InputHandler.java

/*******************************************************************************
 * Copyright (c) 2010, 2011 SAP AG
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Lazar Kirchev, SAP AG - initial API and implementation  
 *******************************************************************************/

package org.eclipse.equinox.console.common;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * This class represents a generic handler of content, read from some input stream. It reads from the
 * stream, and passes what is read to a processor, which performs some actions on the content,
 * eventually writing to an output stream. This handler should be customized with a concrete content processor.
 */
public abstract class InputHandler extends Thread {

    protected Scanner inputScanner;
    protected OutputStream out;
    protected ConsoleInputStream in;
    protected InputStream input;
    protected byte[] buffer;
    protected static final int MAX_SIZE = 2048;

    public InputHandler(InputStream input, ConsoleInputStream in, OutputStream out) {
        this.input = input;
        this.in = in;
        this.out = out;
        buffer = new byte[MAX_SIZE];
    }

    public void run() {
        int count;
        try {
            while ((count = input.read(buffer)) > -1) {
                for (int i = 0; i < count; i++) {
                    inputScanner.scan(buffer[i]);
                }
            }
        } catch (IOException e) {
            // Printing stack trace is not needed since the streams are closed immediately
            // do nothing
        } finally {
        	try {
                in.close();
            } catch (IOException e1) {
                // do nothing
            }
            try {
                out.close();
            } catch (IOException e1) {
                // do nothing
            }
        }
    }
    
    public Scanner getScanner() {
    	return inputScanner;
    }

}