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annotate graal/com.oracle.jvmci.options/src/com/oracle/jvmci/options/OptionsLoader.java @ 21760:55058b8000ea

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updated javadoc to document that JVMCI services are disjoint from the standard service loading mechanism and tightened generic type constraint such that Services and @ServiceProcessor can only be used with classes implementing Service
author Doug Simon <doug.simon@oracle.com>
date Sat, 06 Jun 2015 09:23:37 +0200
parents 93f282187d90
children
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fe608a56e3f7 made HotSpotOptions processing faster by removing use of service loader in VM startup and only doing work for options specified on the command line
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
fe608a56e3f7 made HotSpotOptions processing faster by removing use of service loader in VM startup and only doing work for options specified on the command line
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.jvmci.options;
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24
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25 import java.util.*;
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26
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27 /**
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28 * Helper class used to load option descriptors. Only to be used in the slow-path.
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29 */
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30 public class OptionsLoader {
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31 public static final SortedMap<String, OptionDescriptor> options = new TreeMap<>();
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32
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33 /**
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34 * Initializes {@link #options} from {@link Options} services.
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35 */
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36 static {
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37 for (Options opts : ServiceLoader.load(Options.class, OptionsLoader.class.getClassLoader())) {
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38 for (OptionDescriptor desc : opts) {
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39 String name = desc.getName();
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40 OptionDescriptor existing = options.put(name, desc);
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41 assert existing == null : "Option named \"" + name + "\" has multiple definitions: " + existing.getLocation() + " and " + desc.getLocation();
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42 }
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43 }
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44 }
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45 }