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Implementation of the Modbus protocol in Java language
package com.invertor.modbus.data;
import com.invertor.modbus.exception.IllegalDataValueException;
/*
* Copyright (C) 2016 "Invertor" Factory", JSC
* [http://www.sbp-invertor.ru]
*
* This file is part of JLibModbus.
*
* 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.
*
* Authors: Vladislav Y. Kochedykov, software engineer.
* email: [email protected]
*/
abstract public class FifoQueue {
final private int capacity;
public FifoQueue(int capacity) {
this.capacity = capacity;
}
public abstract int size();
abstract protected int[] peekImpl();
abstract protected void addImpl(int register);
abstract protected void pollImpl();
synchronized final public void poll() {
if (size() != 0)
pollImpl();
}
synchronized final public void add(int register) {
if (size() < capacity)
addImpl(register);
}
synchronized final public int[] get() throws IllegalDataValueException {
if (size() > 31 || size() == 0) {
throw new IllegalDataValueException();
}
return peekImpl();
}
}