| 1 | package org.ufcspa.simdecs.bn.ui; |
| 2 | |
| 3 | import org.ufcspa.simdecs.bn.entity.Answer; |
| 4 | import org.ufcspa.simdecs.bn.ui.util.JsfUtil; |
| 5 | import org.ufcspa.simdecs.bn.ui.util.PaginationHelper; |
| 6 | import org.ufcspa.simdecs.bn.jpa.AnswerJpaController; |
| 7 | |
| 8 | import java.io.Serializable; |
| 9 | import java.util.ResourceBundle; |
| 10 | import javax.annotation.Resource; |
| 11 | import javax.faces.bean.ManagedBean; |
| 12 | import javax.faces.bean.SessionScoped; |
| 13 | import javax.faces.component.UIComponent; |
| 14 | import javax.faces.context.FacesContext; |
| 15 | import javax.faces.convert.Converter; |
| 16 | import javax.faces.convert.FacesConverter; |
| 17 | import javax.faces.model.DataModel; |
| 18 | import javax.faces.model.ListDataModel; |
| 19 | import javax.faces.model.SelectItem; |
| 20 | import javax.persistence.EntityManagerFactory; |
| 21 | import javax.persistence.PersistenceUnit; |
| 22 | import javax.transaction.UserTransaction; |
| 23 | |
| 24 | @ManagedBean(name = "answerController") |
| 25 | @SessionScoped |
| 26 | public class AnswerController implements Serializable { |
| 27 | |
| 28 | @Resource |
| 29 | private UserTransaction utx = null; |
| 30 | @PersistenceUnit(unitName = "simdecsEclipseLinkPU") |
| 31 | private EntityManagerFactory emf = null; |
| 32 | private Answer current; |
| 33 | private DataModel items = null; |
| 34 | private AnswerJpaController jpaController = null; |
| 35 | private PaginationHelper pagination; |
| 36 | private int selectedItemIndex; |
| 37 | |
| 38 | public AnswerController() { |
| 39 | } |
| 40 | |
| 41 | public Answer getSelected() { |
| 42 | if (current == null) { |
| 43 | current = new Answer(); |
| 44 | selectedItemIndex = -1; |
| 45 | } |
| 46 | return current; |
| 47 | } |
| 48 | |
| 49 | private AnswerJpaController getJpaController() { |
| 50 | if (jpaController == null) { |
| 51 | jpaController = new AnswerJpaController(utx, emf); |
| 52 | } |
| 53 | return jpaController; |
| 54 | } |
| 55 | |
| 56 | public PaginationHelper getPagination() { |
| 57 | if (pagination == null) { |
| 58 | pagination = new PaginationHelper(10) { |
| 59 | |
| 60 | @Override |
| 61 | public int getItemsCount() { |
| 62 | return getJpaController().getAnswerCount(); |
| 63 | } |
| 64 | |
| 65 | @Override |
| 66 | public DataModel createPageDataModel() { |
| 67 | return new ListDataModel(getJpaController().findAnswerEntities(getPageSize(), getPageFirstItem())); |
| 68 | } |
| 69 | }; |
| 70 | } |
| 71 | return pagination; |
| 72 | } |
| 73 | |
| 74 | public String prepareList() { |
| 75 | recreateModel(); |
| 76 | return "List"; |
| 77 | } |
| 78 | |
| 79 | public String prepareView() { |
| 80 | current = (Answer) getItems().getRowData(); |
| 81 | selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex(); |
| 82 | return "View"; |
| 83 | } |
| 84 | |
| 85 | public String prepareCreate() { |
| 86 | current = new Answer(); |
| 87 | selectedItemIndex = -1; |
| 88 | return "Create"; |
| 89 | } |
| 90 | |
| 91 | public String create() { |
| 92 | try { |
| 93 | getJpaController().create(current); |
| 94 | JsfUtil.addSuccessMessage(ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("AnswerCreated")); |
| 95 | return prepareCreate(); |
| 96 | } catch (Exception e) { |
| 97 | JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("PersistenceErrorOccured")); |
| 98 | return null; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | public String prepareEdit() { |
| 103 | current = (Answer) getItems().getRowData(); |
| 104 | selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex(); |
| 105 | return "Edit"; |
| 106 | } |
| 107 | |
| 108 | public String update() { |
| 109 | try { |
| 110 | getJpaController().edit(current); |
| 111 | JsfUtil.addSuccessMessage(ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("AnswerUpdated")); |
| 112 | return "View"; |
| 113 | } catch (Exception e) { |
| 114 | JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("PersistenceErrorOccured")); |
| 115 | return null; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | public String destroy() { |
| 120 | current = (Answer) getItems().getRowData(); |
| 121 | selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex(); |
| 122 | performDestroy(); |
| 123 | recreatePagination(); |
| 124 | recreateModel(); |
| 125 | return "List"; |
| 126 | } |
| 127 | |
| 128 | public String destroyAndView() { |
| 129 | performDestroy(); |
| 130 | recreateModel(); |
| 131 | updateCurrentItem(); |
| 132 | if (selectedItemIndex >= 0) { |
| 133 | return "View"; |
| 134 | } else { |
| 135 | // all items were removed - go back to list |
| 136 | recreateModel(); |
| 137 | return "List"; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | private void performDestroy() { |
| 142 | try { |
| 143 | getJpaController().destroy(current.getId()); |
| 144 | JsfUtil.addSuccessMessage(ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("AnswerDeleted")); |
| 145 | } catch (Exception e) { |
| 146 | JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("PersistenceErrorOccured")); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | private void updateCurrentItem() { |
| 151 | int count = getJpaController().getAnswerCount(); |
| 152 | if (selectedItemIndex >= count) { |
| 153 | // selected index cannot be bigger than number of items: |
| 154 | selectedItemIndex = count - 1; |
| 155 | // go to previous page if last page disappeared: |
| 156 | if (pagination.getPageFirstItem() >= count) { |
| 157 | pagination.previousPage(); |
| 158 | } |
| 159 | } |
| 160 | if (selectedItemIndex >= 0) { |
| 161 | current = getJpaController().findAnswerEntities(1, selectedItemIndex).get(0); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | public DataModel getItems() { |
| 166 | if (items == null) { |
| 167 | items = getPagination().createPageDataModel(); |
| 168 | } |
| 169 | return items; |
| 170 | } |
| 171 | |
| 172 | private void recreateModel() { |
| 173 | items = null; |
| 174 | } |
| 175 | |
| 176 | private void recreatePagination() { |
| 177 | pagination = null; |
| 178 | } |
| 179 | |
| 180 | public String next() { |
| 181 | getPagination().nextPage(); |
| 182 | recreateModel(); |
| 183 | return "List"; |
| 184 | } |
| 185 | |
| 186 | public String previous() { |
| 187 | getPagination().previousPage(); |
| 188 | recreateModel(); |
| 189 | return "List"; |
| 190 | } |
| 191 | |
| 192 | public SelectItem[] getItemsAvailableSelectMany() { |
| 193 | return JsfUtil.getSelectItems(getJpaController().findAnswerEntities(), false); |
| 194 | } |
| 195 | |
| 196 | public SelectItem[] getItemsAvailableSelectOne() { |
| 197 | return JsfUtil.getSelectItems(getJpaController().findAnswerEntities(), true); |
| 198 | } |
| 199 | |
| 200 | @FacesConverter(forClass = Answer.class) |
| 201 | public static class AnswerControllerConverter implements Converter { |
| 202 | |
| 203 | public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { |
| 204 | if (value == null || value.length() == 0) { |
| 205 | return null; |
| 206 | } |
| 207 | AnswerController controller = (AnswerController) facesContext.getApplication().getELResolver(). |
| 208 | getValue(facesContext.getELContext(), null, "answerController"); |
| 209 | return controller.getJpaController().findAnswer(getKey(value)); |
| 210 | } |
| 211 | |
| 212 | java.lang.Long getKey(String value) { |
| 213 | java.lang.Long key; |
| 214 | key = Long.valueOf(value); |
| 215 | return key; |
| 216 | } |
| 217 | |
| 218 | String getStringKey(java.lang.Long value) { |
| 219 | StringBuffer sb = new StringBuffer(); |
| 220 | sb.append(value); |
| 221 | return sb.toString(); |
| 222 | } |
| 223 | |
| 224 | public String getAsString(FacesContext facesContext, UIComponent component, Object object) { |
| 225 | if (object == null) { |
| 226 | return null; |
| 227 | } |
| 228 | if (object instanceof Answer) { |
| 229 | Answer o = (Answer) object; |
| 230 | return getStringKey(o.getId()); |
| 231 | } else { |
| 232 | throw new IllegalArgumentException("object " + object + " is of type " + object.getClass().getName() + "; expected type: " + AnswerController.class.getName()); |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | } |