package com.intelligt.modbus.jlibmodbus.data;
|
|
import com.intelligt.modbus.jlibmodbus.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: vladislav.kochedykov@gmail.com
|
*/
|
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();
|
}
|
}
|
