1 /* 2 * Copyright (c) 2002, 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. 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 26 package com.sun.tools.javac.code; 27 28 import java.util.*; 29 30 import javax.lang.model.SourceVersion; 31 import static javax.lang.model.SourceVersion.*; 32 33 import com.sun.tools.javac.jvm.Target; 34 import com.sun.tools.javac.resources.CompilerProperties.Errors; 35 import com.sun.tools.javac.resources.CompilerProperties.Fragments; 36 import com.sun.tools.javac.util.*; 37 import com.sun.tools.javac.util.JCDiagnostic.Error; 38 import com.sun.tools.javac.util.JCDiagnostic.Fragment; 39 40 import static com.sun.tools.javac.main.Option.*; 41 42 /** The source language version accepted. 43 * 44 * <p><b>This is NOT part of any supported API. 45 * If you write code that depends on this, you do so at your own risk. 46 * This code and its internal interfaces are subject to change or 47 * deletion without notice.</b> 48 */ 49 public enum Source { 50 /** 1.0 had no inner classes, and so could not pass the JCK. */ 51 // public static final Source JDK1_0 = new Source("1.0"); 52 53 /** 1.1 did not have strictfp, and so could not pass the JCK. */ 54 // public static final Source JDK1_1 = new Source("1.1"); 55 56 /** 1.2 introduced strictfp. */ 57 JDK1_2("1.2"), 58 59 /** 1.3 is the same language as 1.2. */ 60 JDK1_3("1.3"), 61 62 /** 1.4 introduced assert. */ 63 JDK1_4("1.4"), 64 65 /** 1.5 introduced generics, attributes, foreach, boxing, static import, 66 * covariant return, enums, varargs, et al. */ 67 JDK5("5"), 68 69 /** 1.6 reports encoding problems as errors instead of warnings. */ 70 JDK6("6"), 71 72 /** 1.7 introduced try-with-resources, multi-catch, string switch, etc. */ 73 JDK7("7"), 74 75 /** 1.8 lambda expressions and default methods. */ 76 JDK8("8"), 77 78 /** 1.9 modularity. */ 79 JDK9("9"), 80 81 /** 1.10 covers the to be determined language features that will be added in JDK 10. */ 82 JDK10("10"), 83 84 /** 1.11 covers the to be determined language features that will be added in JDK 11. */ 85 JDK11("11"); 86 87 private static final Context.Key<Source> sourceKey = new Context.Key<>(); 88 89 public static Source instance(Context context) { 90 Source instance = context.get(sourceKey); 91 if (instance == null) { 92 Options options = Options.instance(context); 93 String sourceString = options.get(SOURCE); 94 if (sourceString != null) instance = lookup(sourceString); 95 if (instance == null) instance = DEFAULT; 96 context.put(sourceKey, instance); 97 } 98 return instance; 99 } 100 101 public final String name; 102 103 private static final Map<String,Source> tab = new HashMap<>(); 104 static { 105 for (Source s : values()) { 106 tab.put(s.name, s); 107 } 108 tab.put("1.5", JDK5); // Make 5 an alias for 1.5 109 tab.put("1.6", JDK6); // Make 6 an alias for 1.6 110 tab.put("1.7", JDK7); // Make 7 an alias for 1.7 111 tab.put("1.8", JDK8); // Make 8 an alias for 1.8 112 tab.put("1.9", JDK9); // Make 9 an alias for 1.9 113 tab.put("1.10", JDK10); // Make 10 an alias for 1.10 114 // Decline to make 1.11 an alias for 11. 115 } 116 117 private Source(String name) { 118 this.name = name; 119 } 120 121 public static final Source MIN = Source.JDK6; 122 123 private static final Source MAX = values()[values().length - 1]; 124 125 public static final Source DEFAULT = MAX; 126 127 public static Source lookup(String name) { 128 return tab.get(name); 129 } 130 131 public Target requiredTarget() { 132 if (this.compareTo(JDK11) >= 0) return Target.JDK1_11; 133 if (this.compareTo(JDK10) >= 0) return Target.JDK1_10; 134 if (this.compareTo(JDK9) >= 0) return Target.JDK1_9; 135 if (this.compareTo(JDK8) >= 0) return Target.JDK1_8; 136 if (this.compareTo(JDK7) >= 0) return Target.JDK1_7; 137 if (this.compareTo(JDK6) >= 0) return Target.JDK1_6; 138 if (this.compareTo(JDK5) >= 0) return Target.JDK1_5; 139 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4; 140 return Target.JDK1_1; 141 } 142 143 /** 144 * Models a feature of the Java programming language. Each feature can be associated with a 145 * minimum source level, a maximum source level and a diagnostic fragment describing the feature, 146 * which is used to generate error messages of the kind {@code feature XYZ not supported in source N}. 147 */ 148 public enum Feature { 149 150 DIAMOND(JDK7, Fragments.FeatureDiamond, DiagKind.NORMAL), 151 MULTICATCH(JDK7, Fragments.FeatureMulticatch, DiagKind.PLURAL), 152 IMPROVED_RETHROW_ANALYSIS(JDK7), 153 IMPROVED_CATCH_ANALYSIS(JDK7), 154 MODULES(JDK9, Fragments.FeatureModules, DiagKind.PLURAL), 155 TRY_WITH_RESOURCES(JDK7, Fragments.FeatureTryWithResources, DiagKind.NORMAL), 156 EFFECTIVELY_FINAL_VARIABLES_IN_TRY_WITH_RESOURCES(JDK9, Fragments.FeatureVarInTryWithResources, DiagKind.PLURAL), 157 BINARY_LITERALS(JDK7, Fragments.FeatureBinaryLit, DiagKind.PLURAL), 158 UNDERSCORES_IN_LITERALS(JDK7, Fragments.FeatureUnderscoreLit, DiagKind.PLURAL), 159 STRINGS_IN_SWITCH(JDK7, Fragments.FeatureStringSwitch, DiagKind.PLURAL), 160 DEPRECATION_ON_IMPORT(MIN, JDK9), 161 SIMPLIFIED_VARARGS(JDK7), 162 OBJECT_TO_PRIMITIVE_CAST(JDK7), 163 ENFORCE_THIS_DOT_INIT(JDK7), 164 POLY(JDK8), 165 LAMBDA(JDK8, Fragments.FeatureLambda, DiagKind.PLURAL), 166 METHOD_REFERENCES(JDK8, Fragments.FeatureMethodReferences, DiagKind.PLURAL), 167 DEFAULT_METHODS(JDK8, Fragments.FeatureDefaultMethods, DiagKind.PLURAL), 168 STATIC_INTERFACE_METHODS(JDK8, Fragments.FeatureStaticIntfMethods, DiagKind.PLURAL), 169 STATIC_INTERFACE_METHODS_INVOKE(JDK8, Fragments.FeatureStaticIntfMethodInvoke, DiagKind.PLURAL), 170 STRICT_METHOD_CLASH_CHECK(JDK8), 171 EFFECTIVELY_FINAL_IN_INNER_CLASSES(JDK8), 172 TYPE_ANNOTATIONS(JDK8, Fragments.FeatureTypeAnnotations, DiagKind.PLURAL), 173 ANNOTATIONS_AFTER_TYPE_PARAMS(JDK8, Fragments.FeatureAnnotationsAfterTypeParams, DiagKind.PLURAL), 174 REPEATED_ANNOTATIONS(JDK8, Fragments.FeatureRepeatableAnnotations, DiagKind.PLURAL), 175 INTERSECTION_TYPES_IN_CAST(JDK8, Fragments.FeatureIntersectionTypesInCast, DiagKind.PLURAL), 176 GRAPH_INFERENCE(JDK8), 177 FUNCTIONAL_INTERFACE_MOST_SPECIFIC(JDK8), 178 POST_APPLICABILITY_VARARGS_ACCESS_CHECK(JDK8), 179 MAP_CAPTURES_TO_BOUNDS(MIN, JDK7), 180 PRIVATE_SAFE_VARARGS(JDK9), 181 DIAMOND_WITH_ANONYMOUS_CLASS_CREATION(JDK9, Fragments.FeatureDiamondAndAnonClass, DiagKind.NORMAL), 182 UNDERSCORE_IDENTIFIER(MIN, JDK8), 183 PRIVATE_INTERFACE_METHODS(JDK9, Fragments.FeaturePrivateIntfMethods, DiagKind.PLURAL), 184 LOCAL_VARIABLE_TYPE_INFERENCE(JDK10); 185 186 enum DiagKind { 187 NORMAL, 188 PLURAL; 189 } 190 191 private final Source minLevel; 192 private final Source maxLevel; 193 private final Fragment optFragment; 194 private final DiagKind optKind; 195 196 Feature(Source minLevel) { 197 this(minLevel, null, null); 198 } 199 200 Feature(Source minLevel, Fragment optFragment, DiagKind optKind) { 201 this(minLevel, MAX, optFragment, optKind); 202 } 203 204 Feature(Source minLevel, Source maxLevel) { 205 this(minLevel, maxLevel, null, null); 206 } 207 208 Feature(Source minLevel, Source maxLevel, Fragment optFragment, DiagKind optKind) { 209 this.minLevel = minLevel; 210 this.maxLevel = maxLevel; 211 this.optFragment = optFragment; 212 this.optKind = optKind; 213 } 214 215 public boolean allowedInSource(Source source) { 216 return source.compareTo(minLevel) >= 0 && 217 source.compareTo(maxLevel) <= 0; 218 } 219 220 public Fragment fragment(String sourceName) { 221 Assert.checkNonNull(optFragment); 222 return optKind == DiagKind.NORMAL ? 223 Fragments.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 224 Fragments.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 225 } 226 227 public Error error(String sourceName) { 228 Assert.checkNonNull(optFragment); 229 return optKind == DiagKind.NORMAL ? 230 Errors.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 231 Errors.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 232 } 233 } 234 235 public static SourceVersion toSourceVersion(Source source) { 236 switch(source) { 237 case JDK1_2: 238 return RELEASE_2; 239 case JDK1_3: 240 return RELEASE_3; 241 case JDK1_4: 242 return RELEASE_4; 243 case JDK5: 244 return RELEASE_5; 245 case JDK6: 246 return RELEASE_6; 247 case JDK7: 248 return RELEASE_7; 249 case JDK8: 250 return RELEASE_8; 251 case JDK9: 252 return RELEASE_9; 253 case JDK10: 254 return RELEASE_10; 255 case JDK11: 256 return RELEASE_11; 257 default: 258 return null; 259 } 260 } 261 }