1 /* 2 * Copyright 2015 Google Inc. All rights reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 // Run this file with the `java_sample.sh` script. 18 19 import MyGame.Sample.Color; 20 import MyGame.Sample.Equipment; 21 import MyGame.Sample.Monster; 22 import MyGame.Sample.Vec3; 23 import MyGame.Sample.Weapon; 24 25 import com.google.flatbuffers.FlatBufferBuilder; 26 27 import java.nio.ByteBuffer; 28 29 class SampleBinary { 30 // Example how to use FlatBuffers to create and read binary buffers. main(String[] args)31 public static void main(String[] args) { 32 FlatBufferBuilder builder = new FlatBufferBuilder(0); 33 34 // Create some weapons for our Monster ('Sword' and 'Axe'). 35 int weaponOneName = builder.createString("Sword"); 36 short weaponOneDamage = 3; 37 int weaponTwoName = builder.createString("Axe"); 38 short weaponTwoDamage = 5; 39 40 // Use the `createWeapon()` helper function to create the weapons, since we set every field. 41 int[] weaps = new int[2]; 42 weaps[0] = Weapon.createWeapon(builder, weaponOneName, weaponOneDamage); 43 weaps[1] = Weapon.createWeapon(builder, weaponTwoName, weaponTwoDamage); 44 45 // Serialize the FlatBuffer data. 46 int name = builder.createString("Orc"); 47 byte[] treasure = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; 48 int inv = Monster.createInventoryVector(builder, treasure); 49 int weapons = Monster.createWeaponsVector(builder, weaps); 50 int pos = Vec3.createVec3(builder, 1.0f, 2.0f, 3.0f); 51 52 Monster.startMonster(builder); 53 Monster.addPos(builder, pos); 54 Monster.addName(builder, name); 55 Monster.addColor(builder, Color.Red); 56 Monster.addHp(builder, (short)300); 57 Monster.addInventory(builder, inv); 58 Monster.addWeapons(builder, weapons); 59 Monster.addEquippedType(builder, Equipment.Weapon); 60 Monster.addEquipped(builder, weaps[1]); 61 int orc = Monster.endMonster(builder); 62 63 builder.finish(orc); // You could also call `Monster.finishMonsterBuffer(builder, orc);`. 64 65 // We now have a FlatBuffer that can be stored on disk or sent over a network. 66 67 // ...Code to store to disk or send over a network goes here... 68 69 // Instead, we are going to access it right away, as if we just received it. 70 71 ByteBuffer buf = builder.dataBuffer(); 72 73 // Get access to the root: 74 Monster monster = Monster.getRootAsMonster(buf); 75 76 // Note: We did not set the `mana` field explicitly, so we get back the default value. 77 assert monster.mana() == (short)150; 78 assert monster.hp() == (short)300; 79 assert monster.name().equals("Orc"); 80 assert monster.color() == Color.Red; 81 assert monster.pos().x() == 1.0f; 82 assert monster.pos().y() == 2.0f; 83 assert monster.pos().z() == 3.0f; 84 85 // Get and test the `inventory` FlatBuffer `vector`. 86 for (int i = 0; i < monster.inventoryLength(); i++) { 87 assert monster.inventory(i) == (byte)i; 88 } 89 90 // Get and test the `weapons` FlatBuffer `vector` of `table`s. 91 String[] expectedWeaponNames = {"Sword", "Axe"}; 92 int[] expectedWeaponDamages = {3, 5}; 93 for (int i = 0; i < monster.weaponsLength(); i++) { 94 assert monster.weapons(i).name().equals(expectedWeaponNames[i]); 95 assert monster.weapons(i).damage() == expectedWeaponDamages[i]; 96 } 97 98 // Get and test the `equipped` FlatBuffer `union`. 99 assert monster.equippedType() == Equipment.Weapon; 100 Weapon equipped = (Weapon)monster.equipped(new Weapon()); 101 assert equipped.name().equals("Axe"); 102 assert equipped.damage() == 5; 103 104 System.out.println("The FlatBuffer was successfully created and verified!"); 105 } 106 } 107