importfile.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 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: importfile.java,v 1.12 2006/06/02 18:31:58 bondolo Exp $
 */


package net.jxta.impl.shell.bin.importfile;

import net.jxta.impl.shell.*;

import java.io.*;
import java.util.*;

import net.jxta.pipe.*;
import net.jxta.peergroup.*;
import net.jxta.peer.*;
import net.jxta.document.*;
import net.jxta.id.*;

import net.jxta.document.BinaryDocument;

import net.jxta.impl.shell.GetOpt;

/**
 * 'importfile' Shell command to load a new file object into a
 * Structured document content environment variable
 *
 */
public class importfile extends ShellApp {
    
    /**
     *  {@inheritDoc}
     **/
    public int startApp(String[] args) {
        String filename = null;
        String envName = null;
        
        int i = 0;
        
        ShellEnv env = getEnv();
        
        GetOpt options = new GetOpt( args, 0, "f:" );
        
        while( true ) {
            int option;
            try {
                option = options.getNextOption();
            } catch( IllegalArgumentException badopt ) {
                consoleMessage( "Illegal argument :" + badopt );
                return syntaxError();
            }
                        
            if( -1 == option ) {
                break;
            }
            
            switch( option ) {
                // support the "legacy" varient of this command.
                case 'f' :
                    filename = options.getOptionArg();
                    break;
                    
                default :
                    consoleMessage( "Unrecognized option" );
                    return syntaxError();
            }
        }
        
        if( null == filename ) {
            filename = options.getNextParameter();
            
            if( null == filename ) {
                consoleMessage( "Missing <filename> parameter" );
                return syntaxError();
            }
        }
        
        if( null == envName ) {
            envName = options.getNextParameter();
        }
        
        if ( null != options.getNextParameter() ) {
            consoleMessage( "Unsupported parameter" );
            return syntaxError();
        }
        
        if( null == envName ) {
            envName = getReturnVariable();
        }
        
        try {
            File file = new File(filename);
            
            long length = file.length();
            
            InputStream ip = new FileInputStream(file);
            
            if( length > 32 ) {
                try {
                    StructuredDocument doc = StructuredDocumentFactory.newStructuredDocument(
                    MimeMediaType.XMLUTF8, ip);
                    
                    ShellObject old = env.add( envName, new ShellObject("XMLDocument", doc) );
                    
                    return ShellApp.appNoError;
                } finally {
                    ip.close();
                }
            }
            
            try {
                byte[] buffer = new byte [(int) length];
                
                DataInput dis = new DataInputStream( ip );
                dis.readFully( buffer );
                
                Document doc = new BinaryDocument( buffer );
                
                ShellObject old = env.add( envName, new ShellObject("Document", doc) );
                
                return ShellApp.appNoError;
            } finally {
                ip.close();
            }
        } catch( IOException failure ) {
            printStackTrace( " ", failure );
            return ShellApp.appMiscError;
        }
    }
    
    private int syntaxError() {
        consoleMessage("usage : importfile <filename>");
        return ShellApp.appParamError;
    }
    
    /**
     *  {@inheritDoc}
     **/
    public String getDescription() {
        return "Import an external file";
    }
    
    /**
     *  {@inheritDoc}
     **/
    public void help() {
        println("NAME");
        println("     importfile - " + getDescription() );
        println(" ");
        println("SYNOPSIS");
        println("     importfile <filename>");
        println(" ");
        println("DESCRIPTION");
        println("'importfile' imports an external file into a Document");
        println("object stored in a Shell environment variable. The name of the");
        println("environment variable is specified as an argument.");
        println("'importfile' is the reverse operation of 'exportfile'");
        println(" ");
        println("EXAMPLE");
        println("    JXTA> myfile = importfile /home/tra/myfile ");
        println("    JXTA> cat myfile");
        println(" ");
        println("This command imports the file '/home/tra/myfile' into the");
        println("'myfile' environment variable");
        println(" ");
        println("SEE ALSO");
        println("    exportfile mkadv");
    }
}