1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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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
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24 
25 package sun.jvm.hotspot.utilities;
26 
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.runtime.*;
30 import sun.jvm.hotspot.oops.*;
31 import sun.jvm.hotspot.types.*;
32 
33 public class GrowableArray<T> extends GenericGrowableArray {
34   static {
VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } })35     VM.registerVMInitializedObserver(new Observer() {
36         public void update(Observable o, Object data) {
37           initialize(VM.getVM().getTypeDataBase());
38         }
39       });
40   }
41 
initialize(TypeDataBase db)42   private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
43     Type type      = db.lookupType("GrowableArray<int>");
44     dataField = type.getAddressField("_data");
45   }
46 
47   private static AddressField dataField;
48 
49   private InstanceConstructor<T> virtualConstructor;
50 
create(Address addr, InstanceConstructor<S> v)51   public static <S> GrowableArray<S> create(Address addr, InstanceConstructor<S> v) {
52     if (addr == null) return null;
53     return new GrowableArray<S>(addr, v);
54   }
55 
at(int i)56   public T at(int i) {
57     if (i < 0 || i >= length()) throw new ArrayIndexOutOfBoundsException(i);
58     Address data = dataField.getValue(getAddress());
59     Address addr = data.getAddressAt(i * VM.getVM().getAddressSize());
60     if (addr == null) return null;
61     return (T) virtualConstructor.instantiateWrapperFor(addr);
62   }
63 
GrowableArray(Address addr, InstanceConstructor<T> v)64   private GrowableArray(Address addr, InstanceConstructor<T> v) {
65     super(addr);
66     virtualConstructor = v;
67   }
getData()68   public Address getData() {
69     return dataField.getValue(getAddress());
70   }
71 }
72