jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/code/TargetType.java@664edca41e34 (annotated)

src/share/classes/com/sun/tools/javac/code/TargetType.java@664edca41e34 (annotated)

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

Fri, 26 Jun 2009 19:12:41 -0700

author: jjg
date: Fri, 26 Jun 2009 19:12:41 -0700
changeset 309: 664edca41e34
child 310: 7c154fdc3547
permissions: -rw-r--r--

6855544: add missing files
Reviewed-by: jjg, mcimadamore, darcy
Contributed-by: mernst@cs.washington.edu, mali@csail.mit.edu, mpapi@csail.mit.edu

 /*
  * Copyright 2008-2009 Sun Microsystems, Inc.  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.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 package com.sun.tools.javac.code;
 import static com.sun.tools.javac.code.TargetType.TargetAttribute.*;
 import java.util.EnumSet;
 import java.util.Set;
 /**
  * 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 API supported by Sun Microsystems.  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>
  */
 public enum TargetType {
     //
     // Some target types are commented out, because Java doesn't permit such
     // targets.  They are included here to confirm that their omission is
     // intentional omission not an accidental omission.
     //
     /** For annotations on typecasts. */
     TYPECAST(0x00),
     /** For annotations on a type argument or nested array of a typecast. */
     TYPECAST_GENERIC_OR_ARRAY(0x01, HasLocation),
     /** For annotations on type tests. */
     INSTANCEOF(0x02),
     /** For annotations on a type argument or nested array of a type test. */
     INSTANCEOF_GENERIC_OR_ARRAY(0x03, HasLocation),
     /** For annotations on object creation expressions. */
     NEW(0x04),
     /**
      * For annotations on a type argument or nested array of an object creation
      * expression.
      */
     NEW_GENERIC_OR_ARRAY(0x05, HasLocation),
     /** For annotations on the method receiver. */
     METHOD_RECEIVER(0x06),
     // invalid location
     //@Deprecated METHOD_RECEIVER_GENERIC_OR_ARRAY(0x07, HasLocation),
     /** For annotations on local variables. */
     LOCAL_VARIABLE(0x08),
     /** For annotations on a type argument or nested array of a local. */
     LOCAL_VARIABLE_GENERIC_OR_ARRAY(0x09, HasLocation),
     // handled by regular annotations
     //@Deprecated METHOD_RETURN(0x0A),
     /**
      * For annotations on a type argument or nested array of a method return
      * type.
      */
     METHOD_RETURN_GENERIC_OR_ARRAY(0x0B, HasLocation),
     // handled by regular annotations
     //@Deprecated METHOD_PARAMETER(0x0C),
     /** For annotations on a type argument or nested array of a method parameter. */
     METHOD_PARAMETER_GENERIC_OR_ARRAY(0x0D, HasLocation),
     // handled by regular annotations
     //@Deprecated FIELD(0x0E),
     /** For annotations on a type argument or nested array of a field. */
     FIELD_GENERIC_OR_ARRAY(0x0F, HasLocation),
     /** For annotations on a bound of a type parameter of a class. */
     CLASS_TYPE_PARAMETER_BOUND(0x10, HasBound, HasParameter),
     /**
      * For annotations on a type argument or nested array of a bound of a type
      * parameter of a class.
      */
     CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY(0x11, HasBound, HasLocation, HasParameter),
     /** For annotations on a bound of a type parameter of a method. */
     METHOD_TYPE_PARAMETER_BOUND(0x12, HasBound, HasParameter),
     /**
      * For annotations on a type argument or nested array of a bound of a type
      * parameter of a method.
      */
     METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY(0x13, HasBound, HasLocation, HasParameter),
     /** For annotations on the type of an "extends" or "implements" clause. */
     CLASS_EXTENDS(0x14),
     /** For annotations on the inner type of an "extends" or "implements" clause. */
     CLASS_EXTENDS_GENERIC_OR_ARRAY(0x15, HasLocation),
     /** For annotations on a throws clause in a method declaration. */
     THROWS(0x16),
     // invalid location
     //@Deprecated THROWS_GENERIC_OR_ARRAY(0x17, HasLocation),
     /** For annotations in type arguments of object creation expressions. */
     NEW_TYPE_ARGUMENT(0x18),
     NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY(0x19, HasLocation),
     METHOD_TYPE_ARGUMENT(0x1A),
     METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY(0x1B, HasLocation),
     WILDCARD_BOUND(0x1C, HasBound),
     WILDCARD_BOUND_GENERIC_OR_ARRAY(0x1D, HasBound, HasLocation),
     CLASS_LITERAL(0x1E),
     CLASS_LITERAL_GENERIC_OR_ARRAY(0x1F, HasLocation),
     METHOD_TYPE_PARAMETER(0x20, HasParameter),
     // invalid location
     //@Deprecated METHOD_TYPE_PARAMETER_GENERIC_OR_ARRAY(0x21, HasLocation, HasParameter),
     CLASS_TYPE_PARAMETER(0x22, HasParameter),
     // invalid location
     //@Deprecated CLASS_TYPE_PARAMETER_GENERIC_OR_ARRAY(0x23, HasLocation, HasParameter),
     /** For annotations with an unknown target. */
     UNKNOWN(-1);
     static final int MAXIMUM_TARGET_TYPE_VALUE = 0x22;
     private final int targetTypeValue;
     private Set<TargetAttribute> flags;
     TargetType(int targetTypeValue, TargetAttribute... attributes) {
         if (targetTypeValue < Byte.MIN_VALUE
                 || targetTypeValue > Byte.MAX_VALUE)
                 throw new AssertionError("attribute type value needs to be a byte: " + targetTypeValue);
         this.targetTypeValue = (byte)targetTypeValue;
         flags = EnumSet.noneOf(TargetAttribute.class);
         for (TargetAttribute attr : attributes)
             flags.add(attr);
     }
     /**
      * Returns whether or not this TargetType represents an annotation whose
      * target is an inner type of a generic or array type.
      *
      * @return true if this TargetType represents an annotation on an inner
      *         type, false otherwise
      */
     public boolean hasLocation() {
         return flags.contains(HasLocation);
     }
     public TargetType getGenericComplement() {
         if (hasLocation())
             return this;
         else
             return fromTargetTypeValue(targetTypeValue() + 1);
     }
     /**
      * Returns whether or not this TargetType represents an annotation whose
      * target has a parameter index.
      *
      * @return true if this TargetType has a parameter index,
      *         false otherwise
      */
     public boolean hasParameter() {
         return flags.contains(HasParameter);
     }
     /**
      * Returns whether or not this TargetType represents an annotation whose
      * target is a type parameter bound.
      *
      * @return true if this TargetType represents an type parameter bound
      *         annotation, false otherwise
      */
     public boolean hasBound() {
         return flags.contains(HasBound);
     }
     public int targetTypeValue() {
         return this.targetTypeValue;
     }
     private static TargetType[] targets = null;
     private static TargetType[] buildTargets() {
         TargetType[] targets = new TargetType[MAXIMUM_TARGET_TYPE_VALUE + 1];
         TargetType[] alltargets = values();
         for (TargetType target : alltargets) {
             if (target.targetTypeValue >= 0)
                 targets[target.targetTypeValue] = target;
         }
         for (int i = 0; i <= MAXIMUM_TARGET_TYPE_VALUE; ++i) {
             if (targets[i] == null)
                 targets[i] = UNKNOWN;
         }
         return targets;
     }
     public static boolean isValidTargetTypeValue(int tag) {
         if (targets == null)
             targets = buildTargets();
         if (((byte)tag) == ((byte)UNKNOWN.targetTypeValue))
             return true;
         return (tag >= 0 && tag < targets.length);
     }
     public static TargetType fromTargetTypeValue(int tag) {
         if (targets == null)
             targets = buildTargets();
         if (((byte)tag) == ((byte)UNKNOWN.targetTypeValue))
             return UNKNOWN;
         if (tag < 0 || tag >= targets.length)
             throw new IllegalArgumentException("Unknown TargetType: " + tag);
         return targets[tag];
     }
     static enum TargetAttribute {
         HasLocation, HasParameter, HasBound;
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/code/TargetType.java@664edca41e34 (annotated)

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