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diff --git a/src/jdk/nashorn/internal/runtime/options/LoggingOption.java b/src/jdk/nashorn/internal/runtime/options/LoggingOption.java
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+/*
+ * Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.runtime.options;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.logging.Level;
+
+/**
+ * Class that collects logging options like --log=compiler:finest,fields,recompile:fine into
+ * a map form that can be used to instantiate loggers in the Global object on demand
+ */
+public class LoggingOption extends KeyValueOption {
+
+ /**
+ * Logging info. Basically a logger name maps to this,
+ * which is a tuple of log level and the "is quiet" flag,
+ * which is a special log level used to collect RuntimeEvents
+ * only, but not output anything
+ */
+ public static class LoggerInfo {
+ private final Level level;
+ private final boolean isQuiet;
+
+ LoggerInfo(final Level level, final boolean isQuiet) {
+ this.level = level;
+ this.isQuiet = isQuiet;
+ }
+
+ /**
+ * Get the log level
+ * @return log level
+ */
+ public Level getLevel() {
+ return level;
+ }
+
+ /**
+ * Get the quiet flag
+ * @return true if quiet flag is set
+ */
+ public boolean isQuiet() {
+ return isQuiet;
+ }
+ }
+
+ private final Map<String, LoggerInfo> loggers = new HashMap<>();
+
+ LoggingOption(final String value) {
+ super(value);
+ initialize(getValues());
+ }
+
+ /**
+ * Return the logger info collected from this command line option
+ *
+ * @return map of logger name to logger info
+ */
+ public Map<String, LoggerInfo> getLoggers() {
+ return Collections.unmodifiableMap(loggers);
+ }
+
+ /**
+ * Initialization function that is called to instantiate the logging system. It takes
+ * logger names (keys) and logging labels respectively
+ *
+ * @param map a map where the key is a logger name and the value a logging level
+ * @throws IllegalArgumentException if level or names cannot be parsed
+ */
+ private void initialize(final Map<String, String> logMap) throws IllegalArgumentException {
+ try {
+ for (final Entry<String, String> entry : logMap.entrySet()) {
+ Level level;
+ final String name = lastPart(entry.getKey());
+ final String levelString = entry.getValue().toUpperCase(Locale.ENGLISH);
+ final boolean isQuiet;
+
+ if ("".equals(levelString)) {
+ level = Level.INFO;
+ isQuiet = false;
+ } else if ("QUIET".equals(levelString)) {
+ level = Level.INFO;
+ isQuiet = true;
+ } else {
+ level = Level.parse(levelString);
+ isQuiet = false;
+ }
+
+ loggers.put(name, new LoggerInfo(level, isQuiet));
+ }
+ } catch (final IllegalArgumentException | SecurityException e) {
+ throw e;
+ }
+ }
+
+
+
+ private static String lastPart(final String packageName) {
+ final String[] parts = packageName.split("\\.");
+ if (parts.length == 0) {
+ return packageName;
+ }
+ return parts[parts.length - 1];
+ }
+
+
+}