/*
* 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 SUN MICROSYSTEMS 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: get.java,v 1.17 2007/02/09 23:12:45 hamada Exp $
*/
package net.jxta.impl.shell.bin.get;
import net.jxta.document.BinaryDocument;
import net.jxta.document.StructuredDocument;
import net.jxta.document.StructuredDocumentFactory;
import net.jxta.endpoint.Message;
import net.jxta.endpoint.MessageElement;
import net.jxta.impl.shell.ShellApp;
import net.jxta.impl.shell.ShellEnv;
import net.jxta.impl.shell.ShellObject;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.NoSuchElementException;
/**
* mkmsg: create a Message
*/
public class get extends ShellApp {
ShellEnv env;
public get() {
}
@Override
public void stopApp() {
}
private int syntaxError() {
println("usage: get <msg> <name>");
return ShellApp.appParamError;
}
public int startApp(String[] args) {
if ((args == null) || (args.length != 2)) {
return syntaxError();
}
env = getEnv();
ShellObject obj = env.get(args[0]);
if (obj == null) {
println("get: cannot access " + args[0]);
return ShellApp.appMiscError;
}
Message msg;
try {
msg = (Message) obj.getObject();
} catch (Exception e) {
// This is not a Message
println("get: " + args[0] + " is not a Message");
return ShellApp.appMiscError;
}
if (msg == null) {
println("get: " + args[0] + " is empty");
return ShellApp.appMiscError;
}
String name = args[1];
InputStream ip;
StructuredDocument doc;
try {
MessageElement elem = msg.getMessageElement(name);
msg.removeMessageElement(elem);
ip = elem.getStream();
try {
doc = StructuredDocumentFactory.newStructuredDocument(elem.getMimeType(), ip);
env.add(getReturnVariable(),
new ShellObject<StructuredDocument>("StructuredDocument", doc));
return ShellApp.appNoError;
} catch (NoSuchElementException notadoc) {
ip = elem.getStream();
ByteArrayOutputStream op = new ByteArrayOutputStream();
int aChar;
do {
aChar = ip.read();
if (-1 != aChar)
op.write(aChar);
} while (aChar >= 0);
BinaryDocument bdoc = new BinaryDocument(op.toByteArray());
env.add(getReturnVariable(), new ShellObject<BinaryDocument>("BinaryDocument", bdoc));
return ShellApp.appNoError;
}
} catch (Exception e) {
println("get: failed with an exception ");
StringWriter theStackTrace = new StringWriter();
e.printStackTrace(new PrintWriter(theStackTrace));
print(theStackTrace.toString());
return ShellApp.appMiscError;
}
}
@Override
public String getDescription() {
return "Get data from a pipe message";
}
@Override
public void help() {
println("NAME");
println(" get - get data from a pipe message");
println(" ");
println("SYNOPSIS");
println(" get <msg> <tag>");
println(" ");
println("DESCRIPTION");
println(" ");
println("'get' retrieve the tag body of a message. JXTA messages are");
println("composed a set of tag body, each identified with an unique tag name");
println("A message tag name is supplied to command to specify which tag body");
println("to extract.");
println(" ");
println("EXAMPLE");
println(" ");
println(" JXTA> pipeadv = newpipe -n mypipe");
println(" JXTA> inpipe = mkpipe -i pipeadv");
println(" JXTA> msg = recv inpipe");
println(" JXTA> data = get msg mytag");
println(" ");
println("This example creates a pipe advertisement 'pipeadv',");
println("creates an input pipe 'inpipe', and receives a message 'msg'.");
println("The tag body of the message associated with the tag 'mytag' is");
println("retreived from the message via the 'get' command.");
println(" ");
println("SEE ALSO");
println(" mkmsg put send recv mkadv newpipe mkpipe");
}
}