| /* |
| * Copyright (c) 2009, 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.CoderResult; |
| import java.nio.charset.CodingErrorAction; |
| import java.util.Arrays; |
| |
| /** |
| * Utility class for zipfile name and comment decoding and encoding |
| */ |
| |
| final class ZipCoder { |
| |
| String toString(byte[] ba, int length) { |
| CharsetDecoder cd = decoder().reset(); |
| int len = (int)(length * cd.maxCharsPerByte()); |
| char[] ca = new char[len]; |
| if (len == 0) |
| return new String(ca); |
| ByteBuffer bb = ByteBuffer.wrap(ba, 0, 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()); |
| } |
| |
| String toString(byte[] ba) { |
| return toString(ba, ba.length); |
| } |
| |
| 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()); |
| } |
| |
| // assume invoked only if "this" is not utf8 |
| byte[] getBytesUTF8(String s) { |
| if (isutf8) |
| return getBytes(s); |
| if (utf8 == null) |
| utf8 = new ZipCoder(Charset.forName("UTF-8")); |
| return utf8.getBytes(s); |
| } |
| |
| |
| String toStringUTF8(byte[] ba, int len) { |
| if (isutf8) |
| return toString(ba, len); |
| if (utf8 == null) |
| utf8 = new ZipCoder(Charset.forName("UTF-8")); |
| return utf8.toString(ba, len); |
| } |
| |
| boolean isUTF8() { |
| return isutf8; |
| } |
| |
| private Charset cs; |
| private CharsetDecoder dec; |
| private CharsetEncoder enc; |
| private boolean isutf8; |
| private ZipCoder utf8; |
| |
| private ZipCoder(Charset cs) { |
| this.cs = cs; |
| this.isutf8 = cs.name().equals("UTF-8"); |
| } |
| |
| static ZipCoder get(Charset charset) { |
| return new ZipCoder(charset); |
| } |
| |
| private CharsetDecoder decoder() { |
| if (dec == null) { |
| dec = cs.newDecoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT); |
| } |
| return dec; |
| } |
| |
| private CharsetEncoder encoder() { |
| if (enc == null) { |
| enc = cs.newEncoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT); |
| } |
| return enc; |
| } |
| } |