1 /* 2 * Copyright (c) 2002, 2019, 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 98 */ 99 JDK14("14"); 100 101 private static final Context.Key<Source> sourceKey = new Context.Key<>(); 102 103 public static Source instance(Context context) { 104 Source instance = context.get(sourceKey); 105 if (instance == null) { 106 Options options = Options.instance(context); 107 String sourceString = options.get(SOURCE); 108 if (sourceString != null) instance = lookup(sourceString); 109 if (instance == null) instance = DEFAULT; 110 context.put(sourceKey, instance); 111 } 112 return instance; 113 } 114 115 public final String name; 116 117 private static final Map<String,Source> tab = new HashMap<>(); 118 static { 119 for (Source s : values()) { 120 tab.put(s.name, s); 121 } 122 tab.put("1.5", JDK5); // Make 5 an alias for 1.5 123 tab.put("1.6", JDK6); // Make 6 an alias for 1.6 124 tab.put("1.7", JDK7); // Make 7 an alias for 1.7 125 tab.put("1.8", JDK8); // Make 8 an alias for 1.8 126 tab.put("1.9", JDK9); // Make 9 an alias for 1.9 127 tab.put("1.10", JDK10); // Make 10 an alias for 1.10 128 // Decline to make 1.11 an alias for 11. 129 } 130 131 private Source(String name) { 132 this.name = name; 133 } 134 135 public static final Source MIN = Source.JDK7; 136 137 private static final Source MAX = values()[values().length - 1]; 138 139 public static final Source DEFAULT = MAX; 140 141 public static Source lookup(String name) { 142 return tab.get(name); 143 } 144 145 public boolean isSupported() { 146 return this.compareTo(MIN) >= 0; 147 } 148 149 public Target requiredTarget() { 150 if (this.compareTo(JDK14) >= 0) return Target.JDK1_14; 151 if (this.compareTo(JDK13) >= 0) return Target.JDK1_13; 152 if (this.compareTo(JDK12) >= 0) return Target.JDK1_12; 153 if (this.compareTo(JDK11) >= 0) return Target.JDK1_11; 154 if (this.compareTo(JDK10) >= 0) return Target.JDK1_10; 155 if (this.compareTo(JDK9) >= 0) return Target.JDK1_9; 156 if (this.compareTo(JDK8) >= 0) return Target.JDK1_8; 157 if (this.compareTo(JDK7) >= 0) return Target.JDK1_7; 158 if (this.compareTo(JDK6) >= 0) return Target.JDK1_6; 159 if (this.compareTo(JDK5) >= 0) return Target.JDK1_5; 160 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4; 161 return Target.JDK1_1; 162 } 163 164 /** 165 * Models a feature of the Java programming language. Each feature can be associated with a 166 * minimum source level, a maximum source level and a diagnostic fragment describing the feature, 167 * which is used to generate error messages of the kind {@code feature XYZ not supported in source N}. 168 */ 169 public enum Feature { 170 171 DIAMOND(JDK7, Fragments.FeatureDiamond, DiagKind.NORMAL), 172 MODULES(JDK9, Fragments.FeatureModules, DiagKind.PLURAL), 173 EFFECTIVELY_FINAL_VARIABLES_IN_TRY_WITH_RESOURCES(JDK9, Fragments.FeatureVarInTryWithResources, DiagKind.PLURAL), 174 DEPRECATION_ON_IMPORT(MIN, JDK8), 175 POLY(JDK8), 176 LAMBDA(JDK8, Fragments.FeatureLambda, DiagKind.PLURAL), 177 METHOD_REFERENCES(JDK8, Fragments.FeatureMethodReferences, DiagKind.PLURAL), 178 DEFAULT_METHODS(JDK8, Fragments.FeatureDefaultMethods, DiagKind.PLURAL), 179 STATIC_INTERFACE_METHODS(JDK8, Fragments.FeatureStaticIntfMethods, DiagKind.PLURAL), 180 STATIC_INTERFACE_METHODS_INVOKE(JDK8, Fragments.FeatureStaticIntfMethodInvoke, DiagKind.PLURAL), 181 STRICT_METHOD_CLASH_CHECK(JDK8), 182 EFFECTIVELY_FINAL_IN_INNER_CLASSES(JDK8), 183 TYPE_ANNOTATIONS(JDK8, Fragments.FeatureTypeAnnotations, DiagKind.PLURAL), 184 ANNOTATIONS_AFTER_TYPE_PARAMS(JDK8, Fragments.FeatureAnnotationsAfterTypeParams, DiagKind.PLURAL), 185 REPEATED_ANNOTATIONS(JDK8, Fragments.FeatureRepeatableAnnotations, DiagKind.PLURAL), 186 INTERSECTION_TYPES_IN_CAST(JDK8, Fragments.FeatureIntersectionTypesInCast, DiagKind.PLURAL), 187 GRAPH_INFERENCE(JDK8), 188 FUNCTIONAL_INTERFACE_MOST_SPECIFIC(JDK8), 189 POST_APPLICABILITY_VARARGS_ACCESS_CHECK(JDK8), 190 MAP_CAPTURES_TO_BOUNDS(MIN, JDK7), 191 PRIVATE_SAFE_VARARGS(JDK9), 192 DIAMOND_WITH_ANONYMOUS_CLASS_CREATION(JDK9, Fragments.FeatureDiamondAndAnonClass, DiagKind.NORMAL), 193 UNDERSCORE_IDENTIFIER(MIN, JDK8), 194 PRIVATE_INTERFACE_METHODS(JDK9, Fragments.FeaturePrivateIntfMethods, DiagKind.PLURAL), 195 LOCAL_VARIABLE_TYPE_INFERENCE(JDK10), 196 VAR_SYNTAX_IMPLICIT_LAMBDAS(JDK11, Fragments.FeatureVarSyntaxInImplicitLambda, DiagKind.PLURAL), 197 IMPORT_ON_DEMAND_OBSERVABLE_PACKAGES(JDK1_2, JDK8), 198 SWITCH_MULTIPLE_CASE_LABELS(JDK14, Fragments.FeatureMultipleCaseLabels, DiagKind.PLURAL), 199 SWITCH_RULE(JDK14, Fragments.FeatureSwitchRules, DiagKind.PLURAL), 200 SWITCH_EXPRESSION(JDK14, Fragments.FeatureSwitchExpressions, DiagKind.PLURAL), 201 TEXT_BLOCKS(JDK14, Fragments.FeatureTextBlocks, DiagKind.PLURAL), 202 PATTERN_MATCHING_IN_INSTANCEOF(JDK14, Fragments.FeaturePatternMatchingInstanceof, DiagKind.NORMAL), 203 REIFIABLE_TYPES_INSTANCEOF(JDK14, Fragments.FeatureReifiableTypesInstanceof, DiagKind.PLURAL), 204 RECORDS(JDK14, Fragments.FeatureRecords, DiagKind.PLURAL), 205 ; 206 207 enum DiagKind { 208 NORMAL, 209 PLURAL; 210 } 211 212 private final Source minLevel; 213 private final Source maxLevel; 214 private final Fragment optFragment; 215 private final DiagKind optKind; 216 217 Feature(Source minLevel) { 218 this(minLevel, null, null); 219 } 220 221 Feature(Source minLevel, Fragment optFragment, DiagKind optKind) { 222 this(minLevel, MAX, optFragment, optKind); 223 } 224 225 Feature(Source minLevel, Source maxLevel) { 226 this(minLevel, maxLevel, null, null); 227 } 228 229 Feature(Source minLevel, Source maxLevel, Fragment optFragment, DiagKind optKind) { 230 this.minLevel = minLevel; 231 this.maxLevel = maxLevel; 232 this.optFragment = optFragment; 233 this.optKind = optKind; 234 } 235 236 public boolean allowedInSource(Source source) { 237 return source.compareTo(minLevel) >= 0 && 238 source.compareTo(maxLevel) <= 0; 239 } 240 241 public boolean isPlural() { 242 Assert.checkNonNull(optKind); 243 return optKind == DiagKind.PLURAL; 244 } 245 246 public Fragment nameFragment() { 247 Assert.checkNonNull(optFragment); 248 return optFragment; 249 } 250 251 public Fragment fragment(String sourceName) { 252 Assert.checkNonNull(optFragment); 253 return optKind == DiagKind.NORMAL ? 254 Fragments.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 255 Fragments.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 256 } 257 258 public Error error(String sourceName) { 259 Assert.checkNonNull(optFragment); 260 return optKind == DiagKind.NORMAL ? 261 Errors.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : 262 Errors.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); 263 } 264 } 265 266 public static SourceVersion toSourceVersion(Source source) { 267 switch(source) { 268 case JDK1_2: 269 return RELEASE_2; 270 case JDK1_3: 271 return RELEASE_3; 272 case JDK1_4: 273 return RELEASE_4; 274 case JDK5: 275 return RELEASE_5; 276 case JDK6: 277 return RELEASE_6; 278 case JDK7: 279 return RELEASE_7; 280 case JDK8: 281 return RELEASE_8; 282 case JDK9: 283 return RELEASE_9; 284 case JDK10: 285 return RELEASE_10; 286 case JDK11: 287 return RELEASE_11; 288 case JDK12: 289 return RELEASE_12; 290 case JDK13: 291 return RELEASE_13; 292 case JDK14: 293 return RELEASE_14; 294 default: 295 return null; 296 } 297 } 298 }