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 }