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HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

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/*
 * Copyright 2018 dc-square and the HiveMQ MQTT Client Project
 *
 * 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 com.hivemq.client.internal.util;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author Silvio Giebl
 */
public class ByteArray {

    protected final @NotNull byte[] array;

    public ByteArray(final @NotNull byte[] array) {
        this.array = array;
    }

    public int length() {
        return getEnd() - getStart();
    }

    @Override
    public boolean equals(final @Nullable Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof ByteArray)) {
            return false;
        }
        final ByteArray that = (ByteArray) o;
        return ByteArrayUtil.equals(array, getStart(), getEnd(), that.array, that.getStart(), that.getEnd());
    }

    @Override
    public int hashCode() {
        return ByteArrayUtil.hashCode(array, getStart(), getEnd());
    }

    protected int getStart() {
        return 0;
    }

    protected int getEnd() {
        return array.length;
    }

    public static class Range extends ByteArray {

        protected int start;
        protected int end;

        public Range(final @NotNull byte[] array, final int start, final int end) {
            super(array);
            this.start = start;
            this.end = end;
        }

        @Override
        protected int getStart() {
            return start;
        }

        @Override
        protected int getEnd() {
            return end;
        }
    }
}