org.apache.poi.ss.usermodel.contrib.CellUtil Maven / Gradle / Ivy
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package org.apache.poi.ss.usermodel.contrib;
import java.util.HashMap;
import java.util.Map;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
/**
* Various utility functions that make working with a cells and rows easier. The various methods
* that deal with style's allow you to create your CellStyles as you need them. When you apply a
* style change to a cell, the code will attempt to see if a style already exists that meets your
* needs. If not, then it will create a new style. This is to prevent creating too many styles.
* there is an upper limit in Excel on the number of styles that can be supported.
*
*@author Eric Pugh [email protected]
*@author (secondary) Avinash Kewalramani [email protected]
*/
public final class CellUtil {
public static final String ALIGNMENT = "alignment";
public static final String BORDER_BOTTOM = "borderBottom";
public static final String BORDER_LEFT = "borderLeft";
public static final String BORDER_RIGHT = "borderRight";
public static final String BORDER_TOP = "borderTop";
public static final String BOTTOM_BORDER_COLOR = "bottomBorderColor";
public static final String DATA_FORMAT = "dataFormat";
public static final String FILL_BACKGROUND_COLOR = "fillBackgroundColor";
public static final String FILL_FOREGROUND_COLOR = "fillForegroundColor";
public static final String FILL_PATTERN = "fillPattern";
public static final String FONT = "font";
public static final String HIDDEN = "hidden";
public static final String INDENTION = "indention";
public static final String LEFT_BORDER_COLOR = "leftBorderColor";
public static final String LOCKED = "locked";
public static final String RIGHT_BORDER_COLOR = "rightBorderColor";
public static final String ROTATION = "rotation";
public static final String TOP_BORDER_COLOR = "topBorderColor";
public static final String VERTICAL_ALIGNMENT = "verticalAlignment";
public static final String WRAP_TEXT = "wrapText";
private static UnicodeMapping unicodeMappings[];
private static final class UnicodeMapping {
public final String entityName;
public final String resolvedValue;
public UnicodeMapping(String pEntityName, String pResolvedValue) {
entityName = "&" + pEntityName + ";";
resolvedValue = pResolvedValue;
}
}
private CellUtil() {
// no instances of this class
}
/**
* Get a row from the spreadsheet, and create it if it doesn't exist.
*
*@param rowIndex The 0 based row number
*@param sheet The sheet that the row is part of.
*@return The row indicated by the rowCounter
*/
public static Row getRow(int rowIndex, Sheet sheet) {
Row row = sheet.getRow(rowIndex);
if (row == null) {
row = sheet.createRow(rowIndex);
}
return row;
}
/**
* Get a specific cell from a row. If the cell doesn't exist, then create it.
*
*@param row The row that the cell is part of
*@param columnIndex The column index that the cell is in.
*@return The cell indicated by the column.
*/
public static Cell getCell(Row row, int columnIndex) {
Cell cell = row.getCell(columnIndex);
if (cell == null) {
cell = row.createCell(columnIndex);
}
return cell;
}
/**
* Creates a cell, gives it a value, and applies a style if provided
*
* @param row the row to create the cell in
* @param column the column index to create the cell in
* @param value The value of the cell
* @param style If the style is not null, then set
* @return A new Cell
*/
public static Cell createCell(Row row, int column, String value, CellStyle style) {
Cell cell = getCell(row, column);
cell.setCellValue(cell.getRow().getSheet().getWorkbook().getCreationHelper()
.createRichTextString(value));
if (style != null) {
cell.setCellStyle(style);
}
return cell;
}
/**
* Create a cell, and give it a value.
*
*@param row the row to create the cell in
*@param column the column index to create the cell in
*@param value The value of the cell
*@return A new Cell.
*/
public static Cell createCell(Row row, int column, String value) {
return createCell(row, column, value, null);
}
/**
* Take a cell, and align it.
*
*@param cell the cell to set the alignment for
*@param workbook The workbook that is being worked with.
*@param align the column alignment to use.
*
* @see CellStyle for alignment options
*/
public static void setAlignment(Cell cell, Workbook workbook, short align) {
setCellStyleProperty(cell, workbook, ALIGNMENT, Short.valueOf(align));
}
/**
* Take a cell, and apply a font to it
*
*@param cell the cell to set the alignment for
*@param workbook The workbook that is being worked with.
*@param font The Font that you want to set...
*/
public static void setFont(Cell cell, Workbook workbook, Font font) {
setCellStyleProperty(cell, workbook, FONT, font);
}
/**
* This method attempt to find an already existing CellStyle that matches what you want the
* style to be. If it does not find the style, then it creates a new one. If it does create a
* new one, then it applies the propertyName and propertyValue to the style. This is necessary
* because Excel has an upper limit on the number of Styles that it supports.
*
*@param workbook The workbook that is being worked with.
*@param propertyName The name of the property that is to be changed.
*@param propertyValue The value of the property that is to be changed.
*@param cell The cell that needs it's style changes
*/
public static void setCellStyleProperty(Cell cell, Workbook workbook, String propertyName,
Object propertyValue) {
CellStyle originalStyle = cell.getCellStyle();
CellStyle newStyle = null;
Map values = getFormatProperties(originalStyle);
values.put(propertyName, propertyValue);
// index seems like what index the cellstyle is in the list of styles for a workbook.
// not good to compare on!
short numberCellStyles = workbook.getNumCellStyles();
for (short i = 0; i < numberCellStyles; i++) {
CellStyle wbStyle = workbook.getCellStyleAt(i);
Map wbStyleMap = getFormatProperties(wbStyle);
if (wbStyleMap.equals(values)) {
newStyle = wbStyle;
break;
}
}
if (newStyle == null) {
newStyle = workbook.createCellStyle();
setFormatProperties(newStyle, workbook, values);
}
cell.setCellStyle(newStyle);
}
/**
* Returns a map containing the format properties of the given cell style.
*
* @param style cell style
* @return map of format properties (String -> Object)
* @see #setFormatProperties(CellStyle, Map)
*/
private static Map getFormatProperties(CellStyle style) {
Map properties = new HashMap();
putShort(properties, ALIGNMENT, style.getAlignment());
putShort(properties, BORDER_BOTTOM, style.getBorderBottom());
putShort(properties, BORDER_LEFT, style.getBorderLeft());
putShort(properties, BORDER_RIGHT, style.getBorderRight());
putShort(properties, BORDER_TOP, style.getBorderTop());
putShort(properties, BOTTOM_BORDER_COLOR, style.getBottomBorderColor());
putShort(properties, DATA_FORMAT, style.getDataFormat());
putShort(properties, FILL_BACKGROUND_COLOR, style.getFillBackgroundColor());
putShort(properties, FILL_FOREGROUND_COLOR, style.getFillForegroundColor());
putShort(properties, FILL_PATTERN, style.getFillPattern());
putShort(properties, FONT, style.getFontIndex());
putBoolean(properties, HIDDEN, style.getHidden());
putShort(properties, INDENTION, style.getIndention());
putShort(properties, LEFT_BORDER_COLOR, style.getLeftBorderColor());
putBoolean(properties, LOCKED, style.getLocked());
putShort(properties, RIGHT_BORDER_COLOR, style.getRightBorderColor());
putShort(properties, ROTATION, style.getRotation());
putShort(properties, TOP_BORDER_COLOR, style.getTopBorderColor());
putShort(properties, VERTICAL_ALIGNMENT, style.getVerticalAlignment());
putBoolean(properties, WRAP_TEXT, style.getWrapText());
return properties;
}
/**
* Sets the format properties of the given style based on the given map.
*
* @param style cell style
* @param workbook parent workbook
* @param properties map of format properties (String -> Object)
* @see #getFormatProperties(CellStyle)
*/
private static void setFormatProperties(CellStyle style, Workbook workbook, Map properties) {
style.setAlignment(getShort(properties, ALIGNMENT));
style.setBorderBottom(getShort(properties, BORDER_BOTTOM));
style.setBorderLeft(getShort(properties, BORDER_LEFT));
style.setBorderRight(getShort(properties, BORDER_RIGHT));
style.setBorderTop(getShort(properties, BORDER_TOP));
style.setBottomBorderColor(getShort(properties, BOTTOM_BORDER_COLOR));
style.setDataFormat(getShort(properties, DATA_FORMAT));
style.setFillBackgroundColor(getShort(properties, FILL_BACKGROUND_COLOR));
style.setFillForegroundColor(getShort(properties, FILL_FOREGROUND_COLOR));
style.setFillPattern(getShort(properties, FILL_PATTERN));
style.setFont(workbook.getFontAt(getShort(properties, FONT)));
style.setHidden(getBoolean(properties, HIDDEN));
style.setIndention(getShort(properties, INDENTION));
style.setLeftBorderColor(getShort(properties, LEFT_BORDER_COLOR));
style.setLocked(getBoolean(properties, LOCKED));
style.setRightBorderColor(getShort(properties, RIGHT_BORDER_COLOR));
style.setRotation(getShort(properties, ROTATION));
style.setTopBorderColor(getShort(properties, TOP_BORDER_COLOR));
style.setVerticalAlignment(getShort(properties, VERTICAL_ALIGNMENT));
style.setWrapText(getBoolean(properties, WRAP_TEXT));
}
/**
* Utility method that returns the named short value form the given map.
* @return zero if the property does not exist, or is not a {@link Short}.
*
* @param properties map of named properties (String -> Object)
* @param name property name
* @return property value, or zero
*/
private static short getShort(Map properties, String name) {
Object value = properties.get(name);
if (value instanceof Short) {
return ((Short) value).shortValue();
}
return 0;
}
/**
* Utility method that returns the named boolean value form the given map.
* @return false if the property does not exist, or is not a {@link Boolean}.
*
* @param properties map of properties (String -> Object)
* @param name property name
* @return property value, or false
*/
private static boolean getBoolean(Map properties, String name) {
Object value = properties.get(name);
if (value instanceof Boolean) {
return ((Boolean) value).booleanValue();
}
return false;
}
/**
* Utility method that puts the named short value to the given map.
*
* @param properties map of properties (String -> Object)
* @param name property name
* @param value property value
*/
private static void putShort(Map properties, String name, short value) {
properties.put(name, Short.valueOf(value));
}
/**
* Utility method that puts the named boolean value to the given map.
*
* @param properties map of properties (String -> Object)
* @param name property name
* @param value property value
*/
private static void putBoolean(Map properties, String name, boolean value) {
properties.put(name, Boolean.valueOf(value));
}
/**
* Looks for text in the cell that should be unicode, like α and provides the
* unicode version of it.
*
*@param cell The cell to check for unicode values
*@return translated to unicode
*/
public static Cell translateUnicodeValues(Cell cell) {
String s = cell.getRichStringCellValue().getString();
boolean foundUnicode = false;
String lowerCaseStr = s.toLowerCase();
for (int i = 0; i < unicodeMappings.length; i++) {
UnicodeMapping entry = unicodeMappings[i];
String key = entry.entityName;
if (lowerCaseStr.indexOf(key) != -1) {
s = s.replaceAll(key, entry.resolvedValue);
foundUnicode = true;
}
}
if (foundUnicode) {
cell.setCellValue(cell.getRow().getSheet().getWorkbook().getCreationHelper()
.createRichTextString(s));
}
return cell;
}
static {
unicodeMappings = new UnicodeMapping[] {
um("alpha", "\u03B1" ),
um("beta", "\u03B2" ),
um("gamma", "\u03B3" ),
um("delta", "\u03B4" ),
um("epsilon", "\u03B5" ),
um("zeta", "\u03B6" ),
um("eta", "\u03B7" ),
um("theta", "\u03B8" ),
um("iota", "\u03B9" ),
um("kappa", "\u03BA" ),
um("lambda", "\u03BB" ),
um("mu", "\u03BC" ),
um("nu", "\u03BD" ),
um("xi", "\u03BE" ),
um("omicron", "\u03BF" ),
};
}
private static UnicodeMapping um(String entityName, String resolvedValue) {
return new UnicodeMapping(entityName, resolvedValue);
}
}
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