1 /* 2 * Copyright (c) 2002, 2024, 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 local-variable type inference (var). */ 82 JDK10("10"), 83 84 /** 1.11 local-variable syntax for lambda parameters */ 85 JDK11("11"), 86 87 /** 12, no language features; switch expression in preview */ 88 JDK12("12"), 89 90 /** 91 * 13, no language features; text blocks and revised switch 92 * expressions in preview 93 */ 94 JDK13("13"), 95 96 /** 97 * 14, switch expressions; pattern matching, records, and revised 98 * text blocks in preview 99 */ 100 JDK14("14"), 101 102 /** 103 * 15, text blocks 104 */ 105 JDK15("15"), 106 107 /** 108 * 16, records and pattern matching for instanceof 109 */ 110 JDK16("16"), 111 112 /** 113 * 17, sealed classes, restoration of always-strict floating-point 114 */ 115 JDK17("17"), 116 117 /** 118 * 18, no major changes 119 */ 120 JDK18("18"), 121 122 /** 123 * 19, no major changes 124 */ 125 JDK19("19"), 126 127 /** 128 * 20, no major changes 129 */ 130 JDK20("20"), 131 132 /** 133 * 21, tbd 134 */ 135 JDK21("21"), 136 137 /** 138 * 22, tbd 139 */ 140 JDK22("22"), 141 142 /** 143 * 23, tbd 144 */ 145 JDK23("23"), 146 ; // Reduce code churn when appending new constants 147 148 private static final Context.Key<Source> sourceKey = new Context.Key<>(); 149 150 public static Source instance(Context context) { 151 Source instance = context.get(sourceKey); 152 if (instance == null) { 153 Options options = Options.instance(context); 154 String sourceString = options.get(SOURCE); 155 if (sourceString != null) instance = lookup(sourceString); 156 if (instance == null) instance = DEFAULT; 157 context.put(sourceKey, instance); 158 } 159 return instance; 160 } 161 162 public final String name; 163 164 private static final Map<String,Source> tab = new HashMap<>(); 165 static { 166 for (Source s : values()) { 167 tab.put(s.name, s); 168 } 169 tab.put("1.5", JDK5); // Make 5 an alias for 1.5 170 tab.put("1.6", JDK6); // Make 6 an alias for 1.6 171 tab.put("1.7", JDK7); // Make 7 an alias for 1.7 172 tab.put("1.8", JDK8); // Make 8 an alias for 1.8 173 tab.put("1.9", JDK9); // Make 9 an alias for 1.9 174 tab.put("1.10", JDK10); // Make 10 an alias for 1.10 175 // Decline to make 1.11 an alias for 11. 176 } 177 178 private Source(String name) { 179 this.name = name; 180 } 181 182 public static final Source MIN = Source.JDK8; 183 184 private static final Source MAX = values()[values().length - 1]; 185 186 public static final Source DEFAULT = MAX; 187 188 public static Source lookup(String name) { 189 return tab.get(name); 190 } 191 192 public boolean isSupported() { 193 return this.compareTo(MIN) >= 0; 194 } 195 196 public Target requiredTarget() { 197 return switch(this) { 198 case JDK23 -> Target.JDK1_23; 199 case JDK22 -> Target.JDK1_22; 200 case JDK21 -> Target.JDK1_21; 201 case JDK20 -> Target.JDK1_20; 202 case JDK19 -> Target.JDK1_19; 203 case JDK18 -> Target.JDK1_18; 204 case JDK17 -> Target.JDK1_17; 205 case JDK16 -> Target.JDK1_16; 206 case JDK15 -> Target.JDK1_15; 207 case JDK14 -> Target.JDK1_14; 208 case JDK13 -> Target.JDK1_13; 209 case JDK12 -> Target.JDK1_12; 210 case JDK11 -> Target.JDK1_11; 211 case JDK10 -> Target.JDK1_10; 212 case JDK9 -> Target.JDK1_9; 213 case JDK8 -> Target.JDK1_8; 214 case JDK7 -> Target.JDK1_7; 215 case JDK6 -> Target.JDK1_6; 216 case JDK5 -> Target.JDK1_5; 217 case JDK1_4 -> Target.JDK1_4; 218 default -> Target.JDK1_1; 219 }; 220 } 221 222 /** 223 * Models a feature of the Java programming language. Each feature can be associated with a 224 * minimum source level, a maximum source level and a diagnostic fragment describing the feature, 225 * which is used to generate error messages of the kind {@code feature XYZ not supported in source N}. 226 */ 227 public enum Feature { 228 229 MODULES(JDK9, Fragments.FeatureModules, DiagKind.PLURAL), 230 EFFECTIVELY_FINAL_VARIABLES_IN_TRY_WITH_RESOURCES(JDK9, Fragments.FeatureVarInTryWithResources, DiagKind.PLURAL), 231 DEPRECATION_ON_IMPORT(MIN, JDK8), 232 PRIVATE_SAFE_VARARGS(JDK9), 233 DIAMOND_WITH_ANONYMOUS_CLASS_CREATION(JDK9, Fragments.FeatureDiamondAndAnonClass, DiagKind.NORMAL), 234 UNDERSCORE_IDENTIFIER(MIN, JDK8), 235 PRIVATE_INTERFACE_METHODS(JDK9, Fragments.FeaturePrivateIntfMethods, DiagKind.PLURAL), 236 LOCAL_VARIABLE_TYPE_INFERENCE(JDK10), 237 VAR_SYNTAX_IMPLICIT_LAMBDAS(JDK11, Fragments.FeatureVarSyntaxInImplicitLambda, DiagKind.PLURAL), 238 IMPORT_ON_DEMAND_OBSERVABLE_PACKAGES(JDK1_2, JDK8), 239 SWITCH_MULTIPLE_CASE_LABELS(JDK14, Fragments.FeatureMultipleCaseLabels, DiagKind.PLURAL), 240 SWITCH_RULE(JDK14, Fragments.FeatureSwitchRules, DiagKind.PLURAL), 241 SWITCH_EXPRESSION(JDK14, Fragments.FeatureSwitchExpressions, DiagKind.PLURAL), 242 NO_TARGET_ANNOTATION_APPLICABILITY(JDK14), 243 TEXT_BLOCKS(JDK15, Fragments.FeatureTextBlocks, DiagKind.PLURAL), 244 PATTERN_MATCHING_IN_INSTANCEOF(JDK16, Fragments.FeaturePatternMatchingInstanceof, DiagKind.NORMAL), 245 REIFIABLE_TYPES_INSTANCEOF(JDK16, Fragments.FeatureReifiableTypesInstanceof, DiagKind.PLURAL), 246 RECORDS(JDK16, Fragments.FeatureRecords, DiagKind.PLURAL), 247 SEALED_CLASSES(JDK17, Fragments.FeatureSealedClasses, DiagKind.PLURAL), 248 CASE_NULL(JDK21, Fragments.FeatureCaseNull, DiagKind.NORMAL), 249 PATTERN_SWITCH(JDK21, Fragments.FeaturePatternSwitch, DiagKind.PLURAL), 250 REDUNDANT_STRICTFP(JDK17), 251 UNCONDITIONAL_PATTERN_IN_INSTANCEOF(JDK21, Fragments.FeatureUnconditionalPatternsInInstanceof, DiagKind.PLURAL), 252 RECORD_PATTERNS(JDK21, Fragments.FeatureDeconstructionPatterns, DiagKind.PLURAL), 253 IMPLICIT_CLASSES(JDK21, Fragments.FeatureImplicitClasses, DiagKind.PLURAL), 254 WARN_ON_ILLEGAL_UTF8(MIN, JDK21), 255 UNNAMED_VARIABLES(JDK22, Fragments.FeatureUnnamedVariables, DiagKind.PLURAL), 256 PRIMITIVE_PATTERNS(JDK23, Fragments.FeaturePrimitivePatterns, DiagKind.PLURAL), 257 SUPER_INIT(JDK22, Fragments.FeatureSuperInit, DiagKind.NORMAL), 258 REFLECT_METHODS(JDK22, Fragments.FeatureReflectMethods, DiagKind.NORMAL), 259 ; 260 261 enum DiagKind { 262 NORMAL, 263 PLURAL; 264 } 265 266 private final Source minLevel; 267 private final Source maxLevel; 268 private final Fragment optFragment; 269 private final DiagKind optKind; 270 271 Feature(Source minLevel) { 272 this(minLevel, null, null); 273 } 274 275 Feature(Source minLevel, Fragment optFragment, DiagKind optKind) { 276 this(minLevel, MAX, optFragment, optKind); 277 } 278 279 Feature(Source minLevel, Source maxLevel) { 280 this(minLevel, maxLevel, null, null); 281 } 282 283 Feature(Source minLevel, Source maxLevel, Fragment optFragment, DiagKind optKind) { 284 this.minLevel = minLevel; 285 this.maxLevel = maxLevel; 286 this.optFragment = optFragment; 287 this.optKind = optKind; 288 } 289 290 public boolean allowedInSource(Source source) { 291 return source.compareTo(minLevel) >= 0 && 292 source.compareTo(maxLevel) <= 0; 293 } 294 295 public boolean isPlural() { 296 Assert.checkNonNull(optKind); 297 return optKind == DiagKind.PLURAL; 298 } 299 300 public Fragment nameFragment() { 301 Assert.checkNonNull(optFragment); 302 return optFragment; 303 } 304 305 public Fragment fragment(String sourceName) { 306 Assert.checkNonNull(optFragment); 307 return optKind == DiagKind.NORMAL ? 308 Fragments.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 309 Fragments.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 310 } 311 312 public Error error(String sourceName) { 313 Assert.checkNonNull(optFragment); 314 return optKind == DiagKind.NORMAL ? 315 Errors.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 316 Errors.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 317 } 318 } 319 320 public static SourceVersion toSourceVersion(Source source) { 321 return switch(source) { 322 case JDK1_2 -> RELEASE_2; 323 case JDK1_3 -> RELEASE_3; 324 case JDK1_4 -> RELEASE_4; 325 case JDK5 -> RELEASE_5; 326 case JDK6 -> RELEASE_6; 327 case JDK7 -> RELEASE_7; 328 case JDK8 -> RELEASE_8; 329 case JDK9 -> RELEASE_9; 330 case JDK10 -> RELEASE_10; 331 case JDK11 -> RELEASE_11; 332 case JDK12 -> RELEASE_12; 333 case JDK13 -> RELEASE_13; 334 case JDK14 -> RELEASE_14; 335 case JDK15 -> RELEASE_15; 336 case JDK16 -> RELEASE_16; 337 case JDK17 -> RELEASE_17; 338 case JDK18 -> RELEASE_18; 339 case JDK19 -> RELEASE_19; 340 case JDK20 -> RELEASE_20; 341 case JDK21 -> RELEASE_21; 342 case JDK22 -> RELEASE_22; 343 case JDK23 -> RELEASE_23; 344 default -> null; 345 }; 346 } 347 }