diff options
Diffstat (limited to 'openjdk/sun/nio/fs/UnixUriUtils.java')
-rw-r--r-- | openjdk/sun/nio/fs/UnixUriUtils.java | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/openjdk/sun/nio/fs/UnixUriUtils.java b/openjdk/sun/nio/fs/UnixUriUtils.java new file mode 100644 index 00000000..8a5d1436 --- /dev/null +++ b/openjdk/sun/nio/fs/UnixUriUtils.java @@ -0,0 +1,249 @@ +/* + * Copyright (c) 2008, 2011, 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 + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package sun.nio.fs; + +import java.nio.file.Path; +import java.io.File; +import java.net.URI; +import java.net.URISyntaxException; +import java.util.Arrays; + +/** + * Unix specific Path <--> URI conversion + */ + +class UnixUriUtils { + private UnixUriUtils() { } + + /** + * Converts URI to Path + */ + static Path fromUri(UnixFileSystem fs, URI uri) { + if (!uri.isAbsolute()) + throw new IllegalArgumentException("URI is not absolute"); + if (uri.isOpaque()) + throw new IllegalArgumentException("URI is not hierarchical"); + String scheme = uri.getScheme(); + if ((scheme == null) || !scheme.equalsIgnoreCase("file")) + throw new IllegalArgumentException("URI scheme is not \"file\""); + if (uri.getAuthority() != null) + throw new IllegalArgumentException("URI has an authority component"); + if (uri.getFragment() != null) + throw new IllegalArgumentException("URI has a fragment component"); + if (uri.getQuery() != null) + throw new IllegalArgumentException("URI has a query component"); + + // compatability with java.io.File + if (!uri.toString().startsWith("file:///")) + return new File(uri).toPath(); + + // transformation use raw path + String p = uri.getRawPath(); + int len = p.length(); + if (len == 0) + throw new IllegalArgumentException("URI path component is empty"); + + // transform escaped octets and unescaped characters to bytes + if (p.endsWith("/") && len > 1) + len--; + byte[] result = new byte[len]; + int rlen = 0; + int pos = 0; + while (pos < len) { + char c = p.charAt(pos++); + byte b; + if (c == '%') { + assert (pos+2) <= len; + char c1 = p.charAt(pos++); + char c2 = p.charAt(pos++); + b = (byte)((decode(c1) << 4) | decode(c2)); + if (b == 0) + throw new IllegalArgumentException("Nul character not allowed"); + } else { + assert c < 0x80; + b = (byte)c; + } + result[rlen++] = b; + } + if (rlen != result.length) + result = Arrays.copyOf(result, rlen); + + return new UnixPath(fs, result); + } + + /** + * Converts Path to URI + */ + static URI toUri(UnixPath up) { + byte[] path = up.toAbsolutePath().asByteArray(); + StringBuilder sb = new StringBuilder("file:///"); + assert path[0] == '/'; + for (int i=1; i<path.length; i++) { + char c = (char)(path[i] & 0xff); + if (match(c, L_PATH, H_PATH)) { + sb.append(c); + } else { + sb.append('%'); + sb.append(hexDigits[(c >> 4) & 0x0f]); + sb.append(hexDigits[(c) & 0x0f]); + } + } + + // trailing slash if directory + if (sb.charAt(sb.length()-1) != '/') { + try { + if (UnixFileAttributes.get(up, true).isDirectory()) + sb.append('/'); + } catch (UnixException x) { + // ignore + } + } + + try { + return new URI(sb.toString()); + } catch (URISyntaxException x) { + throw new AssertionError(x); // should not happen + } + } + + // The following is copied from java.net.URI + + // Compute the low-order mask for the characters in the given string + private static long lowMask(String chars) { + int n = chars.length(); + long m = 0; + for (int i = 0; i < n; i++) { + char c = chars.charAt(i); + if (c < 64) + m |= (1L << c); + } + return m; + } + + // Compute the high-order mask for the characters in the given string + private static long highMask(String chars) { + int n = chars.length(); + long m = 0; + for (int i = 0; i < n; i++) { + char c = chars.charAt(i); + if ((c >= 64) && (c < 128)) + m |= (1L << (c - 64)); + } + return m; + } + + // Compute a low-order mask for the characters + // between first and last, inclusive + private static long lowMask(char first, char last) { + long m = 0; + int f = Math.max(Math.min(first, 63), 0); + int l = Math.max(Math.min(last, 63), 0); + for (int i = f; i <= l; i++) + m |= 1L << i; + return m; + } + + // Compute a high-order mask for the characters + // between first and last, inclusive + private static long highMask(char first, char last) { + long m = 0; + int f = Math.max(Math.min(first, 127), 64) - 64; + int l = Math.max(Math.min(last, 127), 64) - 64; + for (int i = f; i <= l; i++) + m |= 1L << i; + return m; + } + + // Tell whether the given character is permitted by the given mask pair + private static boolean match(char c, long lowMask, long highMask) { + if (c < 64) + return ((1L << c) & lowMask) != 0; + if (c < 128) + return ((1L << (c - 64)) & highMask) != 0; + return false; + } + + // decode + private static int decode(char c) { + if ((c >= '0') && (c <= '9')) + return c - '0'; + if ((c >= 'a') && (c <= 'f')) + return c - 'a' + 10; + if ((c >= 'A') && (c <= 'F')) + return c - 'A' + 10; + throw new AssertionError(); + } + + // digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | + // "8" | "9" + private static final long L_DIGIT = lowMask('0', '9'); + private static final long H_DIGIT = 0L; + + // upalpha = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | + // "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | + // "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z" + private static final long L_UPALPHA = 0L; + private static final long H_UPALPHA = highMask('A', 'Z'); + + // lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | + // "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | + // "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z" + private static final long L_LOWALPHA = 0L; + private static final long H_LOWALPHA = highMask('a', 'z'); + + // alpha = lowalpha | upalpha + private static final long L_ALPHA = L_LOWALPHA | L_UPALPHA; + private static final long H_ALPHA = H_LOWALPHA | H_UPALPHA; + + // alphanum = alpha | digit + private static final long L_ALPHANUM = L_DIGIT | L_ALPHA; + private static final long H_ALPHANUM = H_DIGIT | H_ALPHA; + + // mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | + // "(" | ")" + private static final long L_MARK = lowMask("-_.!~*'()"); + private static final long H_MARK = highMask("-_.!~*'()"); + + // unreserved = alphanum | mark + private static final long L_UNRESERVED = L_ALPHANUM | L_MARK; + private static final long H_UNRESERVED = H_ALPHANUM | H_MARK; + + // pchar = unreserved | escaped | + // ":" | "@" | "&" | "=" | "+" | "$" | "," + private static final long L_PCHAR + = L_UNRESERVED | lowMask(":@&=+$,"); + private static final long H_PCHAR + = H_UNRESERVED | highMask(":@&=+$,"); + + // All valid path characters + private static final long L_PATH = L_PCHAR | lowMask(";/"); + private static final long H_PATH = H_PCHAR | highMask(";/"); + + private final static char[] hexDigits = { + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' + }; +} |