jjg@309: /*
jjg@309:  * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.
jjg@309:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jjg@309:  *
jjg@309:  * This code is free software; you can redistribute it and/or modify it
jjg@309:  * under the terms of the GNU General Public License version 2 only, as
jjg@309:  * published by the Free Software Foundation.  Sun designates this
jjg@309:  * particular file as subject to the "Classpath" exception as provided
jjg@309:  * by Sun in the LICENSE file that accompanied this code.
jjg@309:  *
jjg@309:  * This code is distributed in the hope that it will be useful, but WITHOUT
jjg@309:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jjg@309:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jjg@309:  * version 2 for more details (a copy is included in the LICENSE file that
jjg@309:  * accompanied this code).
jjg@309:  *
jjg@309:  * You should have received a copy of the GNU General Public License version
jjg@309:  * 2 along with this work; if not, write to the Free Software Foundation,
jjg@309:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jjg@309:  *
jjg@309:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
jjg@309:  * CA 95054 USA or visit www.sun.com if you need additional information or
jjg@309:  * have any questions.
jjg@309:  */
jjg@309: 
jjg@309: package com.sun.tools.classfile;
jjg@309: 
jjg@309: import java.io.IOException;
jjg@309: import java.util.ArrayList;
jjg@309: import java.util.EnumSet;
jjg@309: import java.util.List;
jjg@309: import java.util.Set;
jjg@309: 
jjg@309: import static com.sun.tools.classfile.ExtendedAnnotation.TargetAttribute.*;
jjg@309: 
jjg@309: /**
jjg@309:  * See JSR 308 specification, section 4.1
jjg@309:  *
jjg@309:  *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
jjg@309:  *  you write code that depends on this, you do so at your own risk.
jjg@309:  *  This code and its internal interfaces are subject to change or
jjg@309:  *  deletion without notice.</b>
jjg@309:  */
jjg@309: public class ExtendedAnnotation {
jjg@309:     ExtendedAnnotation(ClassReader cr) throws IOException, Annotation.InvalidAnnotation {
jjg@309:         annotation = new Annotation(cr);
jjg@309:         position = read_position(cr);
jjg@309:     }
jjg@309: 
jjg@309:     public ExtendedAnnotation(ConstantPool constant_pool,
jjg@309:             Annotation annotation, Position position) {
jjg@309:         this.annotation = annotation;
jjg@309:         this.position = position;
jjg@309:     }
jjg@309: 
jjg@309:     public int length() {
jjg@309:         int n = annotation.length();
jjg@309:         n += position_length(position);
jjg@309:         return n;
jjg@309:     }
jjg@309: 
jjg@309:     public final Annotation annotation;
jjg@309:     public final Position position;
jjg@309: 
jjg@309:     private static Position read_position(ClassReader cr) throws IOException, Annotation.InvalidAnnotation {
jjg@309:         // Copied from ClassReader
jjg@309:         int tag = (byte)cr.readUnsignedByte();  // cast to introduce signedness
jjg@309:         if (!TargetType.isValidTargetTypeValue(tag))
jjg@309:             throw new Annotation.InvalidAnnotation("invalid type annotation target type value: " + tag);
jjg@309: 
jjg@309:         TargetType type = TargetType.fromTargetTypeValue(tag);
jjg@309: 
jjg@309:         Position position = new Position();
jjg@309:         position.type = type;
jjg@309: 
jjg@309:         switch (type) {
jjg@309:         // type case
jjg@309:         case TYPECAST:
jjg@309:         case TYPECAST_GENERIC_OR_ARRAY:
jjg@309:         // object creation
jjg@309:         case INSTANCEOF:
jjg@309:         case INSTANCEOF_GENERIC_OR_ARRAY:
jjg@309:         // new expression
jjg@309:         case NEW:
jjg@309:         case NEW_GENERIC_OR_ARRAY:
jjg@309:             position.offset = cr.readUnsignedShort();
jjg@309:             break;
jjg@309:          // local variable
jjg@309:         case LOCAL_VARIABLE:
jjg@309:         case LOCAL_VARIABLE_GENERIC_OR_ARRAY:
jjg@309:             int table_length = cr.readUnsignedShort();
jjg@309:             position.lvarOffset = new int[table_length];
jjg@309:             position.lvarLength = new int[table_length];
jjg@309:             position.lvarIndex = new int[table_length];
jjg@309:             for (int i = 0; i < table_length; ++i) {
jjg@309:                 position.lvarOffset[i] = cr.readUnsignedShort();
jjg@309:                 position.lvarLength[i] = cr.readUnsignedShort();
jjg@309:                 position.lvarIndex[i] = cr.readUnsignedShort();
jjg@309:             }
jjg@309:             break;
jjg@309:          // method receiver
jjg@309:         case METHOD_RECEIVER:
jjg@309:             // Do nothing
jjg@309:             break;
jjg@309:         // type parameters
jjg@309:         case CLASS_TYPE_PARAMETER:
jjg@309:         case METHOD_TYPE_PARAMETER:
jjg@309:             position.parameter_index = cr.readUnsignedByte();
jjg@309:             break;
jjg@309:         // type parameter bounds
jjg@309:         case CLASS_TYPE_PARAMETER_BOUND:
jjg@309:         case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
jjg@309:         case METHOD_TYPE_PARAMETER_BOUND:
jjg@309:         case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
jjg@309:             position.parameter_index = cr.readUnsignedByte();
jjg@309:             position.bound_index = cr.readUnsignedByte();
jjg@309:             break;
jjg@309:          // wildcards
jjg@309:         case WILDCARD_BOUND:
jjg@309:         case WILDCARD_BOUND_GENERIC_OR_ARRAY:
jjg@309:             position.wildcard_position = read_position(cr);
jjg@309:             break;
jjg@309:          // Class extends and implements clauses
jjg@309:         case CLASS_EXTENDS:
jjg@309:         case CLASS_EXTENDS_GENERIC_OR_ARRAY:
jjg@309:             position.type_index = cr.readUnsignedByte();
jjg@309:             break;
jjg@309:         // throws
jjg@309:         case THROWS:
jjg@309:             position.type_index = cr.readUnsignedByte();
jjg@309:             break;
jjg@309:         case CLASS_LITERAL:
jjg@309:         case CLASS_LITERAL_GENERIC_OR_ARRAY:
jjg@309:             position.offset = cr.readUnsignedShort();
jjg@309:             break;
jjg@309:         // method parameter: not specified
jjg@309:         case METHOD_PARAMETER_GENERIC_OR_ARRAY:
jjg@309:             position.parameter_index = cr.readUnsignedByte();
jjg@309:             break;
jjg@309:         // method type argument: wasn't specified
jjg@309:         case NEW_TYPE_ARGUMENT:
jjg@309:         case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
jjg@309:         case METHOD_TYPE_ARGUMENT:
jjg@309:         case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
jjg@309:             position.offset = cr.readUnsignedShort();
jjg@309:             position.type_index = cr.readUnsignedByte();
jjg@309:             break;
jjg@309:         // We don't need to worry abut these
jjg@309:         case METHOD_RETURN_GENERIC_OR_ARRAY:
jjg@309:         case FIELD_GENERIC_OR_ARRAY:
jjg@309:             break;
jjg@309:         case UNKNOWN:
jjg@309:             break;
jjg@309:         default:
jjg@309:             throw new AssertionError("Cannot be here");
jjg@309:         }
jjg@309: 
jjg@309:         if (type.hasLocation()) {
jjg@309:             int len = cr.readUnsignedShort();
jjg@309:             List<Integer> loc = new ArrayList<Integer>(len);
jjg@309:             for (int i = 0; i < len; i++)
jjg@309:                 loc.add(cr.readUnsignedByte());
jjg@309:             position.location = loc;
jjg@309:         }
jjg@309:         return position;
jjg@309:     }
jjg@309: 
jjg@309:     private static int position_length(Position pos) {
jjg@309:         int n = 0;
jjg@309:         n += 1; // target_type
jjg@309:         switch (pos.type) {
jjg@309:         // type case
jjg@309:         case TYPECAST:
jjg@309:         case TYPECAST_GENERIC_OR_ARRAY:
jjg@309:         // object creation
jjg@309:         case INSTANCEOF:
jjg@309:         case INSTANCEOF_GENERIC_OR_ARRAY:
jjg@309:         // new expression
jjg@309:         case NEW:
jjg@309:         case NEW_GENERIC_OR_ARRAY:
jjg@309:             n += 2;
jjg@309:             break;
jjg@309:          // local variable
jjg@309:         case LOCAL_VARIABLE:
jjg@309:         case LOCAL_VARIABLE_GENERIC_OR_ARRAY:
jjg@309:             n += 2; // table_length;
jjg@309:             int table_length = pos.lvarOffset.length;
jjg@309:             n += 2 * table_length; // offset
jjg@309:             n += 2 * table_length; // length;
jjg@309:             n += 2 * table_length; // index
jjg@309:             break;
jjg@309:          // method receiver
jjg@309:         case METHOD_RECEIVER:
jjg@309:             // Do nothing
jjg@309:             break;
jjg@309:         // type parameters
jjg@309:         case CLASS_TYPE_PARAMETER:
jjg@309:         case METHOD_TYPE_PARAMETER:
jjg@309:             n += 1; // parameter_index;
jjg@309:             break;
jjg@309:         // type parameter bounds
jjg@309:         case CLASS_TYPE_PARAMETER_BOUND:
jjg@309:         case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
jjg@309:         case METHOD_TYPE_PARAMETER_BOUND:
jjg@309:         case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
jjg@309:             n += 1; // parameter_index
jjg@309:             n += 1; // bound_index
jjg@309:             break;
jjg@309:         case WILDCARD_BOUND:
jjg@309:         case WILDCARD_BOUND_GENERIC_OR_ARRAY:
jjg@309:             n += position_length(pos.wildcard_position);
jjg@309:             break;
jjg@309:          // Class extends and implements clauses
jjg@309:         case CLASS_EXTENDS:
jjg@309:         case CLASS_EXTENDS_GENERIC_OR_ARRAY:
jjg@309:             n += 1; // type_index
jjg@309:             break;
jjg@309:         // throws
jjg@309:         case THROWS:
jjg@309:             n += 1; // type_index
jjg@309:             break;
jjg@309:         case CLASS_LITERAL:
jjg@309:         case CLASS_LITERAL_GENERIC_OR_ARRAY:
jjg@309:             n += 1; // offset
jjg@309:             break;
jjg@309:         // method parameter: not specified
jjg@309:         case METHOD_PARAMETER_GENERIC_OR_ARRAY:
jjg@309:             n += 1; // parameter_index
jjg@309:             break;
jjg@309:         // method type argument: wasn't specified
jjg@309:         case NEW_TYPE_ARGUMENT:
jjg@309:         case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
jjg@309:         case METHOD_TYPE_ARGUMENT:
jjg@309:         case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
jjg@309:             n += 2; // offset
jjg@309:             n += 1; // type index
jjg@309:             break;
jjg@309:         // We don't need to worry abut these
jjg@309:         case METHOD_RETURN_GENERIC_OR_ARRAY:
jjg@309:         case FIELD_GENERIC_OR_ARRAY:
jjg@309:             break;
jjg@309:         case UNKNOWN:
jjg@309:             break;
jjg@309:         default:
jjg@309:         }
jjg@309: 
jjg@309:         if (pos.type.hasLocation()) {
jjg@309:             n += 2; // length
jjg@309:             n += 1 * pos.location.size(); // actual array size
jjg@309:         }
jjg@309: 
jjg@309:         return n;
jjg@309:     }
jjg@309: 
jjg@309:     // Code duplicated from com.sun.tools.javac.code.TypeAnnotations.Position
jjg@309:     public static class Position {
jjg@309: 
jjg@309:         public TargetType type = TargetType.UNKNOWN;
jjg@309: 
jjg@309:         // For generic/array types.
jjg@309:         public List<Integer> location = new ArrayList<Integer>();
jjg@309: 
jjg@309:         // Tree position.
jjg@309:         public int pos = -1;
jjg@309: 
jjg@309:         // For typecasts, type tests, new (and locals, as start_pc).
jjg@309:         public int offset = -1;
jjg@309: 
jjg@309:         // For locals.
jjg@309:         public int[] lvarOffset = new int[] { -1 };
jjg@309:         public int[] lvarLength = new int[] { -1 };
jjg@309:         public int[] lvarIndex = new int[] { -1 };
jjg@309: 
jjg@309:         // For type parameter bound
jjg@309:         public int bound_index = -1;
jjg@309: 
jjg@309:         // For type parameter and method parameter
jjg@309:         public int parameter_index = -1;
jjg@309: 
jjg@309:         // For class extends, implements, and throws classes
jjg@309:         public int type_index = -2;
jjg@309: 
jjg@309:         // For wildcards
jjg@309:         public Position wildcard_position = null;
jjg@309: 
jjg@309:         @Override
jjg@309:         public String toString() {
jjg@309:             StringBuilder sb = new StringBuilder();
jjg@309:             sb.append('[');
jjg@309:             sb.append(type);
jjg@309: 
jjg@309:             switch (type) {
jjg@309:             // type case
jjg@309:             case TYPECAST:
jjg@309:             case TYPECAST_GENERIC_OR_ARRAY:
jjg@309:             // object creation
jjg@309:             case INSTANCEOF:
jjg@309:             case INSTANCEOF_GENERIC_OR_ARRAY:
jjg@309:             // new expression
jjg@309:             case NEW:
jjg@309:             case NEW_GENERIC_OR_ARRAY:
jjg@309:             case NEW_TYPE_ARGUMENT:
jjg@309:             case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
jjg@309:                 sb.append(", offset = ");
jjg@309:                 sb.append(offset);
jjg@309:                 break;
jjg@309:              // local variable
jjg@309:             case LOCAL_VARIABLE:
jjg@309:             case LOCAL_VARIABLE_GENERIC_OR_ARRAY:
jjg@309:                 sb.append(", {");
jjg@309:                 for (int i = 0; i < lvarOffset.length; ++i) {
jjg@309:                     if (i != 0) sb.append("; ");
jjg@309:                     sb.append(", start_pc = ");
jjg@309:                     sb.append(lvarOffset[i]);
jjg@309:                     sb.append(", length = ");
jjg@309:                     sb.append(lvarLength[i]);
jjg@309:                     sb.append(", index = ");
jjg@309:                     sb.append(lvarIndex[i]);
jjg@309:                 }
jjg@309:                 sb.append("}");
jjg@309:                 break;
jjg@309:              // method receiver
jjg@309:             case METHOD_RECEIVER:
jjg@309:                 // Do nothing
jjg@309:                 break;
jjg@309:             // type parameters
jjg@309:             case CLASS_TYPE_PARAMETER:
jjg@309:             case METHOD_TYPE_PARAMETER:
jjg@309:                 sb.append(", param_index = ");
jjg@309:                 sb.append(parameter_index);
jjg@309:                 break;
jjg@309:             // type parameters bound
jjg@309:             case CLASS_TYPE_PARAMETER_BOUND:
jjg@309:             case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
jjg@309:             case METHOD_TYPE_PARAMETER_BOUND:
jjg@309:             case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
jjg@309:                 sb.append(", param_index = ");
jjg@309:                 sb.append(parameter_index);
jjg@309:                 sb.append(", bound_index = ");
jjg@309:                 sb.append(bound_index);
jjg@309:                 break;
jjg@309:              // wildcard
jjg@309:             case WILDCARD_BOUND:
jjg@309:             case WILDCARD_BOUND_GENERIC_OR_ARRAY:
jjg@309:                 sb.append(", wild_card = ");
jjg@309:                 sb.append(wildcard_position);
jjg@309:                 break;
jjg@309:              // Class extends and implements clauses
jjg@309:             case CLASS_EXTENDS:
jjg@309:             case CLASS_EXTENDS_GENERIC_OR_ARRAY:
jjg@309:                 sb.append(", type_index = ");
jjg@309:                 sb.append(type_index);
jjg@309:                 break;
jjg@309:             // throws
jjg@309:             case THROWS:
jjg@309:                 sb.append(", type_index = ");
jjg@309:                 sb.append(type_index);
jjg@309:                 break;
jjg@309:             case CLASS_LITERAL:
jjg@309:                 sb.append(", offset = ");
jjg@309:                 sb.append(offset);
jjg@309:                 break;
jjg@309:             // method parameter: not specified
jjg@309:             case METHOD_PARAMETER_GENERIC_OR_ARRAY:
jjg@309:                 sb.append(", param_index = ");
jjg@309:                 sb.append(parameter_index);
jjg@309:                 break;
jjg@309:             // method type argument: wasn't specified
jjg@309:             case METHOD_TYPE_ARGUMENT:
jjg@309:             case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
jjg@309:                 sb.append(", offset = ");
jjg@309:                 sb.append(offset);
jjg@309:                 sb.append(", type_index = ");
jjg@309:                 sb.append(type_index);
jjg@309:                 break;
jjg@309:             // We don't need to worry abut these
jjg@309:             case METHOD_RETURN_GENERIC_OR_ARRAY:
jjg@309:             case FIELD_GENERIC_OR_ARRAY:
jjg@309:                 break;
jjg@309:             case UNKNOWN:
jjg@309:                 break;
jjg@309:             default:
jjg@309:                 throw new AssertionError("unknown type: " + type);
jjg@309:             }
jjg@309: 
jjg@309:             // Append location data for generics/arrays.
jjg@309:             if (type.hasLocation()) {
jjg@309:                 sb.append(", location = (");
jjg@309:                 sb.append(location);
jjg@309:                 sb.append(")");
jjg@309:             }
jjg@309: 
jjg@309:             sb.append(", pos = ");
jjg@309:             sb.append(pos);
jjg@309: 
jjg@309:             sb.append(']');
jjg@309:             return sb.toString();
jjg@309:         }
jjg@309:     }
jjg@309: 
jjg@309:     // Code duplicated from com.sun.tools.javac.comp.TargetType
jjg@309:     public enum TargetType {
jjg@309: 
jjg@309:         /** For annotations on typecasts. */
jjg@309:         TYPECAST(0x00),
jjg@309: 
jjg@309:         /** For annotations on a type argument or nested array of a typecast. */
jjg@309:         TYPECAST_GENERIC_OR_ARRAY(0x01, HasLocation),
jjg@309: 
jjg@309:         /** For annotations on type tests. */
jjg@309:         INSTANCEOF(0x02),
jjg@309: 
jjg@309:         /** For annotations on a type argument or nested array of a type test. */
jjg@309:         INSTANCEOF_GENERIC_OR_ARRAY(0x03, HasLocation),
jjg@309: 
jjg@309:         /** For annotations on object creation expressions. */
jjg@309:         NEW(0x04),
jjg@309: 
jjg@309:         /**
jjg@309:          * For annotations on a type argument or nested array of an object creation
jjg@309:          * expression.
jjg@309:          */
jjg@309:         NEW_GENERIC_OR_ARRAY(0x05, HasLocation),
jjg@309: 
jjg@309: 
jjg@309:         /** For annotations on the method receiver. */
jjg@309:         METHOD_RECEIVER(0x06),
jjg@309: 
jjg@309:         // invalid location
jjg@309:         // METHOD_RECEIVER_GENERIC_OR_ARRAY(0x07, HasLocation),
jjg@309: 
jjg@309:         /** For annotations on local variables. */
jjg@309:         LOCAL_VARIABLE(0x08),
jjg@309: 
jjg@309:         /** For annotations on a type argument or nested array of a local. */
jjg@309:         LOCAL_VARIABLE_GENERIC_OR_ARRAY(0x09, HasLocation),
jjg@309: 
jjg@309:         // already handled by regular annotations
jjg@309:         // METHOD_RETURN(0x0A),
jjg@309: 
jjg@309:         /**
jjg@309:          * For annotations on a type argument or nested array of a method return
jjg@309:          * type.
jjg@309:          */
jjg@309:         METHOD_RETURN_GENERIC_OR_ARRAY(0x0B, HasLocation),
jjg@309: 
jjg@309:         // already handled by regular annotations
jjg@309:         // METHOD_PARAMETER(0x0C),
jjg@309: 
jjg@309:         /** For annotations on a type argument or nested array of a method parameter. */
jjg@309:         METHOD_PARAMETER_GENERIC_OR_ARRAY(0x0D, HasLocation),
jjg@309: 
jjg@309:         // already handled by regular annotations
jjg@309:         // FIELD(0x0E),
jjg@309: 
jjg@309:         /** For annotations on a type argument or nested array of a field. */
jjg@309:         FIELD_GENERIC_OR_ARRAY(0x0F, HasLocation),
jjg@309: 
jjg@309:         /** For annotations on a bound of a type parameter of a class. */
jjg@309:         CLASS_TYPE_PARAMETER_BOUND(0x10, HasBound, HasParameter),
jjg@309: 
jjg@309:         /**
jjg@309:          * For annotations on a type argument or nested array of a bound of a type
jjg@309:          * parameter of a class.
jjg@309:          */
jjg@309:         CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY(0x11, HasBound, HasLocation, HasParameter),
jjg@309: 
jjg@309:         /** For annotations on a bound of a type parameter of a method. */
jjg@309:         METHOD_TYPE_PARAMETER_BOUND(0x12, HasBound, HasParameter),
jjg@309: 
jjg@309:         /**
jjg@309:          * For annotations on a type argument or nested array of a bound of a type
jjg@309:          * parameter of a method.
jjg@309:          */
jjg@309:         METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY(0x13, HasBound, HasLocation, HasParameter),
jjg@309: 
jjg@309:         /** For annotations on the type of an "extends" or "implements" clause. */
jjg@309:         CLASS_EXTENDS(0x14),
jjg@309: 
jjg@309:         /** For annotations on the inner type of an "extends" or "implements" clause. */
jjg@309:         CLASS_EXTENDS_GENERIC_OR_ARRAY(0x15, HasLocation),
jjg@309: 
jjg@309:         /** For annotations on a throws clause in a method declaration. */
jjg@309:         THROWS(0x16),
jjg@309: 
jjg@309:         // invalid location
jjg@309:         // THROWS_GENERIC_OR_ARRAY(0x17, HasLocation),
jjg@309: 
jjg@309:         /** For annotations in type arguments of object creation expressions. */
jjg@309:         NEW_TYPE_ARGUMENT(0x18),
jjg@309:         NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY(0x19, HasLocation),
jjg@309: 
jjg@309:         METHOD_TYPE_ARGUMENT(0x1A),
jjg@309:         METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY(0x1B, HasLocation),
jjg@309: 
jjg@309:         WILDCARD_BOUND(0x1C, HasBound),
jjg@309:         WILDCARD_BOUND_GENERIC_OR_ARRAY(0x1D, HasBound, HasLocation),
jjg@309: 
jjg@309:         CLASS_LITERAL(0x1E),
jjg@309:         CLASS_LITERAL_GENERIC_OR_ARRAY(0x1F, HasLocation),
jjg@309: 
jjg@309:         METHOD_TYPE_PARAMETER(0x20, HasParameter),
jjg@309: 
jjg@309:         // invalid location
jjg@309:         // METHOD_TYPE_PARAMETER_GENERIC_OR_ARRAY(0x21, HasLocation, HasParameter),
jjg@309: 
jjg@309:         CLASS_TYPE_PARAMETER(0x22, HasParameter),
jjg@309: 
jjg@309:         // invalid location
jjg@309:         // CLASS_TYPE_PARAMETER_GENERIC_OR_ARRAY(0x23, HasLocation, HasParameter),
jjg@309: 
jjg@309:         /** For annotations with an unknown target. */
jjg@309:         UNKNOWN(-1);
jjg@309: 
jjg@309:         static final int MAXIMUM_TARGET_TYPE_VALUE = 0x22;
jjg@309: 
jjg@309:         private final int targetTypeValue;
jjg@309:         private Set<TargetAttribute> flags;
jjg@309: 
jjg@309:         TargetType(int targetTypeValue, TargetAttribute... attrs) {
jjg@309:             if (targetTypeValue < Byte.MIN_VALUE
jjg@309:                 || targetTypeValue > Byte.MAX_VALUE)
jjg@309:                 throw new AssertionError("attribute type value needs to be a byte: " + targetTypeValue);
jjg@309:             this.targetTypeValue = (byte)targetTypeValue;
jjg@309:             this.flags = EnumSet.noneOf(TargetAttribute.class);
jjg@309:             for (TargetAttribute attr : attrs)
jjg@309:                 this.flags.add(attr);
jjg@309:         }
jjg@309: 
jjg@309:         /**
jjg@309:          * Returns whether or not this TargetType represents an annotation whose
jjg@309:          * target is an inner type of a generic or array type.
jjg@309:          *
jjg@309:          * @return true if this TargetType represents an annotation on an inner
jjg@309:          *         type, false otherwise
jjg@309:          */
jjg@309:         public boolean hasLocation() {
jjg@309:             return flags.contains(HasLocation);
jjg@309:         }
jjg@309: 
jjg@309:         public TargetType getGenericComplement() {
jjg@309:             if (hasLocation())
jjg@309:                 return this;
jjg@309:             else
jjg@309:                 return fromTargetTypeValue(targetTypeValue() + 1);
jjg@309:         }
jjg@309: 
jjg@309:         /**
jjg@309:          * Returns whether or not this TargetType represents an annotation whose
jjg@309:          * target has a parameter index.
jjg@309:          *
jjg@309:          * @return true if this TargetType has a parameter index,
jjg@309:          *         false otherwise
jjg@309:          */
jjg@309:         public boolean hasParameter() {
jjg@309:             return flags.contains(HasParameter);
jjg@309:         }
jjg@309: 
jjg@309:         /**
jjg@309:          * Returns whether or not this TargetType represents an annotation whose
jjg@309:          * target is a type parameter bound.
jjg@309:          *
jjg@309:          * @return true if this TargetType represents an type parameter bound
jjg@309:          *         annotation, false otherwise
jjg@309:          */
jjg@309:         public boolean hasBound() {
jjg@309:             return flags.contains(HasBound);
jjg@309:         }
jjg@309: 
jjg@309:         public int targetTypeValue() {
jjg@309:             return this.targetTypeValue;
jjg@309:         }
jjg@309: 
jjg@309:         private static TargetType[] targets = null;
jjg@309: 
jjg@309:         private static TargetType[] buildTargets() {
jjg@309:             TargetType[] targets = new TargetType[MAXIMUM_TARGET_TYPE_VALUE + 1];
jjg@309:             TargetType[] alltargets = values();
jjg@309:             for (TargetType target : alltargets)
jjg@309:                 if (target.targetTypeValue >= 0)
jjg@309:                     targets[target.targetTypeValue] = target;
jjg@309:             for (int i = 0; i <= MAXIMUM_TARGET_TYPE_VALUE; ++i)
jjg@309:                 if (targets[i] == null)
jjg@309:                     targets[i] = UNKNOWN;
jjg@309:             return targets;
jjg@309:         }
jjg@309: 
jjg@309:         public static boolean isValidTargetTypeValue(int tag) {
jjg@309:             if (targets == null)
jjg@309:                 targets = buildTargets();
jjg@309: 
jjg@309:             if (((byte)tag) == ((byte)UNKNOWN.targetTypeValue))
jjg@309:                 return true;
jjg@309: 
jjg@309:             return (tag >= 0 && tag < targets.length);
jjg@309:         }
jjg@309: 
jjg@309:         public static TargetType fromTargetTypeValue(int tag) {
jjg@309:             if (targets == null)
jjg@309:                 targets = buildTargets();
jjg@309: 
jjg@309:             if (((byte)tag) == ((byte)UNKNOWN.targetTypeValue))
jjg@309:                 return UNKNOWN;
jjg@309: 
jjg@309:             if (tag < 0 || tag >= targets.length)
jjg@309:                 throw new IllegalArgumentException("Unknown TargetType: " + tag);
jjg@309:             return targets[tag];
jjg@309:         }
jjg@309:     }
jjg@309: 
jjg@309:     static enum TargetAttribute {
jjg@309:         HasLocation, HasParameter, HasBound;
jjg@309:     }
jjg@309: }