+package be.nikiroo.jvcard.resources;
+
+// code copied from from:
+// http://forums.devx.com/showthread.php?t=153784,
+// via:
+// http://stackoverflow.com/questions/3923129/get-a-list-of-resources-from-classpath-directory
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.regex.Pattern;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipException;
+import java.util.zip.ZipFile;
+
+/**
+ * list resources available from the classpath @ *
+ */
+public class ResourceList {
+
+ /**
+ * for all elements of java.class.path get a Collection of resources Pattern
+ * pattern = Pattern.compile(".*"); gets all resources
+ *
+ * @param pattern
+ * the pattern to match
+ * @return the resources in the order they are found
+ */
+ public static Collection<String> getResources(final Pattern pattern) {
+ final ArrayList<String> retval = new ArrayList<String>();
+ final String classPath = System.getProperty("java.class.path", ".");
+ final String[] classPathElements = classPath.split(System
+ .getProperty("path.separator"));
+ for (final String element : classPathElements) {
+ retval.addAll(getResources(element, pattern));
+ }
+ return retval;
+ }
+
+ private static Collection<String> getResources(final String element,
+ final Pattern pattern) {
+ final ArrayList<String> retval = new ArrayList<String>();
+ final File file = new File(element);
+ if (file.isDirectory()) {
+ retval.addAll(getResourcesFromDirectory(file, pattern));
+ } else {
+ retval.addAll(getResourcesFromJarFile(file, pattern));
+ }
+ return retval;
+ }
+
+ private static Collection<String> getResourcesFromJarFile(final File file,
+ final Pattern pattern) {
+ final ArrayList<String> retval = new ArrayList<String>();
+ ZipFile zf;
+ try {
+ zf = new ZipFile(file);
+ } catch (final ZipException e) {
+ throw new Error(e);
+ } catch (final IOException e) {
+ throw new Error(e);
+ }
+ final Enumeration<? extends ZipEntry> e = zf.entries();
+ while (e.hasMoreElements()) {
+ final ZipEntry ze = (ZipEntry) e.nextElement();
+ final String fileName = ze.getName();
+ final boolean accept = pattern.matcher(fileName).matches();
+ if (accept) {
+ retval.add(fileName);
+ }
+ }
+ try {
+ zf.close();
+ } catch (final IOException e1) {
+ throw new Error(e1);
+ }
+ return retval;
+ }
+
+ private static Collection<String> getResourcesFromDirectory(
+ final File directory, final Pattern pattern) {
+ final ArrayList<String> retval = new ArrayList<String>();
+ final File[] fileList = directory.listFiles();
+ for (final File file : fileList) {
+ if (file.isDirectory()) {
+ retval.addAll(getResourcesFromDirectory(file, pattern));
+ } else {
+ try {
+ final String fileName = file.getCanonicalPath();
+ final boolean accept = pattern.matcher(fileName).matches();
+ if (accept) {
+ retval.add(fileName);
+ }
+ } catch (final IOException e) {
+ throw new Error(e);
+ }
+ }
+ }
+ return retval;
+ }
+
+ /**
+ * list the resources that match args[0]
+ *
+ * @param args
+ * args[0] is the pattern to match, or list all resources if
+ * there are no args
+ */
+ public static void main(final String[] args) {
+ Pattern pattern;
+ if (args.length < 1) {
+ pattern = Pattern.compile(".*");
+ } else {
+ pattern = Pattern.compile(args[0]);
+ }
+ final Collection<String> list = ResourceList.getResources(pattern);
+ for (final String name : list) {
+ System.out.println(name);
+ }
+ }
+}