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 }