jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/code/TargetType.java@71f35e4b93a5 (annotated)

src/share/classes/com/sun/tools/javac/code/TargetType.java@71f35e4b93a5 (annotated)

src/share/classes/com/sun/tools/javac/code/TargetType.java

Wed, 23 Jan 2013 13:27:24 -0800

author: jjg
date: Wed, 23 Jan 2013 13:27:24 -0800
changeset 1521: 71f35e4b93a5
parent 1442: fcf89720ae71
child 1563: bc456436c613
permissions: -rw-r--r--

8006775: JSR 308: Compiler changes in JDK8
Reviewed-by: jjg
Contributed-by: mernst@cs.washington.edu, wmdietl@cs.washington.edu, mpapi@csail.mit.edu, mahmood@notnoop.com

 /*
  * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javac.code;
 import com.sun.tools.javac.util.Assert;
 /**
  * Describes the type of program element an extended annotation (or extended
  * compound attribute) targets.
  *
  * By comparison, a Tree.Kind has enum values for all elements in the AST, and
  * it does not provide enough resolution for type arguments (i.e., whether an
  * annotation targets a type argument in a local variable, method return type,
  * or a typecast).
  *
  *  <p><b>This is NOT part of any supported API.
  *  If you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 // Code duplicated in com.sun.tools.classfile.TypeAnnotation.TargetType
 public enum TargetType {
     /** For annotations on a class type parameter declaration. */
     CLASS_TYPE_PARAMETER(0x00),
     /** For annotations on a method type parameter declaration. */
     METHOD_TYPE_PARAMETER(0x01),
     /** For annotations on the type of an "extends" or "implements" clause. */
     CLASS_EXTENDS(0x10),
     /** For annotations on a bound of a type parameter of a class. */
     CLASS_TYPE_PARAMETER_BOUND(0x11),
     /** For annotations on a bound of a type parameter of a method. */
     METHOD_TYPE_PARAMETER_BOUND(0x12),
     /** For annotations on a field. */
     FIELD(0x13),
     /** For annotations on a method return type. */
     METHOD_RETURN(0x14),
     /** For annotations on the method receiver. */
     METHOD_RECEIVER(0x15),
     /** For annotations on a method parameter. */
     METHOD_FORMAL_PARAMETER(0x16),
     /** For annotations on a throws clause in a method declaration. */
     THROWS(0x17),
     /** For annotations on a local variable. */
     LOCAL_VARIABLE(0x40, true),
     /** For annotations on a resource variable. */
     RESOURCE_VARIABLE(0x41, true),
     /** For annotations on an exception parameter. */
     EXCEPTION_PARAMETER(0x42, true),
     /** For annotations on a typecast. */
     CAST(0x43, true),
     /** For annotations on a type test. */
     INSTANCEOF(0x44, true),
     /** For annotations on an object creation expression. */
     NEW(0x45, true),
     /** For annotations on a type argument of an object creation expression. */
     CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT(0x46, true),
     /** For annotations on a type argument of a method call. */
     METHOD_INVOCATION_TYPE_ARGUMENT(0x47, true),
     /** For annotations on a lambda parameter type. */
     LAMBDA_FORMAL_PARAMETER(0x48, true),
     /** For annotations on a method reference. */
     METHOD_REFERENCE(0x49, true),
     /** For annotations on a type argument of a method reference. */
     METHOD_REFERENCE_TYPE_ARGUMENT(0x50, true),
     /** For annotations with an unknown target. */
     UNKNOWN(0xFF);
     private static final int MAXIMUM_TARGET_TYPE_VALUE = 0x92;
     private final int targetTypeValue;
     private final boolean isLocal;
     private TargetType(int targetTypeValue) {
         this(targetTypeValue, false);
     }
     private TargetType(int targetTypeValue, boolean isLocal) {
         if (targetTypeValue < 0
                 || targetTypeValue > 255)
                 Assert.error("Attribute type value needs to be an unsigned byte: " + String.format("0x%02X", targetTypeValue));
         this.targetTypeValue = targetTypeValue;
         this.isLocal = isLocal;
     }
     /**
      * Returns whether or not this TargetType represents an annotation whose
      * target is exclusively a tree in a method body
      *
      * Note: wildcard bound targets could target a local tree and a class
      * member declaration signature tree
      */
     public boolean isLocal() {
         return isLocal;
     }
     public int targetTypeValue() {
         return this.targetTypeValue;
     }
     private static final TargetType[] targets;
     static {
         targets = new TargetType[MAXIMUM_TARGET_TYPE_VALUE + 1];
         TargetType[] alltargets = values();
         for (TargetType target : alltargets) {
             if (target.targetTypeValue != UNKNOWN.targetTypeValue)
                 targets[target.targetTypeValue] = target;
         }
         for (int i = 0; i <= MAXIMUM_TARGET_TYPE_VALUE; ++i) {
             if (targets[i] == null)
                 targets[i] = UNKNOWN;
         }
     }
     public static boolean isValidTargetTypeValue(int tag) {
         if (tag == UNKNOWN.targetTypeValue)
             return true;
         return (tag >= 0 && tag < targets.length);
     }
     public static TargetType fromTargetTypeValue(int tag) {
         if (tag == UNKNOWN.targetTypeValue)
             return UNKNOWN;
         if (tag < 0 || tag >= targets.length)
             Assert.error("Unknown TargetType: " + tag);
         return targets[tag];
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/code/TargetType.java@71f35e4b93a5 (annotated)

src/share/classes/com/sun/tools/javac/code/TargetType.java