org.directwebremoting.convert
Class ServletConverter

java.lang.Object
  org.directwebremoting.extend.AbstractConverter
      org.directwebremoting.convert.ServletConverter

All Implemented Interfaces:

Converter

public class ServletConverter
extends AbstractConverter
implements Converter

A converter that magics up HTTP objects

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Constructor Summary

ServletConverter()

Method Summary

java.lang.Object	convertInbound(java.lang.Class<?> paramType, InboundVariable data) Attempt to coerce the data from a string to an Object.
OutboundVariable	convertOutbound(java.lang.Object data, OutboundContext outctx) Return a javascript string that defines the variable named varName to have the contents of the converted object data.

Methods inherited from class org.directwebremoting.extend.AbstractConverter

setConverterManager

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.directwebremoting.extend.Converter

setConverterManager

Constructor Detail

ServletConverter

public ServletConverter()

Method Detail

convertInbound

public java.lang.Object convertInbound(java.lang.Class<?> paramType,
                                       InboundVariable data)

Description copied from interface: Converter

Attempt to coerce the data from a string to an Object. If anything goes wrong with inbound conversion then we generally throw an exception because we are converting data from the untrusted Internet so we take the assumption that anything wrong is someone hacking.

Specified by:

convertInbound in interface Converter

Parameters:

paramType - The type to convert to

data - The data to convert

Returns:

The converted data, or null if the conversion was not possible

convertOutbound

public OutboundVariable convertOutbound(java.lang.Object data,
                                        OutboundContext outctx)

Description copied from interface: Converter

Return a javascript string that defines the variable named varName to have the contents of the converted object data.

In contrast to convertInbound() failures in converting data on the way out should not stop processing, and we should carry on if we can. Failures are probably down to some misconfiguration so as much information about the error as can be safely generated to console logs is good. In other words if you need to loop in outbound conversion then it might be a good idea to catch issues inside the loop, log, and carry on.

Specified by:

convertOutbound in interface Converter

Parameters:

data - The data to convert

outctx - A collection of objects already converted and the results

Returns:

The OutboundVariable that represents the data to convert