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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * 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).
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package com.sun.tools.javac.util;

import java.util.*;

import com.sun.tools.javac.main.Option;
import static com.sun.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.
 
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.
/** 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. /** 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. /** 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 reproducability
        values = new LinkedHashMap<>();
        context.put(optionsKey, this);
    }

    
Get the value for an undocumented option.
/**
     * Get the value for an undocumented option.
     */
    public String get(String name) {
        return values.get(name);
    }

    
Get the value for an option.
/**
     * 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".
/**
     * 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.
/**
     * 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.
/**
     * 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.
/**
     * 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.
/**
     * 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.
/** 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.
/**
     * 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.
/**
     * 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.
/**
     * 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();
    }
}