com.github.xingshuangs.iot.protocol.s7.model.HeaderBuilder Maven / Gradle / Ivy
/*
* MIT License
*
* Copyright (c) 2021-2099 Oscura (xingshuang)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.github.xingshuangs.iot.protocol.s7.model;
import com.github.xingshuangs.iot.exceptions.S7CommException;
import com.github.xingshuangs.iot.protocol.s7.enums.EMessageType;
/**
* Header构建器
*
* @author xingshuang
*/
public class HeaderBuilder {
private HeaderBuilder() {
// NOOP
}
/**
* 字节数组数据解析
*
* @param data 字节数组数据
* @return Header
*/
public static Header fromBytes(final byte[] data) {
EMessageType messageType = EMessageType.from(data[1]);
switch (messageType) {
case JOB:
return Header.fromBytes(data);
case ACK:
case ACK_DATA:
return AckHeader.fromBytes(data);
case USER_DATA:
return null;
default:
throw new S7CommException("Header message type not recognized");
}
}
}