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// $Id$
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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.common;
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import java.io.FileNotFoundException;
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import java.net.URI;
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import java.util.ArrayList;
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import java.util.HashMap;
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import org.apache.log4j.Logger;
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import org.apache.poi.hssf.usermodel.HSSFCell;
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import org.apache.poi.hssf.usermodel.HSSFRow;
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import org.apache.poi.hssf.usermodel.HSSFSheet;
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import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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import org.apache.poi.poifs.filesystem.POIFSFileSystem;
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/**
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* @author n.hoffmann
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* @created 18.11.2008
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* @version 1.0
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*/
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public class ExcelUtils {
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private static final Logger logger = Logger.getLogger(ExcelUtils.class);
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/** Reads all rows of an Excel worksheet */
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public static ArrayList<HashMap<String, String>> parseXLS(URI uri) throws FileNotFoundException {
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return parseXLS(uri, null);
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}
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/** Reads all rows of an Excel worksheet */
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public static ArrayList<HashMap<String, String>> parseXLS(URI uri, String worksheetName) throws FileNotFoundException {
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ArrayList<HashMap<String, String>> recordList = new ArrayList<HashMap<String, String>>();
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try {
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POIFSFileSystem fs = new POIFSFileSystem(UriUtils.getInputStream(uri));
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HSSFWorkbook wb = new HSSFWorkbook(fs);
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HSSFSheet sheet;
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if (worksheetName == null){
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sheet = wb.getSheetAt(0);
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}else{
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sheet = wb.getSheet(worksheetName);
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}
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HSSFRow row;
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HSSFCell cell;
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int rows; // No of rows
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rows = sheet.getPhysicalNumberOfRows();
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if(logger.isDebugEnabled()) { logger.debug("Number of rows: " + rows); }
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int cols = 0; // No of columns
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int tmp = 0;
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// This trick ensures that we get the data properly even if it doesn't start from first few rows
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for(int i = 0; i < 10 || i < rows; i++) {
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row = sheet.getRow(i);
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if(row != null) {
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tmp = sheet.getRow(i).getPhysicalNumberOfCells();
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if(tmp > cols){
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cols = tmp;
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}
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}
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}
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ArrayList<String> columns = new ArrayList<String>();
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row = sheet.getRow(0);
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for (int c = 0; c < cols; c++){
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cell = row.getCell(c);
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if(cell != null) {
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columns.add(cell.toString());
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if(logger.isDebugEnabled()) { logger.debug("Cell #" + c + ": " + cell.toString()); }
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} else {
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if(logger.isDebugEnabled()) { logger.debug("Cell #" + c + " is null"); }
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}
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}
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for(int r = 1; r < rows; r++) {
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row = sheet.getRow(r);
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HashMap<String, String> headers = new HashMap<String, String>();
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boolean notEmpty = false;
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for (int j = 0; j<row.getLastCellNum(); j++){
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if (row.getCell(j) != null){
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notEmpty = true;
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}
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}
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if(row != null && notEmpty) {
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for(int c = 0; c < cols; c++) {
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cell = row.getCell((short)c);
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if(cell != null) {
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if (c >= columns.size()){
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logger.warn("Cell has no header. There are only " + columns.size() + " headers but more not-null cells in approx. row " + row.getRowNum() + ". Cell is neglected.");
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}else{
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if(logger.isDebugEnabled()) { logger.debug("Cell #" + c + ": " + cell.toString()); }
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headers.put(columns.get(c), cell.toString());
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}
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} else {
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if(logger.isDebugEnabled()) { logger.debug("Cell #" + c + " is null"); }
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}
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}
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}
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recordList.add(headers);
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}
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} catch(FileNotFoundException fne) {
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throw new FileNotFoundException(uri.toString());
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} catch(Exception ioe) {
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logger.error("Error reading the Excel file.");
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ioe.printStackTrace();
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}
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return recordList;
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}
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}
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