1 /*
2  * Copyright (c) 2002, 2014, 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 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 
instance(Context context)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 final Map<String,Source> tab = new HashMap<String,Source>();
91     static {
92         for (Source s : values()) {
tab.put(s.name, s)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 
Source(String name)101     private Source(String name) {
102         this.name = name;
103     }
104 
105     public static final Source DEFAULT = JDK1_8;
106 
lookup(String name)107     public static Source lookup(String name) {
108         return tab.get(name);
109     }
110 
requiredTarget()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. */
allowEncodingErrors()121     public boolean allowEncodingErrors() {
122         return compareTo(JDK1_6) < 0;
123     }
allowAsserts()124     public boolean allowAsserts() {
125         return compareTo(JDK1_4) >= 0;
126     }
allowCovariantReturns()127     public boolean allowCovariantReturns() {
128         return compareTo(JDK1_5) >= 0;
129     }
allowGenerics()130     public boolean allowGenerics() {
131         return compareTo(JDK1_5) >= 0;
132     }
allowDiamond()133     public boolean allowDiamond() {
134         return compareTo(JDK1_7) >= 0;
135     }
allowMulticatch()136     public boolean allowMulticatch() {
137         return compareTo(JDK1_7) >= 0;
138     }
allowImprovedRethrowAnalysis()139     public boolean allowImprovedRethrowAnalysis() {
140         return compareTo(JDK1_7) >= 0;
141     }
allowImprovedCatchAnalysis()142     public boolean allowImprovedCatchAnalysis() {
143         return compareTo(JDK1_7) >= 0;
144     }
allowEnums()145     public boolean allowEnums() {
146         return compareTo(JDK1_5) >= 0;
147     }
allowForeach()148     public boolean allowForeach() {
149         return compareTo(JDK1_5) >= 0;
150     }
allowStaticImport()151     public boolean allowStaticImport() {
152         return compareTo(JDK1_5) >= 0;
153     }
allowBoxing()154     public boolean allowBoxing() {
155         return compareTo(JDK1_5) >= 0;
156     }
allowVarargs()157     public boolean allowVarargs() {
158         return compareTo(JDK1_5) >= 0;
159     }
allowAnnotations()160     public boolean allowAnnotations() {
161         return compareTo(JDK1_5) >= 0;
162     }
163     // hex floating-point literals supported?
allowHexFloats()164     public boolean allowHexFloats() {
165         return compareTo(JDK1_5) >= 0;
166     }
allowAnonOuterThis()167     public boolean allowAnonOuterThis() {
168         return compareTo(JDK1_5) >= 0;
169     }
addBridges()170     public boolean addBridges() {
171         return compareTo(JDK1_5) >= 0;
172     }
enforceMandatoryWarnings()173     public boolean enforceMandatoryWarnings() {
174         return compareTo(JDK1_5) >= 0;
175     }
allowTryWithResources()176     public boolean allowTryWithResources() {
177         return compareTo(JDK1_7) >= 0;
178     }
allowBinaryLiterals()179     public boolean allowBinaryLiterals() {
180         return compareTo(JDK1_7) >= 0;
181     }
allowUnderscoresInLiterals()182     public boolean allowUnderscoresInLiterals() {
183         return compareTo(JDK1_7) >= 0;
184     }
allowStringsInSwitch()185     public boolean allowStringsInSwitch() {
186         return compareTo(JDK1_7) >= 0;
187     }
allowSimplifiedVarargs()188     public boolean allowSimplifiedVarargs() {
189         return compareTo(JDK1_7) >= 0;
190     }
allowObjectToPrimitiveCast()191     public boolean allowObjectToPrimitiveCast() {
192         return compareTo(JDK1_7) >= 0;
193     }
enforceThisDotInit()194     public boolean enforceThisDotInit() {
195         return compareTo(JDK1_7) >= 0;
196     }
allowPoly()197     public boolean allowPoly() {
198         return compareTo(JDK1_8) >= 0;
199     }
allowLambda()200     public boolean allowLambda() {
201         return compareTo(JDK1_8) >= 0;
202     }
allowMethodReferences()203     public boolean allowMethodReferences() {
204         return compareTo(JDK1_8) >= 0;
205     }
allowDefaultMethods()206     public boolean allowDefaultMethods() {
207         return compareTo(JDK1_8) >= 0;
208     }
allowStaticInterfaceMethods()209     public boolean allowStaticInterfaceMethods() {
210         return compareTo(JDK1_8) >= 0;
211     }
allowStrictMethodClashCheck()212     public boolean allowStrictMethodClashCheck() {
213         return compareTo(JDK1_8) >= 0;
214     }
allowEffectivelyFinalInInnerClasses()215     public boolean allowEffectivelyFinalInInnerClasses() {
216         return compareTo(JDK1_8) >= 0;
217     }
allowTypeAnnotations()218     public boolean allowTypeAnnotations() {
219         return compareTo(JDK1_8) >= 0;
220     }
allowAnnotationsAfterTypeParams()221     public boolean allowAnnotationsAfterTypeParams() {
222         return compareTo(JDK1_8) >= 0;
223     }
allowRepeatedAnnotations()224     public boolean allowRepeatedAnnotations() {
225         return compareTo(JDK1_8) >= 0;
226     }
allowIntersectionTypesInCast()227     public boolean allowIntersectionTypesInCast() {
228         return compareTo(JDK1_8) >= 0;
229     }
allowGraphInference()230     public boolean allowGraphInference() {
231         return compareTo(JDK1_8) >= 0;
232     }
allowFunctionalInterfaceMostSpecific()233     public boolean allowFunctionalInterfaceMostSpecific() {
234         return compareTo(JDK1_8) >= 0;
235     }
allowPostApplicabilityVarargsAccessCheck()236     public boolean allowPostApplicabilityVarargsAccessCheck() {
237         return compareTo(JDK1_8) >= 0;
238     }
toSourceVersion(Source source)239     public static SourceVersion toSourceVersion(Source source) {
240         switch(source) {
241         case JDK1_2:
242             return RELEASE_2;
243         case JDK1_3:
244             return RELEASE_3;
245         case JDK1_4:
246             return RELEASE_4;
247         case JDK1_5:
248             return RELEASE_5;
249         case JDK1_6:
250             return RELEASE_6;
251         case JDK1_7:
252             return RELEASE_7;
253         case JDK1_8:
254             return RELEASE_8;
255         default:
256             return null;
257         }
258     }
259 }
260