| /* |
| * Copyright (c) 2000, 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. |
| * |
| */ |
| |
| // -- This file was mechanically generated: Do not edit! -- // |
| |
| package sun.nio.cs; |
| |
| import java.nio.charset.Charset; |
| import java.nio.charset.spi.CharsetProvider; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| import jdk.internal.vm.annotation.Stable; |
| import sun.security.action.GetPropertyAction; |
| |
| public class StandardCharsets extends CharsetProvider { |
| |
| _INCLUDE_ALIASES_TABLES_ |
| _INCLUDE_ALIASES_MAP_ |
| _INCLUDE_CLASSES_MAP_ |
| _INCLUDE_CACHE_MAP_ |
| |
| // Maps canonical names to class names |
| private @Stable Map<String,String> classMap; |
| |
| // Maps alias names to canonical names |
| private @Stable Map<String,String> aliasMap; |
| |
| // Maps canonical names to cached instances |
| private @Stable Map<String,Charset> cache; |
| |
| private static final String packagePrefix = "sun.nio.cs."; |
| |
| public StandardCharsets() { |
| } |
| |
| private String canonicalize(String csn) { |
| String acn = aliasMap().get(csn); |
| return (acn != null) ? acn : csn; |
| } |
| |
| private Map<String,String> aliasMap() { |
| Map<String,String> map = aliasMap; |
| if (map == null) { |
| aliasMap = map = new Aliases(); |
| } |
| return map; |
| } |
| |
| private Map<String,String> classMap() { |
| Map<String,String> map = classMap; |
| if (map == null) { |
| classMap = map = new Classes(); |
| } |
| return map; |
| } |
| |
| private Map<String,Charset> cache() { |
| Map<String,Charset> map = cache; |
| if (map == null) { |
| map = new Cache(); |
| map.put("utf-8", UTF_8.INSTANCE); |
| map.put("iso-8859-1", ISO_8859_1.INSTANCE); |
| map.put("us-ascii", US_ASCII.INSTANCE); |
| cache = map; |
| } |
| return map; |
| } |
| |
| // Private ASCII-only version, optimized for interpretation during startup |
| // |
| private static String toLower(String s) { |
| int n = s.length(); |
| boolean allLower = true; |
| for (int i = 0; i < n; i++) { |
| int c = s.charAt(i); |
| if (((c - 'A') | ('Z' - c)) >= 0) { |
| allLower = false; |
| break; |
| } |
| } |
| if (allLower) |
| return s; |
| StringBuilder sb = new StringBuilder(n); |
| for (int i = 0; i < n; i++) { |
| int c = s.charAt(i); |
| if (((c - 'A') | ('Z' - c)) >= 0) |
| sb.append((char)(c + 0x20)); |
| else |
| sb.append((char)c); |
| } |
| return sb.toString(); |
| } |
| |
| private Charset lookup(String charsetName) { |
| init(); |
| |
| // By checking these built-ins we can avoid initializing Aliases and |
| // Classes eagerly during bootstrap |
| String csn; |
| if (charsetName.equals("UTF-8")) { |
| return UTF_8.INSTANCE; |
| } else if (charsetName.equals("US-ASCII")) { |
| return US_ASCII.INSTANCE; |
| } else if (charsetName.equals("ISO-8859-1")) { |
| return ISO_8859_1.INSTANCE; |
| } else { |
| csn = canonicalize(toLower(charsetName)); |
| } |
| |
| // Check cache first |
| Charset cs = cache().get(csn); |
| if (cs != null) |
| return cs; |
| |
| // Do we even support this charset? |
| String cln = classMap().get(csn); |
| if (cln == null) |
| return null; |
| |
| // Instantiate the charset and cache it |
| try { |
| @SuppressWarnings("deprecation") |
| Object o = Class.forName(packagePrefix + cln, |
| true, |
| this.getClass().getClassLoader()).newInstance(); |
| return cache(csn, (Charset)o); |
| } catch (ClassNotFoundException | |
| IllegalAccessException | |
| InstantiationException x) { |
| return null; |
| } |
| } |
| |
| private Charset cache(String csn, Charset cs) { |
| cache().put(csn, cs); |
| return cs; |
| } |
| |
| public final Charset charsetForName(String charsetName) { |
| synchronized (this) { |
| return lookup(charsetName); |
| } |
| } |
| |
| public final Iterator<Charset> charsets() { |
| Set<String> charsetNames; |
| synchronized (this) { |
| init(); |
| // Ensure initialized in synchronized block |
| charsetNames = classMap().keySet(); |
| aliasMap(); |
| cache(); |
| } |
| return new Iterator<Charset>() { |
| |
| Iterator<String> i = charsetNames.iterator(); |
| |
| public boolean hasNext() { |
| return i.hasNext(); |
| } |
| |
| public Charset next() { |
| String csn = i.next(); |
| return lookup(csn); |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| }; |
| } |
| |
| private boolean initialized = false; |
| |
| /* provider the sun.nio.cs.map property fir sjis/ms932 mapping hack |
| */ |
| private void init() { |
| if (initialized) |
| return; |
| if (!jdk.internal.misc.VM.isBooted()) |
| return; |
| initialized = true; |
| |
| String map = GetPropertyAction.privilegedGetProperty("sun.nio.cs.map"); |
| if (map != null) { |
| Map<String,String> aliasMap = aliasMap(); |
| Map<String,String> classMap = classMap(); |
| String[] maps = map.split(","); |
| for (int i = 0; i < maps.length; i++) { |
| if (maps[i].equalsIgnoreCase("Windows-31J/Shift_JIS")) { |
| // if we dont have both sjis and ms932, do nothing |
| if (classMap.get("shift_jis") == null || |
| classMap.get("windows-31j") == null) { |
| break; |
| } |
| aliases_MS932 = new String[] { |
| "MS932", // JDK historical |
| "windows-932", |
| "csWindows31J", |
| "shift-jis", |
| "ms_kanji", |
| "x-sjis", |
| "csShiftJIS", |
| // This alias takes precedence over the actual |
| // Shift_JIS charset itself since aliases are always |
| // resolved first, before looking up canonical names. |
| "shift_jis" |
| }; |
| aliases_SJIS = new String[] { "sjis" }; |
| |
| for (String alias : aliases_MS932) { |
| aliasMap.put(toLower(alias), "windows-31j"); |
| } |
| cache().put("shift_jis", null); |
| break; |
| } |
| } |
| } |
| } |
| |
| } |