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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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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 =
43         new Context.Key<CompileStates>();
44 
45     /** Get the CompileStates instance for this context. */
instance(Context context)46     public static CompileStates instance(Context context) {
47         CompileStates instance = context.get(compileStatesKey);
48         if (instance == null) {
49             instance = new CompileStates(context);
50         }
51         return instance;
52     }
53 
54     /** Ordered list of compiler phases for each compilation unit. */
55     public enum CompileState {
56         INIT(0),
57         PARSE(1),
58         ENTER(2),
59         PROCESS(3),
60         ATTR(4),
61         FLOW(5),
62         TRANSTYPES(6),
63         UNLAMBDA(7),
64         LOWER(8),
65         GENERATE(9);
66 
CompileState(int value)67         CompileState(int value) {
68             this.value = value;
69         }
isAfter(CompileState other)70         public boolean isAfter(CompileState other) {
71             return value > other.value;
72         }
max(CompileState a, CompileState b)73         public static CompileState max(CompileState a, CompileState b) {
74             return a.value > b.value ? a : b;
75         }
76         private final int value;
77     };
78 
79     private static final long serialVersionUID = 1812267524140424433L;
80 
81     protected Context context;
82 
CompileStates(Context context)83     public CompileStates(Context context) {
84         this.context = context;
85         context.put(compileStatesKey, this);
86     }
87 
isDone(Env<AttrContext> env, CompileState cs)88     public boolean isDone(Env<AttrContext> env, CompileState cs) {
89         CompileState ecs = get(env);
90         return (ecs != null) && !cs.isAfter(ecs);
91     }
92 }
93