1 /* 2 * Copyright (c) 2017, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 26 package jdk.tools.jaotc.collect; 27 28 import jdk.tools.jaotc.LoadedClass; 29 30 import java.util.ArrayList; 31 import java.util.List; 32 import java.util.function.BiConsumer; 33 34 public final class ClassSearch { 35 private final List<SourceProvider> providers = new ArrayList<>(); 36 37 public void addProvider(SourceProvider provider) { 38 providers.add(provider); 39 } 40 41 public List<LoadedClass> search(List<SearchFor> search, SearchPath searchPath) { 42 return search(search, searchPath, (s, t) -> { 43 throw new InternalError(s + " : " + t, t); 44 }); 45 } 46 47 public List<LoadedClass> search(List<SearchFor> search, SearchPath searchPath, BiConsumer<String, Throwable> classLoadingErrorsHandler) { 48 List<LoadedClass> loaded = new ArrayList<>(); 49 50 List<ClassSource> sources = new ArrayList<>(); 51 52 for (SearchFor entry : search) { 53 sources.add(findSource(entry, searchPath, classLoadingErrorsHandler)); 54 } 55 56 for (ClassSource source : sources) { 57 if (source != null) { 58 source.eachClass((name, loader) -> { 59 LoadedClass x = loadClass(name, loader, classLoadingErrorsHandler); 60 if (x != null) { 61 loaded.add(x); 62 } 63 }); 64 } 65 } 66 67 return loaded; 68 } 69 70 private static LoadedClass loadClass(String name, ClassLoader loader, BiConsumer<String, Throwable> classLoadingErrorsHandler) { 71 try { 72 Class<?> clzz = loader.loadClass(name); 73 return new LoadedClass(name, clzz); 74 } catch (Throwable e) { 75 classLoadingErrorsHandler.accept(name, e); 76 return null; 77 } 78 } 79 80 private ClassSource findSource(SearchFor searchFor, SearchPath searchPath, BiConsumer<String, Throwable> classLoadingErrorsHandler) { 81 ClassSource found = null; 82 83 for (SourceProvider provider : providers) { 84 if (!searchFor.isUnknown() && !provider.supports(searchFor.getType())) { 85 continue; 86 } 87 ClassSource source = null; 88 try { 89 source = provider.findSource(searchFor.getName(), searchPath); 90 } catch (Throwable e) { 91 classLoadingErrorsHandler.accept(searchFor.getName(), e); 92 } 93 if (source != null) { 94 if (found != null) { 95 throw new InternalError("Multiple possible sources: " + source + " and: " + found); 96 } 97 found = source; 98 } 99 } 100 101 if (found == null) { 102 classLoadingErrorsHandler.accept(searchFor.getName(), new InternalError("Failed to find " + searchFor.getType() + " file: " + searchFor.getName())); 103 } 104 return found; 105 } 106 107 public static List<SearchFor> makeList(String type, String argument) { 108 List<SearchFor> list = new ArrayList<>(); 109 String[] elements = argument.split(":"); 110 for (String element : elements) { 111 list.add(new SearchFor(element, type)); 112 } 113 return list; 114 } 115 }