flatbuffers/samples/SampleBinary.java at master · golang4gg/flatbuffers · GitHub

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* 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];

}

Weapon.Vector weaponsVector = monster.weaponsVector();

for (int i = 0; i < weaponsVector.length(); i++) {

assert weaponsVector.get(i).name().equals(expectedWeaponNames[i]);

assert weaponsVector.get(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!");

}

flatbuffers/samples/SampleBinary.java at master · golang4gg/flatbuffers · GitHub

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