| /* |
| * 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.cocoon.selection; |
| |
| import org.apache.avalon.framework.configuration.Configurable; |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.cocoon.environment.ObjectModelHelper; |
| |
| import java.util.Map; |
| |
| /** |
| * A <code>Selector</code> that matches a string against a configurable request parameter's value. |
| * |
| * <p><b>Global and local configuration</b></p> |
| * <table border="1"> |
| * <tr><td><code>parameter-name</code></td><td>Name of the request |
| * parameter whose value to match against</td></tr> |
| * </table> |
| * |
| * @author <a href="mailto:haul@apache.org">Christian Haul</a> |
| * @author <a href="mailto:sylvain@apache.org">Sylvain Wallez</a> |
| * @author <a href="mailto:vgritsenko@apache.org">Vadim Gritsenko</a> |
| * @author <a href="mailto:crafterm@apache.org">Marcus Crafter</a> |
| * @version CVS $Id$ |
| */ |
| public class RequestParameterSelector extends AbstractSwitchSelector |
| implements Configurable { |
| |
| protected String defaultName; |
| |
| public void configure(Configuration config) throws ConfigurationException { |
| this.defaultName = config.getChild("parameter-name").getValue(null); |
| } |
| |
| public Object getSelectorContext(Map objectModel, Parameters parameters) { |
| |
| String name = parameters.getParameter("parameter-name", this.defaultName); |
| |
| if (name == null) { |
| getLogger().warn("No parameter name given -- failing."); |
| return null; |
| } |
| |
| return ObjectModelHelper.getRequest(objectModel).getParameter(name); |
| } |
| |
| public boolean select(String expression, Object selectorContext) { |
| if (selectorContext == null) { |
| getLogger().debug("Request parameter '" + selectorContext + "' not set -- failing."); |
| return false; |
| } |
| |
| return selectorContext.equals(expression); |
| } |
| } |