| /* |
| * Copyright (c) 2009, 2020, 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 java.util.zip; |
| |
| 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.CharacterCodingException; |
| import java.nio.charset.CodingErrorAction; |
| |
| import sun.nio.cs.UTF_8; |
| |
| /** |
| * Utility class for zipfile name and comment decoding and encoding |
| */ |
| |
| class ZipCoder { |
| |
| private static final jdk.internal.misc.JavaLangAccess JLA = |
| jdk.internal.misc.SharedSecrets.getJavaLangAccess(); |
| |
| static final class UTF8 extends ZipCoder { |
| |
| UTF8(Charset utf8) { |
| super(utf8); |
| } |
| |
| @Override |
| boolean isUTF8() { |
| return true; |
| } |
| |
| @Override |
| String toString(byte[] ba, int off, int length) { |
| return JLA.newStringUTF8NoRepl(ba, off, length); |
| } |
| |
| @Override |
| byte[] getBytes(String s) { |
| return JLA.getBytesUTF8NoRepl(s); |
| } |
| } |
| |
| // UTF_8.ArrayEn/Decoder is stateless, so make it singleton. |
| private static ZipCoder utf8 = new UTF8(UTF_8.INSTANCE); |
| |
| public static ZipCoder get(Charset charset) { |
| if (charset == UTF_8.INSTANCE) |
| return utf8; |
| return new ZipCoder(charset); |
| } |
| |
| String toString(byte[] ba, int off, int length) { |
| try { |
| return decoder().decode(ByteBuffer.wrap(ba, off, length)).toString(); |
| } catch (CharacterCodingException x) { |
| throw new IllegalArgumentException(x); |
| } |
| } |
| |
| String toString(byte[] ba, int length) { |
| return toString(ba, 0, length); |
| } |
| |
| String toString(byte[] ba) { |
| return toString(ba, 0, ba.length); |
| } |
| |
| byte[] getBytes(String s) { |
| try { |
| ByteBuffer bb = encoder().encode(CharBuffer.wrap(s)); |
| int pos = bb.position(); |
| int limit = bb.limit(); |
| if (bb.hasArray() && pos == 0 && limit == bb.capacity()) { |
| return bb.array(); |
| } |
| byte[] bytes = new byte[bb.limit() - bb.position()]; |
| bb.get(bytes); |
| return bytes; |
| } catch (CharacterCodingException x) { |
| throw new IllegalArgumentException(x); |
| } |
| } |
| |
| // assume invoked only if "this" is not utf8 |
| byte[] getBytesUTF8(String s) { |
| return utf8.getBytes(s); |
| } |
| |
| static String toStringUTF8(byte[] ba, int len) { |
| return utf8.toString(ba, 0, len); |
| } |
| |
| static String toStringUTF8(byte[] ba, int off, int len) { |
| return utf8.toString(ba, off, len); |
| } |
| |
| boolean isUTF8() { |
| return false; |
| } |
| |
| private Charset cs; |
| private CharsetDecoder dec; |
| private CharsetEncoder enc; |
| |
| private ZipCoder(Charset cs) { |
| this.cs = cs; |
| } |
| |
| protected CharsetDecoder decoder() { |
| if (dec == null) { |
| dec = cs.newDecoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT); |
| } |
| return dec; |
| } |
| |
| protected CharsetEncoder encoder() { |
| if (enc == null) { |
| enc = cs.newEncoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT); |
| } |
| return enc; |
| } |
| } |