Source Code Cross Referenced for Source.java in  » 6.0-JDK-Modules-sun » javac-compiler » com » sun » tools » javac » code » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules sun » javac compiler » com.sun.tools.javac.code 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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:        @Version("@(#)Source.java	1.51 07/05/05")
042:        public enum Source {
043:            /** 1.0 had no inner classes, and so could not pass the JCK. */
044:            // public static final Source JDK1_0 =		new Source("1.0");
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:            /** 1.2 introduced strictfp. */
048:            JDK1_2("1.2"),
049:
050:            /** 1.3 is the same language as 1.2. */
051:            JDK1_3("1.3"),
052:
053:            /** 1.4 introduced assert. */
054:            JDK1_4("1.4"),
055:
056:            /** 1.5 introduced generics, attributes, foreach, boxing, static import,
057:             *  covariant return, enums, varargs, et al. */
058:            JDK1_5("1.5"),
059:
060:            /** 1.6 reports encoding problems as errors instead of warnings. */
061:            JDK1_6("1.6"),
062:
063:            /** 1.7 covers the to be determined language features that will be added in JDK 7. */
064:            JDK1_7("1.7");
065:
066:            private static final Context.Key<Source> sourceKey = new Context.Key<Source>();
067:
068:            public static Source instance(Context context) {
069:                Source instance = context.get(sourceKey);
070:                if (instance == null) {
071:                    Options options = Options.instance(context);
072:                    String sourceString = options.get("-source");
073:                    if (sourceString != null)
074:                        instance = lookup(sourceString);
075:                    if (instance == null)
076:                        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)
106:                    return Target.JDK1_7;
107:                if (this .compareTo(JDK1_6) >= 0)
108:                    return Target.JDK1_6;
109:                if (this .compareTo(JDK1_5) >= 0)
110:                    return Target.JDK1_5;
111:                if (this .compareTo(JDK1_4) >= 0)
112:                    return Target.JDK1_4;
113:                return Target.JDK1_1;
114:            }
115:
116:            /** Allow encoding errors, giving only warnings. */
117:            public boolean allowEncodingErrors() {
118:                return compareTo(JDK1_6) < 0;
119:            }
120:
121:            public boolean allowAsserts() {
122:                return compareTo(JDK1_4) >= 0;
123:            }
124:
125:            public boolean allowCovariantReturns() {
126:                return compareTo(JDK1_5) >= 0;
127:            }
128:
129:            public boolean allowGenerics() {
130:                return compareTo(JDK1_5) >= 0;
131:            }
132:
133:            public boolean allowEnums() {
134:                return compareTo(JDK1_5) >= 0;
135:            }
136:
137:            public boolean allowForeach() {
138:                return compareTo(JDK1_5) >= 0;
139:            }
140:
141:            public boolean allowStaticImport() {
142:                return compareTo(JDK1_5) >= 0;
143:            }
144:
145:            public boolean allowBoxing() {
146:                return compareTo(JDK1_5) >= 0;
147:            }
148:
149:            public boolean allowVarargs() {
150:                return compareTo(JDK1_5) >= 0;
151:            }
152:
153:            public boolean allowAnnotations() {
154:                return compareTo(JDK1_5) >= 0;
155:            }
156:
157:            // hex floating-point literals supported?
158:            public boolean allowHexFloats() {
159:                return compareTo(JDK1_5) >= 0;
160:            }
161:
162:            public boolean allowAnonOuterThis() {
163:                return compareTo(JDK1_5) >= 0;
164:            }
165:
166:            public boolean addBridges() {
167:                return compareTo(JDK1_5) >= 0;
168:            }
169:
170:            public boolean enforceMandatoryWarnings() {
171:                return compareTo(JDK1_5) >= 0;
172:            }
173:
174:            public static SourceVersion toSourceVersion(Source source) {
175:                switch (source) {
176:                case JDK1_2:
177:                    return RELEASE_2;
178:                case JDK1_3:
179:                    return RELEASE_3;
180:                case JDK1_4:
181:                    return RELEASE_4;
182:                case JDK1_5:
183:                    return RELEASE_5;
184:                case JDK1_6:
185:                    return RELEASE_6;
186:                case JDK1_7:
187:                    return RELEASE_7;
188:                default:
189:                    return null;
190:                }
191:            }
192:        }
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