| /* |
| * 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 java.util.Map; |
| |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| |
| /** |
| * A very simple selector that operates on string literals, useful especially |
| * in conjunction with input modules. Usage example: |
| * <pre> |
| * <map:selector name="simple" src="org.apache.cocoon.selection.SimpleSelector"/> |
| * |
| * <map:select type="simple"> |
| * <map:parameter name="value" value="{request:method}"/> |
| * <map:when test="GET"> |
| * ... |
| * </map:when> |
| * <map:when test="POST"> |
| * ... |
| * </map:when> |
| * <map:when test="PUT"> |
| * ... |
| * </map:when> |
| * <map:otherwise> |
| * ... |
| * </map:otherwise> |
| * </map:select> |
| * </pre> |
| * |
| * @author <a href="mailto:haul@apache.org">Christian Haul</a> |
| * @version CVS $Id: SimpleSelector.java,v 1.3 2004/03/05 13:02:57 bdelacretaz Exp $ |
| * @since 2.1 |
| */ |
| public class SimpleSelector extends AbstractSwitchSelector implements ThreadSafe { |
| |
| public Object getSelectorContext(Map objectModel, Parameters parameters) { |
| return parameters.getParameter("value", ""); |
| } |
| |
| public boolean select(String expression, Object selectorContext) { |
| if (selectorContext == null) { |
| if (getLogger().isWarnEnabled()) |
| getLogger().warn("Value not set -- failing."); |
| return false; |
| } |
| |
| return selectorContext.equals(expression); |
| } |
| |
| } |