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1 files changed, 202 insertions, 0 deletions

diff --git a/libjava/classpath/java/security/Permission.java b/libjava/classpath/java/security/Permission.java
new file mode 100644
index 000000000..cf6399b16
--- /dev/null
+++ b/libjava/classpath/java/security/Permission.java
@@ -0,0 +1,202 @@
+/* Permission.java -- The superclass for all permission objects
+   Copyright (C) 1998, 2001, 2002, 2005  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., 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
+conditions of the GNU General Public License cover the whole
+combination.
+
+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
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.security;
+
+import gnu.java.lang.CPStringBuilder;
+
+import java.io.Serializable;
+
+/**
+ * This class is the abstract superclass of all classes that implement
+ * the concept of a permission.  A permission consists of a permission name
+ * and optionally a list of actions that relate to the permission.  The
+ * actual meaning of the name of the permission is defined only in the
+ * context of a subclass.  It may name a resource to which access permissions
+ * are granted (for example, the name of a file) or it might represent
+ * something else entirely.  Similarly, the action list only has meaning
+ * within the context of a subclass.  Some permission names may have no
+ * actions associated with them.  That is, you either have the permission
+ * or you don't.
+ *
+ * <p>The most important method in this class is <code>implies</code>.  This
+ * checks whether if one has this permission, then the specified
+ * permission is also implied.  As a conceptual example, consider the
+ * permissions "Read All Files" and "Read File foo".  The permission
+ * "Read All Files" implies that the caller has permission to read the
+ * file foo.
+ *
+ * <p><code>Permission</code>'s must be immutable - do not change their
+ * state after creation.
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @see Permissions
+ * @see PermissionCollection
+ * @since 1.1
+ * @status updated to 1.4
+ */
+public abstract class Permission implements Guard, Serializable
+{
+  /**
+   * Compatible with JDK 1.1+.
+   */
+  private static final long serialVersionUID = -5636570222231596674L;
+
+  /**
+   * This is the name assigned to this permission object.
+   *
+   * @serial the name of the permission
+   */
+  private String name;
+
+  /**
+   * Create an instance with the specified name.
+   *
+   * @param name the permission name
+   */
+  public Permission(String name)
+  {
+    this.name = name;
+  }
+
+  /**
+   * This method implements the <code>Guard</code> interface for this class.
+   * It calls the <code>checkPermission</code> method in
+   * <code>SecurityManager</code> with this <code>Permission</code> as its
+   * argument.  This method returns silently if the security check succeeds
+   * or throws an exception if it fails.
+   *
+   * @param obj the <code>Object</code> being guarded - ignored by this class
+   * @throws SecurityException if the security check fails
+   * @see GuardedObject
+   * @see SecurityManager#checkPermission(Permission)
+   */
+  public void checkGuard(Object obj)
+  {
+    SecurityManager sm = System.getSecurityManager();
+    if (sm != null)
+      sm.checkPermission(this);
+  }
+
+  /**
+   * This method tests whether this <code>Permission</code> implies that the
+   * specified <code>Permission</code> is also granted.
+   *
+   * @param perm the <code>Permission</code> to test against
+   * @return true if perm is implied by this
+   */
+  public abstract boolean implies(Permission perm);
+
+  /**
+   * Check to see if this object equals obj. Use <code>implies</code>, rather
+   * than <code>equals</code>, when making access control decisions.
+   *
+   * @param obj the object to compare to
+   */
+  public abstract boolean equals(Object obj);
+
+  /**
+   * This method returns a hash code for this <code>Permission</code>. It
+   * must satisfy the contract of <code>Object.hashCode</code>: it must be
+   * the same for all objects that equals considers to be the same.
+   *
+   * @return a hash value
+   */
+  public abstract int hashCode();
+
+  /**
+   * Get the name of this <code>Permission</code>.
+   *
+   * @return the name
+   */
+  public final String getName()
+  {
+    return name;
+  }
+
+  /**
+   * This method returns the list of actions for this <code>Permission</code>
+   * as a <code>String</code>. The string should be in canonical order, for
+   * example, both <code>new FilePermission(f, "write,read")</code> and
+   * <code>new FilePermission(f, "read,write")</code> have the action list
+   * "read,write".
+   *
+   * @return the action list for this <code>Permission</code>
+   */
+  public abstract String getActions();
+
+  /**
+   * This method returns an empty <code>PermissionCollection</code> object
+   * that can store permissions of this type, or <code>null</code> if no
+   * such collection is defined. Subclasses must override this to provide
+   * an appropriate collection when one is needed to accurately calculate
+   * <code>implies</code>.
+   *
+   * @return a new <code>PermissionCollection</code>
+   */
+  public PermissionCollection newPermissionCollection()
+  {
+    return null;
+  }
+
+  /**
+   * This method returns a <code>String</code> representation of this
+   * <code>Permission</code> object. This is in the format:
+   * <code>'(' + getClass().getName() + ' ' + getName() + ' ' + getActions
+   * + ')'</code>.
+   *
+   * @return this object as a <code>String</code>
+   */
+  public String toString()
+  {
+    CPStringBuilder string = new CPStringBuilder();
+
+    string = string.append('(');
+    string = string.append(getClass().getName());
+    string = string.append(' ');
+    string = string.append(getName());
+
+    if (!(getActions().equals("")))
+      {
+        string = string.append(' ');
+        string = string.append(getActions());
+      }
+
+    string = string.append(')');
+    return string.toString();
+  }
+} // class Permission