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