| /* |
| * Copyright (c) 2009, 2017, 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 jdk.nio.zipfs; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetDecoder; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CoderResult; |
| import java.nio.charset.CodingErrorAction; |
| import java.util.Arrays; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| import static java.nio.charset.StandardCharsets.ISO_8859_1; |
| |
| /** |
| * Utility class for zipfile name and comment decoding and encoding |
| * |
| * @author Xueming Shen |
| */ |
| |
| class ZipCoder { |
| |
| static class UTF8 extends ZipCoder { |
| UTF8() { |
| super(UTF_8); |
| } |
| |
| @Override |
| byte[] getBytes(String s) { // fast pass for ascii |
| for (int i = 0; i < s.length(); i++) { |
| if (s.charAt(i) > 0x7f) return super.getBytes(s); |
| } |
| return s.getBytes(ISO_8859_1); |
| } |
| |
| @Override |
| String toString(byte[] ba) { |
| for (byte b : ba) { |
| if (b < 0) return super.toString(ba); |
| } |
| return new String(ba, ISO_8859_1); |
| } |
| } |
| |
| private static final ZipCoder utf8 = new UTF8(); |
| |
| public static ZipCoder get(String csn) { |
| Charset cs = Charset.forName(csn); |
| if (cs.name().equals("UTF-8")) { |
| return utf8; |
| } |
| return new ZipCoder(cs); |
| } |
| |
| String toString(byte[] ba) { |
| CharsetDecoder cd = decoder().reset(); |
| int clen = (int)(ba.length * cd.maxCharsPerByte()); |
| char[] ca = new char[clen]; |
| if (clen == 0) |
| return new String(ca); |
| ByteBuffer bb = ByteBuffer.wrap(ba, 0, ba.length); |
| CharBuffer cb = CharBuffer.wrap(ca); |
| CoderResult cr = cd.decode(bb, cb, true); |
| if (!cr.isUnderflow()) |
| throw new IllegalArgumentException(cr.toString()); |
| cr = cd.flush(cb); |
| if (!cr.isUnderflow()) |
| throw new IllegalArgumentException(cr.toString()); |
| return new String(ca, 0, cb.position()); |
| } |
| |
| byte[] getBytes(String s) { |
| CharsetEncoder ce = encoder().reset(); |
| char[] ca = s.toCharArray(); |
| int len = (int)(ca.length * ce.maxBytesPerChar()); |
| byte[] ba = new byte[len]; |
| if (len == 0) |
| return ba; |
| ByteBuffer bb = ByteBuffer.wrap(ba); |
| CharBuffer cb = CharBuffer.wrap(ca); |
| CoderResult cr = ce.encode(cb, bb, true); |
| if (!cr.isUnderflow()) |
| throw new IllegalArgumentException(cr.toString()); |
| cr = ce.flush(bb); |
| if (!cr.isUnderflow()) |
| throw new IllegalArgumentException(cr.toString()); |
| if (bb.position() == ba.length) // defensive copy? |
| return ba; |
| else |
| return Arrays.copyOf(ba, bb.position()); |
| } |
| |
| boolean isUTF8() { |
| return cs == UTF_8; |
| } |
| |
| private Charset cs; |
| |
| private ZipCoder(Charset cs) { |
| this.cs = cs; |
| } |
| |
| private final ThreadLocal<CharsetDecoder> decTL = new ThreadLocal<>(); |
| private final ThreadLocal<CharsetEncoder> encTL = new ThreadLocal<>(); |
| |
| private CharsetDecoder decoder() { |
| CharsetDecoder dec = decTL.get(); |
| if (dec == null) { |
| dec = cs.newDecoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT); |
| decTL.set(dec); |
| } |
| return dec; |
| } |
| |
| private CharsetEncoder encoder() { |
| CharsetEncoder enc = encTL.get(); |
| if (enc == null) { |
| enc = cs.newEncoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT); |
| encTL.set(enc); |
| } |
| return enc; |
| } |
| } |