gomp-20050608-branch/libjava/classpath/gnu/java/security/x509/PolicyNodeImpl.java

   1 /* PolicyNodeImpl.java -- An implementation of a policy tree node.
   2    Copyright (C) 2004  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 gnu.java.security.x509;
  40
  41 import java.security.cert.PolicyNode;
  42 import java.security.cert.PolicyQualifierInfo;
  43
  44 import java.util.Collection;
  45 import java.util.Collections;
  46 import java.util.HashSet;
  47 import java.util.Iterator;
  48 import java.util.Set;
  49
  50 public final class PolicyNodeImpl implements PolicyNode
  51 {
  52
  53   // Fields.
  54   // -------------------------------------------------------------------------
  55
  56   private String policy;
  57   private final Set expectedPolicies;
  58   private final Set qualifiers;
  59   private final Set children;
  60   private PolicyNodeImpl parent;
  61   private int depth;
  62   private boolean critical;
  63   private boolean readOnly;
  64
  65   // Constructors.
  66   // -------------------------------------------------------------------------
  67
  68   public PolicyNodeImpl()
  69   {
  70     expectedPolicies = new HashSet();
  71     qualifiers = new HashSet();
  72     children = new HashSet();
  73     readOnly = false;
  74     critical = false;
  75   }
  76
  77   // Instance methods.
  78   // -------------------------------------------------------------------------
  79
  80   public void addChild(PolicyNodeImpl node)
  81   {
  82     if (readOnly)
  83       throw new IllegalStateException("read only");
  84     if (node.getParent() != null)
  85       throw new IllegalStateException("already a child node");
  86     node.parent = this;
  87     node.setDepth(depth + 1);
  88     children.add(node);
  89   }
  90
  91   public Iterator getChildren()
  92   {
  93     return Collections.unmodifiableSet(children).iterator();
  94   }
  95
  96   public int getDepth()
  97   {
  98     return depth;
  99   }
 100
 101   public void setDepth(int depth)
 102   {
 103     if (readOnly)
 104       throw new IllegalStateException("read only");
 105     this.depth = depth;
 106   }
 107
 108   public void addAllExpectedPolicies(Set policies)
 109   {
 110     if (readOnly)
 111       throw new IllegalStateException("read only");
 112     expectedPolicies.addAll(policies);
 113   }
 114
 115   public void addExpectedPolicy(String policy)
 116   {
 117     if (readOnly)
 118       throw new IllegalStateException("read only");
 119     expectedPolicies.add(policy);
 120   }
 121
 122   public Set getExpectedPolicies()
 123   {
 124     return Collections.unmodifiableSet(expectedPolicies);
 125   }
 126
 127   public PolicyNode getParent()
 128   {
 129     return parent;
 130   }
 131
 132   public void addAllPolicyQualifiers (Collection qualifiers)
 133   {
 134     for (Iterator it = qualifiers.iterator(); it.hasNext(); )
 135       {
 136         if (!(it.next() instanceof PolicyQualifierInfo))
 137           throw new IllegalArgumentException ("can only add PolicyQualifierInfos");
 138       }
 139     qualifiers.addAll (qualifiers);
 140   }
 141
 142   public void addPolicyQualifier (PolicyQualifierInfo qualifier)
 143   {
 144     if (readOnly)
 145       throw new IllegalStateException("read only");
 146     qualifiers.add(qualifier);
 147   }
 148
 149   public Set getPolicyQualifiers()
 150   {
 151     return Collections.unmodifiableSet(qualifiers);
 152   }
 153
 154   public String getValidPolicy()
 155   {
 156     return policy;
 157   }
 158
 159   public void setValidPolicy(String policy)
 160   {
 161     if (readOnly)
 162       throw new IllegalStateException("read only");
 163     this.policy = policy;
 164   }
 165
 166   public boolean isCritical()
 167   {
 168     return critical;
 169   }
 170
 171   public void setCritical(boolean critical)
 172   {
 173     if (readOnly)
 174       throw new IllegalStateException("read only");
 175     this.critical = critical;
 176   }
 177
 178   public void setReadOnly()
 179   {
 180     if (readOnly)
 181       return;
 182     readOnly = true;
 183     for (Iterator it = getChildren(); it.hasNext(); )
 184       ((PolicyNodeImpl) it.next()).setReadOnly();
 185   }
 186
 187   public String toString()
 188   {
 189     StringBuffer buf = new StringBuffer();
 190     for (int i = 0; i < depth; i++)
 191       buf.append("  ");
 192     buf.append("(");
 193     buf.append(PolicyNodeImpl.class.getName());
 194     buf.append(" (oid ");
 195     buf.append(policy);
 196     buf.append(") (depth ");
 197     buf.append(depth);
 198     buf.append(") (qualifiers ");
 199     buf.append(qualifiers);
 200     buf.append(") (critical ");
 201     buf.append(critical);
 202     buf.append(") (expectedPolicies ");
 203     buf.append(expectedPolicies);
 204     buf.append(") (children (");
 205     final String nl = System.getProperty("line.separator");
 206     for (Iterator it = getChildren(); it.hasNext(); )
 207       {
 208         buf.append(nl);
 209         buf.append(it.next().toString());
 210       }
 211     buf.append(")))");
 212     return buf.toString();
 213   }
 214 }