| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.myfaces.tobago.internal.util; |
| |
| import org.apache.myfaces.tobago.component.Attributes; |
| import org.apache.myfaces.tobago.component.RendererTypes; |
| import org.apache.myfaces.tobago.internal.component.AbstractUICommand; |
| import org.apache.myfaces.tobago.internal.component.AbstractUISheet; |
| import org.apache.myfaces.tobago.model.SheetState; |
| import org.apache.myfaces.tobago.util.MessageUtils; |
| import org.apache.myfaces.tobago.util.ValueExpressionComparator; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.el.ValueExpression; |
| import javax.faces.application.FacesMessage; |
| import javax.faces.component.UIColumn; |
| import javax.faces.component.UICommand; |
| import javax.faces.component.UIComponent; |
| import javax.faces.component.UIInput; |
| import javax.faces.component.UIOutput; |
| import javax.faces.component.UISelectBoolean; |
| import javax.faces.component.UISelectMany; |
| import javax.faces.component.UISelectOne; |
| import javax.faces.context.FacesContext; |
| import javax.faces.model.DataModel; |
| import java.lang.invoke.MethodHandles; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| public class SortingUtils { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| private SortingUtils() { |
| } |
| |
| public static void sort(final AbstractUISheet sheet, final Comparator comparator) { |
| final FacesContext facesContext = FacesContext.getCurrentInstance(); |
| Object data = sheet.getValue(); |
| if (data instanceof DataModel) { |
| data = ((DataModel) data).getWrappedData(); |
| } |
| final SheetState sheetState = sheet.getSheetState(facesContext); |
| |
| final String sortedColumnId = sheetState.getSortedColumnId(); |
| LOG.debug("sorterId = '{}'", sortedColumnId); |
| |
| boolean success = false; |
| if (sortedColumnId != null) { |
| final UIColumn column = (UIColumn) sheet.findComponent(sortedColumnId); |
| if (column != null) { |
| success = sort(facesContext, sheet, data, column, sheetState, comparator); |
| } else { |
| LOG.error("No column to sort found, sorterId = '{}'!", sortedColumnId); |
| addNotSortableMessage(facesContext, null); |
| } |
| } else { |
| LOG.debug("No sorterId!"); |
| } |
| |
| if (!success) { |
| sheetState.resetSortState(); |
| } |
| } |
| |
| private static boolean sort( |
| final FacesContext facesContext, final AbstractUISheet sheet, final Object data, final UIColumn column, |
| final SheetState sheetState, Comparator comparator) { |
| |
| final Comparator actualComparator; |
| |
| if (data instanceof List || data instanceof Object[]) { |
| try { |
| final UIComponent child = getFirstSortableChild(column.getChildren()); |
| if (child != null) { |
| final boolean descending = !sheetState.isAscending(); |
| final String attribute = (child instanceof AbstractUICommand ? Attributes.label : Attributes.value).getName(); |
| final ValueExpression expression = child.getValueExpression(attribute); |
| if (expression != null) { |
| final String var = sheet.getVar(); |
| if (var == null) { |
| LOG.error("No sorting performed. Property var of sheet is not set!"); |
| addNotSortableMessage(facesContext, column); |
| return false; |
| } |
| actualComparator = new ValueExpressionComparator(facesContext, var, expression, descending, comparator); |
| } else { |
| LOG.error("No sorting performed, because no expression found for " |
| + "attribute '{}' in component '{}' with id='{}'! You may check the type of the component!", |
| attribute, child.getClass().getName(), child.getClientId()); |
| addNotSortableMessage(facesContext, column); |
| return false; |
| } |
| } else { |
| LOG.error("No sorting performed. Value is not instanceof List or Object[]!"); |
| addNotSortableMessage(facesContext, column); |
| return false; |
| } |
| } catch (final Exception e) { |
| LOG.error("Error while extracting sortMethod :" + e.getMessage(), e); |
| addNotSortableMessage(facesContext, column); |
| return false; |
| } |
| |
| // memorize selected rows |
| List<Object> selectedDataRows = null; |
| if (sheetState.getSelectedRows().size() > 0) { |
| selectedDataRows = new ArrayList<>(sheetState.getSelectedRows().size()); |
| Object dataRow; |
| for (final Integer index : sheetState.getSelectedRows()) { |
| if (data instanceof List) { |
| dataRow = ((List) data).get(index); |
| } else { |
| dataRow = ((Object[]) data)[index]; |
| } |
| selectedDataRows.add(dataRow); |
| } |
| } |
| |
| // do sorting |
| if (data instanceof List) { |
| Collections.sort((List) data, actualComparator); |
| } else { // value is instanceof Object[] |
| Arrays.sort((Object[]) data, actualComparator); |
| } |
| |
| // restore selected rows |
| if (selectedDataRows != null) { |
| sheetState.getSelectedRows().clear(); |
| for (final Object dataRow : selectedDataRows) { |
| int index = -1; |
| if (data instanceof List) { |
| for (int i = 0; i < ((List) data).size() && index < 0; i++) { |
| if (dataRow == ((List) data).get(i)) { |
| index = i; |
| } |
| } |
| } else { |
| for (int i = 0; i < ((Object[]) data).length && index < 0; i++) { |
| if (dataRow == ((Object[]) data)[i]) { |
| index = i; |
| } |
| } |
| } |
| if (index >= 0) { |
| sheetState.getSelectedRows().add(index); |
| } |
| } |
| } |
| |
| } else { // DataModel?, ResultSet, Result or Object |
| LOG.warn("Sorting not supported for type '{}'.", data != null ? data.getClass().toString() : "null"); |
| addNotSortableMessage(facesContext, column); |
| return false; |
| } |
| return true; |
| } |
| |
| private static void addNotSortableMessage(final FacesContext facesContext, final UIColumn column) { |
| if (column != null) { |
| final String label = MessageUtils.getLabel(facesContext, column); |
| facesContext.addMessage(column.getClientId(facesContext), |
| MessageUtils.getMessage( |
| facesContext, FacesMessage.SEVERITY_WARN, AbstractUISheet.NOT_SORTABLE_COL_MESSAGE_ID, label)); |
| } else { |
| facesContext.addMessage(null, |
| MessageUtils.getMessage( |
| facesContext, FacesMessage.SEVERITY_WARN, AbstractUISheet.NOT_SORTABLE_MESSAGE_ID)); |
| } |
| } |
| |
| private static UIComponent getFirstSortableChild(final List<UIComponent> children) { |
| UIComponent result = null; |
| |
| for (UIComponent child : children) { |
| result = child; |
| if (child instanceof UISelectMany |
| || child instanceof UISelectOne |
| || child instanceof UISelectBoolean |
| || (child instanceof AbstractUICommand && child.getChildren().isEmpty()) |
| || (child instanceof UIInput && RendererTypes.HIDDEN.equals(child.getRendererType()))) { |
| continue; |
| // look for a better component if any |
| } |
| if (child instanceof UIOutput) { |
| break; |
| } |
| if (child instanceof UICommand |
| || child instanceof javax.faces.component.UIPanel) { |
| child = getFirstSortableChild(child.getChildren()); |
| if (child instanceof UIOutput) { |
| break; |
| } |
| } |
| } |
| return result; |
| } |
| } |