jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/code/TypeAnnotationPosition.java@4868a36f6fd8

     1 /*

     2  * Copyright (c) 2003, 2010, 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  */

    26 package com.sun.tools.javac.code;

    28 import com.sun.tools.javac.util.*;

    30 /** A type annotation position.

    31 *

    32 *  <p><b>This is NOT part of any supported API.

    33 *  If you write code that depends on this, you do so at your own risk.

    34 *  This code and its internal interfaces are subject to change or

    35 *  deletion without notice.</b>

    36 */

    37 public class TypeAnnotationPosition {

    39     public TargetType type = TargetType.UNKNOWN;

    41     // For generic/array types.

    42     public List<Integer> location = List.nil();

    44     // Tree position.

    45     public int pos = -1;

    47     // For typecasts, type tests, new (and locals, as start_pc).

    48     public boolean isValidOffset = false;

    49     public int offset = -1;

    51     // For locals. arrays same length

    52     public int[] lvarOffset = null;

    53     public int[] lvarLength = null;

    54     public int[] lvarIndex = null;

    56     // For type parameter bound

    57     public int bound_index = Integer.MIN_VALUE;

    59     // For type parameter and method parameter

    60     public int parameter_index = Integer.MIN_VALUE;

    62     // For class extends, implements, and throws classes

    63     public int type_index = Integer.MIN_VALUE;

    65     // For wildcards

    66     public TypeAnnotationPosition wildcard_position = null;

    68     @Override

    69     public String toString() {

    70         StringBuilder sb = new StringBuilder();

    71         sb.append('[');

    72         sb.append(type);

    74         switch (type) {

    75         // type case

    76         case TYPECAST:

    77         case TYPECAST_GENERIC_OR_ARRAY:

    78             // object creation

    79         case INSTANCEOF:

    80         case INSTANCEOF_GENERIC_OR_ARRAY:

    81             // new expression

    82         case NEW:

    83         case NEW_GENERIC_OR_ARRAY:

    84         case NEW_TYPE_ARGUMENT:

    85         case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY:

    86             sb.append(", offset = ");

    87             sb.append(offset);

    88             break;

    89             // local variable

    90         case LOCAL_VARIABLE:

    91         case LOCAL_VARIABLE_GENERIC_OR_ARRAY:

    92             sb.append(", {");

    93             for (int i = 0; i < lvarOffset.length; ++i) {

    94                 if (i != 0) sb.append("; ");

    95                 sb.append(", start_pc = ");

    96                 sb.append(lvarOffset[i]);

    97                 sb.append(", length = ");

    98                 sb.append(lvarLength[i]);

    99                 sb.append(", index = ");

   100                 sb.append(lvarIndex[i]);

   101             }

   102             sb.append("}");

   103             break;

   104             // method receiver

   105         case METHOD_RECEIVER:

   106             // Do nothing

   107             break;

   108             // type parameters

   109         case CLASS_TYPE_PARAMETER:

   110         case METHOD_TYPE_PARAMETER:

   111             sb.append(", param_index = ");

   112             sb.append(parameter_index);

   113             break;

   114             // type parameters bound

   115         case CLASS_TYPE_PARAMETER_BOUND:

   116         case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:

   117         case METHOD_TYPE_PARAMETER_BOUND:

   118         case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:

   119             sb.append(", param_index = ");

   120             sb.append(parameter_index);

   121             sb.append(", bound_index = ");

   122             sb.append(bound_index);

   123             break;

   124             // wildcard

   125         case WILDCARD_BOUND:

   126         case WILDCARD_BOUND_GENERIC_OR_ARRAY:

   127             sb.append(", wild_card = ");

   128             sb.append(wildcard_position);

   129             break;

   130             // Class extends and implements clauses

   131         case CLASS_EXTENDS:

   132         case CLASS_EXTENDS_GENERIC_OR_ARRAY:

   133             sb.append(", type_index = ");

   134             sb.append(type_index);

   135             break;

   136             // throws

   137         case THROWS:

   138             sb.append(", type_index = ");

   139             sb.append(type_index);

   140             break;

   141         case CLASS_LITERAL:

   142         case CLASS_LITERAL_GENERIC_OR_ARRAY:

   143             sb.append(", offset = ");

   144             sb.append(offset);

   145             break;

   146             // method parameter: not specified

   147         case METHOD_PARAMETER_GENERIC_OR_ARRAY:

   148             sb.append(", param_index = ");

   149             sb.append(parameter_index);

   150             break;

   151             // method type argument: wasn't specified

   152         case METHOD_TYPE_ARGUMENT:

   153         case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY:

   154             sb.append(", offset = ");

   155             sb.append(offset);

   156             sb.append(", type_index = ");

   157             sb.append(type_index);

   158             break;

   159             // We don't need to worry abut these

   160         case METHOD_RETURN_GENERIC_OR_ARRAY:

   161         case FIELD_GENERIC_OR_ARRAY:

   162             break;

   163         case UNKNOWN:

   164             break;

   165         default:

   166             //                throw new AssertionError("unknown type: " + type);

   167         }

   169         // Append location data for generics/arrays.

   170         if (type.hasLocation()) {

   171             sb.append(", location = (");

   172             sb.append(location);

   173             sb.append(")");

   174         }

   176         sb.append(", pos = ");

   177         sb.append(pos);

   179         sb.append(']');

   180         return sb.toString();

   181     }

   183     /**

   184      * Indicates whether the target tree of the annotation has been optimized

   185      * away from classfile or not.

   186      * @return true if the target has not been optimized away

   187      */

   188     public boolean emitToClassfile() {

   189         if (type == TargetType.WILDCARD_BOUND

   190             || type == TargetType.WILDCARD_BOUND_GENERIC_OR_ARRAY)

   191             return wildcard_position.isValidOffset;

   192         else

   193             return !type.isLocal() || isValidOffset;

   194     }

   195 }

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