--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/memory/Dictionary.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.memory;
+
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.types.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.utilities.*;
+
+public class Dictionary extends TwoOopHashtable {
+  static {
+    VM.registerVMInitializedObserver(new Observer() {
+        public void update(Observable o, Object data) {
+          initialize(VM.getVM().getTypeDataBase());
+        }
+      });
+  }
+
+  private static synchronized void initialize(TypeDataBase db) {
+    // just checking that the type exists
+    Type type = db.lookupType("Dictionary");
+  }
+
+  public Dictionary(Address addr) {
+    super(addr);
+  }
+
+  // this is overriden here so that Hashtable.bucket will return
+  // object of DictionaryEntry.class
+  protected Class getHashtableEntryClass() {
+    return DictionaryEntry.class;
+  }
+
+  /** Iterate over all klasses in dictionary; just the classes from
+      declaring class loaders */
+  public void classesDo(SystemDictionary.ClassVisitor v) {
+    ObjectHeap heap = VM.getVM().getObjectHeap();
+    int tblSize = tableSize();
+    for (int index = 0; index < tblSize; index++) {
+      for (DictionaryEntry probe = (DictionaryEntry) bucket(index); probe != null;
+                                             probe = (DictionaryEntry) probe.next()) {
+        Oop k = probe.klass();
+        if (k.isKlass() &&
+            heap.equal(probe.loader(), ((InstanceKlass) k).getClassLoader())) {
+          v.visit((Klass) k);
+        }
+      }
+    }
+  }
+
+  /** All classes, and their class loaders */
+  public void classesDo(SystemDictionary.ClassAndLoaderVisitor v) {
+    int tblSize = tableSize();
+    for (int index = 0; index < tblSize; index++) {
+      for (DictionaryEntry probe = (DictionaryEntry) bucket(index); probe != null;
+                                             probe = (DictionaryEntry) probe.next()) {
+        Oop k = probe.klass();
+        if (k.isKlass()) {
+          v.visit((Klass) k, probe.loader());
+        }
+      }
+    }
+  }
+
+  public Klass find(int index, long hash, Symbol className, Oop classLoader, Oop protectionDomain) {
+    DictionaryEntry entry = getEntry(index, hash, className, classLoader);
+    if (entry != null && entry.isValidProtectionDomain(protectionDomain)) {
+      return entry.klass();
+    }
+    return null;
+  }
+
+  // - Internals only below this point
+
+  private DictionaryEntry getEntry(int index, long hash, Symbol className, Oop classLoader) {
+    for (DictionaryEntry entry = (DictionaryEntry) bucket(index); entry != null;
+                                    entry = (DictionaryEntry) entry.next()) {
+      if (entry.hash() == hash && entry.equals(className, classLoader)) {
+        return entry;
+      }
+    }
+    return null;
+  }
+}