gomp-20050608-branch/libjava/classpath/java/security/cert/CollectionCertStoreParameters.java

   1 /* CollectionCertStoreParameters -- collection-based cert store parameters
   2    Copyright (C) 2003 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package java.security.cert;
  40
  41 import java.util.ArrayList;
  42 import java.util.Collection;
  43 import java.util.Collections;
  44
  45 /**
  46  * An implementation of {@link CertStoreParameters} with a simple,
  47  * in-memory {@link Collection} of certificates and certificate
  48  * revocation list.
  49  *
  50  * <p>Note that this class is not thread-safe, and its underlying
  51  * collection may be changed at any time.
  52  *
  53  * @see CertStore
  54  */
  55 public class CollectionCertStoreParameters implements CertStoreParameters
  56 {
  57
  58   // Constants and fields.
  59   // ------------------------------------------------------------------------
  60
  61   /** The underlying collection. */
  62   private final Collection collection;
  63
  64   // Constructors.
  65   // ------------------------------------------------------------------------
  66
  67   /**
  68    * Creates a new CollectionCertStoreParameters with an empty,
  69    * immutable collection.
  70    */
  71   public CollectionCertStoreParameters()
  72   {
  73     this(Collections.EMPTY_LIST);
  74   }
  75
  76   /**
  77    * Create a new CollectionCertStoreParameters with the specified
  78    * collection. The argument is not copied, and subsequent changes to
  79    * the collection will change this class's collection.
  80    *
  81    * @param collection The collection.
  82    * @throws NullPointerException If <i>collection</i> is null.
  83    */
  84   public CollectionCertStoreParameters(Collection collection)
  85   {
  86     if (collection == null)
  87       throw new NullPointerException();
  88     this.collection = collection;
  89   }
  90
  91   // Instance methods.
  92   // ------------------------------------------------------------------------
  93
  94   public Object clone()
  95   {
  96     return new CollectionCertStoreParameters(new ArrayList(collection));
  97   }
  98
  99   /**
 100    * Return the underlying collection. The collection is not copied
 101    * before being returned, so callers may update the collection that is
 102    * returned.
 103    *
 104    * @return The collection.
 105    */
 106   public Collection getCollection()
 107   {
 108     return collection;
 109   }
 110
 111   /**
 112    * Return a string representation of these parameters.
 113    *
 114    * @return The string representation of these parameters.
 115    */
 116   public String toString()
 117   {
 118     return "CollectionCertStoreParameters: [ collection: "
 119       + collection + " ]";
 120   }
 121 }