ByteArrayEncodedMessages.java

/* Copyright 2002-2021 CS GROUP
 * Licensed to CS GROUP (CS) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * CS 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.orekit.gnss.metric.parser;

/** Encoded messages as a byte array.
 * @author Luc Maisonobe
 * @since 11.0
 */
public class ByteArrayEncodedMessages extends AbstractEncodedMessages {

    /** Byte array containing the message. */
    private final byte[] message;

    /** Index of current byte in array. */
    private int byteIndex;

    /** Simple constructor.
     * @param message byte array containing the message
     */
    public ByteArrayEncodedMessages(final byte[] message) {
        this.message = message.clone();
    }

    /** {@inheritDoc} */
    @Override
    public void start() {
        super.start();
        this.byteIndex = -1;
    }

    /** {@inheritDoc} */
    @Override
    protected int fetchByte() {
        if (++byteIndex >= message.length) {
            return -1;
        }
        return message[byteIndex] & 0xFF;
    }

}