PolicyNode.java

/* PolicyNode.java -- a single node in a policy tree
   Copyright (C) 2003 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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package java.security.cert;

import java.util.Iterator;
import java.util.Set;

/**
 * @since 1.4
 */
public interface PolicyNode
{

  /**
   * Get the iterator of the child nodes of this node. The returned
   * iterator is (naturally) unmodifiable.
   *
   * @return An iterator over the child nodes.
   */
  Iterator<? extends PolicyNode> getChildren();

  /**
   * Get the depth of this node within the tree, starting at 0 for the
   * root node.
   *
   * @return The depth of this node.
   */
  int getDepth();

  /**
   * Returns a set of policies (string OIDs) that will satisfy this
   * node's policy. The root node should always return the singleton set
   * with the element "any-policy".
   *
   * @return The set of expected policies.
   */
  Set<String> getExpectedPolicies();

  /**
   * Returns the parent node of this node, or null if this is the root
   * node.
   *
   * @return The parent node, or null.
   */
  PolicyNode getParent();

  /**
   * Returns a set of {@link PolicyQualifierInfo} objects that qualify
   * the valid policy of this node. The root node should always return
   * the empty set.
   *
   * @return The set of {@link PolicyQualifierInfo} objects.
   */
  Set<? extends PolicyQualifierInfo> getPolicyQualifiers();

  /**
   * Get the policy OID this node represents. The root node should return
   * the special value "any-policy".
   *
   * @return The policy of this node.
   */
  String getValidPolicy();

  /**
   * Return the criticality flag of this policy node. Nodes who return
   * true for this method should be considered critical. The root node
   * is never critical.
   *
   * @return The criticality flag.
   */
  boolean isCritical();
}