/***********************************************************************************************************************
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * 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.
 **********************************************************************************************************************/

package eu.stratosphere.runtime.io.serialization.types;

import java.io.DataInput;
import java.io.DataOutput;
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(DataOutput out) throws IOException {
		out.writeInt(this.data.length);
		out.write(this.data);
	}

	@Override
	public void read(DataInput 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;
		}
	}
}