org.mifos.dmt.excel.cleanup.PurgeEmptyRows.java Source code

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Here is the source code for org.mifos.dmt.excel.cleanup.PurgeEmptyRows.java

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/*
 * Copyright (c) 2011-2015 SunGard Global Services, Bangalore
 * All rights reserved.
 *
 * 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.
 *
 * See also http://www.apache.org/licenses/LICENSE-2.0.html for an
 * explanation of the license and how it is applied.
 */

package org.mifos.dmt.excel.cleanup;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.mifos.dmt.logging.DMTLogger;
import org.mifos.dmt.util.DMTException;

public class PurgeEmptyRows {
    /*
     * EOF needs to be set on every sheet 1st col so that it can be stripped 
     */
    private static final DMTLogger logger = (DMTLogger) DMTLogger.getLogger(PurgeEmptyRows.class.getName());
    private Workbook workbook;

    public PurgeEmptyRows(Workbook workbook) {
        this.workbook = workbook;
    }

    public Workbook processEmptyRows() throws DMTException {
        for (int j = 1; j <= (workbook.getNumberOfSheets() - 1); j++) {
            Sheet sheet = workbook.getSheetAt(j);
            int targetRow = -1;
            for (int i = 0; i <= sheet.getLastRowNum(); i++) {
                Row row = sheet.getRow(i);
                if (row == null)
                    continue;
                Cell cell = row.getCell(0);
                if (cell == null)
                    continue;
                String val = cell.toString();
                if (val.equals("EOF")) {
                    targetRow = i;
                }
            }
            if (targetRow == -1) {
                logger.error("EOF value missing @ " + sheet.getSheetName());
                throw new DMTException("EOF value missing @ " + sheet.getSheetName());
            }
            cleanUpSheet(sheet, targetRow, sheet.getLastRowNum());
        }
        return workbook;
    }

    private void cleanUpSheet(Sheet sheet, int targetRow, int lastRowNum) {
        logger.info(("sheet " + sheet.getSheetName() + " processed with " + targetRow + " rows."));
        for (int i = targetRow; i <= lastRowNum; i++) {
            Row row = sheet.getRow(i);
            if (row == null)
                continue;
            sheet.removeRow(row);

        }

    }

}