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
|
/*
Copyright (c) 2006 Benhur Stein
This file is part of Pajé.
Pajé is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
Pajé 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 Lesser General Public License
for more details.
You should have received a copy of the GNU Lesser General Public License
along with Pajé; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _EntityChunk_h_
#define _EntityChunk_h_
//
// EntityChunk
//
// contains entities of a type in a container in a slice of time
// (this is an abstract class, concrete subclasses are in PajeSimulator)
//
// Author: Edmar Pessoa Araújo Neto
//
#include <Foundation/Foundation.h>
#include "PajeEntity.h"
#include "PajeType.h"
#include "PajeContainer.h"
#include "PSortedArray.h"
@interface EntityChunk : NSObject //<NSCopying>
{
PajeContainer *container;
PajeEntityType *entityType;
NSDate *startTime;
NSDate *endTime;
enum { loading, frozen, empty, reloading } chunkState;
PSortedArray *entities;
NSArray *incompleteEntities;
// for LRU list of chunks
EntityChunk *prev;
EntityChunk *next;
}
// chunk has been touched -- move it to head of list
+ (void)touch:(EntityChunk *)chunk;
+ (void)emptyLeastRecentlyUsedChunks;
- (id)initWithEntityType:(PajeEntityType *)type
container:(PajeContainer *)pc;
- (void)dealloc;
/*
* Accessors
*/
- (PajeContainer *)container;
- (PajeEntityType *)entityType;
- (void)setStartTime:(NSDate *)time;
- (NSDate *)startTime;
- (void)setEndTime:(NSDate *)time;
- (NSDate *)endTime;
/*
* Accessing chunk state
*/
// can receive more entities
- (BOOL)isActive;
// cannot receive more entities; can be enumerated
- (BOOL)isFull;
// chunk with entities removed
- (BOOL)isZombie;
- (BOOL)canEnumerate;
- (BOOL)canInsert;
/*
* Changing chunk state
*/
// sent to a zombie to refill it
- (void)activate;
// sent to an active chunk to make it full
- (void)freeze;
// sent to a full chunk to empty it (make a zombie)
- (void)empty;
/*
* entity enumerators (must be in reverse [-endTime] order)
*/
// auxiliary methods used when creating enumerators
- (PSortedArray *)completeEntities;
- (NSArray *)incompleteEntities;
- (void)setIncompleteEntities:(NSArray *)array;
// only entities that finish inside the chunk's time boundaries
- (NSEnumerator *)enumeratorOfAllCompleteEntities;
//- (NSEnumerator *)enumeratorOfCompleteEntitiesAfterTime:(NSDate *)time;
- (NSEnumerator *)enumeratorOfCompleteEntitiesFromTime:(NSDate *)time;
// all entities, including those that finish after the chunk's endTime
- (NSEnumerator *)enumeratorOfAllEntities;
- (NSEnumerator *)enumeratorOfEntitiesBeforeTime:(NSDate *)time;
- (NSEnumerator *)enumeratorOfEntitiesFromTime:(NSDate *)sliceStartTime
toTime:(NSDate *)sliceEndTime;
// only completed entities, in non-reverse order
// include entities that end on those times.
- (NSEnumerator *)fwEnumeratorOfAllCompleteEntities;
- (NSEnumerator *)fwEnumeratorOfCompleteEntitiesFromTime:(NSDate *)time;
- (NSEnumerator *)fwEnumeratorOfCompleteEntitiesUntilTime:(NSDate *)time;
- (NSEnumerator *)fwEnumeratorOfCompleteEntitiesFromTime:(NSDate *)start
untilTime:(NSDate *)end;
- (int)entityCount;
- (id)lastEntity;
- (void)addEntity:(PajeEntity *)entity;
@end
#endif
|
