/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.kafka.common.protocol.types;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;
import java.nio.ByteBuffer;
import java.util.Arrays;
import org.apache.kafka.common.protocol.types.ArrayOf;
import org.apache.kafka.common.protocol.types.Field;
import org.apache.kafka.common.protocol.types.Schema;
import org.apache.kafka.common.protocol.types.SchemaException;
import org.apache.kafka.common.protocol.types.Struct;
import org.apache.kafka.common.protocol.types.Type;
import org.junit.Before;
import org.junit.Test;
public class ProtocolSerializationTest {
private Schema schema;
private Struct struct;
@Before
public void setup() {
this.schema = new Schema(new Field("int8", Type.INT8),
new Field("int16", Type.INT16),
new Field("int32", Type.INT32),
new Field("int64", Type.INT64),
new Field("string", Type.STRING),
new Field("bytes", Type.BYTES),
new Field("array", new ArrayOf(Type.INT32)),
new Field("struct", new Schema(new Field("field", Type.INT32))));
this.struct = new Struct(this.schema).set("int8", (byte) 1)
.set("int16", (short) 1)
.set("int32", (int) 1)
.set("int64", (long) 1)
.set("string", "1")
.set("bytes", "1".getBytes())
.set("array", new Object[] { 1 });
this.struct.set("struct", this.struct.instance("struct").set("field", new Object[] { 1, 2, 3 }));
}
@Test
public void testSimple() {
check(Type.INT8, (byte) -111);
check(Type.INT16, (short) -11111);
check(Type.INT32, -11111111);
check(Type.INT64, -11111111111L);
check(Type.STRING, "");
check(Type.STRING, "hello");
check(Type.STRING, "A\u00ea\u00f1\u00fcC");
check(Type.BYTES, ByteBuffer.allocate(0));
check(Type.BYTES, ByteBuffer.wrap("abcd".getBytes()));
check(new ArrayOf(Type.INT32), new Object[] { 1, 2, 3, 4 });
check(new ArrayOf(Type.STRING), new Object[] {});
check(new ArrayOf(Type.STRING), new Object[] { "hello", "there", "beautiful" });
}
@Test
public void testNulls() {
for (Field f : this.schema.fields()) {
Object o = this.struct.get(f);
try {
this.struct.set(f, null);
this.struct.validate();
fail("Should not allow serialization of null value.");
} catch (SchemaException e) {
// this is good
this.struct.set(f, o);
}
}
}
@Test
public void testDefault() {
Schema schema = new Schema(new Field("field", Type.INT32, "doc", 42));
Struct struct = new Struct(schema);
assertEquals("Should get the default value", 42, struct.get("field"));
struct.validate(); // should be valid even with missing value
}
private Object roundtrip(Type type, Object obj) {
ByteBuffer buffer = ByteBuffer.allocate(type.sizeOf(obj));
type.write(buffer, obj);
assertFalse("The buffer should now be full.", buffer.hasRemaining());
buffer.rewind();
Object read = type.read(buffer);
assertFalse("All bytes should have been read.", buffer.hasRemaining());
return read;
}
private void check(Type type, Object obj) {
Object result = roundtrip(type, obj);
if (obj instanceof Object[]) {
obj = Arrays.asList((Object[]) obj);
result = Arrays.asList((Object[]) result);
}
assertEquals("The object read back should be the same as what was written.", obj, result);
}
}