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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 java.security;
/**
* {@code DomainCombiner} is used to update and optimize {@code
* ProtectionDomain}s from an {@code AccessControlContext}.
*
* @see AccessControlContext
* @see AccessControlContext#AccessControlContext(AccessControlContext,
* DomainCombiner)
*/
public interface DomainCombiner {
/**
* Returns a combination of the two provided {@code ProtectionDomain}
* arrays. Implementers can simply merge the two arrays into one, remove
* duplicates and perform other optimizations.
*
* @param current
* the protection domains of the current execution thread (since
* the most recent call to {@link AccessController#doPrivileged}
* ).
* @param assigned
* the protection domains of the parent thread, maybe {@code
* null}.
* @return a single {@code ProtectionDomain} array computed from the two
* provided arrays.
*/
ProtectionDomain[] combine(ProtectionDomain[] current,
ProtectionDomain[] assigned);
}
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