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Jetty example source code file (Include.java)

This example Jetty source code file (Include.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Jetty tags/keywords

bufferedreader, element, file, file, filereader, include, include, inputstreamreader, io, ioexception, ioexception, list, net, network, string, stringwriter, stringwriter

The Jetty Include.java source code

// ========================================================================
// $Id: Include.java,v 1.6 2005/08/13 00:01:23 gregwilkins Exp $
// Copyright 1996-2004 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at 
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================

package org.mortbay.html;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.net.URL;

import org.mortbay.util.IO;


/* -------------------------------------------------------------------- */
/** Include File, InputStream or Reader Element.
 * <p>This Element includes another file.
 * This class expects that the HTTP directory separator '/' will be used.
 * This will be converted to the local directory separator.
 * @see Element
 * @version $Id: Include.java,v 1.6 2005/08/13 00:01:23 gregwilkins Exp $
 * @author Greg Wilkins
*/
public class Include extends Element
{

    Reader reader=null;
    
    /* ------------------------------------------------------------ */
    /** Constructor.
     * Include file
     * @param directory Directory name
     * @param fileName file name
     * @exception IOException File not found
     */
    public Include(String directory,
                   String fileName)
         throws IOException
    {
        if (directory==null)
            directory=".";
 
        if (File.separatorChar != '/')
        {
            directory = directory.replace('/',File.separatorChar);
            fileName  = fileName .replace('/',File.separatorChar);
        }

        includeFile(new File(directory,fileName));
    }
    
    /* ------------------------------------------------------------ */
    /** Constructor. 
     * Include file.
     * @param fileName Filename
     * @exception IOException File not found
     */
    public Include(String fileName)
        throws IOException
    {
        if (File.separatorChar != '/')
            fileName  = fileName .replace('/',File.separatorChar);
        includeFile(new File(fileName));
    }

    /* ------------------------------------------------------------ */
    /** Constructor.
     * Include file.
     * @param file file
     * @exception IOException File not found
     */
    public Include(File file)
        throws IOException
    {
        includeFile(file);
    }

    /* ------------------------------------------------------------ */
    /** Constructor.
     * Include InputStream.
     * Byte to character transformation is done assuming the default
     * local character set.  What this means is that on EBCDIC systems
     * the included file is assumed to be in EBCDIC.
     * @param in stream
     * @exception IOException
     */
    public Include(InputStream in)
        throws IOException
    {
        if (in!=null)
            reader=new InputStreamReader(in);
    }
    
    /* ------------------------------------------------------------ */
    /** Constructor.
     * Include contents of a URL.
     * Byte to character transformation is done assuming the default
     * local character set.  What this means is that on EBCDIC systems
     * the included file is assumed to be in EBCDIC.
     * @param url the URL to read from.
     * @exception IOException
     */
    public Include(URL url)
        throws IOException
    {
        if (url!=null)
            reader=new InputStreamReader(url.openStream());
    }
    
    /* ------------------------------------------------------------ */
    /** Constructor.
     * Include Reader.
     * @param in reader
     * @exception IOException
     */
    public Include(Reader in)
        throws IOException
    {
        reader=in;
    }
    
    /* ------------------------------------------------------------ */
    private void includeFile(File file)
        throws IOException
    {
        if (!file.exists())
            throw new FileNotFoundException(file.toString());
        
        if (file.isDirectory())
        {
            List list = new List(List.Unordered);       
            String[] ls = file.list();
            for (int i=0 ; i< ls.length ; i++)
                list.add(ls[i]);
            StringWriter sw = new StringWriter();
            list.write(sw);
            reader = new StringReader(sw.toString());
        }
        else
        {
            reader = new BufferedReader(new FileReader(file));
        }
    }
    

    /* ---------------------------------------------------------------- */
    public void write(Writer out)
         throws IOException
    {
        if (reader==null)
            return;
        
        try{
            IO.copy(reader,out);
        }
        finally
        {
            reader.close();
            reader=null;
        }
    }
}









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