--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/compiler/OopMapStream.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2000 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.compiler;
+
+import sun.jvm.hotspot.code.*;
+
+public class OopMapStream {
+  private CompressedReadStream stream;
+  private OopMap oopMap;
+  private int mask;
+  private int size;
+  private int position;
+  private OopMapValue omv;
+  private boolean omvValid;
+
+  public OopMapStream(OopMap oopMap) {
+    this(oopMap, (OopMapValue.OopTypes[]) null);
+  }
+
+  public OopMapStream(OopMap oopMap, OopMapValue.OopTypes type) {
+    this(oopMap, (OopMapValue.OopTypes[]) null);
+    mask = type.getValue();
+  }
+
+  public OopMapStream(OopMap oopMap, OopMapValue.OopTypes[] types) {
+    if (oopMap.getOMVData() == null) {
+      stream = new CompressedReadStream(oopMap.getWriteStream().getBuffer());
+    } else {
+      stream = new CompressedReadStream(oopMap.getOMVData());
+    }
+    mask = computeMask(types);
+    size = (int) oopMap.getOMVCount();
+    position = 0;
+    omv = new OopMapValue();
+    omvValid = false;
+  }
+
+  public boolean isDone() {
+    if (!omvValid) {
+      findNext();
+    }
+    return !omvValid;
+  }
+
+  public void next() {
+    findNext();
+  }
+
+  public OopMapValue getCurrent() {
+    return omv;
+  }
+
+  //--------------------------------------------------------------------------------
+  // Internals only below this point
+  //
+
+  private int computeMask(OopMapValue.OopTypes[] types) {
+    mask = 0;
+    if (types != null) {
+      for (int i = 0; i < types.length; i++) {
+        mask |= types[i].getValue();
+      }
+    }
+    return mask;
+  }
+
+  private void findNext() {
+    while (position++ < size) {
+      omv.readFrom(stream);
+      if ((omv.getType().getValue() & mask) > 0) {
+        omvValid = true;
+        return;
+      }
+    }
+    omvValid = false;
+  }
+}