/* *************************************************************************
 
 IT Mill Toolkit 

 Development of Browser User Interfaces Made Easy

 Copyright (C) 2000-2006 IT Mill Ltd
 
 *************************************************************************

 This product is distributed under commercial license that can be found
 from the product package on license.pdf. Use of this product might 
 require purchasing a commercial license from IT Mill Ltd. For guidelines 
 on usage, see licensing-guidelines.html

 *************************************************************************
 
 For more information, contact:
 
 IT Mill Ltd                           phone: +358 2 4802 7180
 Ruukinkatu 2-4                        fax:   +358 2 4802 7181
 20540, Turku                          email:  info@itmill.com
 Finland                               company www: www.itmill.com
 
 Primary source for information and releases: www.itmill.com

 ********************************************************************** */

package com.itmill.toolkit.terminal;

import com.itmill.toolkit.Application;

/**
 * This interface must be implemented by classes wishing to provide Application
 * resources.
 * <p>
 * <code>ApplicationResource</code> are a set of named resources (pictures,
 * sounds, etc) associated with some specific application. Having named
 * application resources provides a convenient method for having inter-theme
 * common resources for an application.
 * </p>
 * 
 * @author IT Mill Ltd.
 * @version
 * @VERSION@
 * @since 3.0
 */
public interface ApplicationResource extends Resource {

    /**
     * Default cache time.
     */
    public static final long DEFAULT_CACHETIME = 1000 * 60 * 60 * 24;

    /**
     * Gets resource as stream.
     */
    public DownloadStream getStream();

    /**
     * Gets the application of the resource.
     */
    public Application getApplication();

    /**
     * Gets the virtual filename for this resource.
     * 
     * @return the file name associated to this resource.
     */
    public String getFilename();

    /**
     * Gets the length of cache expiration time.
     * 
     * <p>
     * This gives the adapter the possibility cache streams sent to the client.
     * The caching may be made in adapter or at the client if the client
     * supports caching. Default is <code>DEFAULT_CACHETIME</code>.
     * </p>
     * 
     * @return Cache time in milliseconds
     */
    public long getCacheTime();

    /**
     * Gets the size of the download buffer used for this resource.
     * 
     * <p>
     * If the buffer size is 0, the buffer size is decided by the terminal
     * adapter. The default value is 0.
     * </p>
     * 
     * @return int the size of the buffer in bytes.
     */
    public int getBufferSize();

}