Source.java revision 3819:49170d831308
1/* 2 * Copyright (c) 2002, 2015, 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 26package com.sun.tools.javac.code; 27 28import java.util.*; 29 30import javax.lang.model.SourceVersion; 31import static javax.lang.model.SourceVersion.*; 32 33import com.sun.tools.javac.jvm.Target; 34import com.sun.tools.javac.util.*; 35import 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 */ 44public 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 covers the to be determined language features that will be added in JDK 9. */ 74 JDK1_9("1.9"); 75 76 private static final Context.Key<Source> sourceKey = new Context.Key<>(); 77 78 public static Source instance(Context context) { 79 Source instance = context.get(sourceKey); 80 if (instance == null) { 81 Options options = Options.instance(context); 82 String sourceString = options.get(SOURCE); 83 if (sourceString != null) instance = lookup(sourceString); 84 if (instance == null) instance = DEFAULT; 85 context.put(sourceKey, instance); 86 } 87 return instance; 88 } 89 90 public final String name; 91 92 private static final Map<String,Source> tab = new HashMap<>(); 93 static { 94 for (Source s : values()) { 95 tab.put(s.name, s); 96 } 97 tab.put("5", JDK1_5); // Make 5 an alias for 1.5 98 tab.put("6", JDK1_6); // Make 6 an alias for 1.6 99 tab.put("7", JDK1_7); // Make 7 an alias for 1.7 100 tab.put("8", JDK1_8); // Make 8 an alias for 1.8 101 tab.put("9", JDK1_9); // Make 9 an alias for 1.9 102 } 103 104 private Source(String name) { 105 this.name = name; 106 } 107 108 public static final Source MIN = Source.JDK1_6; 109 110 private static final Source MAX = values()[values().length - 1]; 111 112 public static final Source DEFAULT = MAX; 113 114 public static Source lookup(String name) { 115 return tab.get(name); 116 } 117 118 public Target requiredTarget() { 119 if (this.compareTo(JDK1_9) >= 0) return Target.JDK1_9; 120 if (this.compareTo(JDK1_8) >= 0) return Target.JDK1_8; 121 if (this.compareTo(JDK1_7) >= 0) return Target.JDK1_7; 122 if (this.compareTo(JDK1_6) >= 0) return Target.JDK1_6; 123 if (this.compareTo(JDK1_5) >= 0) return Target.JDK1_5; 124 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4; 125 return Target.JDK1_1; 126 } 127 128 public boolean allowDiamond() { 129 return compareTo(JDK1_7) >= 0; 130 } 131 public boolean allowMulticatch() { 132 return compareTo(JDK1_7) >= 0; 133 } 134 public boolean allowImprovedRethrowAnalysis() { 135 return compareTo(JDK1_7) >= 0; 136 } 137 public boolean allowImprovedCatchAnalysis() { 138 return compareTo(JDK1_7) >= 0; 139 } 140 public boolean allowModules() { 141 return compareTo(JDK1_9) >= 0; 142 } 143 public boolean allowTryWithResources() { 144 return compareTo(JDK1_7) >= 0; 145 } 146 public boolean allowEffectivelyFinalVariablesInTryWithResources() { 147 return compareTo(JDK1_9) >= 0; 148 } 149 public boolean allowBinaryLiterals() { 150 return compareTo(JDK1_7) >= 0; 151 } 152 public boolean allowUnderscoresInLiterals() { 153 return compareTo(JDK1_7) >= 0; 154 } 155 public boolean allowStringsInSwitch() { 156 return compareTo(JDK1_7) >= 0; 157 } 158 public boolean allowDeprecationOnImport() { 159 return compareTo(JDK1_9) < 0; 160 } 161 public boolean allowSimplifiedVarargs() { 162 return compareTo(JDK1_7) >= 0; 163 } 164 public boolean allowObjectToPrimitiveCast() { 165 return compareTo(JDK1_7) >= 0; 166 } 167 public boolean enforceThisDotInit() { 168 return compareTo(JDK1_7) >= 0; 169 } 170 public boolean allowPoly() { 171 return compareTo(JDK1_8) >= 0; 172 } 173 public boolean allowLambda() { 174 return compareTo(JDK1_8) >= 0; 175 } 176 public boolean allowMethodReferences() { 177 return compareTo(JDK1_8) >= 0; 178 } 179 public boolean allowDefaultMethods() { 180 return compareTo(JDK1_8) >= 0; 181 } 182 public boolean allowStaticInterfaceMethods() { 183 return compareTo(JDK1_8) >= 0; 184 } 185 public boolean allowStrictMethodClashCheck() { 186 return compareTo(JDK1_8) >= 0; 187 } 188 public boolean allowEffectivelyFinalInInnerClasses() { 189 return compareTo(JDK1_8) >= 0; 190 } 191 public boolean allowTypeAnnotations() { 192 return compareTo(JDK1_8) >= 0; 193 } 194 public boolean allowAnnotationsAfterTypeParams() { 195 return compareTo(JDK1_8) >= 0; 196 } 197 public boolean allowRepeatedAnnotations() { 198 return compareTo(JDK1_8) >= 0; 199 } 200 public boolean allowIntersectionTypesInCast() { 201 return compareTo(JDK1_8) >= 0; 202 } 203 public boolean allowGraphInference() { 204 return compareTo(JDK1_8) >= 0; 205 } 206 public boolean allowFunctionalInterfaceMostSpecific() { 207 return compareTo(JDK1_8) >= 0; 208 } 209 public boolean allowPostApplicabilityVarargsAccessCheck() { 210 return compareTo(JDK1_8) >= 0; 211 } 212 public boolean mapCapturesToBounds() { 213 return compareTo(JDK1_8) < 0; 214 } 215 public boolean allowPrivateSafeVarargs() { 216 return compareTo(JDK1_9) >= 0; 217 } 218 public boolean allowDiamondWithAnonymousClassCreation() { 219 return compareTo(JDK1_9) >= 0; 220 } 221 public boolean allowUnderscoreIdentifier() { 222 return compareTo(JDK1_8) <= 0; 223 } 224 public boolean allowPrivateInterfaceMethods() { return compareTo(JDK1_9) >= 0; } 225 public static SourceVersion toSourceVersion(Source source) { 226 switch(source) { 227 case JDK1_2: 228 return RELEASE_2; 229 case JDK1_3: 230 return RELEASE_3; 231 case JDK1_4: 232 return RELEASE_4; 233 case JDK1_5: 234 return RELEASE_5; 235 case JDK1_6: 236 return RELEASE_6; 237 case JDK1_7: 238 return RELEASE_7; 239 case JDK1_8: 240 return RELEASE_8; 241 case JDK1_9: 242 return RELEASE_9; 243 default: 244 return null; 245 } 246 } 247} 248