| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| */ |
| package org.apache.wiki.plugin; |
| |
| import org.apache.wiki.WikiContext; |
| import org.apache.wiki.api.exceptions.PluginException; |
| import org.apache.wiki.api.plugin.WikiPlugin; |
| import org.apache.wiki.util.TextUtil; |
| |
| import java.util.Map; |
| |
| /** |
| * Provides a page-specific counter, it is reset every time a page is rendered, so it is not usable as a hitcounter. |
| * <br>Stores a variable in the WikiContext called "counter", with the name of the optionally specified variable "name". |
| * <br>For example: If name is "thispage", then the variable name is called "counter-thispage". |
| * |
| * <p>Parameters : </p> |
| * <ul> |
| * <li><b>name</b> - Name of the counter. Optional.</li> |
| * <li><b>increment</b> - The amount to increment, may be a negative value, default is 1. Optional.</li> |
| * <li><b>showResult</b> - Should the counter value be visible on the page, default is true. Optional.</li> |
| * </ul> |
| * |
| * @since 1.9.30 |
| */ |
| public class Counter implements WikiPlugin { |
| // private static Logger log = Logger.getLogger( Counter.class ); |
| |
| /** Parameter name for setting the name. Value is <tt>{@value}</tt>. */ |
| public static final String PARAM_NAME = "name"; |
| /** Parameter name for setting the increment. Value is <tt>{@value}</tt>. */ |
| public static final String PARAM_INCREMENT = "increment"; |
| /** Parameter name for setting the showResult. Value is <tt>{@value}</tt>. */ |
| public static final String PARAM_SHOW_RESULT = "showResult"; |
| /** Parameter name for setting the start. Value is <tt>{@value}</tt>. */ |
| public static final String PARAM_START = "start"; |
| public static final String DEFAULT_NAME = "counter"; |
| private static final int DEFAULT_INCREMENT = 1; |
| private static final boolean DEFAULT_SHOW_RESULT = true; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public String execute( final WikiContext context, final Map< String, String > params ) throws PluginException { |
| // First, determine which kind of name we use to store in the WikiContext. |
| String countername = params.get( PARAM_NAME); |
| |
| if( countername == null ) { |
| countername = DEFAULT_NAME; |
| } else { |
| countername = DEFAULT_NAME+"-"+countername; |
| } |
| |
| // Fetch the old value |
| Integer val = (Integer)context.getVariable( countername ); |
| if( val == null ) { |
| val = 0; |
| } |
| |
| // Check if we need to reset this |
| final String start = params.get( PARAM_START ); |
| if( start != null ) { |
| val = Integer.parseInt( start ); |
| } else { |
| // Determine how much to increment |
| final String incrementObj = params.get( PARAM_INCREMENT ); |
| int increment = DEFAULT_INCREMENT; |
| if( incrementObj != null ) { |
| increment = Integer.parseInt( incrementObj ); |
| } |
| |
| val = val + increment; |
| } |
| |
| context.setVariable( countername, val ); |
| |
| // check if we want to hide the result (just count, don't show result on the page |
| final String showObj = params.get(PARAM_SHOW_RESULT); |
| boolean show = DEFAULT_SHOW_RESULT; |
| if( showObj != null ) { |
| show = TextUtil.isPositive( showObj ); |
| } |
| |
| if( show ) { |
| return val.toString(); |
| } |
| |
| return ""; |
| } |
| |
| } |