Hi,
I wrote a DisplaytagColumnDecorator implementation where the datatype of the
column value is a String instead of the corresponding properties datatype. So I
get a ClassCastException.
Any idea what I do wrong?
Here is my code:
-------- The Decorator ---------
package org.displaytag.decorator;
import java.text.DecimalFormat;
import java.util.Locale;
import javax.servlet.jsp.PageContext;
import org.displaytag.decorator.DisplaytagColumnDecorator;
import org.displaytag.exception.DecoratorException;
import org.displaytag.properties.MediaTypeEnum;
public class DisplaytagMoneyWrapper implements DisplaytagColumnDecorator {
private static String moneyToString(double wert) {
DecimalFormat decimalFormat = (DecimalFormat)
DecimalFormat.getInstance(Locale.GERMAN);
decimalFormat.applyPattern("#,###,##0.00");
String string = decimalFormat.format(round(wert));
return string;
}
private static double round(double wert) {
long longWert = Math.round(wert * 100);
double doubleWert = longWert;
doubleWert = doubleWert / 100;
return doubleWert;
}
public Object decorate(Object columnValue, PageContext pageContext,
MediaTypeEnum media) throws DecoratorException {
return columnValue != null ? moneyToString((Double) columnValue) :
moneyToString(0);
}
}
----------------------------------
-------- The Table ---------------
<div id="rechnungsausgaengeUebersicht" class="table">
<display:table name="${form.rechnungsausgaengeUebersicht}" id="row"
requestURIcontext="false"
requestURI="${pageContext.request.requestURI}"
export="true" pagesize="20" sort="list">
<display:setProperty name="export.pdf.filename"
value="rechnungsausgaenge-uebersicht.pdf" />
<display:setProperty name="export.csv" value="true"/>
<display:setProperty name="export.pdf" value="false"/>
<display:setProperty name="export.excel" value="true"/>
<display:setProperty name="export.xml" value="true"/>
... other columns ...
<display:column media="excel xml csv"
titleKey="rechnungsausgaenge.uebersicht.honorar"
autolink="true" paramId="honorar"
decorator="org.displaytag.decorator.DisplaytagMoneyWrapper">
${row.honorar}
</display:column>
<display:column media="html"
headerClass="honorar" paramId="honorar"
sortProperty="honorar" sortable="true"
titleKey="rechnungsausgaenge.uebersicht.honorar"
decorator="org.displaytag.decorator.DisplaytagMoneyWrapper">
<div class="honorar">${row.honorar}</div>
</display:column>
... other columns ...
</display:table>
</div>
----------------------------------
Thanks in advance.
Oemer
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