1 /*
2 * Copyright (c) 2002, 2013, 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
77 = new Context.Key<Source>();
78
79 public static Source instance(Context context) {
80 Source instance = context.get(sourceKey);
81 if (instance == null) {
82 Options options = Options.instance(context);
83 String sourceString = options.get(SOURCE);
84 if (sourceString != null) instance = lookup(sourceString);
85 if (instance == null) instance = DEFAULT;
86 context.put(sourceKey, instance);
87 }
88 return instance;
89 }
90
91 public final String name;
92
93 private static final Map<String,Source> tab = new HashMap<>();
94 static {
95 for (Source s : values()) {
96 tab.put(s.name, s);
97 }
98 tab.put("5", JDK1_5); // Make 5 an alias for 1.5
99 tab.put("6", JDK1_6); // Make 6 an alias for 1.6
100 tab.put("7", JDK1_7); // Make 7 an alias for 1.7
101 tab.put("8", JDK1_8); // Make 8 an alias for 1.8
102 tab.put("9", JDK1_9); // Make 9 an alias for 1.9
103 }
104
105 private Source(String name) {
106 this.name = name;
107 }
108
109 public static final Source DEFAULT = JDK1_9;
110
111 public static Source lookup(String name) {
112 return tab.get(name);
113 }
114
115 public Target requiredTarget() {
116 if (this.compareTo(JDK1_9) >= 0) return Target.JDK1_9;
117 if (this.compareTo(JDK1_8) >= 0) return Target.JDK1_8;
118 if (this.compareTo(JDK1_7) >= 0) return Target.JDK1_7;
119 if (this.compareTo(JDK1_6) >= 0) return Target.JDK1_6;
120 if (this.compareTo(JDK1_5) >= 0) return Target.JDK1_5;
121 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4;
122 return Target.JDK1_1;
123 }
124
125 /** Allow encoding errors, giving only warnings. */
126 public boolean allowEncodingErrors() {
127 return compareTo(JDK1_6) < 0;
128 }
129 public boolean allowAsserts() {
130 return compareTo(JDK1_4) >= 0;
131 }
132 public boolean allowCovariantReturns() {
133 return compareTo(JDK1_5) >= 0;
134 }
135 public boolean allowGenerics() {
136 return compareTo(JDK1_5) >= 0;
137 }
138 public boolean allowDiamond() {
139 return compareTo(JDK1_7) >= 0;
140 }
141 public boolean allowMulticatch() {
142 return compareTo(JDK1_7) >= 0;
143 }
144 public boolean allowImprovedRethrowAnalysis() {
145 return compareTo(JDK1_7) >= 0;
146 }
147 public boolean allowImprovedCatchAnalysis() {
148 return compareTo(JDK1_7) >= 0;
149 }
150 public boolean allowEnums() {
151 return compareTo(JDK1_5) >= 0;
152 }
153 public boolean allowForeach() {
154 return compareTo(JDK1_5) >= 0;
155 }
156 public boolean allowStaticImport() {
157 return compareTo(JDK1_5) >= 0;
158 }
159 public boolean allowBoxing() {
160 return compareTo(JDK1_5) >= 0;
161 }
162 public boolean allowVarargs() {
163 return compareTo(JDK1_5) >= 0;
164 }
165 public boolean allowAnnotations() {
166 return compareTo(JDK1_5) >= 0;
167 }
168 // hex floating-point literals supported?
169 public boolean allowHexFloats() {
170 return compareTo(JDK1_5) >= 0;
171 }
172 public boolean allowAnonOuterThis() {
173 return compareTo(JDK1_5) >= 0;
174 }
175 public boolean addBridges() {
176 return compareTo(JDK1_5) >= 0;
177 }
178 public boolean enforceMandatoryWarnings() {
179 return compareTo(JDK1_5) >= 0;
180 }
181 public boolean allowTryWithResources() {
182 return compareTo(JDK1_7) >= 0;
183 }
184 public boolean allowBinaryLiterals() {
185 return compareTo(JDK1_7) >= 0;
186 }
187 public boolean allowUnderscoresInLiterals() {
188 return compareTo(JDK1_7) >= 0;
189 }
190 public boolean allowStringsInSwitch() {
191 return compareTo(JDK1_7) >= 0;
192 }
193 public boolean allowSimplifiedVarargs() {
194 return compareTo(JDK1_7) >= 0;
195 }
196 public boolean allowObjectToPrimitiveCast() {
197 return compareTo(JDK1_7) >= 0;
198 }
199 public boolean allowPoly() {
200 return compareTo(JDK1_8) >= 0;
201 }
202 public boolean allowLambda() {
203 return compareTo(JDK1_8) >= 0;
204 }
205 public boolean allowMethodReferences() {
206 return compareTo(JDK1_8) >= 0;
207 }
208 public boolean allowDefaultMethods() {
209 return compareTo(JDK1_8) >= 0;
210 }
211 public boolean allowStaticInterfaceMethods() {
212 return compareTo(JDK1_8) >= 0;
213 }
214 public boolean allowStrictMethodClashCheck() {
215 return compareTo(JDK1_8) >= 0;
216 }
217 public boolean allowEffectivelyFinalInInnerClasses() {
218 return compareTo(JDK1_8) >= 0;
219 }
220 public boolean allowTypeAnnotations() {
221 return compareTo(JDK1_8) >= 0;
222 }
223 public boolean allowRepeatedAnnotations() {
224 return compareTo(JDK1_8) >= 0;
225 }
226 public boolean allowIntersectionTypesInCast() {
227 return compareTo(JDK1_8) >= 0;
228 }
229 public boolean allowGraphInference() {
230 return compareTo(JDK1_8) >= 0;
231 }
232 public boolean allowStructuralMostSpecific() {
233 return compareTo(JDK1_8) >= 0;
234 }
235 public static SourceVersion toSourceVersion(Source source) {
236 switch(source) {
237 case JDK1_2:
238 return RELEASE_2;
239 case JDK1_3:
240 return RELEASE_3;
241 case JDK1_4:
242 return RELEASE_4;
243 case JDK1_5:
244 return RELEASE_5;
245 case JDK1_6:
246 return RELEASE_6;
247 case JDK1_7:
248 return RELEASE_7;
249 case JDK1_8:
250 return RELEASE_8;
251 case JDK1_9:
252 return RELEASE_8; // Adjust once RELEASE_9 exists
253 default:
254 return null;
255 }
256 }
257 }