| /* |
| * Copyright 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.classfile; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.EnumSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import static com.sun.tools.classfile.ExtendedAnnotation.TargetAttribute.*; |
| |
| /** |
| * See JSR 308 specification, section 4.1 |
| * |
| * <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 class ExtendedAnnotation { |
| ExtendedAnnotation(ClassReader cr) throws IOException, Annotation.InvalidAnnotation { |
| annotation = new Annotation(cr); |
| position = read_position(cr); |
| } |
| |
| public ExtendedAnnotation(ConstantPool constant_pool, |
| Annotation annotation, Position position) { |
| this.annotation = annotation; |
| this.position = position; |
| } |
| |
| public int length() { |
| int n = annotation.length(); |
| n += position_length(position); |
| return n; |
| } |
| |
| public final Annotation annotation; |
| public final Position position; |
| |
| private static Position read_position(ClassReader cr) throws IOException, Annotation.InvalidAnnotation { |
| // Copied from ClassReader |
| int tag = (byte)cr.readUnsignedByte(); // cast to introduce signedness |
| if (!TargetType.isValidTargetTypeValue(tag)) |
| throw new Annotation.InvalidAnnotation("invalid type annotation target type value: " + tag); |
| |
| TargetType type = TargetType.fromTargetTypeValue(tag); |
| |
| Position position = new Position(); |
| position.type = type; |
| |
| switch (type) { |
| // type case |
| case TYPECAST: |
| case TYPECAST_GENERIC_OR_ARRAY: |
| // object creation |
| case INSTANCEOF: |
| case INSTANCEOF_GENERIC_OR_ARRAY: |
| // new expression |
| case NEW: |
| case NEW_GENERIC_OR_ARRAY: |
| position.offset = cr.readUnsignedShort(); |
| break; |
| // local variable |
| case LOCAL_VARIABLE: |
| case LOCAL_VARIABLE_GENERIC_OR_ARRAY: |
| int table_length = cr.readUnsignedShort(); |
| position.lvarOffset = new int[table_length]; |
| position.lvarLength = new int[table_length]; |
| position.lvarIndex = new int[table_length]; |
| for (int i = 0; i < table_length; ++i) { |
| position.lvarOffset[i] = cr.readUnsignedShort(); |
| position.lvarLength[i] = cr.readUnsignedShort(); |
| position.lvarIndex[i] = cr.readUnsignedShort(); |
| } |
| break; |
| // method receiver |
| case METHOD_RECEIVER: |
| // Do nothing |
| break; |
| // type parameters |
| case CLASS_TYPE_PARAMETER: |
| case METHOD_TYPE_PARAMETER: |
| position.parameter_index = cr.readUnsignedByte(); |
| break; |
| // type parameter bounds |
| case CLASS_TYPE_PARAMETER_BOUND: |
| case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY: |
| case METHOD_TYPE_PARAMETER_BOUND: |
| case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY: |
| position.parameter_index = cr.readUnsignedByte(); |
| position.bound_index = cr.readUnsignedByte(); |
| break; |
| // wildcards |
| case WILDCARD_BOUND: |
| case WILDCARD_BOUND_GENERIC_OR_ARRAY: |
| position.wildcard_position = read_position(cr); |
| break; |
| // Class extends and implements clauses |
| case CLASS_EXTENDS: |
| case CLASS_EXTENDS_GENERIC_OR_ARRAY: |
| position.type_index = cr.readUnsignedByte(); |
| break; |
| // throws |
| case THROWS: |
| position.type_index = cr.readUnsignedByte(); |
| break; |
| case CLASS_LITERAL: |
| case CLASS_LITERAL_GENERIC_OR_ARRAY: |
| position.offset = cr.readUnsignedShort(); |
| break; |
| // method parameter: not specified |
| case METHOD_PARAMETER_GENERIC_OR_ARRAY: |
| position.parameter_index = cr.readUnsignedByte(); |
| break; |
| // method type argument: wasn't specified |
| case NEW_TYPE_ARGUMENT: |
| case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY: |
| case METHOD_TYPE_ARGUMENT: |
| case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY: |
| position.offset = cr.readUnsignedShort(); |
| position.type_index = cr.readUnsignedByte(); |
| break; |
| // We don't need to worry abut these |
| case METHOD_RETURN_GENERIC_OR_ARRAY: |
| case FIELD_GENERIC_OR_ARRAY: |
| break; |
| case UNKNOWN: |
| break; |
| default: |
| throw new AssertionError("Cannot be here"); |
| } |
| |
| if (type.hasLocation()) { |
| int len = cr.readUnsignedShort(); |
| List<Integer> loc = new ArrayList<Integer>(len); |
| for (int i = 0; i < len; i++) |
| loc.add(cr.readUnsignedByte()); |
| position.location = loc; |
| } |
| return position; |
| } |
| |
| private static int position_length(Position pos) { |
| int n = 0; |
| n += 1; // target_type |
| switch (pos.type) { |
| // type case |
| case TYPECAST: |
| case TYPECAST_GENERIC_OR_ARRAY: |
| // object creation |
| case INSTANCEOF: |
| case INSTANCEOF_GENERIC_OR_ARRAY: |
| // new expression |
| case NEW: |
| case NEW_GENERIC_OR_ARRAY: |
| n += 2; |
| break; |
| // local variable |
| case LOCAL_VARIABLE: |
| case LOCAL_VARIABLE_GENERIC_OR_ARRAY: |
| n += 2; // table_length; |
| int table_length = pos.lvarOffset.length; |
| n += 2 * table_length; // offset |
| n += 2 * table_length; // length; |
| n += 2 * table_length; // index |
| break; |
| // method receiver |
| case METHOD_RECEIVER: |
| // Do nothing |
| break; |
| // type parameters |
| case CLASS_TYPE_PARAMETER: |
| case METHOD_TYPE_PARAMETER: |
| n += 1; // parameter_index; |
| break; |
| // type parameter bounds |
| case CLASS_TYPE_PARAMETER_BOUND: |
| case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY: |
| case METHOD_TYPE_PARAMETER_BOUND: |
| case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY: |
| n += 1; // parameter_index |
| n += 1; // bound_index |
| break; |
| case WILDCARD_BOUND: |
| case WILDCARD_BOUND_GENERIC_OR_ARRAY: |
| n += position_length(pos.wildcard_position); |
| break; |
| // Class extends and implements clauses |
| case CLASS_EXTENDS: |
| case CLASS_EXTENDS_GENERIC_OR_ARRAY: |
| n += 1; // type_index |
| break; |
| // throws |
| case THROWS: |
| n += 1; // type_index |
| break; |
| case CLASS_LITERAL: |
| case CLASS_LITERAL_GENERIC_OR_ARRAY: |
| n += 1; // offset |
| break; |
| // method parameter: not specified |
| case METHOD_PARAMETER_GENERIC_OR_ARRAY: |
| n += 1; // parameter_index |
| break; |
| // method type argument: wasn't specified |
| case NEW_TYPE_ARGUMENT: |
| case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY: |
| case METHOD_TYPE_ARGUMENT: |
| case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY: |
| n += 2; // offset |
| n += 1; // type index |
| break; |
| // We don't need to worry abut these |
| case METHOD_RETURN_GENERIC_OR_ARRAY: |
| case FIELD_GENERIC_OR_ARRAY: |
| break; |
| case UNKNOWN: |
| break; |
| default: |
| } |
| |
| if (pos.type.hasLocation()) { |
| n += 2; // length |
| n += 1 * pos.location.size(); // actual array size |
| } |
| |
| return n; |
| } |
| |
| // Code duplicated from com.sun.tools.javac.code.TypeAnnotations.Position |
| public static class Position { |
| |
| public TargetType type = TargetType.UNKNOWN; |
| |
| // For generic/array types. |
| public List<Integer> location = new ArrayList<Integer>(); |
| |
| // For typecasts, type tests, new (and locals, as start_pc). |
| public int offset = -1; |
| |
| // For locals. |
| public int[] lvarOffset = new int[] { -1 }; |
| public int[] lvarLength = new int[] { -1 }; |
| public int[] lvarIndex = new int[] { -1 }; |
| |
| // For type parameter bound |
| public int bound_index = -1; |
| |
| // For type parameter and method parameter |
| public int parameter_index = -1; |
| |
| // For class extends, implements, and throws classes |
| public int type_index = -2; |
| |
| // For wildcards |
| public Position wildcard_position = null; |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append('['); |
| sb.append(type); |
| |
| switch (type) { |
| // type case |
| case TYPECAST: |
| case TYPECAST_GENERIC_OR_ARRAY: |
| // object creation |
| case INSTANCEOF: |
| case INSTANCEOF_GENERIC_OR_ARRAY: |
| // new expression |
| case NEW: |
| case NEW_GENERIC_OR_ARRAY: |
| case NEW_TYPE_ARGUMENT: |
| case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY: |
| sb.append(", offset = "); |
| sb.append(offset); |
| break; |
| // local variable |
| case LOCAL_VARIABLE: |
| case LOCAL_VARIABLE_GENERIC_OR_ARRAY: |
| sb.append(", {"); |
| for (int i = 0; i < lvarOffset.length; ++i) { |
| if (i != 0) sb.append("; "); |
| sb.append(", start_pc = "); |
| sb.append(lvarOffset[i]); |
| sb.append(", length = "); |
| sb.append(lvarLength[i]); |
| sb.append(", index = "); |
| sb.append(lvarIndex[i]); |
| } |
| sb.append("}"); |
| break; |
| // method receiver |
| case METHOD_RECEIVER: |
| // Do nothing |
| break; |
| // type parameters |
| case CLASS_TYPE_PARAMETER: |
| case METHOD_TYPE_PARAMETER: |
| sb.append(", param_index = "); |
| sb.append(parameter_index); |
| break; |
| // type parameters bound |
| case CLASS_TYPE_PARAMETER_BOUND: |
| case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY: |
| case METHOD_TYPE_PARAMETER_BOUND: |
| case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY: |
| sb.append(", param_index = "); |
| sb.append(parameter_index); |
| sb.append(", bound_index = "); |
| sb.append(bound_index); |
| break; |
| // wildcard |
| case WILDCARD_BOUND: |
| case WILDCARD_BOUND_GENERIC_OR_ARRAY: |
| sb.append(", wild_card = "); |
| sb.append(wildcard_position); |
| break; |
| // Class extends and implements clauses |
| case CLASS_EXTENDS: |
| case CLASS_EXTENDS_GENERIC_OR_ARRAY: |
| sb.append(", type_index = "); |
| sb.append(type_index); |
| break; |
| // throws |
| case THROWS: |
| sb.append(", type_index = "); |
| sb.append(type_index); |
| break; |
| case CLASS_LITERAL: |
| case CLASS_LITERAL_GENERIC_OR_ARRAY: |
| sb.append(", offset = "); |
| sb.append(offset); |
| break; |
| // method parameter: not specified |
| case METHOD_PARAMETER_GENERIC_OR_ARRAY: |
| sb.append(", param_index = "); |
| sb.append(parameter_index); |
| break; |
| // method type argument: wasn't specified |
| case METHOD_TYPE_ARGUMENT: |
| case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY: |
| sb.append(", offset = "); |
| sb.append(offset); |
| sb.append(", type_index = "); |
| sb.append(type_index); |
| break; |
| // We don't need to worry abut these |
| case METHOD_RETURN_GENERIC_OR_ARRAY: |
| case FIELD_GENERIC_OR_ARRAY: |
| break; |
| case UNKNOWN: |
| break; |
| default: |
| throw new AssertionError("unknown type: " + type); |
| } |
| |
| // Append location data for generics/arrays. |
| if (type.hasLocation()) { |
| sb.append(", location = ("); |
| sb.append(location); |
| sb.append(")"); |
| } |
| |
| sb.append(']'); |
| return sb.toString(); |
| } |
| } |
| |
| // Code duplicated from com.sun.tools.javac.comp.TargetType |
| public enum TargetType { |
| |
| /** 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 |
| // 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), |
| |
| // already handled by regular annotations |
| // METHOD_RETURN(0x0A), |
| |
| /** |
| * For annotations on a type argument or nested array of a method return |
| * type. |
| */ |
| METHOD_RETURN_GENERIC_OR_ARRAY(0x0B, HasLocation), |
| |
| // already handled by regular annotations |
| // METHOD_PARAMETER(0x0C), |
| |
| /** For annotations on a type argument or nested array of a method parameter. */ |
| METHOD_PARAMETER_GENERIC_OR_ARRAY(0x0D, HasLocation), |
| |
| // already handled by regular annotations |
| // 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 |
| // 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 |
| // METHOD_TYPE_PARAMETER_GENERIC_OR_ARRAY(0x21, HasLocation, HasParameter), |
| |
| CLASS_TYPE_PARAMETER(0x22, HasParameter), |
| |
| // invalid location |
| // 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... attrs) { |
| 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; |
| this.flags = EnumSet.noneOf(TargetAttribute.class); |
| for (TargetAttribute attr : attrs) |
| this.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; |
| } |
| } |