// Wanda POS - Africa's Gift to the World
// Copyright (c) 2014-2015 IT-Kamer & previous Unicenta POS and Openbravo POS works
// www.erp-university-africa.com
//
// This file is part of Wanda POS
//
// Wanda POS is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Wanda POS is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Wanda POS. If not, see <http://www.gnu.org/licenses/>.
package com.openbravo.pos.printer.escpos;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
*
* @author JG uniCenta
*/
public abstract class PrinterWritter {
private boolean initialized = false;
private ExecutorService exec;
/**
*
*/
public PrinterWritter() {
exec = Executors.newSingleThreadExecutor();
}
/**
*
* @param data
*/
protected abstract void internalWrite(byte[] data);
/**
*
*/
protected abstract void internalFlush();
/**
*
*/
protected abstract void internalClose();
/**
*
* @param data
*/
public void init(final byte[] data) {
if (!initialized) {
write(data);
initialized = true;
}
}
/**
*
* @param sValue
*/
public void write(String sValue) {
write(sValue.getBytes());
}
/**
*
* @param data
*/
public void write(final byte[] data) {
exec.execute(new Runnable() {
@Override
public void run() {
internalWrite(data);
}
});
}
/**
*
*/
public void flush() {
exec.execute(new Runnable() {
@Override
public void run() {
internalFlush();
}
});
}
/**
*
*/
public void close() {
exec.execute(new Runnable() {
@Override
public void run() {
internalClose();
}
});
exec.shutdown();
}
}