1 /*
2 * Copyright (c) 2002, 2012, 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 import javax.lang.model.SourceVersion;
30 import static javax.lang.model.SourceVersion.*;
31
32 import com.sun.tools.javac.util.*;
33 import com.sun.tools.javac.jvm.Target;
34
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 covers the to be determined language features that will be added in JDK 8. */
71 JDK1_8("1.8");
72
73 private static final Context.Key<Source> sourceKey
74 = new Context.Key<Source>();
75
76 public static Source instance(Context context) {
77 Source instance = context.get(sourceKey);
78 if (instance == null) {
79 Options options = Options.instance(context);
80 String sourceString = options.get(SOURCE);
81 if (sourceString != null) instance = lookup(sourceString);
82 if (instance == null) instance = DEFAULT;
83 context.put(sourceKey, instance);
84 }
85 return instance;
86 }
87
88 public final String name;
89
90 private static Map<String,Source> tab = new HashMap<String,Source>();
91 static {
92 for (Source s : values()) {
93 tab.put(s.name, s);
94 }
95 tab.put("5", JDK1_5); // Make 5 an alias for 1.5
96 tab.put("6", JDK1_6); // Make 6 an alias for 1.6
97 tab.put("7", JDK1_7); // Make 7 an alias for 1.7
98 tab.put("8", JDK1_8); // Make 8 an alias for 1.8
99 }
100
101 private Source(String name) {
102 this.name = name;
103 }
104
105 public static final Source DEFAULT = JDK1_8;
106
107 public static Source lookup(String name) {
108 return tab.get(name);
109 }
110
111 public Target requiredTarget() {
112 if (this.compareTo(JDK1_8) >= 0) return Target.JDK1_8;
113 if (this.compareTo(JDK1_7) >= 0) return Target.JDK1_7;
114 if (this.compareTo(JDK1_6) >= 0) return Target.JDK1_6;
115 if (this.compareTo(JDK1_5) >= 0) return Target.JDK1_5;
116 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4;
117 return Target.JDK1_1;
118 }
119
120 /** Allow encoding errors, giving only warnings. */
121 public boolean allowEncodingErrors() {
122 return compareTo(JDK1_6) < 0;
123 }
124 public boolean allowAsserts() {
125 return compareTo(JDK1_4) >= 0;
126 }
127 public boolean allowCovariantReturns() {
128 return compareTo(JDK1_5) >= 0;
129 }
130 public boolean allowGenerics() {
131 return compareTo(JDK1_5) >= 0;
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 allowEnums() {
146 return compareTo(JDK1_5) >= 0;
147 }
148 public boolean allowForeach() {
149 return compareTo(JDK1_5) >= 0;
150 }
151 public boolean allowStaticImport() {
152 return compareTo(JDK1_5) >= 0;
153 }
154 public boolean allowBoxing() {
155 return compareTo(JDK1_5) >= 0;
156 }
157 public boolean allowVarargs() {
158 return compareTo(JDK1_5) >= 0;
159 }
160 public boolean allowAnnotations() {
161 return compareTo(JDK1_5) >= 0;
162 }
163 // hex floating-point literals supported?
164 public boolean allowHexFloats() {
165 return compareTo(JDK1_5) >= 0;
166 }
167 public boolean allowAnonOuterThis() {
168 return compareTo(JDK1_5) >= 0;
169 }
170 public boolean addBridges() {
171 return compareTo(JDK1_5) >= 0;
172 }
173 public boolean enforceMandatoryWarnings() {
174 return compareTo(JDK1_5) >= 0;
175 }
176 public boolean allowTryWithResources() {
177 return compareTo(JDK1_7) >= 0;
178 }
179 public boolean allowTypeAnnotations() {
180 return compareTo(JDK1_7) >= 0;
181 }
182 public boolean allowBinaryLiterals() {
183 return compareTo(JDK1_7) >= 0;
184 }
185 public boolean allowUnderscoresInLiterals() {
186 return compareTo(JDK1_7) >= 0;
187 }
188 public boolean allowStringsInSwitch() {
189 return compareTo(JDK1_7) >= 0;
190 }
191 public boolean allowSimplifiedVarargs() {
192 return compareTo(JDK1_7) >= 0;
193 }
194 public boolean allowObjectToPrimitiveCast() {
195 return compareTo(JDK1_7) >= 0;
196 }
197 public boolean allowLambda() {
198 return compareTo(JDK1_8) >= 0;
199 }
200 public boolean allowMethodReferences() {
201 return compareTo(JDK1_8) >= 0;
202 }
203 public boolean allowRepeatedAnnotations() {
204 return compareTo(JDK1_8) >= 0;
205 }
206 public static SourceVersion toSourceVersion(Source source) {
207 switch(source) {
208 case JDK1_2:
209 return RELEASE_2;
210 case JDK1_3:
211 return RELEASE_3;
212 case JDK1_4:
213 return RELEASE_4;
214 case JDK1_5:
215 return RELEASE_5;
216 case JDK1_6:
217 return RELEASE_6;
218 case JDK1_7:
219 return RELEASE_7;
220 case JDK1_8:
221 return RELEASE_8;
222 default:
223 return null;
224 }
225 }
226 }