# HG changeset patch
# User sherman
# Date 1424990443 28800
# Node ID c748c18fb05c6970ac384035638a6fa5df7f684e
# Parent  052f0685cff4a6e5050b4b957d4778e424594396
8073924: Update test/java/nio/charset/Charset/NIOCharsetAvailability.java to work with module system
Summary: to use module's runtime filesystem to iterate the class files
Reviewed-by: alanb

diff -r 052f0685cff4 -r c748c18fb05c jdk/test/java/nio/charset/Charset/NIOCharsetAvailabilityTest.java
--- a/jdk/test/java/nio/charset/Charset/NIOCharsetAvailabilityTest.java	Thu Feb 26 16:29:49 2015 +0000
+++ b/jdk/test/java/nio/charset/Charset/NIOCharsetAvailabilityTest.java	Thu Feb 26 14:40:43 2015 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,41 +23,63 @@
 
 /*
  * @test
- * @bug 4777124 6920545 6911753
+ * @bug 4777124 6920545 6911753 8073924
  * @summary Verify that all Charset subclasses are available through the API
  */
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.IOException;
+import java.net.URI;
 import java.nio.charset.Charset;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
-import java.util.Collection;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.HashSet;
-import java.util.Iterator;
 import java.util.Set;
-import java.util.Vector;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipInputStream;
-
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 public class NIOCharsetAvailabilityTest {
 
     public static void main(String[] args) throws Exception {
+
         // build the set of all Charset subclasses in the
         // two known charset implementation packages
-        Set charsets = new HashSet();
-        addCharsets(charsets, "sun.nio.cs");
-        addCharsets(charsets, "sun.nio.cs.ext");
-
+        FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
+        Set<Class> charsets =
+            Stream.concat(Files.walk(fs.getPath("/java.base/sun/nio/cs/")),
+                          Files.walk(fs.getPath("/jdk.charsets/sun/nio/cs/ext/")))
+                 .map( p -> p.subpath(1, p.getNameCount()).toString())
+                 .filter( s ->  s.indexOf("$") == -1 && s.endsWith(".class"))
+                 .map( s -> {
+                     try {
+                         return Class.forName(s.substring(0, s.length() - 6)
+                                               .replace('/', '.'));
+                     } catch (Exception x) {
+                         throw new RuntimeException(x);
+                     }
+                  })
+                 .filter( clz -> {
+                     Class superclazz = clz.getSuperclass();
+                     while (superclazz != null && !superclazz.equals(Object.class)) {
+                         if (superclazz.equals(Charset.class)) {
+                             return true;
+                         } else {
+                             superclazz = superclazz.getSuperclass();
+                         }
+                     }
+                     return false;
+                  })
+                 .collect(Collectors.toCollection(HashSet::new));
         // remove the charsets that the API says are available
-        Collection availableCharsets = Charset.availableCharsets().values();
-        Iterator iter = availableCharsets.iterator();
-        while (iter.hasNext()) {
-            charsets.remove(((Charset) iter.next()).getClass());
-        }
+        Charset.availableCharsets()
+               .values()
+               .stream()
+               .forEach(cs -> {
+                   if (!charsets.contains(cs.getClass())) {
+                       System.out.println(" missing -> " + cs.getClass());
+                   }
+                   charsets.remove(cs.getClass());
+                });
 
         // remove the known pseudo-charsets that serve only to implement
         // other charsets, but shouldn't be known to the public
@@ -76,146 +98,12 @@
             charsets.remove(Class.forName("sun.nio.cs.JIS_X_0208_Solaris"));
             charsets.remove(Class.forName("sun.nio.cs.JIS_X_0212_Solaris"));
         }
-
         // report the charsets that are implemented but not available
-        iter = charsets.iterator();
-        while (iter.hasNext()) {
-            System.out.println("Unused Charset subclass: " + ((Class) iter.next()).getName());
-        }
         if (charsets.size() > 0) {
+            charsets.stream()
+                    .forEach( clz ->
+                        System.out.println("Unused Charset subclass: " + clz));
             throw new RuntimeException();
         }
     }
-
-    private static Vector classPathSegments = new Vector();
-
-    private static void addCharsets(Set charsets, final String packageName)
-            throws Exception {
-
-        String classPath = AccessController.doPrivileged(
-             (PrivilegedAction<String>)() -> System.getProperty("sun.boot.class.path"));
-        String s = AccessController.doPrivileged(
-             (PrivilegedAction<String>)() -> System.getProperty("java.class.path"));
-
-        // Search combined system and application class path
-        if (s != null && s.length() != 0) {
-            classPath += File.pathSeparator + s;
-        }
-        while (classPath != null && classPath.length() != 0) {
-            int i = classPath.lastIndexOf(java.io.File.pathSeparatorChar);
-            String dir = classPath.substring(i + 1);
-            if (i == -1) {
-                classPath = null;
-            } else {
-                classPath = classPath.substring(0, i);
-            }
-            classPathSegments.insertElementAt(dir, 0);
-        }
-
-        String[] classList = (String[])
-            java.security.AccessController.doPrivileged(
-                                    new java.security.PrivilegedAction() {
-                public Object run() {
-                    return getClassList(packageName, "");
-                }
-            });
-
-        for (int i = 0; i < classList.length; i++) {
-            try {
-                Class clazz = Class.forName(packageName + "." + classList[i]);
-                Class superclazz = clazz.getSuperclass();
-                while (superclazz != null && !superclazz.equals(Object.class)) {
-                    if (superclazz.equals(Charset.class)) {
-                        charsets.add(clazz);
-                        break;
-                    } else {
-                        superclazz = superclazz.getSuperclass();
-                    }
-                }
-            } catch (ClassNotFoundException e) {
-            }
-        }
-    }
-
-    private static final char ZIPSEPARATOR = '/';
-
-    /**
-     * Walk through CLASSPATH and find class list from a package.
-     * The class names start with prefix string
-     * @param package name, class name prefix
-     * @return class list in an array of String
-     */
-    private static String[] getClassList(String pkgName, String prefix) {
-        Vector listBuffer = new Vector();
-        String packagePath = pkgName.replace('.', File.separatorChar)
-            + File.separatorChar;
-        String zipPackagePath = pkgName.replace('.', ZIPSEPARATOR)
-            + ZIPSEPARATOR;
-        for (int i = 0; i < classPathSegments.size(); i++){
-            String onePath = (String) classPathSegments.elementAt(i);
-            File f = new File(onePath);
-            if (!f.exists())
-                continue;
-            if (f.isFile())
-                scanFile(f, zipPackagePath, listBuffer, prefix);
-            else if (f.isDirectory()) {
-                String fullPath;
-                if (onePath.endsWith(File.separator))
-                    fullPath = onePath + packagePath;
-                else
-                    fullPath = onePath + File.separatorChar + packagePath;
-                File dir = new File(fullPath);
-                if (dir.exists() && dir.isDirectory())
-                    scanDir(dir, listBuffer, prefix);
-            }
-        }
-        String[] classNames = new String[listBuffer.size()];
-        listBuffer.copyInto(classNames);
-        return classNames;
-    }
-
-    private static void addClass (String className, Vector listBuffer, String prefix) {
-        if (className != null && className.startsWith(prefix)
-                    && !listBuffer.contains(className))
-            listBuffer.addElement(className);
-    }
-
-    private static String midString(String str, String pre, String suf) {
-        String midStr;
-        if (str.startsWith(pre) && str.endsWith(suf))
-            midStr = str.substring(pre.length(), str.length() - suf.length());
-        else
-            midStr = null;
-        return midStr;
-    }
-
-    private static void scanDir(File dir, Vector listBuffer, String prefix) {
-        String[] fileList = dir.list();
-        for (int i = 0; i < fileList.length; i++) {
-            addClass(midString(fileList[i], "", ".class"), listBuffer, prefix);
-        }
-    }
-
-    private static void scanFile(File f, String packagePath, Vector listBuffer,
-                String prefix) {
-        try {
-            ZipInputStream zipFile = new ZipInputStream(new FileInputStream(f));
-            ZipEntry entry;
-            while ((entry = zipFile.getNextEntry()) != null) {
-                String eName = entry.getName();
-                if (eName.startsWith(packagePath)) {
-                    if (eName.endsWith(".class")) {
-                        addClass(midString(eName, packagePath, ".class"),
-                                listBuffer, prefix);
-                    }
-                }
-            }
-        } catch (FileNotFoundException e) {
-            System.out.println("file not found:" + e);
-        } catch (IOException e) {
-            System.out.println("file IO Exception:" + e);
-        } catch (Exception e) {
-            System.out.println("Exception:" + e);
-        }
-    }
 }