001/*
002 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package jdk.internal.jvmci.options;
024
025import java.util.*;
026
027/**
028 * Helper class used to load option descriptors. Only to be used in the slow-path.
029 */
030public class OptionsLoader {
031    public static final SortedMap<String, OptionDescriptor> options = new TreeMap<>();
032
033    /**
034     * Initializes {@link #options} from {@link Options} services.
035     */
036    static {
037        for (Options opts : ServiceLoader.load(Options.class, OptionsLoader.class.getClassLoader())) {
038            for (OptionDescriptor desc : opts) {
039                String name = desc.getName();
040                OptionDescriptor existing = options.put(name, desc);
041                assert existing == null : "Option named \"" + name + "\" has multiple definitions: " + existing.getLocation() + " and " + desc.getLocation();
042            }
043        }
044    }
045}