=" + super.toString() + " ]";
}
}
@Override
public void release()
{
if ( stringPage != null )
{
stringPage.close();
stringPage = null;
}
if ( arrayPage != null )
{
arrayPage.close();
arrayPage = null;
}
if ( page != null )
{
page.close();
page = null;
}
}
private PageCursor propertyPage( long reference )
{
return read.openPageCursorForReading( reference );
}
private PageCursor stringPage( long reference )
{
return read.openStringPageCursor( reference );
}
private PageCursor arrayPage( long reference )
{
return read.openArrayPageCursor( reference );
}
private void property( PropertyRecord record, long reference, PageCursor pageCursor )
{
// We need to load forcefully here since otherwise we can have inconsistent reads
// for properties across blocks, see org.neo4j.graphdb.ConsistentPropertyReadsIT
read.getRecordByCursor( reference, record, RecordLoad.FORCE, pageCursor );
}
private TextValue string( RecordPropertyCursor cursor, long reference, PageCursor page )
{
ByteBuffer buffer = cursor.buffer = read.loadString( reference, cursor.buffer, page );
buffer.flip();
return Values.stringValue( UTF8.decode( buffer.array(), 0, buffer.limit() ) );
}
private ArrayValue array( RecordPropertyCursor cursor, long reference, PageCursor page )
{
ByteBuffer buffer = cursor.buffer = read.loadArray( reference, cursor.buffer, page );
buffer.flip();
return PropertyStore.readArrayFromBuffer( buffer );
}
}