http://xmlgraphics.apache.org/batik/batik-awt-util/: Batik AWT utilities (Apache Software Foundation) 
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package org.apache.batik.ext.awt.image.spi;

import java.util.List;


The base interface for all image tag registry entries.  To be useful you
probably need to implement on of the flavors of registry entries (such as
StreamRegistryEntry or URLRegistryEntry).

Version:$Id: RegistryEntry.java 1733416 2016-03-03 07:07:13Z gadams $
/**
 * The base interface for all image tag registry entries.  To be useful you
 * probably need to implement on of the flavors of registry entries (such as
 * StreamRegistryEntry or URLRegistryEntry).
 *
 * @version $Id: RegistryEntry.java 1733416 2016-03-03 07:07:13Z gadams $
 */
public interface RegistryEntry {

    
Return a List of the common extensions for this file format. The first
entry in the list may be used as the default extension for writing files
in this format (when we add support for writing that is).  This may also
be used to build a selection expression for finding files of this type.

/**
     * Return a List of the common extensions for this file format. The first
     * entry in the list may be used as the default extension for writing files
     * in this format (when we add support for writing that is).  This may also
     * be used to build a selection expression for finding files of this type.
     */
    List getStandardExtensions();

    
Return a List of mime types for this file format.  The first entry in the
list may be used as the default mime type.  
/**
     * Return a List of mime types for this file format.  The first entry in the
     * list may be used as the default mime type.  */
    List getMimeTypes();

    
Returns the name of the format. For example "JPEG", "PNG", ...

/**
     * Returns the name of the format. For example "JPEG", "PNG", ...
     */
    String getFormatName();

    
Returns a search priority for this entry.  For most formats this is not
important, but in some cases it is important that some entries occure
before or after others.

/**
     * Returns a search priority for this entry.  For most formats this is not
     * important, but in some cases it is important that some entries occure
     * before or after others.
     */
    float  getPriority();
}