Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/util/MethodInfoRegistry.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
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
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
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.
17 */
18
19 package gov.nasa.jpf.util;
20
21 import gov.nasa.jpf.vm.MJIEnv;
22 import gov.nasa.jpf.vm.MethodInfo;
23
24 /**
25 * just a little helper for java.lang.reflect peers
26 *
27 * <2do> - it's overly simplistic for now
28 */
29 public class MethodInfoRegistry {
30
31 final int NREG = 10;
32 MethodInfo[] registered;
33 int nRegistered;
34
35 public MethodInfoRegistry () {
36 registered = new MethodInfo[NREG];
37 nRegistered = 0;
38 }
39
40 public int registerMethodInfo (MethodInfo mi) {
41 int idx;
42
43 for (idx=0; idx < nRegistered; idx++) {
44 if (registered[idx] == mi) {
45 return idx;
46 }
47 }
48
49 if (idx == registered.length) {
50 MethodInfo[] newReg = new MethodInfo[registered.length+NREG];
51 System.arraycopy(registered, 0, newReg, 0, registered.length);
52 registered = newReg;
53 }
54
55 registered[idx] = mi;
56 nRegistered++;
57 return idx;
58 }
59
60 public MethodInfo getRegisteredFieldInfo (int idx) {
61 return registered[idx];
62 }
63
64 public MethodInfo getMethodInfo (MJIEnv env, int objRef, String fieldName) {
65 int idx = env.getIntField( objRef, fieldName);
66
67 assert ((idx >= 0) || (idx < nRegistered)) : "illegal MethodInfo request: " + idx + ", " + nRegistered;
68
69 return registered[idx];
70 }
71
72 }