RestEasy - Not Easy for Validation

After a Long time i am back to my Blog to post my findings on REST easy and Rest ful web services implementation practices.

Though my Preference is' Jersey ' i was in a position to select Resteasy for the implementation

The documentation explains about Decorators for Validation. it applies only for Marhsalling. for unmarshaling there are no decorators available in the framework.
Writing a New Decorator for unmarshaling is not an easy task.

So i used a Validator class from javax.xml.bind.* which worked perfectly.

But the Trick Here is you cannot Validate and let the framework bind on the same input Stream .so you need to clone the input stream ,one for validation and the other one for binding. (this binding will be done by Rest easy framework)

This worked really well.

Code to clone Input Stream

org.apache.commons.io.IOUtils;

private List cloneInputStream(InputStream iStream) {
List inArray = null;
List errorList = new ArrayList();
try {

if (iStream != null) {
String base = org.apache.commons.io.IOUtils.toString(iStream);
logger.debug("called cloneInputStream: input stream content -> {}",
base);
inArray = new ArrayList();
for (int i = 0;
i < APIConstants.INPUTSTREAM_CLONES; i++) {
inArray.add(IOUtils.toInputStream(base));
}
}
return inArray;
}
Please let me know if you have any questions.

Thanks
Premkumar