1/* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package com.sun.tools.javac.platform; 27 28import com.sun.tools.javac.main.Arguments; 29import com.sun.tools.javac.platform.PlatformProvider.PlatformNotSupported; 30import java.util.Optional; 31import java.util.ServiceLoader; 32import java.util.stream.StreamSupport; 33 34/** Internal utilities to work with PlatformDescriptions. 35 * 36 * <p><b>This is NOT part of any supported API. 37 * If you write code that depends on this, you do so at your own risk. 38 * This code and its internal interfaces are subject to change or 39 * deletion without notice.</b> 40 */ 41public class PlatformUtils { 42 43 public static PlatformDescription lookupPlatformDescription(String platformString) { 44 int separator = platformString.indexOf(":"); 45 String platformProviderName = 46 separator != (-1) ? platformString.substring(0, separator) : platformString; 47 String platformOptions = 48 separator != (-1) ? platformString.substring(separator + 1) : ""; 49 Iterable<PlatformProvider> providers = 50 ServiceLoader.load(PlatformProvider.class, Arguments.class.getClassLoader()); 51 52 return StreamSupport.stream(providers.spliterator(), false) 53 .filter(provider -> StreamSupport.stream(provider.getSupportedPlatformNames() 54 .spliterator(), 55 false) 56 .anyMatch(platformProviderName::equals)) 57 .findFirst() 58 .flatMap(provider -> { 59 try { 60 return Optional.of(provider.getPlatform(platformProviderName, platformOptions)); 61 } catch (PlatformNotSupported pns) { 62 return Optional.empty(); 63 } 64 }) 65 .orElse(null); 66 } 67 68} 69