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A Modbus TCP/UDP/Serial Master and Slave implementation
/*
* Copyright 2002-2016 jamod & j2mod development teams
*
* 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.
*/
package com.ghgande.j2mod.modbus.procimg;
import com.ghgande.j2mod.modbus.util.Observable;
/**
* Class implementing an observable register.
*
* @author Dieter Wimberger
* @author Steve O'Hara (4NG)
* @version 2.0 (March 2016)
*/
public class ObservableRegister extends Observable implements Register {
private static final String VALUE = "value";
/**
* The word holding the content of this register.
*/
protected short register;
@Override
public synchronized int getValue() {
return register & 0xFFFF;
}
@Override
public int toUnsignedShort() {
return register & 0xFFFF;
}
@Override
public short toShort() {
return register;
}
@Override
public synchronized byte[] toBytes() {
return new byte[]{(byte)(register >> 8), (byte)(register & 0xFF)};
}
@Override
public synchronized void setValue(short s) {
register = s;
notifyObservers(VALUE);
}
@Override
public synchronized void setValue(byte[] bytes) {
if (bytes.length < 2) {
throw new IllegalArgumentException();
}
else {
register = (short)(((short)(bytes[0] << 8)) | (((short)(bytes[1])) & 0xFF));
notifyObservers(VALUE);
}
}
@Override
public synchronized void setValue(int v) {
register = (short)v;
notifyObservers(VALUE);
}
}