--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/utilities/ConstantTag.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2001-2005 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.utilities;
+
+public class ConstantTag {
+  // These replicated from the VM to save space
+  private static int JVM_CONSTANT_Utf8                    = 1;
+  private static int JVM_CONSTANT_Unicode                 = 2; // unused
+  private static int JVM_CONSTANT_Integer                 = 3;
+  private static int JVM_CONSTANT_Float                   = 4;
+  private static int JVM_CONSTANT_Long                    = 5;
+  private static int JVM_CONSTANT_Double                  = 6;
+  private static int JVM_CONSTANT_Class                   = 7;
+  private static int JVM_CONSTANT_String                  = 8;
+  private static int JVM_CONSTANT_Fieldref                = 9;
+  private static int JVM_CONSTANT_Methodref               = 10;
+  private static int JVM_CONSTANT_InterfaceMethodref      = 11;
+  private static int JVM_CONSTANT_NameAndType             = 12;
+  private static int JVM_CONSTANT_Invalid                 = 0;   // For bad value initialization
+  private static int JVM_CONSTANT_UnresolvedClass         = 100; // Temporary tag until actual use
+  private static int JVM_CONSTANT_ClassIndex              = 101; // Temporary tag while constructing constant pool
+  private static int JVM_CONSTANT_UnresolvedString        = 102; // Temporary tag until actual use
+  private static int JVM_CONSTANT_StringIndex             = 103; // Temporary tag while constructing constant pool
+  private static int JVM_CONSTANT_UnresolvedClassInError  = 104; // Resolution failed
+
+  private byte tag;
+
+  public ConstantTag(byte tag) {
+    this.tag = tag;
+  }
+
+  public boolean isKlass()            { return tag == JVM_CONSTANT_Class; }
+  public boolean isField ()           { return tag == JVM_CONSTANT_Fieldref; }
+  public boolean isMethod()           { return tag == JVM_CONSTANT_Methodref; }
+  public boolean isInterfaceMethod()  { return tag == JVM_CONSTANT_InterfaceMethodref; }
+  public boolean isString()           { return tag == JVM_CONSTANT_String; }
+  public boolean isInt()              { return tag == JVM_CONSTANT_Integer; }
+  public boolean isFloat()            { return tag == JVM_CONSTANT_Float; }
+  public boolean isLong()             { return tag == JVM_CONSTANT_Long; }
+  public boolean isDouble()           { return tag == JVM_CONSTANT_Double; }
+  public boolean isNameAndType()      { return tag == JVM_CONSTANT_NameAndType; }
+  public boolean isUtf8()             { return tag == JVM_CONSTANT_Utf8; }
+
+  public boolean isInvalid()          { return tag == JVM_CONSTANT_Invalid; }
+
+  public boolean isUnresolvedKlass()  {
+    return tag == JVM_CONSTANT_UnresolvedClass || tag == JVM_CONSTANT_UnresolvedClassInError;
+  }
+  public boolean isUnresolveKlassInError()  { return tag == JVM_CONSTANT_UnresolvedClassInError; }
+  public boolean isKlassIndex()             { return tag == JVM_CONSTANT_ClassIndex; }
+  public boolean isUnresolvedString()       { return tag == JVM_CONSTANT_UnresolvedString; }
+  public boolean isStringIndex()            { return tag == JVM_CONSTANT_StringIndex; }
+
+  public boolean isKlassReference()   { return isKlassIndex() || isUnresolvedKlass(); }
+  public boolean isFieldOrMethod()    { return isField() || isMethod() || isInterfaceMethod(); }
+  public boolean isSymbol()           { return isUtf8(); }
+}