?? baseexec.java
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/** 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()); }}
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