/base/src/org/adempiere/impexp/AbstractExcelExporter.java

/******************************************************************************

 * Product: Adempiere ERP & CRM Smart Business Solution                       *

 * Copyright (C) 2008 SC ARHIPAC SERVICE SRL. All Rights Reserved.            *

 * This program is free software; you can redistribute it and/or modify it    *

 * under the terms version 2 of the GNU General Public License as published   *

 * by the Free Software Foundation. This program is distributed in the hope   *

 * that it will be useful, but WITHOUT ANY WARRANTY; without even the implied *

 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.           *

 * See the GNU General Public License for more details.                       *

 * You should have received a copy of the GNU General Public License along    *

 * with this program; if not, write to the Free Software Foundation, Inc.,    *

 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.                     *

 *****************************************************************************/

package org.adempiere.impexp;



import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStream;

import java.sql.Timestamp;

import java.text.DecimalFormat;

import java.text.NumberFormat;

import java.util.HashMap;

import java.util.Properties;

import java.util.logging.Level;



import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFDataFormat;

import org.apache.poi.hssf.usermodel.HSSFFont;

import org.apache.poi.hssf.usermodel.HSSFFooter;

import org.apache.poi.hssf.usermodel.HSSFHeader;

import org.apache.poi.hssf.usermodel.HSSFPrintSetup;

import org.apache.poi.hssf.usermodel.HSSFRichTextString;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.compiere.Adempiere;

import org.compiere.util.CLogMgt;

import org.compiere.util.CLogger;

import org.compiere.util.DisplayType;

import org.compiere.util.Env;

import org.compiere.util.Ini;

import org.compiere.util.Language;

import org.compiere.util.Msg;

import org.compiere.util.Util;



/**

 * Abstract MS Excel Format (xls) Exporter

 * @author Teo Sarca, SC ARHIPAC SERVICE SRL

 */

public abstract class AbstractExcelExporter

{

	/**

	 * Is the current Row a Function Row

	 * @return true if function row

	 */

	public abstract boolean isFunctionRow();

	

	/**

	 * Get Columns Count

	 * @return number of columns

	 */

	public abstract int getColumnCount();

	

	/**

	 * Get Rows Count

	 * @return number of rows

	 */

	public abstract int getRowCount();

	

	/**

	 * Set current row

	 * @param row row index

	 */

	protected abstract void setCurrentRow(int row);

	

	/**

	 * Check if column is printed (displayed) 

	 * @param col column index

	 * @return true if is visible

	 */

	public abstract boolean isColumnPrinted(int col);



	/**

	 * Get column header name

	 * @param col column index

	 * @return header name

	 */

	public abstract String getHeaderName(int col);

	

	/**

	 * Get cell display type (see {@link DisplayType})

	 * @param row row index

	 * @param col column index

	 * @return display type

	 */

	public abstract int getDisplayType(int row, int col);

	

	/**

	 * Get cell value

	 * @param row row index

	 * @param col column index

	 * @return cell value

	 */

	public abstract Object getValueAt(int row, int col);

	

	/**

	 * Check if there is a page break on given cell

	 * @param row row index

	 * @param col column index

	 * @return true if there is a page break

	 */

	public abstract boolean isPageBreak(int row, int col);



	/** Logger */

	protected final CLogger log = CLogger.getCLogger(getClass());

	//

	private HSSFWorkbook m_workbook;

	private HSSFDataFormat m_dataFormat;

	private HSSFFont m_fontHeader = null;

	private HSSFFont m_fontDefault = null;

	private Language m_lang = null;

	private int m_sheetCount = 0;

	//

	private int m_colSplit = 1;

	private int m_rowSplit = 1;

	/** Styles cache */

	private HashMap<String, HSSFCellStyle> m_styles = new HashMap<String, HSSFCellStyle>();



	public AbstractExcelExporter() {

		m_workbook = new HSSFWorkbook();

		m_dataFormat = m_workbook.createDataFormat();

	}



	protected Properties getCtx() {

		return Env.getCtx();

	}



	protected void setFreezePane(int colSplit, int rowSplit) {

		m_colSplit = colSplit;

		m_rowSplit = rowSplit;

	}



	private String fixString(String str)

	{

		// ms excel doesn't support UTF8 charset

		return Util.stripDiacritics(str);

	}



	protected Language getLanguage() {

		if (m_lang == null)

			m_lang = Env.getLanguage(getCtx());

		return m_lang;

	}



	private HSSFFont getFont(boolean isHeader) {

		HSSFFont font = null;

		if (isHeader) {

			if (m_fontHeader == null) {

				m_fontHeader = m_workbook.createFont();

				m_fontHeader.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

			}

			font = m_fontHeader;

		}

		else if (isFunctionRow()) {

			font = m_workbook.createFont();

			font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

			font.setItalic(true);

		}

		else {

			if (m_fontDefault == null) {

				m_fontDefault = m_workbook.createFont();

			}

			font = m_fontDefault;

		}

		return font;

	}



	/**

	 * Get Excel number format string by given {@link NumberFormat}

	 * @param df number format

	 * @param isHighlightNegativeNumbers highlight negative numbers using RED color

	 * @return number excel format string

	 */

	private String getFormatString(NumberFormat df, boolean isHighlightNegativeNumbers) {

		StringBuffer format = new StringBuffer();

		int integerDigitsMin = df.getMinimumIntegerDigits();

		int integerDigitsMax = df.getMaximumIntegerDigits();

		for (int i = 0; i < integerDigitsMax; i++) {

			if (i < integerDigitsMin)

				format.insert(0, "0");

			else

				format.insert(0, "#");

			if (i == 2) {

				format.insert(0, ",");

			}

		}

		int fractionDigitsMin = df.getMinimumFractionDigits();

		int fractionDigitsMax = df.getMaximumFractionDigits();

		for (int i = 0; i < fractionDigitsMax; i++) {

			if (i == 0)

				format.append(".");

			if (i < fractionDigitsMin)

				format.append("0");

			else

				format.append("#");

		}

		if (isHighlightNegativeNumbers) {

			String f = format.toString();

			format = new StringBuffer(f).append(";[RED]-").append(f);

		}

		//

		if (CLogMgt.isLevelFinest()) log.finest("NumberFormat: "+format);

		return format.toString();



	}



	private HSSFCellStyle getStyle(int row, int col) {

		int displayType = getDisplayType(row, col);

		String key = "cell-"+col+"-"+displayType;

		HSSFCellStyle cs = m_styles.get(key);

		if (cs == null) {

			boolean isHighlightNegativeNumbers = true;

			cs = m_workbook.createCellStyle();

			HSSFFont font = getFont(false);

			cs.setFont(font);

			// Border

			cs.setBorderLeft((short)1);

			cs.setBorderTop((short)1);

			cs.setBorderRight((short)1);

			cs.setBorderBottom((short)1);

			//

			if (DisplayType.isDate(displayType)) {

				cs.setDataFormat(m_dataFormat.getFormat("DD.MM.YYYY"));

			}

			else if (DisplayType.isNumeric(displayType)) {

				DecimalFormat df = DisplayType.getNumberFormat(displayType, getLanguage());

				String format = getFormatString(df, isHighlightNegativeNumbers);

				cs.setDataFormat(m_dataFormat.getFormat(format));

			}

			m_styles.put(key, cs);

		}

		return cs;

	}



	private HSSFCellStyle getHeaderStyle(int col)

	{

		String key = "header-"+col;

		HSSFCellStyle cs_header = m_styles.get(key);

		if (cs_header == null) {

			HSSFFont font_header = getFont(true);

			cs_header = m_workbook.createCellStyle();

			cs_header.setFont(font_header);

			cs_header.setBorderLeft((short)2);

			cs_header.setBorderTop((short)2);

			cs_header.setBorderRight((short)2);

			cs_header.setBorderBottom((short)2);

			cs_header.setDataFormat(HSSFDataFormat.getBuiltinFormat("text"));

			cs_header.setWrapText(true);

			m_styles.put(key, cs_header);

		}

		return cs_header;

	}



	private void fixColumnWidth(HSSFSheet sheet, int lastColumnIndex)

	{

		for (short colnum = 0; colnum < lastColumnIndex; colnum++)

		{

			sheet.autoSizeColumn(colnum);

		}

	}



	private void closeTableSheet(HSSFSheet prevSheet, String prevSheetName, int colCount)

	{

		if (prevSheet == null)

			return;

		//

		fixColumnWidth(prevSheet, colCount);

		if (m_colSplit >= 0 || m_rowSplit >= 0)

			prevSheet.createFreezePane(m_colSplit >= 0 ? m_colSplit : 0, m_rowSplit >= 0 ? m_rowSplit : 0);

		if (!Util.isEmpty(prevSheetName, true) && m_sheetCount > 0) {

			int prevSheetIndex = m_sheetCount - 1;

			try {

				m_workbook.setSheetName(prevSheetIndex, prevSheetName);

			}

			catch (Exception e) {

				log.log(Level.WARNING, "Error setting sheet "+prevSheetIndex+" name to "+prevSheetName, e);

			}

		}

	}

	private HSSFSheet createTableSheet()

	{

		HSSFSheet sheet= m_workbook.createSheet();

		formatPage(sheet);

		createHeaderFooter(sheet);

		createTableHeader(sheet);

		m_sheetCount++;

		//

		return sheet;

	}



	private void createTableHeader(HSSFSheet sheet)

	{

		short colnumMax = 0;



		HSSFRow row = sheet.createRow(0);

		//	for all columns

		short colnum = 0;

		for (int col = 0; col < getColumnCount(); col++)

		{

			if (colnum > colnumMax)

				colnumMax = colnum;

			//

			if (isColumnPrinted(col))

			{

				HSSFCell cell = row.createCell(colnum);

				//	header row

				HSSFCellStyle style = getHeaderStyle(col);

				cell.setCellStyle(style);

				String str = fixString(getHeaderName(col));

				cell.setCellValue(new HSSFRichTextString(str));

				colnum++;

			}	//	printed

		}	//	for all columns

//		m_workbook.setRepeatingRowsAndColumns(m_sheetCount, 0, 0, 0, 0);

	}



	protected void createHeaderFooter(HSSFSheet sheet)

	{

		// Sheet Header

		HSSFHeader header = sheet.getHeader();

		header.setRight(HSSFHeader.page()+ " / "+HSSFHeader.numPages());

		// Sheet Footer

		HSSFFooter footer = sheet.getFooter();

		footer.setLeft(Adempiere.ADEMPIERE_R);

		footer.setCenter(Env.getHeader(getCtx(), 0));

		Timestamp now = new Timestamp(System.currentTimeMillis());

		footer.setRight(DisplayType.getDateFormat(DisplayType.DateTime, getLanguage()).format(now));

	}



	protected void formatPage(HSSFSheet sheet)

	{

		sheet.setFitToPage(true);

		// Print Setup

		HSSFPrintSetup ps = sheet.getPrintSetup();

		ps.setFitWidth((short)1);

		ps.setNoColor(true);

		ps.setPaperSize(HSSFPrintSetup.A4_PAPERSIZE);

		ps.setLandscape(false);

	}



	/**

	 * Export to given stream

	 * @param out

	 * @throws Exception

	 */

	private void export(OutputStream out)

	throws Exception

	{

		HSSFSheet sheet= createTableSheet();

		String sheetName = null;

		//

		short colnumMax = 0;

		for (int rownum = 0, xls_rownum = 1; rownum < getRowCount(); rownum++, xls_rownum++)

		{

			setCurrentRow(rownum);



			boolean isPageBreak = false;

			HSSFRow row = sheet.createRow(xls_rownum);

			//	for all columns

			short colnum = 0;

			for (int col = 0; col < getColumnCount(); col++)

			{

				if (colnum > colnumMax)

					colnumMax = colnum;

				//

				if (isColumnPrinted(col))

				{

					HSSFCell cell = row.createCell(colnum);

					cell.setEncoding(HSSFCell.ENCODING_UTF_16); // Bug-2017673 - Export Report as Excel - Bad Encoding

					

					// line row

					Object obj = getValueAt(rownum, col);

					int displayType = getDisplayType(rownum, col);

					if (obj == null)

						;

					else if (DisplayType.isDate(displayType)) {

						Timestamp value = (Timestamp)obj;

						cell.setCellValue(value);

					}

					else if (DisplayType.isNumeric(displayType)) {

						double value = 0;

						if (obj instanceof Number) {

							value = ((Number)obj).doubleValue();

						}

						cell.setCellValue(value);

					}

					else if (DisplayType.YesNo == displayType) {

						boolean value = false;

						if (obj instanceof Boolean)

							value = (Boolean)obj;

						else

							value = "Y".equals(obj);

						cell.setCellValue(new HSSFRichTextString(Msg.getMsg(getLanguage(), value == true ? "Y" : "N")));

					}

					else {

						String value = fixString(obj.toString());	//	formatted

						cell.setCellValue(new HSSFRichTextString(value));

					}

					//

					HSSFCellStyle style = getStyle(rownum, col);

					cell.setCellStyle(style);

					// Page break

					if (isPageBreak(rownum, col)) {

						isPageBreak = true;

						sheetName = fixString(cell.getRichStringCellValue().getString());

					}

					//

					colnum++;

				}	//	printed

			}	//	for all columns

			//

			// Page Break

			if (isPageBreak) {

				closeTableSheet(sheet, sheetName, colnumMax);

				sheet = createTableSheet();

				xls_rownum = 0;

				isPageBreak = false;

			}

		}	//	for all rows

		closeTableSheet(sheet, sheetName, colnumMax);

		//

		m_workbook.write(out);

		out.close();

		//

		// Workbook Info

		if (CLogMgt.isLevelFine()) {

			log.fine("Sheets #"+m_sheetCount);

			log.fine("Styles used #"+m_styles.size());

		}

	}



	/**

	 * Export to file

	 * @param file

	 * @param language reporting language

	 * @throws Exception

	 */

	public void export(File file, Language language)

	throws Exception

	{

		export(file, language, true);

	}



	/**

	 * Export to file

	 * @param file

	 * @param language reporting language

	 * @param autoOpen auto open file after generated

	 * @throws Exception

	 */

	public void export(File file, Language language, boolean autoOpen)

	throws Exception

	{

		m_lang = language;

		if (file == null)

			file = File.createTempFile("Report_", ".xls");

		FileOutputStream out = new FileOutputStream(file);

		export(out);

		if (autoOpen && Ini.isClient())

			Env.startBrowser(file.toURI().toString());

	}

}