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 

    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. */

    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 

    67         CompileState(int value) {

    68             this.value = value;

    69         }

    70         public boolean isAfter(CompileState other) {

    71             return value > other.value;

    72         }

    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 

    83     public CompileStates(Context context) {

    84         this.context = context;

    85         context.put(compileStatesKey, this);

    86     }

    87 

    88     public boolean isDone(Env<AttrContext> env, CompileState cs) {

    89         CompileState ecs = get(env);

    90         return (ecs != null) && !cs.isAfter(ecs);

    91     }

    92 }