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Java > Open Source Codes > com > jcorporate > expresso > ext > controller > Upload


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64
65 /**
66  * Upload: A controller to demonstrate uploading of files. Doesn't actually
67  * *do* anything with the uploaded file :-)
68  *
69  */
70 package com.jcorporate.expresso.ext.controller;
71
72 import com.jcorporate.expresso.core.controller.ControllerException;
73 import com.jcorporate.expresso.core.controller.ControllerRequest;
74 import com.jcorporate.expresso.core.controller.ControllerResponse;
75 import com.jcorporate.expresso.core.controller.DBController;
76 import com.jcorporate.expresso.core.controller.Input;
77 import com.jcorporate.expresso.core.controller.NonHandleableException;
78 import com.jcorporate.expresso.core.controller.Output;
79 import com.jcorporate.expresso.core.controller.State;
80 import com.jcorporate.expresso.core.controller.Transition;
81 import com.jcorporate.expresso.core.misc.StringUtil;
82 import org.apache.log4j.Logger;
83
84 import java.io.File JavaDoc;
85 import java.util.Enumeration JavaDoc;
86 import java.util.Hashtable JavaDoc;
87
88
89 /**
90  * This class is a sample of using uploading files. Your own implementation
91  * would do something during the runUploadState to process the file.
92  *
93  * @author Michael Rimov
94  */
95 public class Upload
96         extends DBController {
97     private static Logger log = Logger.getLogger(Upload.class);
98
99     /**
100      *
101      */
102     public Upload() {
103         State prompt = new State("prompt", "Prompt for Upload of File");
104         addState(prompt);
105         setInitialState("prompt");
106
107         State upload = new State("upload", "Process Upload");
108         addState(upload);
109         this.setSchema(com.jcorporate.expresso.core.ExpressoSchema.class);
110     } /* Upload() */
111
112     /**
113      * Return the title of this Controller
114      *
115      * @return java.lang.String The Title of the controller
116      */
117     public String JavaDoc getTitle() {
118         return ("Upload");
119     } /* getTitle() */
120
121
122     private void runPromptState(ControllerRequest req, ControllerResponse res)
123             throws ControllerException {
124         String JavaDoc currentNumber = StringUtil.notNull(req.getParameter("number"));
125
126         // this attribute is never fetched in framework; can we remove it? LAH 4/04
127 res.setAttribute("formEncoding", "multipart/form-data");
128
129         int promptCount = 1;
130
131         if (!currentNumber.equals("")) {
132             try {
133                 promptCount = new Integer JavaDoc(currentNumber).intValue();
134             } catch (NumberFormatException JavaDoc ne) {
135                 throw new ControllerException(ne);
136             }
137         }
138         for (int currCount = 1; currCount <= promptCount; currCount++) {
139             Input filePrompt = new Input("File" + currCount);
140             filePrompt.setLabel("File");
141             filePrompt.setType("file");
142             res.add(filePrompt);
143         }
144
145
146         Transition doUpload = new Transition("upload", "Upload", this.getClass(), "upload");
147         res.add(doUpload);
148
149         Transition promptMore = new Transition("morefiles", "More Files", this.getClass(), "prompt");
150         promptMore.addParam("number", "" + promptCount + 5);
151         res.add(promptMore);
152     } /* run() */
153
154
155     private void runUploadState(ControllerRequest req, ControllerResponse res)
156             throws ControllerException, NonHandleableException {
157         Hashtable JavaDoc params = req.getParameters();
158         int processedCount = 0;
159
160         for (Enumeration JavaDoc e = params.keys(); e.hasMoreElements();) {
161             String JavaDoc oneParamName = (String JavaDoc) e.nextElement();
162             String JavaDoc clientFileName = null;
163             String JavaDoc fileParamName = null;
164
165             if (req.isFileParameter(fileParamName)) {
166                 res.addOutput(new Output("title", "Files Uploaded"));
167
168                 String JavaDoc fileName = req.getFileName(fileParamName);
169                 File JavaDoc f = new File JavaDoc(fileName);
170
171                 if (f != null) {
172                     res.addOutput(new Output(clientFileName, "" + f.length()));
173                 } else {
174                     res.addOutput(new Output("Not found"));
175                 }
176
177                 processedCount++;
178
179                 /* Here we queue the job that either publishes or */
180
181                 /* distributes the named file as the named resource */
182                 if (log.isInfoEnabled()) {
183                     log.info("User " + req.getUser() + " uploaded file '" +
184                             fileName + "'");
185                 }
186             } /* if */
187
188         } /* for each parameter */
189
190
191         res.addOutput(new Output("" + processedCount + " files processed"));
192     } /* runUploadState */
193
194 } /* Upload */
195
196 /* Upload */
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