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
|
/*
* Copyright 2015 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Run this file with the `java_sample.sh` script.
import MyGame.Sample.Color;
import MyGame.Sample.Equipment;
import MyGame.Sample.Monster;
import MyGame.Sample.Vec3;
import MyGame.Sample.Weapon;
import com.google.flatbuffers.FlatBufferBuilder;
import java.nio.ByteBuffer;
class SampleBinary {
// Example how to use FlatBuffers to create and read binary buffers.
public static void main(String[] args) {
FlatBufferBuilder builder = new FlatBufferBuilder(0);
// Create some weapons for our Monster ('Sword' and 'Axe').
int weaponOneName = builder.createString("Sword");
short weaponOneDamage = 3;
int weaponTwoName = builder.createString("Axe");
short weaponTwoDamage = 5;
// Use the `createWeapon()` helper function to create the weapons, since we set every field.
int[] weaps = new int[2];
weaps[0] = Weapon.createWeapon(builder, weaponOneName, weaponOneDamage);
weaps[1] = Weapon.createWeapon(builder, weaponTwoName, weaponTwoDamage);
// Serialize the FlatBuffer data.
int name = builder.createString("Orc");
byte[] treasure = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
int inv = Monster.createInventoryVector(builder, treasure);
int weapons = Monster.createWeaponsVector(builder, weaps);
int pos = Vec3.createVec3(builder, 1.0f, 2.0f, 3.0f);
Monster.startMonster(builder);
Monster.addPos(builder, pos);
Monster.addName(builder, name);
Monster.addColor(builder, Color.Red);
Monster.addHp(builder, (short)300);
Monster.addInventory(builder, inv);
Monster.addWeapons(builder, weapons);
Monster.addEquippedType(builder, Equipment.Weapon);
Monster.addEquipped(builder, weaps[1]);
int orc = Monster.endMonster(builder);
builder.finish(orc); // You could also call `Monster.finishMonsterBuffer(builder, orc);`.
// We now have a FlatBuffer that can be stored on disk or sent over a network.
// ...Code to store to disk or send over a network goes here...
// Instead, we are going to access it right away, as if we just received it.
ByteBuffer buf = builder.dataBuffer();
// Get access to the root:
Monster monster = Monster.getRootAsMonster(buf);
// Note: We did not set the `mana` field explicitly, so we get back the default value.
assert monster.mana() == (short)150;
assert monster.hp() == (short)300;
assert monster.name().equals("Orc");
assert monster.color() == Color.Red;
assert monster.pos().x() == 1.0f;
assert monster.pos().y() == 2.0f;
assert monster.pos().z() == 3.0f;
// Get and test the `inventory` FlatBuffer `vector`.
for (int i = 0; i < monster.inventoryLength(); i++) {
assert monster.inventory(i) == (byte)i;
}
// Get and test the `weapons` FlatBuffer `vector` of `table`s.
String[] expectedWeaponNames = {"Sword", "Axe"};
int[] expectedWeaponDamages = {3, 5};
for (int i = 0; i < monster.weaponsLength(); i++) {
assert monster.weapons(i).name().equals(expectedWeaponNames[i]);
assert monster.weapons(i).damage() == expectedWeaponDamages[i];
}
// Get and test the `equipped` FlatBuffer `union`.
assert monster.equippedType() == Equipment.Weapon;
Weapon equipped = (Weapon)monster.equipped(new Weapon());
assert equipped.name().equals("Axe");
assert equipped.damage() == 5;
System.out.println("The FlatBuffer was successfully created and verified!");
}
}
|
