| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed 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.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| import org.apache.cocoon.environment.ObjectModelHelper; |
| |
| import java.util.Map; |
| |
| /** |
| * A <code>Selector</code> that matches a string against a configurable session |
| * attribute's string represenation. |
| * |
| * <p><b>Global and local configuration</b></p> |
| * <table border="1"> |
| * <tr><td><code>attribute-name</code></td><td>String identifying the session attribute.</td></tr> |
| * </table> |
| * |
| * @version $Id$ |
| */ |
| public class SessionAttributeSelector extends AbstractLogEnabled |
| implements Configurable, ThreadSafe, Selector { |
| |
| protected String defaultName; |
| |
| public void configure(Configuration config) throws ConfigurationException { |
| this.defaultName = config.getChild("attribute-name").getValue(null); |
| } |
| |
| public boolean select(String expression, Map objectModel, Parameters parameters) { |
| String name = parameters.getParameter("attribute-name", this.defaultName); |
| |
| if (name == null) { |
| getLogger().warn("No attribute name given -- failing."); |
| return false; |
| } |
| |
| Object value = ObjectModelHelper.getRequest(objectModel).getSession().getAttribute(name); |
| if (value == null) { |
| getLogger().debug("Session attribute '" + name + "' not set -- failing."); |
| return false; |
| } |
| |
| return value.toString().equals(expression); |
| } |
| } |