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downloading a git-generated archive based on the 'upstream' tag
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1 files changed, 271 insertions, 0 deletions

diff --git a/libjava/classpath/java/util/PropertyPermission.java b/libjava/classpath/java/util/PropertyPermission.java
new file mode 100644
index 000000000..6ed4690d8
--- /dev/null
+++ b/libjava/classpath/java/util/PropertyPermission.java
@@ -0,0 +1,271 @@
+/* PropertyPermission.java -- permission to get and set System properties
+   Copyright (C) 1999, 2000, 2002, 2004, 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.util;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamField;
+import java.security.BasicPermission;
+import java.security.Permission;
+import java.security.PermissionCollection;
+
+/**
+ * This class represents the permission to access and modify a property.<br>
+ *
+ * The name is the name of the property, e.g. xxx.  You can also
+ * use an asterisk "*" as described in BasicPermission.<br>
+ *
+ * The action string is a comma-separated list of keywords.  There are
+ * two possible actions:
+ * <dl>
+ * <dt>read</dt>
+ * <dd>Allows to read the property via <code>System.getProperty</code>.</dd>
+ * <dt>write</dt>
+ * <dd>Allows to write the property via <code>System.setProperty</code>.</dd>
+ * </dl>
+ *
+ * The action string is case insensitive (it is converted to lower case).
+ *
+ * @see Permission
+ * @see BasicPermission
+ * @see SecurityManager
+ * @author Jochen Hoenicke
+ * @since 1.2
+ * @status updated to 1.4
+ */
+public final class PropertyPermission extends BasicPermission
+{
+  /**
+   * PropertyPermission uses a more efficient representation than the
+   * serialized form; this documents the difference.
+   *
+   * @serialField action String the action string
+   */
+  private static final ObjectStreamField[] serialPersistentFields =
+  {
+    new ObjectStreamField("action", String.class)
+  };
+
+  /**
+   * Compatible with JDK 1.2+.
+   */
+  private static final long serialVersionUID = 885438825399942851L;
+
+  /** Permission to read. */
+  private static final int READ = 1;
+  /** Permission to write. */
+  private static final int WRITE = 2;
+
+  /** The set of actions permitted. */
+  // Package visible for use by PropertyPermissionCollection.
+  transient int actions;
+
+  /**
+   * The String forms of the actions permitted.
+   */
+  private static final String actionStrings[] =
+  {
+    "", "read", "write", "read,write"
+  };
+
+  /**
+   * Constructs a PropertyPermission with the specified property.  Possible
+   * actions are read and write, comma-separated and case-insensitive.
+   *
+   * @param name the name of the property
+   * @param actions the action string
+   * @throws NullPointerException if name is null
+   * @throws IllegalArgumentException if name string contains an
+   *         illegal wildcard or actions string contains an illegal action
+   *         (this includes a null actions string)
+   */
+  public PropertyPermission(String name, String actions)
+  {
+    super(name);
+    if (actions == null)
+      throw new IllegalArgumentException();
+    setActions(actions);
+  }
+
+  /**
+   * Parse the action string and convert actions from external to internal
+   * form.  This will set the internal actions field.
+   *
+   * @param str the action string
+   * @throws IllegalArgumentException if actions string contains an
+   *         illegal action
+   */
+  private void setActions(String str)
+  {
+    // Initialising the class java.util.Locale ...
+    //    tries to initialise the Locale.defaultLocale static
+    //    which calls System.getProperty,
+    //    which calls SecurityManager.checkPropertiesAccess,
+    //    which creates a PropertyPermission with action "read,write",
+    //    which calls setActions("read,write").
+    // If we now were to call toLowerCase on 'str',
+    //    this would call Locale.getDefault() which returns null
+    //       because Locale.defaultLocale hasn't been set yet
+    //    then toLowerCase will fail with a null pointer exception.
+    //
+    // The solution is to take a punt on 'str' being lower case, and
+    // test accordingly.  If that fails, we convert 'str' to lower case
+    // and try the tests again.
+    if ("read".equals(str))
+      actions = READ;
+    else if ("write".equals(str))
+      actions = WRITE;
+    else if ("read,write".equals(str) || "write,read".equals(str))
+      actions = READ | WRITE;
+    else
+      {
+        String lstr = str.toLowerCase();
+        if ("read".equals(lstr))
+          actions = READ;
+        else if ("write".equals(lstr))
+          actions = WRITE;
+        else if ("read,write".equals(lstr) || "write,read".equals(lstr))
+          actions = READ | WRITE;
+        else
+          throw new IllegalArgumentException("illegal action " + str);
+      }
+  }
+
+  /**
+   * Reads an object from the stream. This converts the external to the
+   * internal representation.
+   *
+   * @param s the stream to read from
+   * @throws IOException if the stream fails
+   * @throws ClassNotFoundException if reserialization fails
+   */
+  private void readObject(ObjectInputStream s)
+    throws IOException, ClassNotFoundException
+  {
+    ObjectInputStream.GetField fields = s.readFields();
+    setActions((String) fields.get("actions", null));
+  }
+
+  /**
+   * Writes an object to the stream. This converts the internal to the
+   * external representation.
+   *
+   * @param s the stram to write to
+   * @throws IOException if the stream fails
+   */
+  private void writeObject(ObjectOutputStream s) throws IOException
+  {
+    ObjectOutputStream.PutField fields = s.putFields();
+    fields.put("actions", getActions());
+    s.writeFields();
+  }
+
+  /**
+   * Check if this permission implies p.  This returns true iff all of
+   * the following conditions are true:
+   * <ul>
+   * <li> p is a PropertyPermission </li>
+   * <li> this.getName() implies p.getName(),
+   *  e.g. <code>java.*</code> implies <code>java.home</code> </li>
+   * <li> this.getActions is a subset of p.getActions </li>
+   * </ul>
+   *
+   * @param p the permission to check
+   * @return true if this permission implies p
+   */
+  public boolean implies(Permission p)
+  {
+    // BasicPermission checks for name and type.
+    if (super.implies(p))
+      {
+        // We have to check the actions.
+        PropertyPermission pp = (PropertyPermission) p;
+        return (pp.actions & ~actions) == 0;
+      }
+    return false;
+  }
+
+  /**
+   * Check to see whether this object is the same as another
+   * PropertyPermission object; this is true if it has the same name and
+   * actions.
+   *
+   * @param obj the other object
+   * @return true if the two are equivalent
+   */
+  public boolean equals(Object obj)
+  {
+    return super.equals(obj) && actions == ((PropertyPermission) obj).actions;
+  }
+
+  /**
+   * Returns the hash code for this permission.  It is equivalent to
+   * <code>getName().hashCode()</code>.
+   *
+   * @return the hash code
+   */
+  public int hashCode()
+  {
+    return super.hashCode();
+  }
+
+  /**
+   * Returns the action string.  Note that this may differ from the string
+   * given at the constructor:  The actions are converted to lowercase and
+   * may be reordered.
+   *
+   * @return one of "read", "write", or "read,write"
+   */
+  public String getActions()
+  {
+    return actionStrings[actions];
+  }
+
+  /**
+   * Returns a permission collection suitable to take
+   * PropertyPermission objects.
+   *
+   * @return a new empty PermissionCollection
+   */
+  public PermissionCollection newPermissionCollection()
+  {
+    return new PropertyPermissionCollection();
+  }
+}