/**  Copyright (c) 2001 Sun Microsystems, Inc.  All rights*  reserved.**  Redistribution and use in source and binary forms, with or without*  modification, are permitted provided that the following conditions*  are met:**  1. Redistributions of source code must retain the above copyright*  notice, this list of conditions and the following disclaimer.**  2. Redistributions in binary form must reproduce the above copyright*  notice, this list of conditions and the following disclaimer in*  the documentation and/or other materials provided with the*  distribution.**  3. The end-user documentation included with the redistribution,*  if any, must include the following acknowledgment:*  "This product includes software developed by the*  Sun Microsystems, Inc. for Project JXTA."*  Alternately, this acknowledgment may appear in the software itself,*  if and wherever such third-party acknowledgments normally appear.**  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"*  must not be used to endorse or promote products derived from this*  software without prior written permission. For written*  permission, please contact Project JXTA at http://www.jxta.org.**  5. Products derived from this software may not be called "JXTA",*  nor may "JXTA" appear in their name, without prior written*  permission of Sun.**  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED*  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES*  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE*  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR*  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF*  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF*  SUCH DAMAGE.*  ====================================================================**  This software consists of voluntary contributions made by many*  individuals on behalf of Project JXTA.  For more*  information on Project JXTA, please see*  <http://www.jxta.org/>.**  This license is based on the BSD license adopted by the Apache Foundation.**  $Id: BaseExec.java,v 1.1 2004/12/19 23:55:38 gonzo Exp $*/package net.jxta.myjxta.util.exec;import java.net.URL;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.IOException;/** * Base class for all execs on all platforms. * * @version $Id: BaseExec.java,v 1.1 2004/12/19 23:55:38 gonzo Exp $ * * @author james todd [gonzo at jxta dot org] * @author mike mcangus [mcangus at jxta dot org] */class BaseExec    implements Exec {    /**     * Returns the OS-specific process that will execute the specified command.     *      * @param command The command string to be executed.     * @return the OS-specific process that will execute the specified command.     */    public Process exec(String command) {        Process p = null;        try {            p = Runtime.getRuntime().exec(command);        } catch (IOException ignored) {            // ignored exception        }        return p;    }    /**     * Returns the OS-specific result code for the specified command.     *      * @param command The command string to be executed.     * @return the OS-specific result code for the specified command.     */    public int execValue(String command) {        Process p = exec(command);        if (p != null) {            try {                p.waitFor();            } catch (InterruptedException ignored) {                // ignored exception            }        }        return p != null ? p.exitValue() : -1;    }    /**     * Returns a BufferedReader which gives access to the output of the specified command.     *      * @param command The command string to be executed.     * @return a BufferedReader which gives access to the output of the specified command.     */    public BufferedReader execReader(String command) {        Process p = exec(command);        if (p != null) {            p.exitValue();        }        return (p != null ?                new BufferedReader(new InputStreamReader(p.getInputStream())) :                null);    }    /**     * Returns the OS-specific oricess required to access the specified URL.     *      * @param doc The URL to be accessed..     * @return the OS-specific process required to access the specified URL.     */    public Process execDocument(URL doc) {        return exec(doc.toString());    }}