The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | package junit.runner; |
| 2 | |
| 3 | import java.util.*; |
| 4 | import java.io.*; |
| 5 | import java.net.URL; |
| 6 | import java.util.zip.*; |
| 7 | |
| 8 | /** |
| 9 | * A custom class loader which enables the reloading |
| 10 | * of classes for each test run. The class loader |
| 11 | * can be configured with a list of package paths that |
| 12 | * should be excluded from loading. The loading |
| 13 | * of these packages is delegated to the system class |
| 14 | * loader. They will be shared across test runs. |
| 15 | * <p> |
| 16 | * The list of excluded package paths is specified in |
Brett Chabot | f1253cd | 2012-01-30 11:29:54 -0800 | [diff] [blame] | 17 | * a properties file "excluded.properties" that is located in |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 18 | * the same place as the TestCaseClassLoader class. |
| 19 | * <p> |
| 20 | * <b>Known limitation:</b> the TestCaseClassLoader cannot load classes |
| 21 | * from jar files. |
| 22 | * {@hide} - Not needed for 1.0 SDK |
| 23 | */ |
| 24 | public class TestCaseClassLoader extends ClassLoader { |
Brett Chabot | f1253cd | 2012-01-30 11:29:54 -0800 | [diff] [blame] | 25 | /** scanned class path */ |
| 26 | private Vector fPathItems; |
| 27 | /** default excluded paths */ |
| 28 | private String[] defaultExclusions= { |
| 29 | "junit.framework.", |
| 30 | "junit.extensions.", |
| 31 | "junit.runner." |
| 32 | }; |
| 33 | /** name of excluded properties file */ |
| 34 | static final String EXCLUDED_FILE= "excluded.properties"; |
| 35 | /** excluded paths */ |
| 36 | private Vector fExcluded; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 37 | |
Brett Chabot | f1253cd | 2012-01-30 11:29:54 -0800 | [diff] [blame] | 38 | /** |
| 39 | * Constructs a TestCaseLoader. It scans the class path |
| 40 | * and the excluded package paths |
| 41 | */ |
| 42 | public TestCaseClassLoader() { |
| 43 | this(System.getProperty("java.class.path")); |
| 44 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 45 | |
Brett Chabot | f1253cd | 2012-01-30 11:29:54 -0800 | [diff] [blame] | 46 | /** |
| 47 | * Constructs a TestCaseLoader. It scans the class path |
| 48 | * and the excluded package paths |
| 49 | */ |
| 50 | public TestCaseClassLoader(String classPath) { |
| 51 | scanPath(classPath); |
| 52 | readExcludedPackages(); |
| 53 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 54 | |
Brett Chabot | f1253cd | 2012-01-30 11:29:54 -0800 | [diff] [blame] | 55 | private void scanPath(String classPath) { |
| 56 | String separator= System.getProperty("path.separator"); |
| 57 | fPathItems= new Vector(10); |
| 58 | StringTokenizer st= new StringTokenizer(classPath, separator); |
| 59 | while (st.hasMoreTokens()) { |
| 60 | fPathItems.addElement(st.nextToken()); |
| 61 | } |
| 62 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 63 | |
Brett Chabot | f1253cd | 2012-01-30 11:29:54 -0800 | [diff] [blame] | 64 | public URL getResource(String name) { |
| 65 | return ClassLoader.getSystemResource(name); |
| 66 | } |
| 67 | |
| 68 | public InputStream getResourceAsStream(String name) { |
| 69 | return ClassLoader.getSystemResourceAsStream(name); |
| 70 | } |
| 71 | |
| 72 | public boolean isExcluded(String name) { |
| 73 | for (int i= 0; i < fExcluded.size(); i++) { |
| 74 | if (name.startsWith((String) fExcluded.elementAt(i))) { |
| 75 | return true; |
| 76 | } |
| 77 | } |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | public synchronized Class loadClass(String name, boolean resolve) |
| 82 | throws ClassNotFoundException { |
| 83 | |
| 84 | Class c= findLoadedClass(name); |
| 85 | if (c != null) |
| 86 | return c; |
| 87 | // |
| 88 | // Delegate the loading of excluded classes to the |
| 89 | // standard class loader. |
| 90 | // |
| 91 | if (isExcluded(name)) { |
| 92 | try { |
| 93 | c= findSystemClass(name); |
| 94 | return c; |
| 95 | } catch (ClassNotFoundException e) { |
| 96 | // keep searching |
| 97 | } |
| 98 | } |
| 99 | if (c == null) { |
| 100 | byte[] data= lookupClassData(name); |
| 101 | if (data == null) |
| 102 | throw new ClassNotFoundException(); |
| 103 | c= defineClass(name, data, 0, data.length); |
| 104 | } |
| 105 | if (resolve) |
| 106 | resolveClass(c); |
| 107 | return c; |
| 108 | } |
| 109 | |
| 110 | private byte[] lookupClassData(String className) throws ClassNotFoundException { |
| 111 | byte[] data= null; |
| 112 | for (int i= 0; i < fPathItems.size(); i++) { |
| 113 | String path= (String) fPathItems.elementAt(i); |
| 114 | String fileName= className.replace('.', '/')+".class"; |
| 115 | if (isJar(path)) { |
| 116 | data= loadJarData(path, fileName); |
| 117 | } else { |
| 118 | data= loadFileData(path, fileName); |
| 119 | } |
| 120 | if (data != null) |
| 121 | return data; |
| 122 | } |
| 123 | throw new ClassNotFoundException(className); |
| 124 | } |
| 125 | |
| 126 | boolean isJar(String pathEntry) { |
| 127 | return pathEntry.endsWith(".jar") || |
| 128 | pathEntry.endsWith(".apk") || |
| 129 | pathEntry.endsWith(".zip"); |
| 130 | } |
| 131 | |
| 132 | private byte[] loadFileData(String path, String fileName) { |
| 133 | File file= new File(path, fileName); |
| 134 | if (file.exists()) { |
| 135 | return getClassData(file); |
| 136 | } |
| 137 | return null; |
| 138 | } |
| 139 | |
| 140 | private byte[] getClassData(File f) { |
| 141 | try { |
| 142 | FileInputStream stream= new FileInputStream(f); |
| 143 | ByteArrayOutputStream out= new ByteArrayOutputStream(1000); |
| 144 | byte[] b= new byte[1000]; |
| 145 | int n; |
| 146 | while ((n= stream.read(b)) != -1) |
| 147 | out.write(b, 0, n); |
| 148 | stream.close(); |
| 149 | out.close(); |
| 150 | return out.toByteArray(); |
| 151 | |
| 152 | } catch (IOException e) { |
| 153 | } |
| 154 | return null; |
| 155 | } |
| 156 | |
| 157 | private byte[] loadJarData(String path, String fileName) { |
| 158 | ZipFile zipFile= null; |
| 159 | InputStream stream= null; |
| 160 | File archive= new File(path); |
| 161 | if (!archive.exists()) |
| 162 | return null; |
| 163 | try { |
| 164 | zipFile= new ZipFile(archive); |
| 165 | } catch(IOException io) { |
| 166 | return null; |
| 167 | } |
| 168 | ZipEntry entry= zipFile.getEntry(fileName); |
| 169 | if (entry == null) |
| 170 | return null; |
| 171 | int size= (int) entry.getSize(); |
| 172 | try { |
| 173 | stream= zipFile.getInputStream(entry); |
| 174 | byte[] data= new byte[size]; |
| 175 | int pos= 0; |
| 176 | while (pos < size) { |
| 177 | int n= stream.read(data, pos, data.length - pos); |
| 178 | pos += n; |
| 179 | } |
| 180 | zipFile.close(); |
| 181 | return data; |
| 182 | } catch (IOException e) { |
| 183 | } finally { |
| 184 | try { |
| 185 | if (stream != null) |
| 186 | stream.close(); |
| 187 | } catch (IOException e) { |
| 188 | } |
| 189 | } |
| 190 | return null; |
| 191 | } |
| 192 | |
| 193 | private void readExcludedPackages() { |
| 194 | fExcluded= new Vector(10); |
| 195 | for (int i= 0; i < defaultExclusions.length; i++) |
| 196 | fExcluded.addElement(defaultExclusions[i]); |
| 197 | |
| 198 | InputStream is= getClass().getResourceAsStream(EXCLUDED_FILE); |
| 199 | if (is == null) |
| 200 | return; |
| 201 | Properties p= new Properties(); |
| 202 | try { |
| 203 | p.load(is); |
| 204 | } |
| 205 | catch (IOException e) { |
| 206 | return; |
| 207 | } finally { |
| 208 | try { |
| 209 | is.close(); |
| 210 | } catch (IOException e) { |
| 211 | } |
| 212 | } |
| 213 | for (Enumeration e= p.propertyNames(); e.hasMoreElements(); ) { |
| 214 | String key= (String)e.nextElement(); |
| 215 | if (key.startsWith("excluded.")) { |
| 216 | String path= p.getProperty(key); |
| 217 | path= path.trim(); |
| 218 | if (path.endsWith("*")) |
| 219 | path= path.substring(0, path.length()-1); |
| 220 | if (path.length() > 0) |
| 221 | fExcluded.addElement(path); |
| 222 | } |
| 223 | } |
| 224 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 225 | } |