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annotate mx/FilterTypes.java @ 21886:b1234c06ea49

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removed timestamp from "unknown" Graal version string
author Doug Simon <doug.simon@oracle.com>
date Tue, 09 Jun 2015 22:31:05 +0200
parents b6aadfd3dfbe
children 543f150e7fa0
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1 /*
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2 * Copyright (c) 2015, 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
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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
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24 public class FilterTypes {
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25
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26 /**
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27 * Prints to {@link System#out} the values in {@code args[1 .. N]} that denote classes that are
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28 * {@link Class#isAssignableFrom(Class) assignable} to the type denoted in {@code args[0]}. The
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29 * values are separated by {@code "|"}.
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30 */
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31 public static void main(String... args) throws Exception {
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32 Class<?> jvmciServiceInterface = Class.forName(args[0]);
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33 boolean needSep = false;
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34 StringBuilder buf = new StringBuilder();
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35 for (int i = 1; i < args.length; ++i) {
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36 String serviceName = args[i];
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37 Class<?> service = lookupService(serviceName);
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38 if (service != null && jvmciServiceInterface.isAssignableFrom(service)) {
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39 if (buf.length() != 0) {
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40 buf.append('|');
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41 }
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42 buf.append(serviceName);
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43 needSep = true;
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44 }
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45 }
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46 System.out.print(buf);
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47 }
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48
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49 private static Class<?> lookupService(String serviceName) {
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50 try {
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51 // This can fail in the case of running against a JDK
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52 // with out of date JVMCI jars. In that case, just print
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53 // a warning sinc the expectation is that the jars will be
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54 // updated later on.
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55 return Class.forName(serviceName, false, FilterTypes.class.getClassLoader());
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56 } catch (ClassNotFoundException e) {
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57 // Must be stderr to avoid polluting the result being
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58 // written to stdout.
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59 System.err.println(e);
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60 return null;
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61 }
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62 }
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63 }