org.directwebremoting.convert.EnumConverter Maven / Gradle / Ivy
package org.directwebremoting.convert;
import java.lang.reflect.Method;
import org.directwebremoting.ConversionException;
import org.directwebremoting.extend.AbstractConverter;
import org.directwebremoting.extend.InboundVariable;
import org.directwebremoting.extend.NonNestedOutboundVariable;
import org.directwebremoting.extend.OutboundContext;
import org.directwebremoting.extend.OutboundVariable;
/**
* Converter for Enums
* @author Joe Walker [joe at getahead dot ltd dot uk]
*/
public class EnumConverter extends AbstractConverter
{
/* (non-Javadoc)
* @see org.directwebremoting.extend.Converter#convertInbound(java.lang.Class, org.directwebremoting.extend.InboundVariable, org.directwebremoting.extend.InboundContext)
*/
public Object convertInbound(Class> paramType, InboundVariable data) throws ConversionException
{
if (data.isNull())
{
return null;
}
String value = data.urlDecode();
try
{
Method getter = paramType.getMethod("valueOf", String.class);
Object reply = getter.invoke(paramType, value);
if (reply == null)
{
throw new ConversionException(paramType);
}
return reply;
}
catch (NoSuchMethodException ex)
{
// We would like to have done: if (!paramType.isEnum())
// But this catch block has the same effect
throw new ConversionException(paramType);
}
catch (Exception ex)
{
throw new ConversionException(paramType, ex);
}
}
/* (non-Javadoc)
* @see org.directwebremoting.extend.Converter#convertOutbound(java.lang.Object, org.directwebremoting.extend.OutboundContext)
*/
public OutboundVariable convertOutbound(Object data, OutboundContext outctx)
{
return new NonNestedOutboundVariable('"' + ((Enum>) data).name() + '"');
}
}
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