org.wildfly.security.auth.callback.CallbackUtil Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
The newest version!
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.wildfly.security.auth.callback;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.UnsupportedCallbackException;
/**
* Helper utility methods for callback handlers.
*
* @author David M. Lloyd
*/
public final class CallbackUtil {
private CallbackUtil() {
}
/**
* Determine whether a callback is optional.
*
* @param callback the callback
* @return {@code true} if it is optional, {@code false} if it is not optional or optionality could not be determined
*/
public static boolean isOptional(Callback callback) {
return callback instanceof ExtendedCallback && ((ExtendedCallback) callback).isOptional();
}
/**
* A utility to handle a callback which is unsupported. Optional callbacks will be ignored, otherwise the
* exception will be thrown. In the case of optional callbacks, this method will return.
*
* @param callback the callback which is not supported
* @throws UnsupportedCallbackException if the callback is not optional
*/
public static void unsupported(Callback callback) throws UnsupportedCallbackException {
if (! isOptional(callback)) {
throw new FastUnsupportedCallbackException(callback);
}
}
}