package com.intelligt.modbus.jlibmodbus.msg.response;
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import com.intelligt.modbus.jlibmodbus.Modbus;
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import com.intelligt.modbus.jlibmodbus.exception.ModbusNumberException;
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import com.intelligt.modbus.jlibmodbus.msg.base.ModbusResponse;
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import com.intelligt.modbus.jlibmodbus.net.stream.base.ModbusInputStream;
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import com.intelligt.modbus.jlibmodbus.net.stream.base.ModbusOutputStream;
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import com.intelligt.modbus.jlibmodbus.utils.DataUtils;
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import com.intelligt.modbus.jlibmodbus.utils.ModbusFunctionCode;
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import java.io.IOException;
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/*
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* Copyright (C) 2016 "Invertor" Factory", JSC
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* [http://www.sbp-invertor.ru]
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*
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* This file is part of JLibModbus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Authors: Vladislav Y. Kochedykov, software engineer.
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* email: vladislav.kochedykov@gmail.com
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*/
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public class ReadFifoQueueResponse extends ModbusResponse {
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private byte[] bytes;
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public ReadFifoQueueResponse() {
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super();
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}
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private void checkFifoCount(int fifoCount) throws ModbusNumberException {
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if (fifoCount > Modbus.MAX_FIFO_COUNT)
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throw new ModbusNumberException("Fifo count greater than max fifo count", fifoCount);
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}
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@Override
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protected void readResponse(ModbusInputStream fifo) throws IOException, ModbusNumberException {
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int byteCount = fifo.readShortBE();
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int fifoCount = fifo.readShortBE();
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if ((fifoCount * 2) != byteCount)
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throw new ModbusNumberException("Fifo count not matches bytes*2", fifoCount);
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checkFifoCount(fifoCount);
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bytes = new byte[byteCount];
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if (fifo.read(bytes) != byteCount) {
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throw new IOException("Can't read fifo value register");
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}
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}
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@Override
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protected void writeResponse(ModbusOutputStream fifo) throws IOException {
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int[] r = getFifoValueRegister();
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fifo.writeShortBE(r.length * 2);
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fifo.writeShortBE(r.length);
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fifo.write(DataUtils.toByteArray(r));
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}
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@Override
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protected int responseSize() {
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return 2 + 2 + (bytes != null ? bytes.length : 0);
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}
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@Override
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public int getFunction() {
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return ModbusFunctionCode.READ_FIFO_QUEUE.toInt();
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}
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public int[] getFifoValueRegister() {
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return DataUtils.BeToIntArray(bytes);
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}
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public void setFifoValueRegister(int[] fifoValueRegister) throws ModbusNumberException {
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checkFifoCount(fifoValueRegister.length);
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this.bytes = DataUtils.toByteArray(fifoValueRegister);
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}
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}
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