1 /*
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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
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
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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
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24  */
25 
26 package com.sun.tools.javac.comp;
27 
28 import java.util.HashMap;
29 
30 import com.sun.tools.javac.util.Context;
31 
32 /** Partial map to record which compiler phases have been executed
33  *  for each compilation unit. Used for ATTR and FLOW phases.
34  *
35  *  <p><b>This is NOT part of any supported API.
36  *  If you write code that depends on this, you do so at your own risk.
37  *  This code and its internal interfaces are subject to change or
38  *  deletion without notice.</b>
39  */
40 public class CompileStates extends HashMap<Env<AttrContext>, CompileStates.CompileState> {
41     /** The context key for the compile states. */
42     protected static final Context.Key<CompileStates> compileStatesKey = new Context.Key<>();
43 
44     /** Get the CompileStates instance for this context. */
instance(Context context)45     public static CompileStates instance(Context context) {
46         CompileStates instance = context.get(compileStatesKey);
47         if (instance == null) {
48             instance = new CompileStates(context);
49         }
50         return instance;
51     }
52 
53     /** Ordered list of compiler phases for each compilation unit. */
54     public enum CompileState {
55         INIT(0),
56         PARSE(1),
57         ENTER(2),
58         PROCESS(3),
59         ATTR(4),
60         FLOW(5),
61         TRANSTYPES(6),
62         UNLAMBDA(7),
63         LOWER(8),
64         GENERATE(9);
65 
CompileState(int value)66         CompileState(int value) {
67             this.value = value;
68         }
isAfter(CompileState other)69         public boolean isAfter(CompileState other) {
70             return value > other.value;
71         }
max(CompileState a, CompileState b)72         public static CompileState max(CompileState a, CompileState b) {
73             return a.value > b.value ? a : b;
74         }
75         private final int value;
76     }
77 
78     private static final long serialVersionUID = 1812267524140424433L;
79 
80     protected Context context;
81 
CompileStates(Context context)82     public CompileStates(Context context) {
83         this.context = context;
84         context.put(compileStatesKey, this);
85     }
86 
isDone(Env<AttrContext> env, CompileState cs)87     public boolean isDone(Env<AttrContext> env, CompileState cs) {
88         CompileState ecs = get(env);
89         return (ecs != null) && !cs.isAfter(ecs);
90     }
91 }
92