1 /*
2 * Copyright 2002-2006 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package com.sun.tools.javac.code;
27
28 import com.sun.tools.javac.util.*;
29 import com.sun.tools.javac.jvm.Target;
30 import javax.lang.model.SourceVersion;
31 import static javax.lang.model.SourceVersion.*;
32 import java.util.*;
33
34 /** The source language version accepted.
35 *
36 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
37 * you write code that depends on this, you do so at your own risk.
38 * This code and its internal interfaces are subject to change or
39 * deletion without notice.</b>
40 */
41 public enum Source {
42 /** 1.0 had no inner classes, and so could not pass the JCK. */
43 // public static final Source JDK1_0 = new Source("1.0");
44
45 /** 1.1 did not have strictfp, and so could not pass the JCK. */
46 // public static final Source JDK1_1 = new Source("1.1");
47
48 /** 1.2 introduced strictfp. */
49 JDK1_2("1.2"),
50
51 /** 1.3 is the same language as 1.2. */
52 JDK1_3("1.3"),
53
54 /** 1.4 introduced assert. */
55 JDK1_4("1.4"),
56
57 /** 1.5 introduced generics, attributes, foreach, boxing, static import,
58 * covariant return, enums, varargs, et al. */
59 JDK1_5("1.5"),
60
61 /** 1.6 reports encoding problems as errors instead of warnings. */
62 JDK1_6("1.6"),
63
64 /** 1.7 covers the to be determined language features that will be added in JDK 7. */
65 JDK1_7("1.7");
66
67 private static final Context.Key<Source> sourceKey
68 = new Context.Key<Source>();
69
70 public static Source instance(Context context) {
71 Source instance = context.get(sourceKey);
72 if (instance == null) {
73 Options options = Options.instance(context);
74 String sourceString = options.get("-source");
75 if (sourceString != null) instance = lookup(sourceString);
76 if (instance == null) instance = DEFAULT;
77 context.put(sourceKey, instance);
78 }
79 return instance;
80 }
81
82 public final String name;
83
84 private static Map<String,Source> tab = new HashMap<String,Source>();
85 static {
86 for (Source s : values()) {
87 tab.put(s.name, s);
88 }
89 tab.put("5", JDK1_5); // Make 5 an alias for 1.5
90 tab.put("6", JDK1_6); // Make 6 an alias for 1.6
91 tab.put("7", JDK1_7); // Make 7 an alias for 1.7
92 }
93
94 private Source(String name) {
95 this.name = name;
96 }
97
98 public static final Source DEFAULT = JDK1_7;
99
100 public static Source lookup(String name) {
101 return tab.get(name);
102 }
103
104 public Target requiredTarget() {
105 if (this.compareTo(JDK1_7) >= 0) return Target.JDK1_7;
106 if (this.compareTo(JDK1_6) >= 0) return Target.JDK1_6;
107 if (this.compareTo(JDK1_5) >= 0) return Target.JDK1_5;
108 if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4;
109 return Target.JDK1_1;
110 }
111
112 /** Allow encoding errors, giving only warnings. */
113 public boolean allowEncodingErrors() {
114 return compareTo(JDK1_6) < 0;
115 }
116 public boolean allowAsserts() {
117 return compareTo(JDK1_4) >= 0;
118 }
119 public boolean allowCovariantReturns() {
120 return compareTo(JDK1_5) >= 0;
121 }
122 public boolean allowGenerics() {
123 return compareTo(JDK1_5) >= 0;
124 }
125 public boolean allowDiamond() {
126 return compareTo(JDK1_7) >= 0;
127 }
128 public boolean allowEnums() {
129 return compareTo(JDK1_5) >= 0;
130 }
131 public boolean allowForeach() {
132 return compareTo(JDK1_5) >= 0;
133 }
134 public boolean allowStaticImport() {
135 return compareTo(JDK1_5) >= 0;
136 }
137 public boolean allowBoxing() {
138 return compareTo(JDK1_5) >= 0;
139 }
140 public boolean allowVarargs() {
141 return compareTo(JDK1_5) >= 0;
142 }
143 public boolean allowAnnotations() {
144 return compareTo(JDK1_5) >= 0;
145 }
146 // hex floating-point literals supported?
147 public boolean allowHexFloats() {
148 return compareTo(JDK1_5) >= 0;
149 }
150 public boolean allowAnonOuterThis() {
151 return compareTo(JDK1_5) >= 0;
152 }
153 public boolean addBridges() {
154 return compareTo(JDK1_5) >= 0;
155 }
156 public boolean enforceMandatoryWarnings() {
157 return compareTo(JDK1_5) >= 0;
158 }
159 public boolean allowTypeAnnotations() {
160 return compareTo(JDK1_7) >= 0;
161 }
162 public boolean allowBinaryLiterals() {
163 return compareTo(JDK1_7) >= 0;
164 }
165 public boolean allowUnderscoresInLiterals() {
166 return compareTo(JDK1_7) >= 0;
167 }
168 public static SourceVersion toSourceVersion(Source source) {
169 switch(source) {
170 case JDK1_2:
171 return RELEASE_2;
172 case JDK1_3:
173 return RELEASE_3;
174 case JDK1_4:
175 return RELEASE_4;
176 case JDK1_5:
177 return RELEASE_5;
178 case JDK1_6:
179 return RELEASE_6;
180 case JDK1_7:
181 return RELEASE_7;
182 default:
183 return null;
184 }
185 }
186 }