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annotate src/main/gov/nasa/jpf/JPFClassLoader.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;
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20
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21 import java.io.File;
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22 import java.net.URL;
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23 import java.net.URLClassLoader;
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24
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25 /**
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26 * classloader that is used by Config to instantiate from JPF configured
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27 * paths. This is a standard parent-first loader to avoid multiple class
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28 * instances when using our Run*.jar tools
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29 *
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30 * The main reason for having our own classloader is dynamically configured resource
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31 * and library lookup
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32 */
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33 public class JPFClassLoader extends URLClassLoader {
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34
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35 String[] nativeLibs;
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36
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37
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38 static {
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39 //ClassLoader.registerAsParallelCapable(); // for jdk7
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40 }
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41
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42 public JPFClassLoader (URL[] urls){
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43 super(urls);
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44 }
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45
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46 public JPFClassLoader (URL[] urls, String[] libs, ClassLoader parent){
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47 super(urls, parent);
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48
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49 nativeLibs = libs;
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50 }
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51
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52 @Override
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53 protected String findLibrary (String libBaseName){
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54
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55 if (nativeLibs != null){
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56 String libName = File.separator + System.mapLibraryName(libBaseName);
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57
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58 for (String libPath : nativeLibs) {
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59 if (libPath.endsWith(libName)) {
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60 return libPath;
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61 }
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62 }
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63 }
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64
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65 return null; // means VM uses java.library.path to look it up
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66 }
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67
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68 /**
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69 * we make it public since we add paths dynamically during JPF init
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70 *
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71 * Note this is ignored according to the javadocs if the provided url is already in the classpath.
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72 * We do rely on this feature since me might add jpf.jar several times during bootstrap
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73 */
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74 @Override
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75 public void addURL (URL url){
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76 if (url != null){
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77 super.addURL(url);
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78 }
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79 }
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80
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81 public void setNativeLibs (String[] libs){
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82 nativeLibs = libs;
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83 }
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84 }