ModuleElement.java revision 3294:9adfb22ff08f
1/* 2 * Copyright (c) 2005, 2016, 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 javax.lang.model.element; 27 28import java.util.List; 29 30/** 31 * Represents a module program element. Provides access to information 32 * about the module and its members. 33 * 34 * @see javax.lang.model.util.Elements#getModuleOf 35 * @since 9 36 */ // TODO: add @jls to module section 37public interface ModuleElement extends Element, QualifiedNameable { 38 39 /** 40 * Returns the fully qualified name of this module. 41 * 42 * @return the qualified name of this module, or an 43 * empty name if this is an unnamed module 44 */ 45 @Override 46 Name getQualifiedName(); 47 48 /** 49 * Returns the simple name of this module. For an unnamed 50 * module, an empty name is returned. 51 * 52 * @return the simple name of this module or an empty name if 53 * this is an unnamed module 54 */ 55 @Override 56 Name getSimpleName(); 57 58 /** 59 * Returns the packages within this module. 60 * @return the packages within this module 61 */ 62 @Override 63 List<? extends Element> getEnclosedElements(); 64 65 /** 66 * Returns {@code true} if this is an unnamed module and {@code 67 * false} otherwise. 68 * 69 * @return {@code true} if this is an unnamed module and {@code 70 * false} otherwise 71 */ // TODO: add @jls to unnamed module section 72 boolean isUnnamed(); 73 74 /** 75 * Returns {@code null} since a module is not enclosed by another 76 * element. 77 * 78 * @return {@code null} 79 */ 80 @Override 81 Element getEnclosingElement(); 82 83 /** 84 * Returns the directives contained in the declaration of this module. 85 * @return the directives in the declaration of this module 86 */ 87 List<? extends Directive> getDirectives(); 88 89 /** 90 * The {@code kind} of a directive. 91 * 92 * <p>Note that it is possible additional directive kinds will be added 93 * to accommodate new, currently unknown, language structures added to 94 * future versions of the Java™ programming language. 95 * 96 * @since 9 97 */ 98 enum DirectiveKind { 99 /** A "requires [public] module-name" directive. */ 100 REQUIRES, 101 /** An "exports package-name [to module-name-list]" directive. */ 102 EXPORTS, 103 /** A "uses service-name" directive. */ 104 USES, 105 /** A "provides service-name with implementation-name" directive. */ 106 PROVIDES 107 }; 108 109 /** 110 * Represents a "module statement" within the declaration of this module. 111 * 112 * @since 9 113 * 114 */ // TODO: add jls to Module Statement 115 interface Directive { 116 /** 117 * Returns the {@code kind} of this directive. 118 * 119 * @return the kind of this directive 120 */ 121 DirectiveKind getKind(); 122 } 123 124 /** 125 * A dependency of a module. 126 * @since 9 127 */ 128 interface RequiresDirective extends Directive { 129 /** 130 * Returns whether or not this is a public dependency. 131 * @return whether or not this is a public dependency 132 */ 133 boolean isPublic(); 134 135 /** 136 * Returns the module that is required 137 * @return the module that is required 138 */ 139 ModuleElement getDependency(); 140 } 141 142 /** 143 * An exported package of a module. 144 * @since 9 145 */ 146 interface ExportsDirective extends Directive { 147 /** 148 * Returns the package being exported. 149 * @return the package being exported 150 */ 151 PackageElement getPackage(); 152 153 /** 154 * Returns the specific modules to which the package is being exported, 155 * or null, if the package is exported to all modules which 156 * have readability to this module. 157 * @return the specific modules to which the package is being exported 158 */ 159 List<? extends ModuleElement> getTargetModules(); 160 } 161 162 /** 163 * An implementation of a service provided by a module. 164 * @since 9 165 */ 166 interface ProvidesDirective extends Directive { 167 /** 168 * Returns the service being provided. 169 * @return the service being provided 170 */ 171 TypeElement getService(); 172 173 /** 174 * Returns the implementation of the service being provided. 175 * @return the implementation of the service being provided 176 */ 177 TypeElement getImplementation(); 178 } 179 180 /** 181 * A reference to a service used by a module. 182 * @since 9 183 */ 184 interface UsesDirective extends Directive { 185 /** 186 * Returns the service that is used. 187 * @return the service that is used 188 */ 189 TypeElement getService(); 190 } 191} 192