001 /*
002 * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package com.sun.tools.javac.code;
027
028 import com.sun.tools.javac.util.*;
029 import com.sun.tools.javac.jvm.Target;
030 import javax.lang.model.SourceVersion;
031 import static javax.lang.model.SourceVersion.*;
032 import java.util.*;
033
034 /** The source language version accepted.
035 *
036 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
037 * you write code that depends on this, you do so at your own risk.
038 * This code and its internal interfaces are subject to change or
039 * deletion without notice.</b>
040 */
041 public enum Source {
042 /** 1.0 had no inner classes, and so could not pass the JCK. */
043 // public static final Source JDK1_0 = new Source("1.0");
044
045 /** 1.1 did not have strictfp, and so could not pass the JCK. */
046 // public static final Source JDK1_1 = new Source("1.1");
047
048 /** 1.2 introduced strictfp. */
049 JDK1_2("1.2"),
050
051 /** 1.3 is the same language as 1.2. */
052 JDK1_3("1.3"),
053
054 /** 1.4 introduced assert. */
055 JDK1_4("1.4"),
056
057 /** 1.5 introduced generics, attributes, foreach, boxing, static import,
058 * covariant return, enums, varargs, et al. */
059 JDK1_5("1.5"),
060
061 /** 1.6 reports encoding problems as errors instead of warnings. */
062 JDK1_6("1.6"),
063
064 /** 1.7 covers the to be determined language features that will be added in JDK 7. */
065 JDK1_7("1.7");
066
067 private static final Context.Key<Source> sourceKey
068 = new Context.Key<Source>();
069
070 public static Source instance(Context context) {
071 Source instance = context.get(sourceKey);
072 if (instance == null) {
073 Options options = Options.instance(context);
074 String sourceString = options.get("-source");
075 if (sourceString != null) instance = lookup(sourceString);
076 if (instance == null) instance = DEFAULT;
077 context.put(sourceKey, instance);
078 }
079 return instance;
080 }
081
082 public final String name;
083
084 private static Map<String,Source> tab = new HashMap<String,Source>();
085 static {
086 for (Source s : values()) {
087 tab.put(s.name, s);
088 }
089 tab.put("5", JDK1_5); // Make 5 an alias for 1.5
090 tab.put("6", JDK1_6); // Make 6 an alias for 1.6
091 tab.put("7", JDK1_7); // Make 7 an alias for 1.7
092 }
093
094 private Source(String name) {
095 this.name = name;
096 }
097
098 public static final Source DEFAULT = JDK1_5;
099
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 allowEnums() {
126 return compareTo(JDK1_5) >= 0;
127 }
128 public boolean allowForeach() {
129 return compareTo(JDK1_5) >= 0;
130 }
131 public boolean allowStaticImport() {
132 return compareTo(JDK1_5) >= 0;
133 }
134 public boolean allowBoxing() {
135 return compareTo(JDK1_5) >= 0;
136 }
137 public boolean allowVarargs() {
138 return compareTo(JDK1_5) >= 0;
139 }
140 public boolean allowAnnotations() {
141 return compareTo(JDK1_5) >= 0;
142 }
143 // hex floating-point literals supported?
144 public boolean allowHexFloats() {
145 return compareTo(JDK1_5) >= 0;
146 }
147 public boolean allowAnonOuterThis() {
148 return compareTo(JDK1_5) >= 0;
149 }
150 public boolean addBridges() {
151 return compareTo(JDK1_5) >= 0;
152 }
153 public boolean enforceMandatoryWarnings() {
154 return compareTo(JDK1_5) >= 0;
155 }
156 public static SourceVersion toSourceVersion(Source source) {
157 switch(source) {
158 case JDK1_2:
159 return RELEASE_2;
160 case JDK1_3:
161 return RELEASE_3;
162 case JDK1_4:
163 return RELEASE_4;
164 case JDK1_5:
165 return RELEASE_5;
166 case JDK1_6:
167 return RELEASE_6;
168 case JDK1_7:
169 return RELEASE_7;
170 default:
171 return null;
172 }
173 }
174 }