| // Copyright 2008 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry5.grid; |
| |
| import java.util.List; |
| |
| /** |
| * Models the sorting applied to the a {@link org.apache.tapestry5.grid.GridDataSource}. |
| */ |
| public interface GridSortModel |
| { |
| /** |
| * Identifies how (or if) a column is sorted. |
| * |
| * @param columnId |
| * @return the sort for the indicated column or {@link org.apache.tapestry5.grid.ColumnSort#UNSORTED} if the column |
| * is not used for sorting |
| */ |
| ColumnSort getColumnSort(String columnId); |
| |
| /** |
| * Updates the column sort. The receiver determines how to handle the sort request. |
| * |
| * @param columnId property id of column to sort on |
| */ |
| void updateSort(String columnId); |
| |
| /** |
| * Returns a list of sort constraints, identifying which columns are sorted, and how. May return an empty list (but |
| * won't return null). |
| * |
| * @see org.apache.tapestry5.grid.GridDataSource#prepare(int, int, java.util.List) |
| */ |
| List<SortConstraint> getSortContraints(); |
| |
| void clear(); |
| } |