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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.tools.javac.comp;

import java.util.HashMap;

import com.sun.tools.javac.util.Context;

Partial map to record which compiler phases have been executed
 for each compilation unit. Used for ATTR and FLOW phases.
 
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.
/** Partial map to record which compiler phases have been executed
 *  for each compilation unit. Used for ATTR and FLOW phases.
 *
 *  <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 class CompileStates extends HashMap<Env<AttrContext>, CompileStates.CompileState> {
    
The context key for the compile states. /** The context key for the compile states. */
    protected static final Context.Key<CompileStates> compileStatesKey = new Context.Key<>();

    
Get the CompileStates instance for this context. /** Get the CompileStates instance for this context. */
    public static CompileStates instance(Context context) {
        CompileStates instance = context.get(compileStatesKey);
        if (instance == null) {
            instance = new CompileStates(context);
        }
        return instance;
    }

    
Ordered list of compiler phases for each compilation unit. /** Ordered list of compiler phases for each compilation unit. */
    public enum CompileState {
        INIT(0),
        PARSE(1),
        ENTER(2),
        PROCESS(3),
        ATTR(4),
        FLOW(5),
        TRANSTYPES(6),
        TRANSPATTERNS(7),
        UNLAMBDA(8),
        LOWER(9),
        GENERATE(10);

        CompileState(int value) {
            this.value = value;
        }
        public boolean isAfter(CompileState other) {
            return value > other.value;
        }
        public static CompileState max(CompileState a, CompileState b) {
            return a.value > b.value ? a : b;
        }
        private final int value;
    }

    private static final long serialVersionUID = 1812267524140424433L;

    protected transient Context context;

    public CompileStates(Context context) {
        this.context = context;
        context.put(compileStatesKey, this);
    }

    public boolean isDone(Env<AttrContext> env, CompileState cs) {
        CompileState ecs = get(env);
        return (ecs != null) && !cs.isAfter(ecs);
    }
}