--- a/jdk/src/java.base/share/classes/sun/nio/cs/AbstractCharsetProvider.java Fri Jun 12 08:31:01 2015 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,206 +0,0 @@
-/*
- * Copyright (c) 2000, 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.cs;
-
-import java.lang.ref.SoftReference;
-import java.nio.charset.Charset;
-import java.nio.charset.spi.CharsetProvider;
-import java.util.ArrayList;
-import java.util.TreeMap;
-import java.util.Iterator;
-import java.util.Locale;
-import java.util.Map;
-import sun.misc.ASCIICaseInsensitiveComparator;
-
-
-/**
- * Abstract base class for charset providers.
- *
- * @author Mark Reinhold
- */
-
-public class AbstractCharsetProvider
- extends CharsetProvider
-{
-
- /* Maps canonical names to class names
- */
- private Map<String,String> classMap
- = new TreeMap<>(ASCIICaseInsensitiveComparator.CASE_INSENSITIVE_ORDER);
-
- /* Maps alias names to canonical names
- */
- private Map<String,String> aliasMap
- = new TreeMap<>(ASCIICaseInsensitiveComparator.CASE_INSENSITIVE_ORDER);
-
- /* Maps canonical names to alias-name arrays
- */
- private Map<String,String[]> aliasNameMap
- = new TreeMap<>(ASCIICaseInsensitiveComparator.CASE_INSENSITIVE_ORDER);
-
- /* Maps canonical names to soft references that hold cached instances
- */
- private Map<String,SoftReference<Charset>> cache
- = new TreeMap<>(ASCIICaseInsensitiveComparator.CASE_INSENSITIVE_ORDER);
-
- private String packagePrefix;
-
- protected AbstractCharsetProvider() {
- packagePrefix = "sun.nio.cs";
- }
-
- protected AbstractCharsetProvider(String pkgPrefixName) {
- packagePrefix = pkgPrefixName;
- }
-
- /* Add an entry to the given map, but only if no mapping yet exists
- * for the given name.
- */
- private static <K,V> void put(Map<K,V> m, K name, V value) {
- if (!m.containsKey(name))
- m.put(name, value);
- }
-
- private static <K,V> void remove(Map<K,V> m, K name) {
- V x = m.remove(name);
- assert (x != null);
- }
-
- /* Declare support for the given charset
- */
- protected void charset(String name, String className, String[] aliases) {
- synchronized (this) {
- put(classMap, name, className);
- for (int i = 0; i < aliases.length; i++)
- put(aliasMap, aliases[i], name);
- put(aliasNameMap, name, aliases);
- cache.clear();
- }
- }
-
- protected void deleteCharset(String name, String[] aliases) {
- synchronized (this) {
- remove(classMap, name);
- for (int i = 0; i < aliases.length; i++)
- remove(aliasMap, aliases[i]);
- remove(aliasNameMap, name);
- cache.clear();
- }
- }
-
- protected boolean hasCharset(String name) {
- synchronized (this) {
- return classMap.containsKey(name);
- }
- }
-
- /* Late initialization hook, needed by some providers
- */
- protected void init() { }
-
- private String canonicalize(String charsetName) {
- String acn = aliasMap.get(charsetName);
- return (acn != null) ? acn : charsetName;
- }
-
- private Charset lookup(String csn) {
-
- // Check cache first
- SoftReference<Charset> sr = cache.get(csn);
- if (sr != null) {
- Charset cs = sr.get();
- 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 {
-
- Class<?> c = Class.forName(packagePrefix + "." + cln,
- true,
- this.getClass().getClassLoader());
-
- Charset cs = (Charset)c.newInstance();
- cache.put(csn, new SoftReference<Charset>(cs));
- return cs;
- } catch (ClassNotFoundException x) {
- return null;
- } catch (IllegalAccessException x) {
- return null;
- } catch (InstantiationException x) {
- return null;
- }
- }
-
- public final Charset charsetForName(String charsetName) {
- synchronized (this) {
- init();
- return lookup(canonicalize(charsetName));
- }
- }
-
- public final Iterator<Charset> charsets() {
-
- final ArrayList<String> ks;
- synchronized (this) {
- init();
- ks = new ArrayList<>(classMap.keySet());
- }
-
- return new Iterator<Charset>() {
- Iterator<String> i = ks.iterator();
-
- public boolean hasNext() {
- return i.hasNext();
- }
-
- public Charset next() {
- String csn = i.next();
- synchronized (AbstractCharsetProvider.this) {
- return lookup(csn);
- }
- }
-
- public void remove() {
- throw new UnsupportedOperationException();
- }
- };
- }
-
- public final String[] aliases(String charsetName) {
- synchronized (this) {
- init();
- return aliasNameMap.get(charsetName);
- }
- }
-
-}