package org.appfuse.util;
import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.beanutils.Converter;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.text.DecimalFormat;
import java.text.ParseException;
/**
* This class is converts a Double to a double-digit String
* (and vise-versa) by BeanUtils when copying properties.
*
* @author <a href="mailto:matt@raibledesigns.com">Matt Raible</a>
*/
public class CurrencyConverter implements Converter {
private final Log log = LogFactory.getLog(CurrencyConverter.class);
private DecimalFormat formatter = new DecimalFormat("###,###.00");
public void setDecimalFormatter(DecimalFormat df) {
this.formatter = df;
}
/**
* Convert a String to a Double and a Double to a String
*
* @param type the class type to output
* @param value the object to convert
* @return object the converted object (Double or String)
*/
public final Object convert(final Class type, final Object value) {
// for a null value, return null
if (value == null) {
return null;
} else {
if (value instanceof String) {
if (log.isDebugEnabled()) {
log.debug("value (" + value + ") instance of String");
}
try {
if (StringUtils.isBlank(String.valueOf(value))) {
return null;
}
if (log.isDebugEnabled()) {
log.debug("converting '" + value + "' to a decimal");
}
//formatter.setDecimalSeparatorAlwaysShown(true);
Number num = formatter.parse(String.valueOf(value));
return num.doubleValue();
} catch (ParseException pe) {
pe.printStackTrace();
}
} else if (value instanceof Double) {
if (log.isDebugEnabled()) {
log.debug("value (" + value + ") instance of Double");
log.debug("returning double: " + formatter.format(value));
}
return formatter.format(value);
}
}
throw new ConversionException("Could not convert " + value + " to " + type.getName() + "!");
}
}