6092N/A

6092N/A

6092N/Aimport java.io.File;

6092N/Aimport java.io.FileFilter;

6092N/Aimport java.io.FileInputStream;

6092N/Aimport java.io.FileOutputStream;

6092N/Aimport java.io.RandomAccessFile;

6092N/Aimport java.io.FileNotFoundException;

6092N/Aimport java.io.FilenameFilter;

6092N/Aimport java.io.IOException;

6092N/Aimport java.net.MalformedURLException;

6092N/Aimport java.nio.file.InvalidPathException;

6092N/Aimport java.io.ByteArrayInputStream;

6092N/Aimport java.io.ByteArrayOutputStream;

6092N/Aimport java.io.ObjectOutputStream;

6092N/Aimport java.io.ObjectInputStream;

6092N/A

6092N/Apublic class NulFile {

6092N/A

6092N/A private static final char CHAR_NUL = '\u0000';

6092N/A

6092N/A private static final String ExceptionMsg = "Invalid file path";

6092N/A

6092N/A public static void main(String[] args) {

6092N/A testFile();

6092N/A testFileInUnix();

6092N/A testFileInWindows();

6092N/A testTempFile();

6092N/A }

6092N/A

6092N/A private static void testFile() {

6092N/A test(new File(new StringBuilder().append(CHAR_NUL).toString()));

6092N/A test(new File(

6092N/A new StringBuilder().append("").append(CHAR_NUL).toString()));

6092N/A test(new File(

6092N/A new StringBuilder().append(CHAR_NUL).append("").toString()));

6092N/A }

6092N/A

6092N/A private static void testFileInUnix() {

6092N/A String osName = System.getProperty("os.name");

6092N/A if (osName.startsWith("Windows"))

6092N/A return;

6092N/A

6092N/A String unixFile = "/";

6092N/A test(unixFile);

6092N/A

6092N/A unixFile = "//";

6092N/A test(unixFile);

6092N/A

6092N/A unixFile = "data/info";

6092N/A test(unixFile);

6092N/A

6092N/A unixFile = "/data/info";

6092N/A test(unixFile);

6092N/A

6092N/A unixFile = "//data//info";

6092N/A test(unixFile);

6092N/A }

6092N/A

6092N/A private static void testFileInWindows() {

6092N/A String osName = System.getProperty("os.name");

6092N/A if (!osName.startsWith("Windows"))

6092N/A return;

6092N/A

6092N/A String windowsFile = "\\";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "\\\\";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "/";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "//";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "/\\";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "\\/";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "data\\info";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "\\data\\info";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "\\\\server\\data\\info";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "z:data\\info";

6092N/A test(windowsFile);

6092N/A

6092N/A windowsFile = "z:\\data\\info";

6092N/A test(windowsFile);

6092N/A }

6092N/A

6092N/A private static void test(final String name) {

6092N/A int length = name.length();

6092N/A

6092N/A for (int i = 0; i <= length; i++) {

6092N/A StringBuilder sbName = new StringBuilder(name);

6092N/A sbName.insert(i, CHAR_NUL);

6092N/A String curName = sbName.toString();

6092N/A

6092N/A // test File(String parent, String child)

6092N/A File testFile = new File(curName, "child");

6092N/A test(testFile);

6092N/A testFile = new File("parent", curName);

6092N/A test(testFile);

6092N/A

6092N/A // test File(String pathname)

6092N/A testFile = new File(curName);

6092N/A test(testFile);

6092N/A

6092N/A // test File(File parent, String child)

6092N/A testFile = new File(new File(curName), "child");

6092N/A test(testFile);

6092N/A testFile = new File(new File("parent"), curName);

6092N/A test(testFile);

6092N/A

6092N/A // test FileInputStream

6092N/A testFileInputStream(curName);

6092N/A

6092N/A // test FileOutputStream

6092N/A testFileOutputStream(curName);

6092N/A

6092N/A // test RandomAccessFile

6092N/A testRandomAccessFile(curName);

6092N/A }

6092N/A }

6092N/A

6092N/A private static void testFileInputStream(final String str) {

6092N/A boolean exceptionThrown = false;

6092N/A FileInputStream is = null;

6092N/A try {

6092N/A is = new FileInputStream(str);

6092N/A } catch (FileNotFoundException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("FileInputStream constructor"

6092N/A + " should throw FileNotFoundException");

6092N/A }

6092N/A if (is != null) {

6092N/A throw new RuntimeException("FileInputStream constructor"

6092N/A + " should fail");

6092N/A }

6092N/A

6092N/A exceptionThrown = false;

6092N/A is = null;

6092N/A try {

6092N/A is = new FileInputStream(new File(str));

6092N/A } catch (FileNotFoundException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("FileInputStream constructor"

6092N/A + " should throw FileNotFoundException");

6092N/A }

6092N/A if (is != null) {

6092N/A throw new RuntimeException("FileInputStream constructor"

6092N/A + " should fail");

6092N/A }

6092N/A }

6092N/A

6092N/A private static void testFileOutputStream(final String str) {

6092N/A boolean exceptionThrown = false;

6092N/A FileOutputStream os = null;

6092N/A try {

6092N/A os = new FileOutputStream(str);

6092N/A } catch (FileNotFoundException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("FileOutputStream constructor"

6092N/A + " should throw FileNotFoundException");

6092N/A }

6092N/A if (os != null) {

6092N/A throw new RuntimeException("FileOutputStream constructor"

6092N/A + " should fail");

6092N/A }

6092N/A

6092N/A exceptionThrown = false;

6092N/A os = null;

6092N/A try {

6092N/A os = new FileOutputStream(new File(str));

6092N/A } catch (FileNotFoundException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("FileOutputStream constructor"

6092N/A + " should throw FileNotFoundException");

6092N/A }

6092N/A if (os != null) {

6092N/A throw new RuntimeException("FileOutputStream constructor"

6092N/A + " should fail");

6092N/A }

6092N/A }

6092N/A

6092N/A private static void testRandomAccessFile(final String str) {

6092N/A boolean exceptionThrown = false;

6092N/A RandomAccessFile raf = null;

6092N/A String[] modes = {"r", "rw", "rws", "rwd"};

6092N/A

6092N/A for (String mode : modes) {

6092N/A try {

6092N/A raf = new RandomAccessFile(str, mode);

6092N/A } catch (FileNotFoundException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("RandomAccessFile constructor"

6092N/A + " should throw FileNotFoundException");

6092N/A }

6092N/A if (raf != null) {

6092N/A throw new RuntimeException("RandomAccessFile constructor"

6092N/A + " should fail");

6092N/A }

6092N/A

6092N/A exceptionThrown = false;

6092N/A raf = null;

6092N/A try {

6092N/A raf = new RandomAccessFile(new File(str), mode);

6092N/A } catch (FileNotFoundException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("RandomAccessFile constructor"

6092N/A + " should throw FileNotFoundException");

6092N/A }

6092N/A if (raf != null) {

6092N/A throw new RuntimeException("RandomAccessFile constructor"

6092N/A + " should fail");

6092N/A }

6092N/A }

6092N/A }

6092N/A

6092N/A private static void test(File testFile) {

6092N/A test(testFile, false);

6092N/A // test serialization

6092N/A testSerialization(testFile);

6092N/A }

6092N/A

6092N/A @SuppressWarnings("deprecation")

6092N/A private static void test(File testFile, boolean derived) {

6092N/A boolean exceptionThrown = false;

6092N/A

6092N/A if (testFile == null) {

6092N/A throw new RuntimeException("test file should not be null.");

6092N/A }

6092N/A

6092N/A // getPath()

6092N/A if (testFile.getPath().indexOf(CHAR_NUL) < 0) {

6092N/A throw new RuntimeException(

6092N/A "File path should contain Nul character");

6092N/A }

6092N/A // getAbsolutePath()

6092N/A if (testFile.getAbsolutePath().indexOf(CHAR_NUL) < 0) {

6092N/A throw new RuntimeException(

6092N/A "File absolute path should contain Nul character");

6092N/A }

6092N/A // getAbsoluteFile()

6092N/A File derivedAbsFile = testFile.getAbsoluteFile();

6092N/A if (derived) {

6092N/A if (derivedAbsFile.getPath().indexOf(CHAR_NUL) < 0) {

6092N/A throw new RuntimeException(

6092N/A "Derived file path should also contain Nul character");

6092N/A }

6092N/A } else {

6092N/A test(derivedAbsFile, true);

6092N/A }

6092N/A // getCanonicalPath()

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.getCanonicalPath();

6092N/A } catch (IOException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException(

6092N/A "getCanonicalPath() should throw IOException with"

6092N/A + " message \"" + ExceptionMsg + "\"");

6092N/A }

6092N/A // getCanonicalFile()

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.getCanonicalFile();

6092N/A } catch (IOException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException(

6092N/A "getCanonicalFile() should throw IOException with"

6092N/A + " message \"" + ExceptionMsg + "\"");

6092N/A }

6092N/A // toURL()

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.toURL();

6092N/A } catch (MalformedURLException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("toURL() should throw IOException with"

6092N/A + " message \"" + ExceptionMsg + "\"");

6092N/A }

6092N/A // canRead()

6092N/A if (testFile.canRead())

6092N/A throw new RuntimeException("File should not be readable");

6092N/A // canWrite()

6092N/A if (testFile.canWrite())

6092N/A throw new RuntimeException("File should not be writable");

6092N/A // exists()

6092N/A if (testFile.exists())

6092N/A throw new RuntimeException("File should not be existed");

6092N/A // isDirectory()

6092N/A if (testFile.isDirectory())

6092N/A throw new RuntimeException("File should not be a directory");

6092N/A // isFile()

6092N/A if (testFile.isFile())

6092N/A throw new RuntimeException("File should not be a file");

6092N/A // isHidden()

6092N/A if (testFile.isHidden())

6092N/A throw new RuntimeException("File should not be hidden");

6092N/A // lastModified()

6092N/A if (testFile.lastModified() != 0L)

6092N/A throw new RuntimeException("File last modified time should be 0L");

6092N/A // length()

6092N/A if (testFile.length() != 0L)

6092N/A throw new RuntimeException("File length should be 0L");

6092N/A // createNewFile()

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.createNewFile();

6092N/A } catch (IOException ex) {

6092N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException(

6092N/A "createNewFile() should throw IOException with"

6092N/A + " message \"" + ExceptionMsg + "\"");

6092N/A }

6092N/A // delete()

6092N/A if (testFile.delete())

6092N/A throw new RuntimeException("Delete operation should fail");

6092N/A // list()

6092N/A if (testFile.list() != null)

6092N/A throw new RuntimeException("File list() should return null");

6092N/A // list(FilenameFilter)

6092N/A FilenameFilter fnFilter = new FilenameFilter() {

6092N/A @Override

6092N/A public boolean accept(File dir, String name) {

6092N/A return false;

6092N/A }

6092N/A };

6092N/A if (testFile.list(fnFilter) != null) {

6092N/A throw new RuntimeException("File list(FilenameFilter) should"

6092N/A + " return null");

6092N/A }

6092N/A // listFiles()

6092N/A if (testFile.listFiles() != null)

6092N/A throw new RuntimeException("File listFiles() should return null");

6092N/A // listFiles(FilenameFilter)

6092N/A if (testFile.listFiles(fnFilter) != null) {

6092N/A throw new RuntimeException("File listFiles(FilenameFilter)"

6092N/A + " should return null");

6092N/A }

6092N/A // listFiles(FileFilter)

6092N/A FileFilter fFilter = new FileFilter() {

6092N/A @Override

6092N/A public boolean accept(File file) {

6092N/A return false;

6092N/A }

6092N/A };

6092N/A if (testFile.listFiles(fFilter) != null) {

6092N/A throw new RuntimeException("File listFiles(FileFilter)"

6092N/A + " should return null");

6092N/A }

6092N/A // mkdir()

6092N/A if (testFile.mkdir()) {

6092N/A throw new RuntimeException("File should not be able to"

6092N/A + " create directory");

6092N/A }

6092N/A // mkdirs()

6092N/A if (testFile.mkdirs()) {

6092N/A throw new RuntimeException("File should not be able to"

6092N/A + " create directories");

6092N/A }

6092N/A // renameTo(File)

6092N/A if (testFile.renameTo(new File("dest")))

6092N/A throw new RuntimeException("File rename should fail");

6092N/A if (new File("dest").renameTo(testFile))

6092N/A throw new RuntimeException("File rename should fail");

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.renameTo(null);

6092N/A } catch (NullPointerException ex) {

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("File rename should thrown NPE");

6092N/A }

6092N/A // setLastModified(long)

6092N/A if (testFile.setLastModified(0L)) {

6092N/A throw new RuntimeException("File should fail to set"

6092N/A + " last modified time");

6092N/A }

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.setLastModified(-1);

6092N/A } catch (IllegalArgumentException ex) {

6092N/A if ("Negative time".equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("File should fail to set"

6092N/A + " last modified time with message \"Negative time\"");

6092N/A }

6092N/A // setReadOnly()

6092N/A if (testFile.setReadOnly())

6092N/A throw new RuntimeException("File should fail to set read-only");

6092N/A // setWritable(boolean writable, boolean ownerOnly)

6092N/A if (testFile.setWritable(true, true))

6092N/A throw new RuntimeException("File should fail to set writable");

6092N/A if (testFile.setWritable(true, false))

6092N/A throw new RuntimeException("File should fail to set writable");

6092N/A if (testFile.setWritable(false, true))

6092N/A throw new RuntimeException("File should fail to set writable");

6092N/A if (testFile.setWritable(false, false))

6092N/A throw new RuntimeException("File should fail to set writable");

6092N/A // setWritable(boolean writable)

6092N/A if (testFile.setWritable(false))

6092N/A throw new RuntimeException("File should fail to set writable");

6092N/A if (testFile.setWritable(true))

6092N/A throw new RuntimeException("File should fail to set writable");

6092N/A // setReadable(boolean readable, boolean ownerOnly)

6092N/A if (testFile.setReadable(true, true))

6092N/A throw new RuntimeException("File should fail to set readable");

6092N/A if (testFile.setReadable(true, false))

6092N/A throw new RuntimeException("File should fail to set readable");

6092N/A if (testFile.setReadable(false, true))

6092N/A throw new RuntimeException("File should fail to set readable");

6092N/A if (testFile.setReadable(false, false))

6092N/A throw new RuntimeException("File should fail to set readable");

6092N/A // setReadable(boolean readable)

6092N/A if (testFile.setReadable(false))

6092N/A throw new RuntimeException("File should fail to set readable");

6092N/A if (testFile.setReadable(true))

6092N/A throw new RuntimeException("File should fail to set readable");

6092N/A // setExecutable(boolean executable, boolean ownerOnly)

6092N/A if (testFile.setExecutable(true, true))

6092N/A throw new RuntimeException("File should fail to set executable");

6092N/A if (testFile.setExecutable(true, false))

6092N/A throw new RuntimeException("File should fail to set executable");

6092N/A if (testFile.setExecutable(false, true))

6092N/A throw new RuntimeException("File should fail to set executable");

6092N/A if (testFile.setExecutable(false, false))

6092N/A throw new RuntimeException("File should fail to set executable");

6092N/A // setExecutable(boolean executable)

6092N/A if (testFile.setExecutable(false))

6092N/A throw new RuntimeException("File should fail to set executable");

6092N/A if (testFile.setExecutable(true))

6092N/A throw new RuntimeException("File should fail to set executable");

6092N/A // canExecute()

6092N/A if (testFile.canExecute())

6092N/A throw new RuntimeException("File should not be executable");

6092N/A // getTotalSpace()

6092N/A if (testFile.getTotalSpace() != 0L)

6092N/A throw new RuntimeException("The total space should be 0L");

6092N/A // getFreeSpace()

6092N/A if (testFile.getFreeSpace() != 0L)

6092N/A throw new RuntimeException("The free space should be 0L");

6092N/A // getUsableSpace()

6092N/A if (testFile.getUsableSpace() != 0L)

6092N/A throw new RuntimeException("The usable space should be 0L");

6092N/A // compareTo(File null)

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.compareTo(null);

6092N/A } catch (NullPointerException ex) {

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("compareTo(null) should throw NPE");

6092N/A }

6092N/A // toString()

6092N/A if (testFile.toString().indexOf(CHAR_NUL) < 0) {

6092N/A throw new RuntimeException(

6092N/A "File path should contain Nul character");

6092N/A }

6092N/A // toPath()

6092N/A try {

6092N/A exceptionThrown = false;

6092N/A testFile.toPath();

6092N/A } catch (InvalidPathException ex) {

6092N/A exceptionThrown = true;

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("toPath() should throw"

6092N/A + " InvalidPathException");

6092N/A }

6092N/A }

6092N/A

6092N/A private static void testSerialization(File testFile) {

6092N/A String path = testFile.getPath();

6092N/A try {

6092N/A // serialize test file

6092N/A ByteArrayOutputStream baos = new ByteArrayOutputStream();

6092N/A ObjectOutputStream oos = new ObjectOutputStream(baos);

6092N/A oos.writeObject(testFile);

6092N/A oos.close();

6092N/A // deserialize test file

6092N/A byte[] bytes = baos.toByteArray();

6092N/A ByteArrayInputStream is = new ByteArrayInputStream(bytes);

6092N/A ObjectInputStream ois = new ObjectInputStream(is);

6092N/A File newFile = (File) ois.readObject();

6092N/A // test

6092N/A String newPath = newFile.getPath();

6092N/A if (!path.equals(newPath)) {

6092N/A throw new RuntimeException(

6092N/A "Serialization should not change file path");

6092N/A }

6092N/A test(newFile, false);

6092N/A } catch (IOException | ClassNotFoundException ex) {

6092N/A System.err.println("Exception happens in testSerialization");

6092N/A System.err.println(ex.getMessage());

6092N/A }

6092N/A }

6092N/A

6092N/A private static void testTempFile() {

6092N/A final String[] names = {"x", "xx", "xxx", "xxxx"};

6092N/A final String shortPrefix = "sp";

6092N/A final String prefix = "prefix";

6092N/A final String suffix = "suffix";

6092N/A File tmpDir = new File("tmpDir");

6092N/A

6092N/A for (String name : names) {

6092N/A int length = name.length();

6092N/A for (int i = 0; i <= length; i++) {

6092N/A StringBuilder sbName = new StringBuilder(name);

6092N/A sbName.insert(i, CHAR_NUL);

6092N/A String curName = sbName.toString();

6092N/A

6092N/A // test prefix

6092N/A testCreateTempFile(curName, suffix, tmpDir);

6092N/A // test suffix

6092N/A testCreateTempFile(shortPrefix, curName, tmpDir);

6092N/A testCreateTempFile(prefix, curName, tmpDir);

6092N/A // test directory

6092N/A testCreateTempFile(shortPrefix, suffix, new File(curName));

6092N/A testCreateTempFile(prefix, suffix, new File(curName));

6092N/A }

6092N/A }

6092N/A }

6092N/A

6092N/A private static void testCreateTempFile(String prefix, String suffix,

6092N/A File directory) {

6092N/A // createTempFile(String prefix, String suffix, File directory)

6092N/A boolean exceptionThrown = false;

6092N/A boolean shortPrefix = (prefix.length() < 3);

6092N/A if (shortPrefix) {

6092N/A try {

6092N/A File.createTempFile(prefix, suffix, directory);

6092N/A } catch (IllegalArgumentException ex) {

6092N/A if ("Prefix string too short".equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A } catch (IOException ioe) {

6092N/A System.err.println("IOException happens in testCreateTempFile");

6092N/A System.err.println(ioe.getMessage());

6092N/A }

6092N/A } else {

6092N/A try {

6092N/A File.createTempFile(prefix, suffix, directory);

6092N/A } catch (IOException ex) {

6156N/A if (ExceptionMsg.equals(ex.getMessage()))

6092N/A exceptionThrown = true;

6092N/A }

6092N/A }

6092N/A if (!exceptionThrown) {

6092N/A throw new RuntimeException("createTempFile() should throw"

6092N/A + (shortPrefix ? " IllegalArgumentException"

6092N/A : " IOException"));

6092N/A }

6092N/A }

6092N/A}