flink-core/src/test/java/org/apache/flink/testutils/serialization/types/ByteArrayType.java

/*
 * 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.flink.testutils.serialization.types;

import org.apache.flink.core.memory.DataInputView;
import org.apache.flink.core.memory.DataOutputView;

import java.io.IOException;
import java.util.Arrays;
import java.util.Random;

public class ByteArrayType implements SerializationTestType {

    private static final int MAX_LEN = 512 * 15;

    private byte[] data;

    public ByteArrayType() {
        this.data = new byte[0];
    }

    public ByteArrayType(byte[] data) {
        this.data = data;
    }

    @Override
    public ByteArrayType getRandom(Random rnd) {
        final int len = rnd.nextInt(MAX_LEN) + 1;
        final byte[] data = new byte[len];
        rnd.nextBytes(data);
        return new ByteArrayType(data);
    }

    @Override
    public int length() {
        return data.length + 4;
    }

    @Override
    public void write(DataOutputView out) throws IOException {
        out.writeInt(this.data.length);
        out.write(this.data);
    }

    @Override
    public void read(DataInputView in) throws IOException {
        final int len = in.readInt();
        this.data = new byte[len];
        in.readFully(this.data);
    }

    @Override
    public int hashCode() {
        return Arrays.hashCode(this.data);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof ByteArrayType) {
            ByteArrayType other = (ByteArrayType) obj;
            return Arrays.equals(this.data, other.data);
        } else {
            return false;
        }
    }
}