65 lines
3.0 KiB
Java
65 lines
3.0 KiB
Java
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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package netscape.plugin.composer;
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import java.util.*;
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import java.io.*;
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/** Used to create image encoders at runtime. When the composer starts up, it examins
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* each plugin file's netscape_plugin_composer.ini file to see if it defines the property
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* "netscape.plugin.composer.ImageEncoderFactory".
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* If it does, the value of that property is taken to be a classname of a class
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* derived from ImageEncoderFactory. That class is instantiated, and it's getImageEncoders method
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* is called. This method is responsible for creating and returning an enumerator of
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* ImageEncoders.
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*
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* <p>Most developers don't need to use this class -- they can simply use the
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* "netscape.plugin.composer.ImageEncoder.classes" property to name their
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* ImageEncoder classes
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* directly. However, the ImageEncoderFactory class provides additional flexability. Some
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* possible uses of a ImageEncoderFactory class include:
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* <ol><li>A wrapper for another application's image encoders. The wrapper would
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* search the other application's data base, find the other application's image encoders,
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* and synthasize ImageEncoder instances that wrapped the other application's
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* image encoders.
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* <li>A remote repository of image encoders that's searched at run time.
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* </ol>
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*/
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public class ImageEncoderFactory {
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/** If you have a default constructor, it must be public, or else you class cannot be
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* instantiated by name. (And your class should be public, too.)
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*/
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public ImageEncoderFactory() {}
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/** Return an Enumeration of Plugins.
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* By default, searches the properties for the property "netscape.plugin.composer.ImageEncoder.classes",
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* and creates one instance of each of the plugins names in that string.
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* @param pluginFile The plugin file that's being scanned.
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* @param properties The properties of the plugin file that's being scanned.
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* @return the ImageEncoders to add to the Composer.
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*
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*/
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public Enumeration getImageEncoders(File pluginFileName, Properties properties){
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String classNames = properties.getProperty("netscape.plugin.composer.ImageEncoder.classes");
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return PluginManager.instantiateClassList(classNames);
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}
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}
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