001    /* 
002        Licensed to the Apache Software Foundation (ASF) under one
003        or more contributor license agreements.  See the NOTICE file
004        distributed with this work for additional information
005        regarding copyright ownership.  The ASF licenses this file
006        to you under the Apache License, Version 2.0 (the
007        "License"); you may not use this file except in compliance
008        with the License.  You may obtain a copy of the License at
009    
010           http://www.apache.org/licenses/LICENSE-2.0
011    
012        Unless required by applicable law or agreed to in writing,
013        software distributed under the License is distributed on an
014        "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015        KIND, either express or implied.  See the License for the
016        specific language governing permissions and limitations
017        under the License.  
018     */
019    package org.apache.wiki.api.plugin;
020    
021    import java.util.Map;
022    
023    import org.apache.wiki.WikiContext;
024    import org.apache.wiki.api.exceptions.PluginException;
025    
026    
027    /**
028     *  Defines an interface for plugins.  Any instance of a wiki plugin should implement this interface.
029     */
030    public interface WikiPlugin {
031        /**
032         *  Name of the default plugin resource bundle.
033         */
034        String CORE_PLUGINS_RESOURCEBUNDLE = "plugin.PluginResources";
035    
036        /**
037         *  This is the main entry point for any plugin.  The parameters are parsed,
038         *  and a special parameter called "_body" signifies the name of the plugin
039         *  body, i.e. the part of the plugin that is not a parameter of
040         *  the form "key=value".  This has been separated using an empty
041         *  line.
042         *  <P>
043         *  Note that it is preferred that the plugin returns
044         *  XHTML-compliant HTML (i.e. close all tags, use &lt;br /&gt;
045         *  instead of &lt;br&gt;, etc.
046         *
047         *  @param context The current WikiContext.
048         *  @param params  A Map which contains key-value pairs.  Any
049         *                 parameter that the user has specified on the
050         *                 wiki page will contain String-String
051         *  parameters, but it is possible that at some future date,
052         *  JSPWiki will give you other things that are not Strings.
053         *
054         *  @return HTML, ready to be included into the rendered page.
055         *
056         *  @throws PluginException In case anything goes wrong.
057         */
058        String execute( WikiContext context, Map< String, String > params ) throws PluginException;
059        
060    }