| /* |
| * 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 type test. */ |
| INSTANCEOF(0x43, true), |
| |
| /** For annotations on an object creation expression. */ |
| NEW(0x44, true), |
| |
| /** For annotations on a constructor reference receiver. */ |
| CONSTRUCTOR_REFERENCE(0x45, true), |
| |
| /** For annotations on a method reference receiver. */ |
| METHOD_REFERENCE(0x46, true), |
| |
| /** For annotations on a typecast. */ |
| CAST(0x47, true), |
| |
| /** For annotations on a type argument of an object creation expression. */ |
| CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT(0x48, true), |
| |
| /** For annotations on a type argument of a method call. */ |
| METHOD_INVOCATION_TYPE_ARGUMENT(0x49, true), |
| |
| /** For annotations on a type argument of a constructor reference. */ |
| CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT(0x4A, true), |
| |
| /** For annotations on a type argument of a method reference. */ |
| METHOD_REFERENCE_TYPE_ARGUMENT(0x4B, true); |
| |
| private static final int MAXIMUM_TARGET_TYPE_VALUE = 0x4B; |
| |
| 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) { |
| targets[target.targetTypeValue] = target; |
| } |
| } |
| |
| public static boolean isValidTargetTypeValue(int tag) { |
| return (tag >= 0 && tag < targets.length); |
| } |
| |
| public static TargetType fromTargetTypeValue(int tag) { |
| if (tag < 0 || tag >= targets.length) |
| Assert.error("Unknown TargetType: " + tag); |
| return targets[tag]; |
| } |
| } |