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.util.*; 35 import static com.sun.tools.javac.main.Option.*; 36 37 /** The source language version accepted. 38 * 39 * <p><b>This is NOT part of any supported API. 40 * If you write code that depends on this, you do so at your own risk. 41 * This code and its internal interfaces are subject to change or 42 * deletion without notice.</b> 43 */ 44 public enum Source { 45 /** 1.0 had no inner classes, and so could not pass the JCK. */ 46 // public static final Source JDK1_0 = new Source("1.0"); 47 48 /** 1.1 did not have strictfp, and so could not pass the JCK. */ 49 // public static final Source JDK1_1 = new Source("1.1"); 50 51 /** 1.2 introduced strictfp. */ 52 JDK1_2("1.2"), 53 54 /** 1.3 is the same language as 1.2. */ 55 JDK1_3("1.3"), 56 57 /** 1.4 introduced assert. */ 58 JDK1_4("1.4"), 59 60 /** 1.5 introduced generics, attributes, foreach, boxing, static import, 61 * covariant return, enums, varargs, et al. */ 62 JDK1_5("1.5"), 63 64 /** 1.6 reports encoding problems as errors instead of warnings. */ 65 JDK1_6("1.6"), 66 67 /** 1.7 introduced try-with-resources, multi-catch, string switch, etc. */ 68 JDK1_7("1.7"), 69 70 /** 1.8 lambda expressions and default methods. */ 71 JDK1_8("1.8"), 72 73 /** 1.9 modularity. */ 74 JDK1_9("1.9"), 75 76 /** 1.10 covers the to be determined language features that will be added in JDK 10. */ 77 JDK1_10("1.10"); 78 79 private static final Context.Key<Source> sourceKey = new Context.Key<>(); 80 81 public static Source instance(Context context) { 82 Source instance = context.get(sourceKey); 83 if (instance == null) { 84 Options options = Options.instance(context); 85 String sourceString = options.get(SOURCE); 86 if (sourceString != null) instance = lookup(sourceString); 87 if (instance == null) instance = DEFAULT; 88 context.put(sourceKey, instance); 89 } 90 return instance; 91 } 92 93 public final String name; 94 95 private static final Map<String,Source> tab = new HashMap<>(); 96 static { 97 for (Source s : values()) { 98 tab.put(s.name, s); 99 } 100 tab.put("5", JDK1_5); // Make 5 an alias for 1.5 101 tab.put("6", JDK1_6); // Make 6 an alias for 1.6 102 tab.put("7", JDK1_7); // Make 7 an alias for 1.7 103 tab.put("8", JDK1_8); // Make 8 an alias for 1.8 104 tab.put("9", JDK1_9); // Make 9 an alias for 1.9 105 tab.put("10", JDK1_10); // Make 10 an alias for 1.10 106 } 107 108 private Source(String name) { 109 this.name = name; 110 } 111 112 public static final Source MIN = Source.JDK1_6; 113 114 private static final Source MAX = values()[values().length - 1]; 115 116 public static final Source DEFAULT = MAX; 117 118 public static Source lookup(String name) { 119 return tab.get(name); 120 } 121 122 public Target requiredTarget() { 123 if (this.compareTo(JDK1_10) >= 0) return Target.JDK1_10; 124 if (this.compareTo(JDK1_9) >= 0) return Target.JDK1_9; 125 if (this.compareTo(JDK1_8) >= 0) return Target.JDK1_8; 126 if (this.compareTo(JDK1_7) >= 0) return Target.JDK1_7; 127 if (this.compareTo(JDK1_6) >= 0) return Target.JDK1_6; 128 if (this.compareTo(JDK1_5) >= 0) return Target.JDK1_5; 129 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4; 130 return Target.JDK1_1; 131 } 132 133 public boolean allowDiamond() { 134 return compareTo(JDK1_7) >= 0; 135 } 136 public boolean allowMulticatch() { 137 return compareTo(JDK1_7) >= 0; 138 } 139 public boolean allowImprovedRethrowAnalysis() { 140 return compareTo(JDK1_7) >= 0; 141 } 142 public boolean allowImprovedCatchAnalysis() { 143 return compareTo(JDK1_7) >= 0; 144 } 145 public boolean allowModules() { 146 return compareTo(JDK1_9) >= 0; 147 } 148 public boolean allowTryWithResources() { 149 return compareTo(JDK1_7) >= 0; 150 } 151 public boolean allowEffectivelyFinalVariablesInTryWithResources() { 152 return compareTo(JDK1_9) >= 0; 153 } 154 public boolean allowBinaryLiterals() { 155 return compareTo(JDK1_7) >= 0; 156 } 157 public boolean allowUnderscoresInLiterals() { 158 return compareTo(JDK1_7) >= 0; 159 } 160 public boolean allowStringsInSwitch() { 161 return compareTo(JDK1_7) >= 0; 162 } 163 public boolean allowDeprecationOnImport() { 164 return compareTo(JDK1_9) < 0; 165 } 166 public boolean allowSimplifiedVarargs() { 167 return compareTo(JDK1_7) >= 0; 168 } 169 public boolean allowObjectToPrimitiveCast() { 170 return compareTo(JDK1_7) >= 0; 171 } 172 public boolean enforceThisDotInit() { 173 return compareTo(JDK1_7) >= 0; 174 } 175 public boolean allowPoly() { 176 return compareTo(JDK1_8) >= 0; 177 } 178 public boolean allowLambda() { 179 return compareTo(JDK1_8) >= 0; 180 } 181 public boolean allowMethodReferences() { 182 return compareTo(JDK1_8) >= 0; 183 } 184 public boolean allowDefaultMethods() { 185 return compareTo(JDK1_8) >= 0; 186 } 187 public boolean allowStaticInterfaceMethods() { 188 return compareTo(JDK1_8) >= 0; 189 } 190 public boolean allowStrictMethodClashCheck() { 191 return compareTo(JDK1_8) >= 0; 192 } 193 public boolean allowEffectivelyFinalInInnerClasses() { 194 return compareTo(JDK1_8) >= 0; 195 } 196 public boolean allowTypeAnnotations() { 197 return compareTo(JDK1_8) >= 0; 198 } 199 public boolean allowAnnotationsAfterTypeParams() { 200 return compareTo(JDK1_8) >= 0; 201 } 202 public boolean allowRepeatedAnnotations() { 203 return compareTo(JDK1_8) >= 0; 204 } 205 public boolean allowIntersectionTypesInCast() { 206 return compareTo(JDK1_8) >= 0; 207 } 208 public boolean allowGraphInference() { 209 return compareTo(JDK1_8) >= 0; 210 } 211 public boolean allowFunctionalInterfaceMostSpecific() { 212 return compareTo(JDK1_8) >= 0; 213 } 214 public boolean allowPostApplicabilityVarargsAccessCheck() { 215 return compareTo(JDK1_8) >= 0; 216 } 217 public boolean mapCapturesToBounds() { 218 return compareTo(JDK1_8) < 0; 219 } 220 public boolean allowPrivateSafeVarargs() { 221 return compareTo(JDK1_9) >= 0; 222 } 223 public boolean allowDiamondWithAnonymousClassCreation() { 224 return compareTo(JDK1_9) >= 0; 225 } 226 public boolean allowUnderscoreIdentifier() { 227 return compareTo(JDK1_8) <= 0; 228 } 229 public boolean allowPrivateInterfaceMethods() { return compareTo(JDK1_9) >= 0; } 230 public static SourceVersion toSourceVersion(Source source) { 231 switch(source) { 232 case JDK1_2: 233 return RELEASE_2; 234 case JDK1_3: 235 return RELEASE_3; 236 case JDK1_4: 237 return RELEASE_4; 238 case JDK1_5: 239 return RELEASE_5; 240 case JDK1_6: 241 return RELEASE_6; 242 case JDK1_7: 243 return RELEASE_7; 244 case JDK1_8: 245 return RELEASE_8; 246 case JDK1_9: 247 return RELEASE_9; 248 case JDK1_10: 249 return RELEASE_10; 250 default: 251 return null; 252 } 253 } 254 }