Source Code Cross Referenced for MaintAction.java in  » J2EE » Jaffa » org » jaffa » components » maint » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » Jaffa » org.jaffa.components.maint 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * ====================================================================
003:         * JAFFA - Java Application Framework For All
004:         *
005:         * Copyright (C) 2002 JAFFA Development Group
006:         *
007:         *     This library is free software; you can redistribute it and/or
008:         *     modify it under the terms of the GNU Lesser General Public
009:         *     License as published by the Free Software Foundation; either
010:         *     version 2.1 of the License, or (at your option) any later version.
011:         *
012:         *     This library is distributed in the hope that it will be useful,
013:         *     but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         *     Lesser General Public License for more details.
016:         *
017:         *     You should have received a copy of the GNU Lesser General Public
018:         *     License along with this library; if not, write to the Free Software
019:         *     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
020:         *
021:         * Redistribution and use of this software and associated documentation ("Software"),
022:         * with or without modification, are permitted provided that the following conditions are met:
023:         * 1.	Redistributions of source code must retain copyright statements and notices.
024:         *         Redistributions must also contain a copy of this document.
025:         * 2.	Redistributions in binary form must reproduce the above copyright notice,
026:         * 	this list of conditions and the following disclaimer in the documentation
027:         * 	and/or other materials provided with the distribution.
028:         * 3.	The name "JAFFA" must not be used to endorse or promote products derived from
029:         * 	this Software without prior written permission. For written permission,
030:         * 	please contact mail to: jaffagroup@yahoo.com.
031:         * 4.	Products derived from this Software may not be called "JAFFA" nor may "JAFFA"
032:         * 	appear in their names without prior written permission.
033:         * 5.	Due credit should be given to the JAFFA Project (http://jaffa.sourceforge.net).
034:         *
035:         * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
036:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038:         * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046:         * SUCH DAMAGE.
047:         * ====================================================================
048:         */
049:
050:        package org.jaffa.components.maint;
051:
052:        import java.lang.NoSuchMethodException;
053:        import java.lang.reflect.Method;
054:        import java.util.*;
055:        import javax.servlet.http.HttpServletRequest;
056:        import org.apache.log4j.Logger;
057:        import org.apache.struts.action.ActionErrors;
058:        import org.jaffa.presentation.portlet.ActionBase;
059:        import org.jaffa.presentation.portlet.FormKey;
060:        import org.jaffa.exceptions.FrameworkException;
061:        import org.jaffa.exceptions.ApplicationExceptions;
062:        import org.jaffa.exceptions.ApplicationException;
063:        import org.jaffa.presentation.portlet.EventHandlerMissingRuntimeException;
064:        import org.jaffa.presentation.portlet.HistoryNav;
065:
066:        /** This is the base class for all Maintenance Component Actions.
067:         * @author  GautamJ
068:         */
069:        public class MaintAction extends ActionBase {
070:
071:            private static final Logger log = Logger
072:                    .getLogger(MaintAction.class);
073:
074:            /** Quits the component and returns the FormKey for the calling screen.
075:             * @return The FormKey for the calling screen. A null will be returned, if no calling screen was specified.
076:             */
077:            public FormKey do_Cancel_Clicked() {
078:                return ((MaintForm) form).getComponent()
079:                        .quitAndReturnToCallingScreen();
080:            }
081:
082:            /** Invokes the create() or update() method on the component, depending on the mode. It then quits the component.
083:             * @return The FormKey for the calling screen. A null will be returned, if no calling screen was specified.
084:             */
085:            public FormKey do_Finish_Clicked() {
086:                MaintForm myForm = (MaintForm) form;
087:                MaintComponent2 myComp = (MaintComponent2) myForm
088:                        .getComponent();
089:
090:                FormKey fk = do_Save_Clicked();
091:                if (myForm.hasErrors(request))
092:                    return fk;
093:                else
094:                    return myComp.quitAndReturnToCallingScreen();
095:            }
096:
097:            /** Invokes the create() or update() method on the component, depending on the mode.
098:             * @return The FormKey for the screen.
099:             */
100:            public FormKey do_Save_Clicked() {
101:                MaintForm myForm = (MaintForm) form;
102:                MaintComponent2 myComp = (MaintComponent2) myForm
103:                        .getComponent();
104:
105:                try {
106:                    // This will stop double submits
107:                    performTokenValidation(request);
108:
109:                    // First validate the current screen
110:                    if (invokeDoValidateForScreen(myComp
111:                            .getCurrentScreenCounter())) {
112:                        // Now validate all the other screens
113:                        if (invokeDoValidateForScreensOtherThanCurrent(myComp)) {
114:                            if (myComp.isCreateMode()) {
115:                                myComp.create();
116:                                myComp.setMode(IMaintComponent.MODE_UPDATE);
117:
118:                                // move to next screen, if the current screen is unavailable in update mode
119:                                if (!myComp.determineCurrentScreen()
120:                                        .isAvailableInUpdateMode())
121:                                    myComp.determineAndSetNextScreen();
122:
123:                                // Remove links from the HistoryNav, which are not supported in the update mode
124:                                fixHistoryNavList(myComp);
125:                            } else {
126:                                myComp.update(true);
127:                            }
128:                        }
129:                    }
130:                } catch (ApplicationExceptions e) {
131:                    myForm.raiseError(request, ActionErrors.GLOBAL_ERROR, e);
132:                } catch (FrameworkException e) {
133:                    log.error(null, e);
134:                    myForm.raiseError(request, ActionErrors.GLOBAL_ERROR,
135:                            "error.framework.general");
136:                }
137:
138:                return myComp.determineFormKey();
139:            }
140:
141:            /** Invokes the delete() method on the component. It then quits the component.
142:             * @return The FormKey for the calling screen. A null will be returned, if no calling screen was specified.
143:             */
144:            public FormKey do_Delete_Clicked() {
145:                MaintForm myForm = (MaintForm) form;
146:                MaintComponent2 myComp = (MaintComponent2) myForm
147:                        .getComponent();
148:
149:                try {
150:                    // This will stop double submits
151:                    performTokenValidation(request);
152:
153:                    myComp.delete(true);
154:                    return myComp.quitAndReturnToCallingScreen();
155:                } catch (ApplicationExceptions e) {
156:                    myForm.raiseError(request, ActionErrors.GLOBAL_ERROR, e);
157:                } catch (FrameworkException e) {
158:                    e.printStackTrace();
159:                    myForm.raiseError(request, ActionErrors.GLOBAL_ERROR,
160:                            "error.framework.general");
161:                }
162:
163:                return myComp.determineFormKey();
164:            }
165:
166:            /** Invokes the retrieve() method on the component.
167:             * @return The FormKey for the screen.
168:             */
169:            public FormKey do_Refresh_Clicked() {
170:                MaintForm myForm = (MaintForm) form;
171:                MaintComponent2 myComp = (MaintComponent2) myForm
172:                        .getComponent();
173:
174:                try {
175:                    myComp.retrieve();
176:                } catch (ApplicationExceptions e) {
177:                    myForm.raiseError(request, ActionErrors.GLOBAL_ERROR, e);
178:                } catch (FrameworkException e) {
179:                    e.printStackTrace();
180:                    myForm.raiseError(request, ActionErrors.GLOBAL_ERROR,
181:                            "error.framework.general");
182:                }
183:
184:                return myComp.determineFormKey();
185:            }
186:
187:            /** Determines the currentFormKey
188:             * This event is invoked when a user changes the settings of the UserGrid in the Results screen.
189:             * @return The FormKey for the Results screen.
190:             */
191:            public FormKey do_refresh() {
192:                MaintForm myForm = (MaintForm) form;
193:                MaintComponent2 myComp = (MaintComponent2) myForm
194:                        .getComponent();
195:                return myComp.determineFormKey();
196:            }
197:
198:            /** This will invoke the prevalidate method on the component if required for the current screen.
199:             * It then moves to the next screen
200:             * @return The FormKey for the next screen.
201:             */
202:            public FormKey do_Next_Clicked() {
203:                MaintForm myForm = (MaintForm) form;
204:                MaintComponent2 myComp = (MaintComponent2) myForm
205:                        .getComponent();
206:
207:                if (invokeDoValidateForScreen(myComp.getCurrentScreenCounter())) {
208:                    try {
209:                        MaintComponent2.Screen currentScreen = myComp
210:                                .determineCurrentScreen();
211:                        if (currentScreen.isPerformTxValidationOnNextAction()) {
212:                            if (myComp.isCreateMode())
213:                                myComp.prevalidateCreate();
214:                            else
215:                                myComp.prevalidateUpdate(true);
216:                        }
217:                        myComp.determineAndSetNextScreen();
218:                    } catch (ApplicationExceptions e) {
219:                        myForm
220:                                .raiseError(request, ActionErrors.GLOBAL_ERROR,
221:                                        e);
222:                    } catch (FrameworkException e) {
223:                        log.error(null, e);
224:                        myForm.raiseError(request, ActionErrors.GLOBAL_ERROR,
225:                                "error.framework.general");
226:                    }
227:                }
228:                return myComp.determineFormKey();
229:            }
230:
231:            /** It moves to the previous screen
232:             * @return The FormKey for the previous screen.
233:             */
234:            public FormKey do_Previous_Clicked() {
235:                MaintForm myForm = (MaintForm) form;
236:                MaintComponent2 myComp = (MaintComponent2) myForm
237:                        .getComponent();
238:
239:                //if (invokeDoValidateForScreen(myComp.getCurrentScreenCounter()))
240:                //    myComp.determineAndSetPreviousScreen();
241:
242:                myComp.determineAndSetPreviousScreen();
243:                return myComp.determineFormKey();
244:            }
245:
246:            /* This will invoke the 'public boolean doValidate{n}(HttpServletRequest request)' method
247:             */
248:            private boolean invokeDoValidateForScreen(int screenCounter) {
249:                String methodName = "doValidate" + screenCounter;
250:                Method method = null;
251:                try {
252:                    method = form.getClass().getMethod(methodName,
253:                            new Class[] { HttpServletRequest.class });
254:                    if (method.getReturnType() != Boolean.TYPE)
255:                        throw new NoSuchMethodException();
256:                } catch (NoSuchMethodException e) {
257:                    String str = "The method 'public boolean doValidate"
258:                            + screenCounter
259:                            + "(HttpServletRequest request) needs to be defined in the class "
260:                            + form.getClass().getName();
261:                    log.error(str, e);
262:                    throw new EventHandlerMissingRuntimeException(str);
263:                }
264:
265:                try {
266:                    Boolean output = (Boolean) method.invoke(form,
267:                            new Object[] { request });
268:                    return output.booleanValue();
269:                } catch (Exception e) {
270:                    // should never happen
271:                    throw new RuntimeException(e);
272:                }
273:            }
274:
275:            /* This will invoke the 'public boolean doValidate{n}(HttpServletRequest request)' method
276:             * for all the screens of the component except the current screen.
277:             */
278:            private boolean invokeDoValidateForScreensOtherThanCurrent(
279:                    MaintComponent2 myComp) {
280:                boolean valid = true;
281:                for (int i = 0; i < myComp.getScreens().length; i++) {
282:                    if (i != myComp.getCurrentScreenCounter()) {
283:                        if (!invokeDoValidateForScreen(i))
284:                            valid = false;
285:                    }
286:                }
287:                return valid;
288:            }
289:
290:            /** Remove links from the HistoryNav, which are not supported in the update mode.
291:             */
292:            private void fixHistoryNavList(MaintComponent2 myComp) {
293:                try {
294:                    List historyNavList = HistoryNav.obtainHistoryNav(request);
295:                    if (historyNavList != null && historyNavList.size() > 0) {
296:                        // create a Map of Screen.FormName/Screen objects
297:                        MaintComponent2.Screen[] screens = myComp.getScreens();
298:                        if (screens != null && screens.length > 0) {
299:                            Map screenMap = new HashMap();
300:                            for (int i = 0; i < screens.length; i++) {
301:                                MaintComponent2.Screen screen = screens[i];
302:                                screenMap.put(screen.getFormName(), screen);
303:                            }
304:
305:                            for (Iterator itr = historyNavList.iterator(); itr
306:                                    .hasNext();) {
307:                                FormKey fk = (FormKey) itr.next();
308:                                // Check the FormKeys for our component only
309:                                if (myComp.getComponentId().equals(
310:                                        fk.getComponentId())
311:                                        && fk.getFormName() != null) {
312:                                    MaintComponent2.Screen screen = (MaintComponent2.Screen) screenMap
313:                                            .get(fk.getFormName());
314:                                    if (screen != null
315:                                            && !screen
316:                                                    .isAvailableInUpdateMode())
317:                                        itr.remove();
318:                                }
319:                            }
320:                        }
321:                    }
322:                    request.setAttribute(HistoryNav.HISTORY_NAV_PARAMETER,
323:                            historyNavList);
324:                } catch (Exception e) {
325:                    // do nothing
326:                }
327:            }
328:        }
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