001/* CollectionCertStoreParameters -- collection-based cert store parameters
002   Copyright (C) 2003 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.security.cert;
040
041import java.util.ArrayList;
042import java.util.Collection;
043import 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 */
056public 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}