org.wildfly.security.sasl.util.FilterMechanismSaslServerFactory Maven / Gradle / Ivy
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* 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.sasl.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.function.Predicate;
import javax.security.auth.callback.CallbackHandler;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import javax.security.sasl.SaslServerFactory;
import org.wildfly.common.Assert;
/**
* A {@link SaslServerFactory} which filters available mechanisms (either inclusively or exclusively) from a delegate
* {@code SaslServerFactory}.
*
* @author David M. Lloyd
*/
public final class FilterMechanismSaslServerFactory extends AbstractDelegatingSaslServerFactory {
private final Predicate predicate;
/**
* Construct a new instance.
*
* @param delegate the factory to delegate to
* @param predicate the mechanism name predicate
*/
public FilterMechanismSaslServerFactory(final SaslServerFactory delegate, final Predicate predicate) {
super(delegate);
Assert.checkNotNullParam("predicate", predicate);
this.predicate = predicate;
}
/**
* Construct a new instance.
*
* @param delegate the factory to delegate to
* @param include {@code true} to only include the given mechanisms, {@code false} to exclude them
* @param mechanisms the mechanisms to include or exclude
*/
public FilterMechanismSaslServerFactory(final SaslServerFactory delegate, boolean include, String... mechanisms) {
super(delegate);
Assert.checkNotNullParam("mechanisms", mechanisms);
final HashSet set = new HashSet(mechanisms.length);
Collections.addAll(set, mechanisms);
Predicate predicate = set::contains;
this.predicate = include ? predicate : predicate.negate();
}
/**
* Construct a new instance.
*
* @param delegate the factory to delegate to
* @param include {@code true} to only include the given mechanisms, {@code false} to exclude them
* @param mechanisms the mechanisms to include or exclude
*/
public FilterMechanismSaslServerFactory(final SaslServerFactory delegate, boolean include, Collection mechanisms) {
super(delegate);
Assert.checkNotNullParam("mechanisms", mechanisms);
final HashSet set = new HashSet(mechanisms);
Predicate predicate = set::contains;
this.predicate = include ? predicate : predicate.negate();
}
public SaslServer createSaslServer(final String mechanism, final String protocol, final String serverName, final Map props, final CallbackHandler cbh) throws SaslException {
return predicate.test(mechanism) ? delegate.createSaslServer(mechanism, protocol, serverName, props, cbh) : null;
}
public String[] getMechanismNames(final Map props) {
final String[] names = delegate.getMechanismNames(props);
final ArrayList list = new ArrayList<>(names.length);
for (String name : names) {
if (predicate.test(name)) {
list.add(name);
}
}
return list.toArray(new String[list.size()]);
}
}