package com.intelligt.modbus.jlibmodbus.msg;
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import com.intelligt.modbus.jlibmodbus.msg.base.ModbusMessage;
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import com.intelligt.modbus.jlibmodbus.msg.base.ModbusRequest;
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import com.intelligt.modbus.jlibmodbus.msg.request.*;
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import com.intelligt.modbus.jlibmodbus.utils.ModbusFunctionCode;
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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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final public class ModbusRequestFactory implements ModbusMessageFactory {
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private ModbusRequestFactory() {
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}
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static public ModbusRequestFactory getInstance() {
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return SingletonHolder.instance;
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}
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/**
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* This method creates a #ModbusRequest instance from #functionCode
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*
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* @param functionCode a number representing a modbus function
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* @return an instance of a specific ModbusRequest
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* @see ModbusRequest
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* @see ModbusMessageFactory
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* @see ModbusResponseFactory
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*/
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@Override
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public ModbusMessage createMessage(int functionCode) {
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ModbusMessage msg;
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switch (ModbusFunctionCode.get(functionCode)) {
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case READ_COILS:
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msg = new ReadCoilsRequest();
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break;
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case READ_DISCRETE_INPUTS:
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msg = new ReadDiscreteInputsRequest();
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break;
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case READ_HOLDING_REGISTERS:
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msg = new ReadHoldingRegistersRequest();
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break;
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case READ_INPUT_REGISTERS:
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msg = new ReadInputRegistersRequest();
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break;
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case WRITE_SINGLE_COIL:
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msg = new WriteSingleCoilRequest();
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break;
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case WRITE_SINGLE_REGISTER:
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msg = new WriteSingleRegisterRequest();
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break;
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case WRITE_MULTIPLE_COILS:
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msg = new WriteMultipleCoilsRequest();
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break;
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case WRITE_MULTIPLE_REGISTERS:
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msg = new WriteMultipleRegistersRequest();
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break;
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case MASK_WRITE_REGISTER:
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msg = new MaskWriteRegisterRequest();
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break;
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case READ_WRITE_MULTIPLE_REGISTERS:
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msg = new ReadWriteMultipleRegistersRequest();
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break;
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case READ_FIFO_QUEUE:
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msg = new ReadFifoQueueRequest();
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break;
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case READ_FILE_RECORD:
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msg = new ReadFileRecordRequest();
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break;
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case WRITE_FILE_RECORD:
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msg = new WriteFileRecordRequest();
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break;
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case READ_EXCEPTION_STATUS:
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msg = new ReadExceptionStatusRequest();
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break;
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case REPORT_SLAVE_ID:
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msg = new ReportSlaveIdRequest();
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break;
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case GET_COMM_EVENT_COUNTER:
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msg = new GetCommEventCounterRequest();
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break;
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case GET_COMM_EVENT_LOG:
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msg = new GetCommEventLogRequest();
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break;
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case DIAGNOSTICS:
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msg = new DiagnosticsRequest();
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break;
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case ENCAPSULATED_INTERFACE_TRANSPORT:
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msg = new EncapsulatedInterfaceTransportRequest();
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break;
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default:
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msg = new IllegalFunctionRequest(functionCode);
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}
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return msg;
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}
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static private class SingletonHolder {
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final static private ModbusRequestFactory instance = new ModbusRequestFactory();
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}
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}
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