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Java Source | 1998-04-08 | 3.0 KB | 61 lines |
- /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- package netscape.plugin.composer;
- import java.util.*;
- import java.io.*;
-
- /** Used to create image encoders at runtime. When the composer starts up, it examins
- * each plugin file's netscape_plugin_composer.ini file to see if it defines the property
- * "netscape.plugin.composer.ImageEncoderFactory".
- * If it does, the value of that property is taken to be a classname of a class
- * derived from ImageEncoderFactory. That class is instantiated, and it's getImageEncoders method
- * is called. This method is responsible for creating and returning an enumerator of
- * ImageEncoders.
- *
- * <p>Most developers don't need to use this class -- they can simply use the
- * "netscape.plugin.composer.ImageEncoder.classes" property to name their
- * ImageEncoder classes
- * directly. However, the ImageEncoderFactory class provides additional flexability. Some
- * possible uses of a ImageEncoderFactory class include:
- * <ol><li>A wrapper for another application's image encoders. The wrapper would
- * search the other application's data base, find the other application's image encoders,
- * and synthasize ImageEncoder instances that wrapped the other application's
- * image encoders.
- * <li>A remote repository of image encoders that's searched at run time.
- * </ol>
- */
- public class ImageEncoderFactory {
- /** If you have a default constructor, it must be public, or else you class cannot be
- * instantiated by name. (And your class should be public, too.)
- */
- public ImageEncoderFactory() {}
- /** Return an Enumeration of Plugins.
- * By default, searches the properties for the property "netscape.plugin.composer.ImageEncoder.classes",
- * and creates one instance of each of the plugins names in that string.
- * @param pluginFile The plugin file that's being scanned.
- * @param properties The properties of the plugin file that's being scanned.
- * @return the ImageEncoders to add to the Composer.
- *
- */
- public Enumeration getImageEncoders(File pluginFileName, Properties properties){
- String classNames = properties.getProperty("netscape.plugin.composer.ImageEncoder.classes");
- return PluginManager.instantiateClassList(classNames);
- }
- }
-