/*
 * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.tools.javac.code;

import java.util.*;

import javax.lang.model.SourceVersion;
import static javax.lang.model.SourceVersion.*;

import com.sun.tools.javac.jvm.Target;
import com.sun.tools.javac.util.*;
import static com.sun.tools.javac.main.Option.*;

The source language version accepted.
 
This is NOT part of any supported API.
 If you write code that depends on this, you do so at your own risk.
 This code and its internal interfaces are subject to change or
 deletion without notice.
/** The source language version accepted.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 */
public enum Source {
    /** 1.0 had no inner classes, and so could not pass the JCK. */
    // public static final Source JDK1_0 =              new Source("1.0");

    /** 1.1 did not have strictfp, and so could not pass the JCK. */
    // public static final Source JDK1_1 =              new Source("1.1");

    
1.2 introduced strictfp. /** 1.2 introduced strictfp. */
    JDK1_2("1.2"),

    
1.3 is the same language as 1.2. /** 1.3 is the same language as 1.2. */
    JDK1_3("1.3"),

    
1.4 introduced assert. /** 1.4 introduced assert. */
    JDK1_4("1.4"),

    
1.5 introduced generics, attributes, foreach, boxing, static import,
 covariant return, enums, varargs, et al. /** 1.5 introduced generics, attributes, foreach, boxing, static import,
     *  covariant return, enums, varargs, et al. */
    JDK1_5("1.5"),

    
1.6 reports encoding problems as errors instead of warnings. /** 1.6 reports encoding problems as errors instead of warnings. */
    JDK1_6("1.6"),

    
1.7 introduced try-with-resources, multi-catch, string switch, etc. /** 1.7 introduced try-with-resources, multi-catch, string switch, etc. */
    JDK1_7("1.7"),

    
1.8 lambda expressions and default methods. /** 1.8 lambda expressions and default methods. */
    JDK1_8("1.8"),

    
1.9 covers the to be determined language features that will be added in JDK 9. /** 1.9 covers the to be determined language features that will be added in JDK 9. */
    JDK1_9("1.9");

    private static final Context.Key<Source> sourceKey = new Context.Key<>();

    public static Source instance(Context context) {
        Source instance = context.get(sourceKey);
        if (instance == null) {
            Options options = Options.instance(context);
            String sourceString = options.get(SOURCE);
            if (sourceString != null) instance = lookup(sourceString);
            if (instance == null) instance = DEFAULT;
            context.put(sourceKey, instance);
        }
        return instance;
    }

    public final String name;

    private static final Map<String,Source> tab = new HashMap<>();
    static {
        for (Source s : values()) {
            tab.put(s.name, s);
        }
        tab.put("5", JDK1_5); // Make 5 an alias for 1.5
        tab.put("6", JDK1_6); // Make 6 an alias for 1.6
        tab.put("7", JDK1_7); // Make 7 an alias for 1.7
        tab.put("8", JDK1_8); // Make 8 an alias for 1.8
        tab.put("9", JDK1_9); // Make 9 an alias for 1.9
    }

    private Source(String name) {
        this.name = name;
    }

    public static final Source MIN = Source.JDK1_6;

    private static final Source MAX = values()[values().length - 1];

    public static final Source DEFAULT = MAX;

    public static Source lookup(String name) {
        return tab.get(name);
    }

    public Target requiredTarget() {
        if (this.compareTo(JDK1_9) >= 0) return Target.JDK1_9;
        if (this.compareTo(JDK1_8) >= 0) return Target.JDK1_8;
        if (this.compareTo(JDK1_7) >= 0) return Target.JDK1_7;
        if (this.compareTo(JDK1_6) >= 0) return Target.JDK1_6;
        if (this.compareTo(JDK1_5) >= 0) return Target.JDK1_5;
        if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4;
        return Target.JDK1_1;
    }

    public boolean allowDiamond() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowMulticatch() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowImprovedRethrowAnalysis() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowImprovedCatchAnalysis() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowModules() {
        return compareTo(JDK1_9) >= 0;
    }
    public boolean allowTryWithResources() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowEffectivelyFinalVariablesInTryWithResources() {
        return compareTo(JDK1_9) >= 0;
    }
    public boolean allowBinaryLiterals() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowUnderscoresInLiterals() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowStringsInSwitch() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowDeprecationOnImport() {
        return compareTo(JDK1_9) < 0;
    }
    public boolean allowSimplifiedVarargs() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowObjectToPrimitiveCast() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean enforceThisDotInit() {
        return compareTo(JDK1_7) >= 0;
    }
    public boolean allowPoly() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowLambda() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowMethodReferences() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowDefaultMethods() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowStaticInterfaceMethods() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowStrictMethodClashCheck() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowEffectivelyFinalInInnerClasses() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowTypeAnnotations() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowAnnotationsAfterTypeParams() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowRepeatedAnnotations() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowIntersectionTypesInCast() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowGraphInference() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowFunctionalInterfaceMostSpecific() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean allowPostApplicabilityVarargsAccessCheck() {
        return compareTo(JDK1_8) >= 0;
    }
    public boolean mapCapturesToBounds() {
        return compareTo(JDK1_8) < 0;
    }
    public boolean allowPrivateSafeVarargs() {
        return compareTo(JDK1_9) >= 0;
    }
    public boolean allowDiamondWithAnonymousClassCreation() {
        return compareTo(JDK1_9) >= 0;
    }
    public boolean allowUnderscoreIdentifier() {
        return compareTo(JDK1_8) <= 0;
    }
    public boolean allowPrivateInterfaceMethods() { return compareTo(JDK1_9) >= 0; }
    public static SourceVersion toSourceVersion(Source source) {
        switch(source) {
        case JDK1_2:
            return RELEASE_2;
        case JDK1_3:
            return RELEASE_3;
        case JDK1_4:
            return RELEASE_4;
        case JDK1_5:
            return RELEASE_5;
        case JDK1_6:
            return RELEASE_6;
        case JDK1_7:
            return RELEASE_7;
        case JDK1_8:
            return RELEASE_8;
        case JDK1_9:
            return RELEASE_9;
        default:
            return null;
        }
    }
}