2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0.
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
19 package gov.nasa.jpf.vm.serialize;
21 import gov.nasa.jpf.vm.FieldInfo;
22 import gov.nasa.jpf.vm.serialize.AmmendableFilterConfiguration.StaticAmmendment;
24 import java.util.Arrays;
25 import java.util.HashSet;
28 * Marks static final field of primitive or known immutable type to be
29 * filtered. In theory, these could be critical to state, but that would
30 * be highly irregular.
32 * NOTE - final does not really mean constant, so we only ignore fields
33 * here that are initialized from lexical constants, i.e. a constpool entry.
34 * Others might involve data choice generators
37 * Ignoring constants probably isn't beneficial with the FilteringSerializer
38 * but could be a big win with AbstractingSerializer, which garbage-collects
39 * no-longer-reachable objects--that is, garbage collection in its
40 * representation, not in VM.
44 public class IgnoreConstants implements StaticAmmendment {
45 static final HashSet<String> knownImmutables =
46 new HashSet<String>(Arrays.asList(new String[] {
47 "boolean", "byte", "char", "double", "float", "int", "long", "short",
51 "java.lang.Character",
60 public boolean ammendFieldInclusion(FieldInfo fi, boolean sofar) {
62 if (fi.isFinal() && fi.getConstantValue() != null) {
63 if (knownImmutables.contains(fi.getType())) {
67 // otherwise, delegate
72 public static final IgnoreConstants instance = new IgnoreConstants();