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
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 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 }