1/*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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
6 * under the terms of the GNU General Public License version 2 only, as
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.
10 *
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
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.tools.javac.comp;
27
28import java.util.HashMap;
29
30import 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 */
40public 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. */
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
66        CompileState(int value) {
67            this.value = value;
68        }
69        public boolean isAfter(CompileState other) {
70            return value > other.value;
71        }
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
82    public CompileStates(Context context) {
83        this.context = context;
84        context.put(compileStatesKey, this);
85    }
86
87    public boolean isDone(Env<AttrContext> env, CompileState cs) {
88        CompileState ecs = get(env);
89        return (ecs != null) && !cs.isAfter(ecs);
90    }
91}
92