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/*
* Copyright 2014 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.
*/
import java.io.*;
import java.nio.ByteBuffer;
import MyGame.Example.*;
import com.google.flatbuffers.FlatBufferBuilder;
class JavaTest {
public static void main(String[] args) {
// First, let's test reading a FlatBuffer generated by C++ code:
// This file was generated from monsterdata_test.json
byte[] data = null;
File file = new File("monsterdata_test.mon");
RandomAccessFile f = null;
try {
f = new RandomAccessFile(file, "r");
data = new byte[(int)f.length()];
f.readFully(data);
f.close();
} catch(java.io.IOException e) {
System.out.println("FlatBuffers test: couldn't read file");
return;
}
// Now test it:
ByteBuffer bb = ByteBuffer.wrap(data);
TestBuffer(bb);
// Second, let's create a FlatBuffer from scratch in Java, and test it also.
// We use an initial size of 1 to exercise the reallocation algorithm,
// normally a size larger than the typical FlatBuffer you generate would be
// better for performance.
FlatBufferBuilder fbb = new FlatBufferBuilder(1);
// We set up the same values as monsterdata.json:
int str = fbb.createString("MyMonster");
int inv = Monster.createInventoryVector(fbb, new byte[] { 0, 1, 2, 3, 4 });
int fred = fbb.createString("Fred");
Monster.startMonster(fbb);
Monster.addName(fbb, fred);
int mon2 = Monster.endMonster(fbb);
Monster.startTest4Vector(fbb, 2);
Test.createTest(fbb, (short)10, (byte)20);
Test.createTest(fbb, (short)30, (byte)40);
int test4 = fbb.endVector();
int testArrayOfString = Monster.createTestarrayofstringVector(fbb, new int[] {
fbb.createString("test1"),
fbb.createString("test2")
});
Monster.startMonster(fbb);
Monster.addPos(fbb, Vec3.createVec3(fbb, 1.0f, 2.0f, 3.0f, 3.0,
Color.Green, (short)5, (byte)6));
Monster.addHp(fbb, (short)80);
Monster.addName(fbb, str);
Monster.addInventory(fbb, inv);
Monster.addTestType(fbb, (byte)Any.Monster);
Monster.addTest(fbb, mon2);
Monster.addTest4(fbb, test4);
Monster.addTestarrayofstring(fbb, testArrayOfString);
int mon = Monster.endMonster(fbb);
Monster.finishMonsterBuffer(fbb, mon);
// Write the result to a file for debugging purposes:
// Note that the binaries are not necessarily identical, since the JSON
// parser may serialize in a slightly different order than the above
// Java code. They are functionally equivalent though.
try {
DataOutputStream os = new DataOutputStream(new FileOutputStream(
"monsterdata_java_wire.mon"));
os.write(fbb.dataBuffer().array(), fbb.dataBuffer().position(), fbb.offset());
os.close();
} catch(java.io.IOException e) {
System.out.println("FlatBuffers test: couldn't write file");
return;
}
// Test it:
TestBuffer(fbb.dataBuffer());
// Make sure it also works with read only ByteBuffers. This is slower,
// since creating strings incurs an additional copy
// (see Table.__string).
TestBuffer(fbb.dataBuffer().asReadOnlyBuffer());
TestEnums();
System.out.println("FlatBuffers test: completed successfully");
}
static void TestEnums() {
TestEq(Color.name(Color.Red), "Red");
TestEq(Color.name(Color.Blue), "Blue");
TestEq(Any.name(Any.NONE), "NONE");
TestEq(Any.name(Any.Monster), "Monster");
}
static void TestBuffer(ByteBuffer bb) {
TestEq(Monster.MonsterBufferHasIdentifier(bb), true);
Monster monster = Monster.getRootAsMonster(bb);
TestEq(monster.hp(), (short)80);
TestEq(monster.mana(), (short)150); // default
TestEq(monster.name(), "MyMonster");
// monster.friendly() // can't access, deprecated
Vec3 pos = monster.pos();
TestEq(pos.x(), 1.0f);
TestEq(pos.y(), 2.0f);
TestEq(pos.z(), 3.0f);
TestEq(pos.test1(), 3.0);
TestEq(pos.test2(), Color.Green);
Test t = pos.test3();
TestEq(t.a(), (short)5);
TestEq(t.b(), (byte)6);
TestEq(monster.testType(), (byte)Any.Monster);
Monster monster2 = new Monster();
TestEq(monster.test(monster2) != null, true);
TestEq(monster2.name(), "Fred");
TestEq(monster.inventoryLength(), 5);
int invsum = 0;
for (int i = 0; i < monster.inventoryLength(); i++)
invsum += monster.inventory(i);
TestEq(invsum, 10);
// Alternative way of accessing a vector:
ByteBuffer ibb = monster.inventoryAsByteBuffer();
invsum = 0;
while (ibb.position() < ibb.limit())
invsum += ibb.get();
TestEq(invsum, 10);
Test test_0 = monster.test4(0);
Test test_1 = monster.test4(1);
TestEq(monster.test4Length(), 2);
TestEq(test_0.a() + test_0.b() + test_1.a() + test_1.b(), 100);
TestEq(monster.testarrayofstringLength(), 2);
TestEq(monster.testarrayofstring(0),"test1");
TestEq(monster.testarrayofstring(1),"test2");
}
static <T> void TestEq(T a, T b) {
if (!a.equals(b)) {
System.out.println("" + a.getClass().getName() + " " + b.getClass().getName());
System.out.println("FlatBuffers test FAILED: \'" + a + "\' != \'" + b + "\'");
assert false;
System.exit(1);
}
}
}
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