001/*
002 * Copyright 2008 The Kuali Foundation
003 * 
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 * 
008 * http://www.opensource.org/licenses/ecl2.php
009 * 
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.ole.sys.document.service.impl;
017
018import java.util.HashSet;
019import java.util.List;
020import java.util.Set;
021
022import org.kuali.ole.sys.document.service.AccountingLineTableTransformation;
023import org.kuali.ole.sys.document.web.AccountingLineTableCell;
024import org.kuali.ole.sys.document.web.AccountingLineTableRow;
025
026/**
027 * Rendering transformation which removes any empty cells and rows from a table
028 */
029public class RemoveEmptyCellsAndRowsRenderingTransformationImpl implements AccountingLineTableTransformation {
030
031    /**
032     * Removes any empty cells and rows from this table
033     * @param rows the table rows to render
034     */
035    public void transformRows(List<AccountingLineTableRow> rows) {
036        Set<AccountingLineTableRow> rowsToRemove = new HashSet<AccountingLineTableRow>();
037        for (AccountingLineTableRow row : rows) {
038            removeEmptyCells(row);
039            if (row.isEmpty()) {
040                rowsToRemove.add(row);
041            }
042        }
043        rows.removeAll(rowsToRemove);
044    }
045    
046    /**
047     * Removes all empty cells from a given row
048     * @param row the row to remove empty cells from
049     */
050    public void removeEmptyCells(AccountingLineTableRow row) {
051        Set<AccountingLineTableCell> cellsToRemove = new HashSet<AccountingLineTableCell>();
052        for (AccountingLineTableCell cell : row.getCells()) {
053            if (cell.isEmpty()) {
054                cellsToRemove.add(cell);
055            }
056        }
057        row.getCells().removeAll(cellsToRemove);
058    }
059}