content: /*
   * Copyright (c) 2001, 2019, 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 openjdk.tools.javac.util;
  
  import java.util.*;
  
  import openjdk.tools.javac.main.Option;
  import static openjdk.tools.javac.main.Option.*;
  
  /** A table of all command-line options.
   *  If an option has an argument, the option name is mapped to the argument.
   *  If a set option has no argument, it is mapped to itself.
   *
   *  <p><b>This is NOT part of any supported API.
   *  If you write code that depends on this, you do so at your own risk.
   *  This code and its internal interfaces are subject to change or
   *  deletion without notice.</b>
   */
  public class Options {
      private static final long serialVersionUID = 0;
  
      /** The context key for the options. */
      public static final Context.Key<Options> optionsKey = new Context.Key<>();
  
      private LinkedHashMap<String,String> values;
  
      /** Get the Options instance for this context. */
      public static Options instance(Context context) {
          Options instance = context.get(optionsKey);
          if (instance == null)
              instance = new Options(context);
          return instance;
      }
  
      protected Options(Context context) {
  // DEBUGGING -- Use LinkedHashMap for reproducibility
          values = new LinkedHashMap<>();
          context.put(optionsKey, this);
      }
  
      /**
       * Get the value for an undocumented option.
       */
      public String get(String name) {
          return values.get(name);
      }
  
      /**
       * Get the value for an option.
       */
      public String get(Option option) {
          return values.get(option.primaryName);
      }
  
      /**
       * Get the boolean value for an option, patterned after Boolean.getBoolean,
       * essentially will return true, iff the value exists and is set to "true".
       */
      public boolean getBoolean(String name) {
          return getBoolean(name, false);
      }
  
      /**
       * Get the boolean with a default value if the option is not set.
       */
      public boolean getBoolean(String name, boolean defaultValue) {
          String value = get(name);
          return (value == null) ? defaultValue : Boolean.parseBoolean(value);
      }
  
      /**
       * Check if the value for an undocumented option has been set.
       */
      public boolean isSet(String name) {
          return (values.get(name) != null);
      }
  
      /**
       * Check if the value for an option has been set.
       */
      public boolean isSet(Option option) {
          return (values.get(option.primaryName) != null);
      }
  
      /**
       * Check if the value for a choice option has been set to a specific value.
       */
      public boolean isSet(Option option, String value) {
          return (values.get(option.primaryName + value) != null);
      }
  
      /** Check if the value for a lint option has been explicitly set, either with -Xlint:opt
       *  or if all lint options have enabled and this one not disabled with -Xlint:-opt.
       */
      public boolean isLintSet(String s) {
          // return true if either the specific option is enabled, or
          // they are all enabled without the specific one being
          // disabled
          return
              isSet(XLINT_CUSTOM, s) ||
              (isSet(XLINT) || isSet(XLINT_CUSTOM, "all")) && isUnset(XLINT_CUSTOM, "-" + s);
      }
  
      /**
       * Check if the value for an undocumented option has not been set.
       */
      public boolean isUnset(String name) {
          return (values.get(name) == null);
      }
  
      /**
       * Check if the value for an option has not been set.
       */
      public boolean isUnset(Option option) {
          return (values.get(option.primaryName) == null);
      }
  
      /**
       * Check if the value for a choice option has not been set to a specific value.
       */
      public boolean isUnset(Option option, String value) {
          return (values.get(option.primaryName + value) == null);
      }
  
      public void put(String name, String value) {
          values.put(name, value);
      }
  
      public void put(Option option, String value) {
          values.put(option.primaryName, value);
      }
  
      public void putAll(Options options) {
          values.putAll(options.values);
      }
  
      public void remove(String name) {
          values.remove(name);
      }
  
      public Set<String> keySet() {
          return values.keySet();
      }
  
      public int size() {
          return values.size();
      }
  
      // light-weight notification mechanism
  
      private List<Runnable> listeners = List.nil();
  
      public void addListener(Runnable listener) {
          listeners = listeners.prepend(listener);
      }
  
      public void notifyListeners() {
          for (Runnable r: listeners)
              r.run();
      }
  
      public void clear() {
          values.clear();
          listeners = List.nil();
      }
  }
  