83 lines
3.0 KiB
Java
83 lines
3.0 KiB
Java
/* IntersectingDomainCombiner.java --
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.security;
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import java.util.HashSet;
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/**
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* A trivial implementation of {@link DomainCombiner} that produces the
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* intersection of the supplied {@link ProtectionDomain} objects.
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*/
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final class IntersectingDomainCombiner implements DomainCombiner
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{
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// Contstant.
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// -------------------------------------------------------------------------
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static final IntersectingDomainCombiner SINGLETON = new IntersectingDomainCombiner();
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// Constructor.
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// -------------------------------------------------------------------------
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private IntersectingDomainCombiner()
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{
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}
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// Methods.
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// -------------------------------------------------------------------------
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public ProtectionDomain[] combine (ProtectionDomain[] currentDomains,
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ProtectionDomain[] assignedDomains)
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{
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HashSet newDomains = new HashSet ();
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for (int i = 0; i < currentDomains.length; i++)
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{
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if (currentDomains[i] == null)
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continue;
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for (int j = 0; j < assignedDomains.length; j++)
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{
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if (currentDomains[i].equals (assignedDomains[j]))
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newDomains.add (currentDomains[i]);
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}
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}
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return (ProtectionDomain[])
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newDomains.toArray(new ProtectionDomain[newDomains.size()]);
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}
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}
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