package com.intelligt.modbus.jlibmodbus.msg.base;
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import com.intelligt.modbus.jlibmodbus.data.DataHolder;
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import com.intelligt.modbus.jlibmodbus.exception.ModbusNumberException;
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import com.intelligt.modbus.jlibmodbus.msg.ModbusMessageFactory;
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import com.intelligt.modbus.jlibmodbus.msg.ModbusResponseFactory;
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import com.intelligt.modbus.jlibmodbus.net.stream.base.ModbusOutputStream;
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import java.io.IOException;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.InvocationTargetException;
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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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@SuppressWarnings("unchecked")
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abstract public class ModbusRequest extends ModbusMessage implements ModbusMessageFactory {
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final private ModbusResponse response;
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public ModbusRequest() {
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ModbusResponse response = null;
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try {
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final Constructor<ModbusResponse>[] constructors = (Constructor<ModbusResponse>[]) getResponseClass().getConstructors();
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for (Constructor<ModbusResponse> c : constructors) {
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if (c.getParameterTypes().length == 0) {
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response = c.newInstance();
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break;
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}
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}
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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} catch (InstantiationException e) {
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e.printStackTrace();
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} catch (InvocationTargetException e) {
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e.printStackTrace();
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} finally {
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this.response = response;
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}
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}
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@Override
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public void setServerAddress(int serverAddress) throws ModbusNumberException {
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super.setServerAddress(serverAddress);
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getResponse().setServerAddress(serverAddress);
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}
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public ModbusResponse getResponse() {
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return response;
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}
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protected abstract Class getResponseClass();
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abstract public void writeRequest(ModbusOutputStream fifo) throws IOException;
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@Override
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final public void writePDU(ModbusOutputStream fifo) throws IOException {
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fifo.write(getFunction());
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writeRequest(fifo);
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}
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@Override
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final protected int pduSize() {
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return 1 + requestSize();
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}
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abstract public int requestSize();
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abstract public ModbusResponse process(DataHolder dataHolder) throws ModbusNumberException;
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abstract protected boolean validateResponseImpl(ModbusResponse response);
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public void validateResponse(ModbusResponse msg) throws ModbusNumberException {
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if (getProtocolId() != msg.getProtocolId())
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throw new ModbusNumberException("Collision: does not matches the protocol id");
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if (getTransactionId() != msg.getTransactionId())
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throw new ModbusNumberException("Collision: does not matches the transaction id");
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if (getServerAddress() != msg.getServerAddress())
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throw new ModbusNumberException("Does not matches the slave address", msg.getServerAddress());
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if (getFunction() != msg.getFunction())
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throw new ModbusNumberException("Does not matches the function code", msg.getFunction());
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if (!msg.isException()) {
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if (!validateResponseImpl(msg))
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throw new ModbusNumberException("Collision: response does not matches the request");
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}
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}
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@Override
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public ModbusMessage createMessage(int functionCode) {
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if (functionCode != getFunction()) {
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return ModbusResponseFactory.getInstance().createMessage(functionCode);
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} else {
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return getResponse();
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}
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}
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}
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