Mercurial > hg > Members > kono > jpf-core

annotate 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 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18
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19 package gov.nasa.jpf.util;
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20
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21 import gov.nasa.jpf.vm.MJIEnv;
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22 import gov.nasa.jpf.vm.MethodInfo;
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23
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24 /**
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25 * just a little helper for java.lang.reflect peers
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26 *
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27 * <2do> - it's overly simplistic for now
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28 */
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29 public class MethodInfoRegistry {
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30
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31 final int NREG = 10;
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32 MethodInfo[] registered;
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33 int nRegistered;
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34
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35 public MethodInfoRegistry () {
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36 registered = new MethodInfo[NREG];
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37 nRegistered = 0;
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38 }
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39
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40 public int registerMethodInfo (MethodInfo mi) {
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41 int idx;
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42
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43 for (idx=0; idx < nRegistered; idx++) {
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44 if (registered[idx] == mi) {
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45 return idx;
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46 }
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47 }
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48
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49 if (idx == registered.length) {
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50 MethodInfo[] newReg = new MethodInfo[registered.length+NREG];
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51 System.arraycopy(registered, 0, newReg, 0, registered.length);
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52 registered = newReg;
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53 }
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54
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55 registered[idx] = mi;
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56 nRegistered++;
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57 return idx;
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58 }
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59
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60 public MethodInfo getRegisteredFieldInfo (int idx) {
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61 return registered[idx];
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62 }
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63
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64 public MethodInfo getMethodInfo (MJIEnv env, int objRef, String fieldName) {
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65 int idx = env.getIntField( objRef, fieldName);
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66
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67 assert ((idx >= 0) || (idx < nRegistered)) : "illegal MethodInfo request: " + idx + ", " + nRegistered;
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68
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69 return registered[idx];
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70 }
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71
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72 }