001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.geronimo.console;
018
019 import java.io.IOException;
020 import java.util.HashMap;
021 import java.util.Map;
022 import java.util.Properties;
023
024 import javax.portlet.ActionRequest;
025 import javax.portlet.ActionResponse;
026 import javax.portlet.PortletConfig;
027 import javax.portlet.PortletException;
028 import javax.portlet.PortletRequestDispatcher;
029 import javax.portlet.RenderRequest;
030 import javax.portlet.RenderResponse;
031
032 import org.apache.commons.fileupload.FileItem;
033
034 /**
035 * Base class for handlers for the multi page portlet. Each one is expected
036 * to handle a single page -- the action request before the page is rendered,
037 * the render request, and the action request after the page is rendered.
038 *
039 * @version $Rev: 706640 $ $Date: 2008-10-21 14:44:05 +0000 (Tue, 21 Oct 2008) $
040 */
041 public abstract class MultiPageAbstractHandler {
042 protected final static String BEFORE_ACTION="-before";
043 protected final static String AFTER_ACTION="-after";
044 protected PortletRequestDispatcher view;
045 private final String mode;
046 private final String viewName;
047 private Map<String, FileItem> uploadFiles = new HashMap<String, FileItem>();
048 private Properties uploadFields = new Properties();
049
050 protected MultiPageAbstractHandler(String mode, String viewName) {
051 this.mode = mode;
052 this.viewName = viewName;
053 }
054
055 public String getMode() {
056 return mode;
057 }
058
059 public void init(PortletConfig portletConfig) throws PortletException {
060 if(viewName != null) {
061 view = portletConfig.getPortletContext().getRequestDispatcher(viewName);
062 }
063 }
064
065 public void destroy() {
066 view = null;
067 }
068
069 public PortletRequestDispatcher getView() {
070 return view;
071 }
072
073 protected static boolean isEmpty(String s) {
074 return s == null || s.trim().equals("");
075 }
076
077 /**
078 * Returns the mode for the next screen to render (usually this one)
079 */
080 public abstract String actionBeforeView(ActionRequest request, ActionResponse response, MultiPageModel model) throws PortletException, IOException;
081
082 public abstract void renderView(RenderRequest request, RenderResponse response, MultiPageModel model) throws PortletException, IOException;
083
084 /**
085 * Returns the mode for the next screen to render (usually the one after this in the sequence)
086 */
087 public abstract String actionAfterView(ActionRequest request, ActionResponse response, MultiPageModel model) throws PortletException, IOException;
088
089 public Map<String, FileItem> getUploadFiles() {
090 return uploadFiles;
091 }
092
093 public Properties getUploadFields() {
094 return uploadFields;
095 }
096
097 }