/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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 * its licensees as provided above.  However, if you add GPL Version 2 code
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/*
 * $Header: /cvs/glassfish/admin/mbeanapi-impl/src/java/com/sun/enterprise/management/deploy/DownloadFileSource.java,v 1.4 2007/05/05 05:23:28 tcfujii Exp $
 * $Revision: 1.4 $
 * $Date: 2007/05/05 05:23:28 $
 */
package com.sun.enterprise.management.deploy;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

/**
	This class is responsible for generating a File for downloading, given
	a moduleID and filename within that module.  The file may be pre-existing,
	in which case isTempFile() should return false, or it may be a generated
	temporary file, in which case isTempFile() should return true.  If isTempFile()
	returns true, the caller will delete the file at some point.
 */
final class DownloadFileSource 
{
	private final String	mModuleID;
	private final String	mFilename;
	
		public
	DownloadFileSource(
		final String	moduleID,
		final String	filename )
		throws IOException
	{
		mModuleID	= moduleID;
		mFilename	= filename;
	}
	
		public File
	getDownloadFile()
		throws IOException
	{
		return( createDownloadFile( mModuleID, mFilename ) );
	}
	
		public boolean
	isTempFile()
	{
		return( true );
	}
	
	/**
		This implementation is for testing; the real one needs to find or produce
		a file corresponding to the requested module and filename.
	 */
		private File
	createDownloadFile( 
		final String	moduleID,
		final String	filename)
		throws IOException
	{
		final String	name	= "./" + moduleID + "_" + filename + System.currentTimeMillis();
		
		final File theFile	= new File( name );
		theFile.createNewFile();
		
		final FileOutputStream	out	= new FileOutputStream( theFile );
		
		final byte[]	temp	= new byte[ 1024 * 1024 ];
		
		long	remaining	= temp.length * 10;
		while ( remaining != 0 )
		{
			out.write( temp );
			assert( remaining >= temp.length );
			remaining	-= temp.length;
		}
		
		out.close();
		
		return( theFile );
	}
}