Mercurial > hg > Members > kono > jpf-core

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