1 /*
 2  * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 package sun.jvm.hotspot.oops;
26 
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.runtime.*;
31 import sun.jvm.hotspot.types.*;
32 import sun.jvm.hotspot.utilities.Observable;
33 import sun.jvm.hotspot.utilities.Observer;
34 
35 // A FlatArray is an array containing flattened value objects.
36 
37 public class FlatArray extends Array {
38   static {
39     VM.registerVMInitializedObserver(new Observer() {
40         public void update(Observable o, Object data) {
41           initialize(VM.getVM().getTypeDataBase());
42         }
43       });
44   }
45 
46   private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
47   }
48 
49   FlatArray(OopHandle handle, ObjectHeap heap) {
50     super(handle, heap);
51   }
52 
53   public boolean isFlatArray()         { return true; }
54 
55   public void printValueOn(PrintStream tty) {
56     FlatArrayKlass klass = (FlatArrayKlass) getKlass();
57     klass.printValueOn(tty);
58   }
59 
60   public void iterateFields(OopVisitor visitor, boolean doVMFields) {
61     super.iterateFields(visitor, doVMFields);
62     FlatArrayKlass klass = (FlatArrayKlass) getKlass();
63     int length = (int) getLength();
64     int type   = klass.getElementType();
65     //System.out.println("FlatArray.iterateFields: length:" + length + " type:" + type);
66     for (int index = 0; index < length; index++) {
67         // FIXME - call visitor.doXXX() for each component of each value object
68     }
69   }
70 }