01: //
02: // Copyright (C) 2005 United States Government as represented by the
03: // Administrator of the National Aeronautics and Space Administration
04: // (NASA). All Rights Reserved.
05: //
06: // This software is distributed under the NASA Open Source Agreement
07: // (NOSA), version 1.3. The NOSA has been approved by the Open Source
08: // Initiative. See the file NOSA-1.3-JPF at the top of the distribution
09: // directory tree for the complete NOSA document.
10: //
11: // THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
12: // KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
13: // LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
14: // SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
15: // A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
16: // THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
17: // DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
18: //
19: package gov.nasa.jpf.jvm;
20:
21: import gov.nasa.jpf.JPFException;
22:
23: /**
24: * A specialized version of ElementInfo for use in the DynamicArea.
25: * DynamicElementInfo objects represent heap objects
26: * @see gov.nasa.jpf.jvm.ElementInfo
27: */
28: public class DynamicElementInfo extends ElementInfo {
29: static final int storingDataLength = ElementInfo.storingDataLength;
30:
31: public DynamicElementInfo() {
32: }
33:
34: public DynamicElementInfo(Fields f, Monitor m) {
35: super (f, m);
36: }
37:
38: public int getNumberOfFields() {
39: return getClassInfo().getNumberOfDeclaredInstanceFields();
40: }
41:
42: public FieldInfo getFieldInfo(int fieldIndex) {
43: return getClassInfo().getInstanceField(fieldIndex);
44: }
45:
46: protected FieldInfo getFieldInfo(String clsBase, String fname) {
47: FieldInfo fi = getClassInfo().getInstanceField(clsBase, fname);
48: if (fi == null) {
49: throw new JPFException("class " + getClassInfo().getName()
50: + " has no field " + fname);
51: }
52: return fi;
53: }
54:
55: protected ElementInfo getElementInfo(ClassInfo ci) {
56: // DynamicElementInfo fields are always flattened, so there is no need to
57: // look up a Fields container
58: return this ;
59: }
60:
61: protected Ref getRef() {
62: return new ObjRef(getIndex());
63: }
64: }
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