| 1 | package be.nikiroo.utils.resources; |
| 2 | |
| 3 | // code copied from from: |
| 4 | // http://forums.devx.com/showthread.php?t=153784, |
| 5 | // via: |
| 6 | // http://stackoverflow.com/questions/3923129/get-a-list-of-resources-from-classpath-directory |
| 7 | |
| 8 | import java.io.File; |
| 9 | import java.io.IOException; |
| 10 | import java.util.ArrayList; |
| 11 | import java.util.Collection; |
| 12 | import java.util.Enumeration; |
| 13 | import java.util.regex.Pattern; |
| 14 | import java.util.zip.ZipEntry; |
| 15 | import java.util.zip.ZipException; |
| 16 | import java.util.zip.ZipFile; |
| 17 | |
| 18 | /** |
| 19 | * list resources available from the classpath @ * |
| 20 | */ |
| 21 | class TransBundle_ResourceList { |
| 22 | |
| 23 | /** |
| 24 | * for all elements of java.class.path get a Collection of resources Pattern |
| 25 | * pattern = Pattern.compile(".*"); gets all resources |
| 26 | * |
| 27 | * @param pattern |
| 28 | * the pattern to match |
| 29 | * @return the resources in the order they are found |
| 30 | */ |
| 31 | public static Collection<String> getResources(final Pattern pattern) { |
| 32 | final ArrayList<String> retval = new ArrayList<String>(); |
| 33 | final String classPath = System.getProperty("java.class.path", "."); |
| 34 | final String[] classPathElements = classPath.split(System |
| 35 | .getProperty("path.separator")); |
| 36 | for (final String element : classPathElements) { |
| 37 | retval.addAll(getResources(element, pattern)); |
| 38 | } |
| 39 | |
| 40 | return retval; |
| 41 | } |
| 42 | |
| 43 | private static Collection<String> getResources(final String element, |
| 44 | final Pattern pattern) { |
| 45 | final ArrayList<String> retval = new ArrayList<String>(); |
| 46 | final File file = new File(element); |
| 47 | if (file.isDirectory()) { |
| 48 | retval.addAll(getResourcesFromDirectory(file, pattern)); |
| 49 | } else { |
| 50 | retval.addAll(getResourcesFromJarFile(file, pattern)); |
| 51 | } |
| 52 | |
| 53 | return retval; |
| 54 | } |
| 55 | |
| 56 | private static Collection<String> getResourcesFromJarFile(final File file, |
| 57 | final Pattern pattern) { |
| 58 | final ArrayList<String> retval = new ArrayList<String>(); |
| 59 | ZipFile zf; |
| 60 | try { |
| 61 | zf = new ZipFile(file); |
| 62 | } catch (final ZipException e) { |
| 63 | throw new Error(e); |
| 64 | } catch (final IOException e) { |
| 65 | throw new Error(e); |
| 66 | } |
| 67 | final Enumeration<? extends ZipEntry> e = zf.entries(); |
| 68 | while (e.hasMoreElements()) { |
| 69 | final ZipEntry ze = (ZipEntry) e.nextElement(); |
| 70 | final String fileName = ze.getName(); |
| 71 | final boolean accept = pattern.matcher(fileName).matches(); |
| 72 | if (accept) { |
| 73 | retval.add(fileName); |
| 74 | } |
| 75 | } |
| 76 | try { |
| 77 | zf.close(); |
| 78 | } catch (final IOException e1) { |
| 79 | throw new Error(e1); |
| 80 | } |
| 81 | |
| 82 | return retval; |
| 83 | } |
| 84 | |
| 85 | private static Collection<String> getResourcesFromDirectory( |
| 86 | final File directory, final Pattern pattern) { |
| 87 | final ArrayList<String> retval = new ArrayList<String>(); |
| 88 | final File[] fileList = directory.listFiles(); |
| 89 | for (final File file : fileList) { |
| 90 | if (file.isDirectory()) { |
| 91 | retval.addAll(getResourcesFromDirectory(file, pattern)); |
| 92 | } else { |
| 93 | try { |
| 94 | final String fileName = file.getCanonicalPath(); |
| 95 | final boolean accept = pattern.matcher(fileName).matches(); |
| 96 | if (accept) { |
| 97 | retval.add(fileName); |
| 98 | } |
| 99 | } catch (final IOException e) { |
| 100 | throw new Error(e); |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | return retval; |
| 106 | } |
| 107 | } |