1 /* 2 * Copyright (c) 2002, 2022, 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 private static final Context.Key<Source> sourceKey = new Context.Key<>(); 138 139 public static Source instance(Context context) { 140 Source instance = context.get(sourceKey); 141 if (instance == null) { 142 Options options = Options.instance(context); 143 String sourceString = options.get(SOURCE); 144 if (sourceString != null) instance = lookup(sourceString); 145 if (instance == null) instance = DEFAULT; 146 context.put(sourceKey, instance); 147 } 148 return instance; 149 } 150 151 public final String name; 152 153 private static final Map<String,Source> tab = new HashMap<>(); 154 static { 155 for (Source s : values()) { 156 tab.put(s.name, s); 157 } 158 tab.put("1.5", JDK5); // Make 5 an alias for 1.5 159 tab.put("1.6", JDK6); // Make 6 an alias for 1.6 160 tab.put("1.7", JDK7); // Make 7 an alias for 1.7 161 tab.put("1.8", JDK8); // Make 8 an alias for 1.8 162 tab.put("1.9", JDK9); // Make 9 an alias for 1.9 163 tab.put("1.10", JDK10); // Make 10 an alias for 1.10 164 // Decline to make 1.11 an alias for 11. 165 } 166 167 private Source(String name) { 168 this.name = name; 169 } 170 171 public static final Source MIN = Source.JDK8; 172 173 private static final Source MAX = values()[values().length - 1]; 174 175 public static final Source DEFAULT = MAX; 176 177 public static Source lookup(String name) { 178 return tab.get(name); 179 } 180 181 public boolean isSupported() { 182 return this.compareTo(MIN) >= 0; 183 } 184 185 public Target requiredTarget() { 186 return switch(this) { 187 case JDK21 -> Target.JDK1_21; 188 case JDK20 -> Target.JDK1_20; 189 case JDK19 -> Target.JDK1_19; 190 case JDK18 -> Target.JDK1_18; 191 case JDK17 -> Target.JDK1_17; 192 case JDK16 -> Target.JDK1_16; 193 case JDK15 -> Target.JDK1_15; 194 case JDK14 -> Target.JDK1_14; 195 case JDK13 -> Target.JDK1_13; 196 case JDK12 -> Target.JDK1_12; 197 case JDK11 -> Target.JDK1_11; 198 case JDK10 -> Target.JDK1_10; 199 case JDK9 -> Target.JDK1_9; 200 case JDK8 -> Target.JDK1_8; 201 case JDK7 -> Target.JDK1_7; 202 case JDK6 -> Target.JDK1_6; 203 case JDK5 -> Target.JDK1_5; 204 case JDK1_4 -> Target.JDK1_4; 205 default -> Target.JDK1_1; 206 }; 207 } 208 209 /** 210 * Models a feature of the Java programming language. Each feature can be associated with a 211 * minimum source level, a maximum source level and a diagnostic fragment describing the feature, 212 * which is used to generate error messages of the kind {@code feature XYZ not supported in source N}. 213 */ 214 public enum Feature { 215 216 MODULES(JDK9, Fragments.FeatureModules, DiagKind.PLURAL), 217 EFFECTIVELY_FINAL_VARIABLES_IN_TRY_WITH_RESOURCES(JDK9, Fragments.FeatureVarInTryWithResources, DiagKind.PLURAL), 218 DEPRECATION_ON_IMPORT(MIN, JDK8), 219 PRIVATE_SAFE_VARARGS(JDK9), 220 DIAMOND_WITH_ANONYMOUS_CLASS_CREATION(JDK9, Fragments.FeatureDiamondAndAnonClass, DiagKind.NORMAL), 221 UNDERSCORE_IDENTIFIER(MIN, JDK8), 222 PRIVATE_INTERFACE_METHODS(JDK9, Fragments.FeaturePrivateIntfMethods, DiagKind.PLURAL), 223 LOCAL_VARIABLE_TYPE_INFERENCE(JDK10), 224 VAR_SYNTAX_IMPLICIT_LAMBDAS(JDK11, Fragments.FeatureVarSyntaxInImplicitLambda, DiagKind.PLURAL), 225 IMPORT_ON_DEMAND_OBSERVABLE_PACKAGES(JDK1_2, JDK8), 226 SWITCH_MULTIPLE_CASE_LABELS(JDK14, Fragments.FeatureMultipleCaseLabels, DiagKind.PLURAL), 227 SWITCH_RULE(JDK14, Fragments.FeatureSwitchRules, DiagKind.PLURAL), 228 SWITCH_EXPRESSION(JDK14, Fragments.FeatureSwitchExpressions, DiagKind.PLURAL), 229 TEXT_BLOCKS(JDK15, Fragments.FeatureTextBlocks, DiagKind.PLURAL), 230 PATTERN_MATCHING_IN_INSTANCEOF(JDK16, Fragments.FeaturePatternMatchingInstanceof, DiagKind.NORMAL), 231 REIFIABLE_TYPES_INSTANCEOF(JDK16, Fragments.FeatureReifiableTypesInstanceof, DiagKind.PLURAL), 232 RECORDS(JDK16, Fragments.FeatureRecords, DiagKind.PLURAL), 233 SEALED_CLASSES(JDK17, Fragments.FeatureSealedClasses, DiagKind.PLURAL), 234 CASE_NULL(JDK17, Fragments.FeatureCaseNull, DiagKind.NORMAL), 235 PATTERN_SWITCH(JDK17, Fragments.FeaturePatternSwitch, DiagKind.PLURAL), 236 REDUNDANT_STRICTFP(JDK17), 237 UNCONDITIONAL_PATTERN_IN_INSTANCEOF(JDK19, Fragments.FeatureUnconditionalPatternsInInstanceof, DiagKind.PLURAL), 238 RECORD_PATTERNS(JDK19, Fragments.FeatureDeconstructionPatterns, DiagKind.PLURAL), 239 PRIMITIVE_CLASSES(JDK19, Fragments.FeaturePrimitiveClasses, DiagKind.PLURAL), 240 VALUE_CLASSES(JDK19, Fragments.FeatureValueClasses, DiagKind.PLURAL), 241 ; 242 243 enum DiagKind { 244 NORMAL, 245 PLURAL; 246 } 247 248 private final Source minLevel; 249 private final Source maxLevel; 250 private final Fragment optFragment; 251 private final DiagKind optKind; 252 253 Feature(Source minLevel) { 254 this(minLevel, null, null); 255 } 256 257 Feature(Source minLevel, Fragment optFragment, DiagKind optKind) { 258 this(minLevel, MAX, optFragment, optKind); 259 } 260 261 Feature(Source minLevel, Source maxLevel) { 262 this(minLevel, maxLevel, null, null); 263 } 264 265 Feature(Source minLevel, Source maxLevel, Fragment optFragment, DiagKind optKind) { 266 this.minLevel = minLevel; 267 this.maxLevel = maxLevel; 268 this.optFragment = optFragment; 269 this.optKind = optKind; 270 } 271 272 public boolean allowedInSource(Source source) { 273 return source.compareTo(minLevel) >= 0 && 274 source.compareTo(maxLevel) <= 0; 275 } 276 277 public boolean isPlural() { 278 Assert.checkNonNull(optKind); 279 return optKind == DiagKind.PLURAL; 280 } 281 282 public Fragment nameFragment() { 283 Assert.checkNonNull(optFragment); 284 return optFragment; 285 } 286 287 public Fragment fragment(String sourceName) { 288 Assert.checkNonNull(optFragment); 289 return optKind == DiagKind.NORMAL ? 290 Fragments.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 291 Fragments.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 292 } 293 294 public Error error(String sourceName) { 295 Assert.checkNonNull(optFragment); 296 if (this == PRIMITIVE_CLASSES) { 297 return Errors.PrimitiveClassesNotSupported(minLevel.name); 298 } 299 return optKind == DiagKind.NORMAL ? 300 Errors.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 301 Errors.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 302 } 303 } 304 305 public static SourceVersion toSourceVersion(Source source) { 306 return switch(source) { 307 case JDK1_2 -> RELEASE_2; 308 case JDK1_3 -> RELEASE_3; 309 case JDK1_4 -> RELEASE_4; 310 case JDK5 -> RELEASE_5; 311 case JDK6 -> RELEASE_6; 312 case JDK7 -> RELEASE_7; 313 case JDK8 -> RELEASE_8; 314 case JDK9 -> RELEASE_9; 315 case JDK10 -> RELEASE_10; 316 case JDK11 -> RELEASE_11; 317 case JDK12 -> RELEASE_12; 318 case JDK13 -> RELEASE_13; 319 case JDK14 -> RELEASE_14; 320 case JDK15 -> RELEASE_15; 321 case JDK16 -> RELEASE_16; 322 case JDK17 -> RELEASE_17; 323 case JDK18 -> RELEASE_18; 324 case JDK19 -> RELEASE_19; 325 case JDK20 -> RELEASE_20; 326 case JDK21 -> RELEASE_21; 327 default -> null; 328 }; 329 } 330 }