| 1 | package org.ufcspa.simdecs.bn.ui; |
| 2 | |
| 3 | import java.io.Serializable; |
| 4 | import java.util.ResourceBundle; |
| 5 | import javax.annotation.Resource; |
| 6 | import javax.faces.bean.ApplicationScoped; |
| 7 | import javax.faces.bean.ManagedBean; |
| 8 | import javax.faces.component.UIComponent; |
| 9 | import javax.faces.context.FacesContext; |
| 10 | import javax.faces.convert.Converter; |
| 11 | import javax.faces.convert.FacesConverter; |
| 12 | import javax.faces.model.DataModel; |
| 13 | import javax.faces.model.ListDataModel; |
| 14 | import javax.faces.model.SelectItem; |
| 15 | import javax.persistence.EntityManagerFactory; |
| 16 | import javax.persistence.PersistenceUnit; |
| 17 | import javax.transaction.UserTransaction; |
| 18 | import org.primefaces.event.RowEditEvent; |
| 19 | import org.ufcspa.simdecs.bn.entity.Node; |
| 20 | import org.ufcspa.simdecs.bn.jpa.NodeJpaController; |
| 21 | import org.ufcspa.simdecs.bn.ui.util.JsfUtil; |
| 22 | import org.ufcspa.simdecs.bn.ui.util.PaginationHelper; |
| 23 | |
| 24 | @ManagedBean(name = "nodeController") |
| 25 | @ApplicationScoped |
| 26 | public class NodeController implements Serializable { |
| 27 | |
| 28 | @Resource |
| 29 | private UserTransaction utx = null; |
| 30 | @PersistenceUnit(unitName = "simdecsEclipseLinkPU") |
| 31 | private EntityManagerFactory emf = null; |
| 32 | private Node current; |
| 33 | private DataModel items = null; |
| 34 | private NodeJpaController jpaController = null; |
| 35 | private PaginationHelper pagination; |
| 36 | private int selectedItemIndex; |
| 37 | |
| 38 | public NodeController() { |
| 39 | } |
| 40 | |
| 41 | public void rowEditListener(RowEditEvent event) throws Exception { |
| 42 | Node node = (Node) event.getObject(); |
| 43 | getJpaController().edit(node); |
| 44 | } |
| 45 | |
| 46 | public Node getSelected() { |
| 47 | if (current == null) { |
| 48 | current = new Node(); |
| 49 | selectedItemIndex = -1; |
| 50 | } |
| 51 | return current; |
| 52 | } |
| 53 | |
| 54 | private NodeJpaController getJpaController() { |
| 55 | if (jpaController == null) { |
| 56 | jpaController = new NodeJpaController(utx, emf); |
| 57 | } |
| 58 | return jpaController; |
| 59 | } |
| 60 | |
| 61 | public PaginationHelper getPagination() { |
| 62 | if (pagination == null) { |
| 63 | pagination = new PaginationHelper(10) { |
| 64 | |
| 65 | @Override |
| 66 | public int getItemsCount() { |
| 67 | return getJpaController().getNodeCount(); |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public DataModel createPageDataModel() { |
| 72 | return new ListDataModel(getJpaController().findNodeEntities(getPageSize(), getPageFirstItem())); |
| 73 | } |
| 74 | }; |
| 75 | } |
| 76 | return pagination; |
| 77 | } |
| 78 | |
| 79 | public String prepareList() { |
| 80 | recreateModel(); |
| 81 | return "List"; |
| 82 | } |
| 83 | |
| 84 | public String prepareView() { |
| 85 | current = (Node) getItems().getRowData(); |
| 86 | selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex(); |
| 87 | return "View"; |
| 88 | } |
| 89 | |
| 90 | public String prepareCreate() { |
| 91 | current = new Node(); |
| 92 | selectedItemIndex = -1; |
| 93 | return "Create"; |
| 94 | } |
| 95 | |
| 96 | public String create() { |
| 97 | try { |
| 98 | getJpaController().create(current); |
| 99 | JsfUtil.addSuccessMessage(ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("NodeCreated")); |
| 100 | return prepareCreate(); |
| 101 | } catch (Exception e) { |
| 102 | JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("PersistenceErrorOccured")); |
| 103 | return null; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | public String prepareEdit() { |
| 108 | current = (Node) getItems().getRowData(); |
| 109 | selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex(); |
| 110 | return "Edit"; |
| 111 | } |
| 112 | |
| 113 | public String update() { |
| 114 | try { |
| 115 | getJpaController().edit(current); |
| 116 | JsfUtil.addSuccessMessage(ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("NodeUpdated")); |
| 117 | return "View"; |
| 118 | } catch (Exception e) { |
| 119 | JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("PersistenceErrorOccured")); |
| 120 | return null; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | public String destroy() { |
| 125 | current = (Node) getItems().getRowData(); |
| 126 | selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex(); |
| 127 | performDestroy(); |
| 128 | recreatePagination(); |
| 129 | recreateModel(); |
| 130 | return "List"; |
| 131 | } |
| 132 | |
| 133 | public String destroyAndView() { |
| 134 | performDestroy(); |
| 135 | recreateModel(); |
| 136 | updateCurrentItem(); |
| 137 | if (selectedItemIndex >= 0) { |
| 138 | return "View"; |
| 139 | } else { |
| 140 | // all items were removed - go back to list |
| 141 | recreateModel(); |
| 142 | return "List"; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | private void performDestroy() { |
| 147 | try { |
| 148 | getJpaController().destroy(current.getId()); |
| 149 | JsfUtil.addSuccessMessage(ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("NodeDeleted")); |
| 150 | } catch (Exception e) { |
| 151 | JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("org/ufcspa/simdecs/bn/Bundle").getString("PersistenceErrorOccured")); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | private void updateCurrentItem() { |
| 156 | int count = getJpaController().getNodeCount(); |
| 157 | if (selectedItemIndex >= count) { |
| 158 | // selected index cannot be bigger than number of items: |
| 159 | selectedItemIndex = count - 1; |
| 160 | // go to previous page if last page disappeared: |
| 161 | if (pagination.getPageFirstItem() >= count) { |
| 162 | pagination.previousPage(); |
| 163 | } |
| 164 | } |
| 165 | if (selectedItemIndex >= 0) { |
| 166 | current = getJpaController().findNodeEntities(1, selectedItemIndex).get(0); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | public DataModel getPaginatedItems() { |
| 171 | if (items == null) { |
| 172 | items = getPagination().createPageDataModel(); |
| 173 | } |
| 174 | return items; |
| 175 | } |
| 176 | |
| 177 | public DataModel getItems() { |
| 178 | if (items == null) { |
| 179 | getPagination(); |
| 180 | items = new ListDataModel(getJpaController().findNodeEntities()); |
| 181 | } |
| 182 | return items; |
| 183 | } |
| 184 | |
| 185 | public void recreateModel() { |
| 186 | items = null; |
| 187 | } |
| 188 | |
| 189 | private void recreatePagination() { |
| 190 | pagination = null; |
| 191 | } |
| 192 | |
| 193 | public String next() { |
| 194 | getPagination().nextPage(); |
| 195 | recreateModel(); |
| 196 | return "List"; |
| 197 | } |
| 198 | |
| 199 | public String previous() { |
| 200 | getPagination().previousPage(); |
| 201 | recreateModel(); |
| 202 | return "List"; |
| 203 | } |
| 204 | |
| 205 | public SelectItem[] getItemsAvailableSelectMany() { |
| 206 | return JsfUtil.getSelectItems(getJpaController().findNodeEntities(), false); |
| 207 | } |
| 208 | |
| 209 | public SelectItem[] getItemsAvailableSelectOne() { |
| 210 | return JsfUtil.getSelectItems(getJpaController().findNodeEntities(), true); |
| 211 | } |
| 212 | |
| 213 | @FacesConverter(forClass = Node.class) |
| 214 | public static class NodeControllerConverter implements Converter { |
| 215 | |
| 216 | public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { |
| 217 | if (value == null || value.length() == 0) { |
| 218 | return null; |
| 219 | } |
| 220 | NodeController controller = (NodeController) facesContext.getApplication().getELResolver(). |
| 221 | getValue(facesContext.getELContext(), null, "nodeController"); |
| 222 | return controller.getJpaController().findNode(getKey(value)); |
| 223 | } |
| 224 | |
| 225 | java.lang.Long getKey(String value) { |
| 226 | java.lang.Long key; |
| 227 | key = Long.valueOf(value); |
| 228 | return key; |
| 229 | } |
| 230 | |
| 231 | String getStringKey(java.lang.Long value) { |
| 232 | StringBuffer sb = new StringBuffer(); |
| 233 | sb.append(value); |
| 234 | return sb.toString(); |
| 235 | } |
| 236 | |
| 237 | public String getAsString(FacesContext facesContext, UIComponent component, Object object) { |
| 238 | if (object == null) { |
| 239 | return null; |
| 240 | } |
| 241 | if (object instanceof Node) { |
| 242 | Node o = (Node) object; |
| 243 | return getStringKey(o.getId()); |
| 244 | } else { |
| 245 | throw new IllegalArgumentException("object " + object + " is of type " + object.getClass().getName() + "; expected type: " + NodeController.class.getName()); |
| 246 | } |
| 247 | } |
| 248 | } |
| 249 | } |