1 /*
2 * Copyright (c) 2002, 2011, 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.OptionName.*;
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 covers the to be determined language features that will be added in JDK 7. */
68 JDK1_7("1.7");
69
70 private static final Context.Key<Source> sourceKey
71 = new Context.Key<Source>();
72
73 public static Source instance(Context context) {
74 Source instance = context.get(sourceKey);
75 if (instance == null) {
76 Options options = Options.instance(context);
77 String sourceString = options.get(SOURCE);
78 if (sourceString != null) instance = lookup(sourceString);
79 if (instance == null) instance = DEFAULT;
80 context.put(sourceKey, instance);
81 }
82 return instance;
83 }
84
85 public final String name;
86
87 private static Map<String,Source> tab = new HashMap<String,Source>();
88 static {
89 for (Source s : values()) {
90 tab.put(s.name, s);
91 }
92 tab.put("5", JDK1_5); // Make 5 an alias for 1.5
93 tab.put("6", JDK1_6); // Make 6 an alias for 1.6
94 tab.put("7", JDK1_7); // Make 7 an alias for 1.7
95 }
96
97 private Source(String name) {
98 this.name = name;
99 }
100
101 public static final Source DEFAULT = JDK1_7;
102
103 public static Source lookup(String name) {
104 return tab.get(name);
105 }
106
107 public Target requiredTarget() {
108 if (this.compareTo(JDK1_7) >= 0) return Target.JDK1_7;
109 if (this.compareTo(JDK1_6) >= 0) return Target.JDK1_6;
110 if (this.compareTo(JDK1_5) >= 0) return Target.JDK1_5;
111 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4;
112 return Target.JDK1_1;
113 }
114
115 /** Allow encoding errors, giving only warnings. */
116 public boolean allowEncodingErrors() {
117 return compareTo(JDK1_6) < 0;
118 }
119 public boolean allowAsserts() {
120 return compareTo(JDK1_4) >= 0;
121 }
122 public boolean allowCovariantReturns() {
123 return compareTo(JDK1_5) >= 0;
124 }
125 public boolean allowGenerics() {
126 return compareTo(JDK1_5) >= 0;
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 allowEnums() {
141 return compareTo(JDK1_5) >= 0;
142 }
143 public boolean allowForeach() {
144 return compareTo(JDK1_5) >= 0;
145 }
146 public boolean allowStaticImport() {
147 return compareTo(JDK1_5) >= 0;
148 }
149 public boolean allowBoxing() {
150 return compareTo(JDK1_5) >= 0;
151 }
152 public boolean allowVarargs() {
153 return compareTo(JDK1_5) >= 0;
154 }
155 public boolean allowAnnotations() {
156 return compareTo(JDK1_5) >= 0;
157 }
158 // hex floating-point literals supported?
159 public boolean allowHexFloats() {
160 return compareTo(JDK1_5) >= 0;
161 }
162 public boolean allowAnonOuterThis() {
163 return compareTo(JDK1_5) >= 0;
164 }
165 public boolean addBridges() {
166 return compareTo(JDK1_5) >= 0;
167 }
168 public boolean enforceMandatoryWarnings() {
169 return compareTo(JDK1_5) >= 0;
170 }
171 public boolean allowTryWithResources() {
172 return compareTo(JDK1_7) >= 0;
173 }
174 public boolean allowTypeAnnotations() {
175 return compareTo(JDK1_7) >= 0;
176 }
177 public boolean allowBinaryLiterals() {
178 return compareTo(JDK1_7) >= 0;
179 }
180 public boolean allowUnderscoresInLiterals() {
181 return compareTo(JDK1_7) >= 0;
182 }
183 public boolean allowStringsInSwitch() {
184 return compareTo(JDK1_7) >= 0;
185 }
186 public boolean allowSimplifiedVarargs() {
187 return compareTo(JDK1_7) >= 0;
188 }
189 public static SourceVersion toSourceVersion(Source source) {
190 switch(source) {
191 case JDK1_2:
192 return RELEASE_2;
193 case JDK1_3:
194 return RELEASE_3;
195 case JDK1_4:
196 return RELEASE_4;
197 case JDK1_5:
198 return RELEASE_5;
199 case JDK1_6:
200 return RELEASE_6;
201 case JDK1_7:
202 return RELEASE_7;
203 default:
204 return null;
205 }
206 }
207 }