* configure.in (AC_OUTPUT): List new Makefiles.

    * gnu/java/Makefile.am (SUBDIRS): Added util.
    * java/util/Makefile.am (SUBDIRS): Added prefs.
    * gnu/java/util/.cvsignore, gnu/java/util/Makefile.am,
    gnu/java/util/prefs/.cvsignore, gnu/java/util/prefs/Makefile.am,
    java/util/prefs/.cvsignore, java/util/prefs/Makefile.am: New files.
    * gnu/java/util/prefs/FileBasedFactory.java,
    gnu/java/util/prefs/MemoryBasedFactory.java
    gnu/java/util/prefs/MemoryBasedPreferences.java
    gnu/java/util/prefs/NodeReader.java
    gnu/java/util/prefs/NodeWriter.java
    java/util/prefs/AbstractPreferences.java
    java/util/prefs/BackingStoreException.java
    java/util/prefs/InvalidPreferencesFormatException.java
    java/util/prefs/NodeChangeEvent.java
    java/util/prefs/NodeChangeListener.java
    java/util/prefs/PreferenceChangeEvent.java
    java/util/prefs/PreferenceChangeListener.java
    java/util/prefs/Preferences.java
    java/util/prefs/PreferencesFactory.java: New class files.

1 files changed, 133 insertions, 0 deletions

diff --git a/gnu/java/util/prefs/MemoryBasedPreferences.java b/gnu/java/util/prefs/MemoryBasedPreferences.java
new file mode 100644
index 000000000..f4cdeec06
--- /dev/null
+++ b/gnu/java/util/prefs/MemoryBasedPreferences.java
@@ -0,0 +1,133 @@
+/* MemoryBasedPreferences - A Preference node which holds all entries in memory
+   Copyright (C) 2001 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 gnu.java.util.prefs;
+
+import java.util.HashMap;
+
+import java.util.prefs.*;
+
+/**
+ * A Preference node which holds all entries in memory
+ *
+ * @author Mark Wielaard (mark@klomp.org)
+ */
+public class MemoryBasedPreferences extends AbstractPreferences {
+
+    /** True if this is a preference node in the user tree, false otherwise. */
+    private final boolean isUser;
+
+    /** Contains all the preference entries of this node. */
+    private HashMap entries = new HashMap();
+
+    /**
+     * Creates a new preferences node with the given name and parent.
+     * When isUser is true it will be user node otherwise it will be a system
+     * node. It will always set the <code>newNode</code> field to true
+     * since there is no real backing store, so all nodes are new.
+     */
+    public MemoryBasedPreferences(MemoryBasedPreferences parent,
+                                  String name,
+                                  boolean isUser) {
+        super(parent, name);
+        this.isUser = isUser;
+
+        // Since we do not have a real backing store all nodes are new
+        newNode = true;
+    }
+
+    /**
+     * Returns true if this node was created as a user node.
+     */
+    public boolean isUserNode() {
+        return isUser;
+    }
+
+    /**
+     * Returns an empty array since all children names are always already
+     * chached.
+     */
+    protected String[] childrenNamesSpi() throws BackingStoreException {
+        return new String[0];
+    }
+
+    /**
+     * Returns a new node with the given name with as parent this node and
+     * with the <code>isUser</code> flag set to the same value as this node.
+     */
+    protected AbstractPreferences childSpi(String childName) {
+       return new MemoryBasedPreferences(this, childName, isUser);
+    }
+
+    /**
+     * Returns a (possibly empty) array of keys of the preferences entries of
+     * this node.
+     */
+    protected String[] keysSpi() throws BackingStoreException {
+        return (String[]) entries.keySet().toArray(new String[entries.size()]);
+    }
+
+    /**
+     * Returns the associated value from this nodes preferences entries or
+     * null when the key has not been set.
+     */
+    protected String getSpi(String key) {
+        return (String) entries.get(key);
+    }
+
+    /**
+     * Sets the value for the given key.
+     */
+    protected void putSpi(String key, String value) {
+        entries.put(key, value);
+    }
+
+    /**
+     * Removes the entry with the given key.
+     */
+    protected void removeSpi(String key) {
+        entries.remove(key);
+    }
+
+    /**
+     * Does nothing since we do not have any backing store.
+     */
+    protected void flushSpi() {
+    }
+
+    /**
+     * Does nothing since we do not have any backing store.
+     */
+    protected void syncSpi() {
+    }
+
+    /**
+     * Just removes the entries map of this node.
+     */
+    protected void removeNodeSpi() {
+        entries = null;
+    }
+}