genericdevice.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

/*
 * $Id: GenericDevice.java 5462 2005-08-05 18:35:48Z jonesde $
 *
 * Copyright (c) 2004 The Open For Business Project - www.ofbiz.org
 *
 * 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 org.ofbiz.pos.device;

import jpos.BaseControl;
import jpos.JposException;

import org.ofbiz.base.util.Debug;
import org.ofbiz.pos.event.MenuEvents;
import org.ofbiz.pos.screen.PosScreen;

/**
 * 
 * @author     <a href="mailto:[e-mail]">Andy Zeneski</a>
 * @version    $Rev: 5462 $
 * @since      3.2
 */
public abstract class GenericDevice implements JposDevice {

    public static final String module = GenericDevice.class.getName();

    protected BaseControl control = null;
    protected String deviceName = null;
    protected int timeout = -1;

    public GenericDevice(String deviceName, int timeout) {
        this.deviceName = deviceName;
        this.timeout = timeout;
    }

    public void open() throws JposException {
        if (deviceName != null && control != null) {
            if (!"[NOT IMPLEMENTED]".equals(deviceName) && !"[DISABLED]".equals(deviceName)) {
                control.open(deviceName);
                control.claim(timeout);
                this.enable(true);
                this.initialize();
            }
        } else {
            Debug.logWarning("No device named [" + deviceName + "] available", module);
        }
    }

    public void close() throws JposException {
        control.release();
        control.close();
        control = null;
    }

    public boolean isEnabled() {
        try {
            return control.getDeviceEnabled();
        } catch (JposException e) {
            Debug.logError(e, module);
            return false;
        }
    }

    public void enable(boolean enable) {
        try {
            control.setDeviceEnabled(enable);
        } catch (JposException e) {
            Debug.logError(e, module);
        }
    }

    protected void callEnter() {
        // first invoke the enter event
        MenuEvents.triggerEnter(PosScreen.currentScreen, null);
        MenuEvents.triggerClear(PosScreen.currentScreen);
    }
    
    protected abstract void initialize() throws JposException;
}