jdk/src/java.base/share/classes/sun/util/resources/BreakIteratorResourceBundle.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/sun/util/resources/BreakIteratorResourceBundle.java Tue Oct 25 15:43:19 2016 +0900
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2016, 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.util.resources;
+
+import java.io.InputStream;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.ResourceBundle;
+import java.util.Set;
+
+/**
+ * BreakIteratorResourceBundle is an abstract class for loading BreakIterator
+ * data (rules or dictionary) from each module. An implementation class must
+ * implement getBreakIteratorInfo() that returns an instance of the
+ * corresponding BreakIteratorInfo (basename). The data name is taken from the
+ * BreakIteratorInfo instance.
+ *
+ * <p>For example, if the given key is "WordDictionary" and Locale is "th", the
+ * data name is taken from a BreakIteratorInfo_th and the key's value is
+ * "thai_dict". Its data thai_dict is loaded from the Module of the
+ * implementation class of this class.
+ */
+
+public abstract class BreakIteratorResourceBundle extends ResourceBundle {
+ // If any keys that are not for data names are added to BreakIteratorInfo*,
+ // those keys must be added to NON_DATA_KEYS.
+ private static final Set<String> NON_DATA_KEYS = Set.of("BreakIteratorClasses");
+
+ private volatile Set<String> keys;
+
+ /**
+ * Returns an instance of the corresponding {@code BreakIteratorInfo} (basename).
+ * The instance shouldn't have its parent.
+ */
+ protected abstract ResourceBundle getBreakIteratorInfo();
+
+ @Override
+ protected Object handleGetObject(String key) {
+ if (NON_DATA_KEYS.contains(key)) {
+ return null;
+ }
+ ResourceBundle info = getBreakIteratorInfo();
+ if (!info.containsKey(key)) {
+ return null;
+ }
+ String path = getClass().getPackage().getName().replace('.', '/')
+ + '/' + info.getString(key);
+ byte[] data;
+ try (InputStream is = getResourceAsStream(path)) {
+ data = is.readAllBytes();
+ } catch (Exception e) {
+ throw new InternalError("Can't load " + path, e);
+ }
+ return data;
+ }
+
+ private InputStream getResourceAsStream(String path) throws Exception {
+ PrivilegedExceptionAction<InputStream> pa;
+ pa = () -> getClass().getModule().getResourceAsStream(path);
+ InputStream is;
+ try {
+ is = AccessController.doPrivileged(pa);
+ } catch (PrivilegedActionException e) {
+ throw e.getException();
+ }
+ return is;
+ }
+
+ @Override
+ public Enumeration<String> getKeys() {
+ return Collections.enumeration(keySet());
+ }
+
+ @Override
+ protected Set<String> handleKeySet() {
+ if (keys == null) {
+ ResourceBundle info = getBreakIteratorInfo();
+ Set<String> k = info.keySet();
+ k.removeAll(NON_DATA_KEYS);
+ synchronized (this) {
+ if (keys == null) {
+ keys = k;
+ }
+ }
+ }
+ return keys;
+ }
+}