Source Code Cross Referenced for AjaxRequestSelector.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » ajax » Java Source Code / Java DocumentationJava Source Code and Java Documentation

01:        /*
02:         * Licensed to the Apache Software Foundation (ASF) under one or more
03:         * contributor license agreements.  See the NOTICE file distributed with
04:         * this work for additional information regarding copyright ownership.
05:         * The ASF licenses this file to You under the Apache License, Version 2.0
06:         * (the "License"); you may not use this file except in compliance with
07:         * the License.  You may obtain a copy of the License at
08:         *
09:         *      http://www.apache.org/licenses/LICENSE-2.0
10:         *
11:         * Unless required by applicable law or agreed to in writing, software
12:         * distributed under the License is distributed on an "AS IS" BASIS,
13:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14:         * See the License for the specific language governing permissions and
15:         * limitations under the License.
16:         */
17:        package org.apache.cocoon.ajax;
18:
19:        import java.util.Map;
20:
21:        import org.apache.avalon.framework.parameters.Parameters;
22:        import org.apache.cocoon.environment.ObjectModelHelper;
23:        import org.apache.cocoon.environment.Request;
24:        import org.apache.cocoon.selection.AbstractSwitchSelector;
25:        import org.apache.commons.lang.BooleanUtils;
26:
27:        /**
28:         * Choose a select branch depending on if the current request is an Ajax request.
29:         * The test value can be either "<code>true</code>" or "<code>false</code>".
30:         * 
31:         * <pre>
32:         *   &lt;map:select type="ajax-request"&gt;
33:         *     &lt;map:when test="true"&gt;
34:         *       ... ajax request ...
35:         *     &lt;/map:when&gt;
36:         *     &lt;map:otherwise&gt;
37:         *       ... non ajax request ...
38:         *     &lt;/map:otherwise&gt;
39:         *   &lt;/map:select&gt;
40:         * </pre>
41:         * 
42:         * @since 2.1.8
43:         * @version $Id: AjaxRequestSelector.java 448479 2006-09-21 07:33:36Z crossley $
44:         */
45:        public class AjaxRequestSelector extends AbstractSwitchSelector {
46:
47:            public Object getSelectorContext(Map objectModel,
48:                    Parameters parameters) {
49:                Request req = ObjectModelHelper.getRequest(objectModel);
50:                return BooleanUtils.toBooleanObject(AjaxHelper
51:                        .isAjaxRequest(req));
52:            }
53:
54:            public boolean select(String expression, Object selectorContext) {
55:                boolean test = BooleanUtils.toBoolean(expression);
56:                return test == ((Boolean) selectorContext).booleanValue();
57:            }
58:        }