Jumbo patch:

* Imported beans and serialization
* Updated IA-64 port
* Miscellaneous bug fixes

From-SVN: r34028

libjava/java/security/BasicPermission.java

@@ -0,0 +1,271 @@
+/* BasicPermission.java -- Implements a simple named permission.
+   Copyright (C) 1998, 1999 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.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+
+package java.security;
+
+import java.io.Serializable;
+import java.util.Hashtable;
+import java.util.Enumeration;
+
+/**
+  * This class implements a simple model for named permissions without an
+  * associated action list.  That is, either the named permission is granted
+  * or it is not.  
+  * <p>
+  * It also supports trailing wildcards to allow the
+  * easy granting of permissions in a hierarchical fashion.  (For example,
+  * the name "org.gnu.*" might grant all permissions under the "org.gnu"
+  * permissions hierarchy).  The only valid wildcard character is a '*'
+  * which matches anything.  It must be the rightmost element in the
+  * permission name and must follow a '.' or else the Permission name must
+  * consist of only a '*'.  Any other occurrence of a '*' is not valid.
+  * <p>
+  * This class ignores the action list.  Subclasses can choose to implement
+  * actions on top of this class if desired.
+  *
+  * @version 0.1
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  */
+public abstract class BasicPermission extends Permission implements Serializable
+{
+
+  /*************************************************************************/
+
+  /*
+   * Constructors
+   */
+
+  /**
+   * This method initializes a new instance of <code>BasicPermission</code>
+   * with the specified name.  If the name contains an illegal wildcard
+   * character, an exception is thrown.
+   *
+   * @param name The name of this permission.
+   *
+   * @exception IllegalArgumentException If the name contains an invalid wildcard character
+   * @exception NullPointerException If the name is null
+   */
+  public 
+  BasicPermission(String name) throws IllegalArgumentException, NullPointerException
+  {
+    super(name);
+
+    if (name.indexOf("*") != -1)
+      {
+	if (!name.endsWith(".*") && !name.equals("*"))
+          throw new IllegalArgumentException("Bad wildcard: " + name);
+
+	if (name.indexOf("*") != name.lastIndexOf("*"))
+          throw new IllegalArgumentException("Bad wildcard: " + name);
+      }
+  }
+
+  /*************************************************************************/
+
+  /**
+   * This method initializes a new instance of <code>BasicPermission</code>
+   * with the specified name.  If the name contains an illegal wildcard
+   * character, an exception is thrown.  The action list passed to this
+   * form of the constructor is ignored.
+   *
+   * @param name The name of this permission.
+   * @param actions The list of actions for this permission - ignored in this class.
+   *
+   * @exception IllegalArgumentException If the name contains an invalid wildcard character
+   * @exception NullPointerException If the name is null
+   */
+  public
+  BasicPermission(String name, String actions) throws IllegalArgumentException, NullPointerException
+  {
+    // ignore actions
+    this(name);
+  }
+
+  /*************************************************************************/
+
+  /**
+   * This method tests to see if the specified permission is implied by 
+   * this permission.  This will be true if the following conditions are met:
+   * <p>
+   * <ul>
+   * <li>The specified object is an instance of <code>BasicPermission</code>, 
+   * or a subclass.
+   * <li>The name of the specified permission is identical to this permission's
+   * name or the name of the specified permission satisfies a wildcard match 
+   * on this permission.
+   * </ul>
+   *
+   * @param perm The <code>Permission</code> object to test against.
+   *
+   * @return <code>true</code> if the specified permission is implied by this one or <code>false</code> otherwise.
+   */
+  public boolean
+  implies(Permission perm)
+  {
+    if (!(perm instanceof BasicPermission))
+      return false;
+
+    String otherName = perm.getName();
+    String name = getName();
+
+    if (name.equals(otherName))
+      return true;
+
+    int last = name.length() - 1;
+    if (name.charAt(last) == '*'
+	&& otherName.startsWith(name.substring(0, last)))
+      return true;
+
+    return false;
+  }
+
+  /*************************************************************************/
+
+  /**
+   * This method tests to see if this object is equal to the specified
+   * <code>Object</code>.  This will be true if and only if the specified
+   * object meets the following conditions:
+   * <p>
+   * <ul>
+   * <li>It is an instance of <code>BasicPermission</code>, or a subclass.
+   * <li>It has the same name as this permission.
+   * </ul>
+   *
+   * @param obj The <code>Object</code> to test for equality against this object
+   *
+   * @return <code>true</code> if the specified <code>Object</code> is equal to this object or <code>false</code> otherwise.
+   */
+  public boolean
+  equals(Object obj)
+  {
+    if (!(obj instanceof BasicPermission))
+      return(false);
+
+    if (!getName().equals(((BasicPermission)obj).getName()))
+      return(false);
+
+    return(true);
+  }
+
+  /*************************************************************************/
+
+  /**
+   * This method returns a hash code for this permission object.  The hash
+   * code returned is the value returned by calling the <code>hashCode</code>
+   * method on the <code>String</code> that is the name of this permission.
+   *
+   * @return A hash value for this object
+   */
+  public int
+  hashCode()
+  {
+    return(getName().hashCode());
+  }
+
+  /*************************************************************************/
+
+  /**
+   * This method returns a list of the actions associated with this 
+   * permission.  This method always returns the empty string ("") since
+   * this class ignores actions.
+   *
+   * @return The action list.
+   */
+  public String
+  getActions()
+  {
+    return("");
+  }
+
+  /*************************************************************************/
+
+  /**
+   * This method returns an instance of <code>PermissionCollection</code>
+   * suitable for storing <code>BasicPermission</code> objects.  This returns
+   * be a sub class of <code>PermissionCollection</code>
+   * that allows for an efficient and consistent implementation of
+   * the <code>implies</code> method.  The collection doesn't handle subclasses
+   * of BasicPermission correctly; they must override this method. 
+   *
+   * @return A new empty <code>PermissionCollection</code> object.
+   */
+  public PermissionCollection
+  newPermissionCollection()
+  {
+    return new PermissionCollection() 
+      {
+	Hashtable permissions = new Hashtable();
+	boolean allAllowed = false;
+      
+	public void add(Permission permission) 
+	{
+	  if (isReadOnly())
+	    throw new IllegalStateException("readonly");
+
+	  BasicPermission bp = (BasicPermission) permission;
+	  String name = bp.getName();
+	  if (name.equals("*"))
+	    allAllowed = true;
+	  permissions.put(name, bp);
+	}
+      
+	public boolean implies(Permission permission)
+	{
+	  if (!(permission instanceof BasicPermission))
+	    return false;
+	    
+	  if (allAllowed)
+	    return true;
+
+	  BasicPermission toImply = (BasicPermission) permission;
+	  String name = toImply.getName();
+	  if (name.equals("*"))
+	    return false;
+
+	  int prefixLength = name.length();
+	  if (name.endsWith("*"))
+	    prefixLength -= 2;
+
+	  while (true) {
+	    if (permissions.get(name) != null)
+	      return true;
+	      
+	    prefixLength = name.lastIndexOf('.', prefixLength);
+	    if (prefixLength < 0)
+	      return false;
+	    name = name.substring(0, prefixLength + 1) + '*';
+	  }
+	}
+      
+	public Enumeration elements()
+	{
+	  return permissions.elements();
+	}
+      };
+  }
+} // class BasicPermission