/*
* $Id: NumericCellRenderer.java 471756 2006-11-06 15:01:43Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.struts2.components.table.renderer;
import java.text.DecimalFormat;
import org.apache.struts2.components.table.WebTable;
/**
*/
public class NumericCellRenderer extends AbstractCellRenderer {
DecimalFormat _formater = new DecimalFormat();
/**
* this is the format string that DecimalFormat would use.
*
* @see DecimalFormat
*/
String _formatString = null;
/**
* if set the is the color to use if Number is negative.
*/
String _negativeColor = null;
/**
* if set this is the color to render if number is positive
*/
String _positiveColor = null;
public NumericCellRenderer() {
super();
}
public String getCellValue(WebTable table, Object data, int row, int col) {
StringBuffer retVal = new StringBuffer(128);
if (data == null) {
return "";
}
if (data instanceof Number) {
double cellValue = ((Number) data).doubleValue();
if (cellValue >= 0) {
processNumber(retVal, _positiveColor, cellValue);
} else {
processNumber(retVal, _negativeColor, cellValue);
}
return retVal.toString();
}
return data.toString();
}
public void setFormatString(String format) {
_formatString = format;
_formater.applyPattern(_formatString);
}
public void setNegativeColor(String color) {
_negativeColor = color;
}
public void setPositiveColor(String color) {
_positiveColor = color;
}
protected void processNumber(StringBuffer buf, String color, double cellValue) {
if (color != null) {
buf.append(" <font color='").append(color).append("'>");
}
buf.append(_formater.format(cellValue));
if (color != null) {
buf.append("</font>");
}
}
}
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