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. 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 import java.lang.module.ModuleDescriptor; 25 import java.lang.module.ModuleFinder; 26 import java.lang.module.ModuleReader; 27 import java.lang.module.ModuleReference; 28 import java.net.URI; 29 import java.util.HashMap; 30 import java.util.HashSet; 31 import java.util.Map; 32 import java.util.Objects; 33 import java.util.Optional; 34 import java.util.Set; 35 36 37 /** 38 * This class consists exclusively of static utility methods that are useful 39 * for creating tests for modules. 40 */ 41 42 public final class ModuleUtils { 43 private ModuleUtils() { } 44 45 46 /** 47 * Returns a ModuleFinder that finds modules with the given module 48 * descriptors. 49 */ 50 static ModuleFinder finderOf(ModuleDescriptor... descriptors) { 51 52 // Create a ModuleReference for each module 53 Map<String, ModuleReference> namesToReference = new HashMap<>(); 54 55 for (ModuleDescriptor descriptor : descriptors) { 56 String name = descriptor.name(); 57 58 URI uri = URI.create("module:/" + name); 59 60 ModuleReference mref = new ModuleReference(descriptor, uri) { 61 @Override 62 public ModuleReader open() { 63 throw new UnsupportedOperationException(); 64 } 65 }; 66 67 namesToReference.put(name, mref); 68 } 69 70 return new ModuleFinder() { 71 @Override 72 public Optional<ModuleReference> find(String name) { 73 Objects.requireNonNull(name); 74 return Optional.ofNullable(namesToReference.get(name)); 75 } 76 @Override 77 public Set<ModuleReference> findAll() { 78 return new HashSet<>(namesToReference.values()); 79 } 80 }; 81 } 82 83 }