001    /* CollectionCertStoreParameters -- collection-based cert store parameters
002       Copyright (C) 2003 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010     
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package java.security.cert;
040    
041    import java.util.ArrayList;
042    import java.util.Collection;
043    import java.util.Collections;
044    
045    /**
046     * An implementation of {@link CertStoreParameters} with a simple,
047     * in-memory {@link Collection} of certificates and certificate
048     * revocation list.
049     *
050     * <p>Note that this class is not thread-safe, and its underlying
051     * collection may be changed at any time.
052     *
053     * @see CertStore
054     * @since 1.4
055     */
056    public class CollectionCertStoreParameters implements CertStoreParameters
057    {
058    
059      // Constants and fields.
060      // ------------------------------------------------------------------------
061    
062      /** The underlying collection. */
063      private final Collection collection;
064    
065      // Constructors.
066      // ------------------------------------------------------------------------
067    
068      /**
069       * Creates a new CollectionCertStoreParameters with an empty,
070       * immutable collection.
071       */
072      public CollectionCertStoreParameters()
073      {
074        this(Collections.EMPTY_LIST);
075      }
076    
077      /**
078       * Create a new CollectionCertStoreParameters with the specified
079       * collection. The argument is not copied, and subsequent changes to
080       * the collection will change this class's collection.
081       *
082       * @param collection The collection.
083       * @throws NullPointerException If <i>collection</i> is null.
084       */
085      public CollectionCertStoreParameters(Collection<?> collection)
086      {
087        if (collection == null)
088          throw new NullPointerException();
089        this.collection = collection;
090      }
091    
092      // Instance methods.
093      // ------------------------------------------------------------------------
094    
095      public Object clone()
096      {
097        return new CollectionCertStoreParameters(new ArrayList(collection));
098      }
099    
100      /**
101       * Return the underlying collection. The collection is not copied
102       * before being returned, so callers may update the collection that is
103       * returned.
104       *
105       * @return The collection.
106       */
107      public Collection<?> getCollection()
108      {
109        return collection;
110      }
111    
112      /**
113       * Return a string representation of these parameters.
114       *
115       * @return The string representation of these parameters.
116       */
117      public String toString()
118      {
119        return "CollectionCertStoreParameters: [ collection: "
120          + collection + " ]";
121      }
122    }