Source Code Cross Referenced for VelocityNavigation.java in  » Web-Framework » TURBINE » org » apache » turbine » modules » navigations » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » TURBINE » org.apache.turbine.modules.navigations 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        package org.apache.turbine.modules.navigations;
02:
03:        /*
04:         * Licensed to the Apache Software Foundation (ASF) under one
05:         * or more contributor license agreements.  See the NOTICE file
06:         * distributed with this work for additional information
07:         * regarding copyright ownership.  The ASF licenses this file
08:         * to you under the Apache License, Version 2.0 (the
09:         * "License"); you may not use this file except in compliance
10:         * with the License.  You may obtain a copy of the License at
11:         *
12:         *   http://www.apache.org/licenses/LICENSE-2.0
13:         *
14:         * Unless required by applicable law or agreed to in writing,
15:         * software distributed under the License is distributed on an
16:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17:         * KIND, either express or implied.  See the License for the
18:         * specific language governing permissions and limitations
19:         * under the License.
20:         */
21:
22:        import org.apache.ecs.ConcreteElement;
23:        import org.apache.ecs.StringElement;
24:        import org.apache.turbine.TurbineConstants;
25:        import org.apache.turbine.services.template.TurbineTemplate;
26:        import org.apache.turbine.services.velocity.TurbineVelocity;
27:        import org.apache.turbine.util.RunData;
28:        import org.apache.velocity.context.Context;
29:
30:        /**
31:         * VelocityNavigation.  This screen relies on the VelocityPage
32:         * being set as the default page.  The doBuildTemplate() assumes the
33:         * user has put the template filename in the RunData parameter and set
34:         * it to the value of the template file to execute.  Specialized
35:         * Navigations screens should extend this class and overide the
36:         * doBuildTemplate( data , context) method.
37:         *
38:         * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
39:         * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
40:         * @version $Id: VelocityNavigation.java 534527 2007-05-02 16:10:59Z tv $
41:         */
42:        public class VelocityNavigation extends TemplateNavigation {
43:            /** The prefix for lookup up navigation pages */
44:            private String prefix = TurbineConstants.NAVIGATION_PREFIX + "/";
45:
46:            /**
47:             * Velocity Navigations extending this class should overide this
48:             * method to perform any particular business logic and add
49:             * information to the context.
50:             *
51:             * @param data Turbine information.
52:             * @param context Context for web pages.
53:             * @exception Exception, a generic exception.
54:             */
55:            protected void doBuildTemplate(RunData data, Context context)
56:                    throws Exception {
57:            }
58:
59:            /**
60:             * Needs to be implemented to make TemplateNavigation like us.
61:             * The actual method that you should override is the one with the
62:             * context in the parameter list.
63:             *
64:             * @param data Turbine information.
65:             * @exception Exception, a generic exception.
66:             */
67:            protected void doBuildTemplate(RunData data) throws Exception {
68:                doBuildTemplate(data, TurbineVelocity.getContext(data));
69:            }
70:
71:            /**
72:             * This Builds the Velocity template.
73:             *
74:             * @param data Turbine information.
75:             * @return A ConcreteElement.
76:             * @exception Exception, a generic exception.
77:             */
78:            public ConcreteElement buildTemplate(RunData data) throws Exception {
79:                Context context = TurbineVelocity.getContext(data);
80:
81:                String navigationTemplate = data.getTemplateInfo()
82:                        .getNavigationTemplate();
83:                String templateName = TurbineTemplate
84:                        .getNavigationTemplateName(navigationTemplate);
85:
86:                StringElement output = new StringElement();
87:                output.setFilterState(false);
88:                output.addElement(TurbineVelocity.handleRequest(context, prefix
89:                        + templateName));
90:                return output;
91:            }
92:
93:        }
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