https://openjdk.java.net/ 
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 * Copyright (c) 2006, 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).
 *
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 * 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
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package com.sun.tools.javac.main;

import java.nio.file.Path;

import com.sun.tools.javac.util.JCDiagnostic;
import com.sun.tools.javac.util.Log;
import com.sun.tools.javac.util.Log.PrefixKind;


Helper object to be used by Option.process, providing access to the compilation environment. 
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.


/**
 * Helper object to be used by {@link Option#process}, providing access to
 * the compilation environment.
 *
 * <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></p>
 */

public abstract class OptionHelper {

    
Get the current value of an option.

Params:
  • option – the option
Returns:the value of the option
/**
     * Get the current value of an option.
     * @param option the option
     * @return the value of the option
     */
    public abstract String get(Option option);

    
Set the value of an option.

Params:
  • name – the primary name of the option
  • value – the value for the option
/**
     * Set the value of an option.
     * @param name the primary name of the option
     * @param value the value for the option
     */
    public abstract void put(String name, String value);

    
Remove any prior value for an option.

Params:
  • name – the primary name of the option
/**
     * Remove any prior value for an option.
     * @param name the primary name of the option
     */
    public abstract void remove(String name);

    
Handle a file manager option.

Params:
  • option – the option
  • value – the value for the option
Returns:true if the option was handled successfully, and false otherwise
/**
     * Handle a file manager option.
     * @param option the option
     * @param value the value for the option
     * @return true if the option was handled successfully, and false otherwise
     */
    public abstract boolean handleFileManagerOption(Option option, String value);

    
Get access to the Log for the compilation.

Returns:the log
/**
     * Get access to the Log for the compilation.
     * @return the log
     */
    public abstract Log getLog();

    
Get the name of the tool, such as "javac", to be used in info like -help.

Returns:the name of the tool
/**
     * Get the name of the tool, such as "javac", to be used in info like -help.
     * @return the name of the tool
     */
    public abstract String getOwnName();

    
Returns a new InvalidValueException, with a localized detail message.

Params:
  • key – the resource key for the message
  • args – the arguments, if any, for the resource string
Returns:the InvalidValueException
/**
     * Returns a new InvalidValueException, with a localized detail message.
     * @param key the resource key for the message
     * @param args the arguments, if any, for the resource string
     * @return the InvalidValueException
     */
    Option.InvalidValueException newInvalidValueException(String key, Object... args) {
        return new Option.InvalidValueException(getLog().localize(PrefixKind.JAVAC, key, args));
    }

    
Record a file to be compiled. 
/** Record a file to be compiled. */
    abstract void addFile(Path p);

    
Record the name of a class for annotation processing. 
/** Record the name of a class for annotation processing. */
    abstract void addClassName(String s);

    
An implementation of OptionHelper that mostly throws exceptions. 
/** An implementation of OptionHelper that mostly throws exceptions. */
    public static class GrumpyHelper extends OptionHelper {
        private final Log log;

        public GrumpyHelper(Log log) {
            this.log = log;
        }

        @Override
        public Log getLog() {
            return log;
        }

        @Override
        public String getOwnName() {
            throw new IllegalStateException();
        }

        @Override
        public String get(Option option) {
            throw new IllegalArgumentException();
        }

        @Override
        public void put(String name, String value) {
            throw new IllegalArgumentException();
        }

        @Override
        public void remove(String name) {
            throw new IllegalArgumentException();
        }

        @Override
        public boolean handleFileManagerOption(Option option, String value) {
            throw new IllegalArgumentException();
        }

        @Override
        public void addFile(Path p) {
            throw new IllegalArgumentException(p.toString());
        }

        @Override
        public void addClassName(String s) {
            throw new IllegalArgumentException(s);
        }
    }

}