| /* |
| * Copyright (c) 2007, 2009, 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.classfile; |
| |
| import java.io.IOException; |
| |
| /** |
| * See JVMS, section 4.8.16. |
| * |
| * <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> |
| */ |
| public class Annotation { |
| static class InvalidAnnotation extends AttributeException { |
| private static final long serialVersionUID = -4620480740735772708L; |
| InvalidAnnotation(String msg) { |
| super(msg); |
| } |
| } |
| |
| Annotation(ClassReader cr) throws IOException, InvalidAnnotation { |
| type_index = cr.readUnsignedShort(); |
| num_element_value_pairs = cr.readUnsignedShort(); |
| element_value_pairs = new element_value_pair[num_element_value_pairs]; |
| for (int i = 0; i < element_value_pairs.length; i++) |
| element_value_pairs[i] = new element_value_pair(cr); |
| } |
| |
| public Annotation(ConstantPool constant_pool, |
| int type_index, |
| element_value_pair[] element_value_pairs) { |
| this.type_index = type_index; |
| num_element_value_pairs = element_value_pairs.length; |
| this.element_value_pairs = element_value_pairs; |
| } |
| |
| public int length() { |
| int n = 2 /*type_index*/ + 2 /*num_element_value_pairs*/; |
| for (element_value_pair pair: element_value_pairs) |
| n += pair.length(); |
| return n; |
| } |
| |
| public final int type_index; |
| public final int num_element_value_pairs; |
| public final element_value_pair element_value_pairs[]; |
| |
| /** |
| * See JVMS, section 4.8.16.1. |
| */ |
| public static abstract class element_value { |
| public static element_value read(ClassReader cr) |
| throws IOException, InvalidAnnotation { |
| int tag = cr.readUnsignedByte(); |
| switch (tag) { |
| case 'B': |
| case 'C': |
| case 'D': |
| case 'F': |
| case 'I': |
| case 'J': |
| case 'S': |
| case 'Z': |
| case 's': |
| return new Primitive_element_value(cr, tag); |
| |
| case 'e': |
| return new Enum_element_value(cr, tag); |
| |
| case 'c': |
| return new Class_element_value(cr, tag); |
| |
| case '@': |
| return new Annotation_element_value(cr, tag); |
| |
| case '[': |
| return new Array_element_value(cr, tag); |
| |
| default: |
| throw new InvalidAnnotation("unrecognized tag: " + tag); |
| } |
| } |
| |
| protected element_value(int tag) { |
| this.tag = tag; |
| } |
| |
| public abstract int length(); |
| |
| public abstract <R,P> R accept(Visitor<R,P> visitor, P p); |
| |
| public interface Visitor<R,P> { |
| R visitPrimitive(Primitive_element_value ev, P p); |
| R visitEnum(Enum_element_value ev, P p); |
| R visitClass(Class_element_value ev, P p); |
| R visitAnnotation(Annotation_element_value ev, P p); |
| R visitArray(Array_element_value ev, P p); |
| } |
| |
| public final int tag; |
| } |
| |
| public static class Primitive_element_value extends element_value { |
| Primitive_element_value(ClassReader cr, int tag) throws IOException { |
| super(tag); |
| const_value_index = cr.readUnsignedShort(); |
| } |
| |
| public Primitive_element_value(int const_value_index, int tag) { |
| super(tag); |
| this.const_value_index = const_value_index; |
| } |
| |
| @Override |
| public int length() { |
| return 2; |
| } |
| |
| public <R,P> R accept(Visitor<R,P> visitor, P p) { |
| return visitor.visitPrimitive(this, p); |
| } |
| |
| public final int const_value_index; |
| |
| } |
| |
| public static class Enum_element_value extends element_value { |
| Enum_element_value(ClassReader cr, int tag) throws IOException { |
| super(tag); |
| type_name_index = cr.readUnsignedShort(); |
| const_name_index = cr.readUnsignedShort(); |
| } |
| |
| public Enum_element_value(int type_name_index, int const_name_index, int tag) { |
| super(tag); |
| this.type_name_index = type_name_index; |
| this.const_name_index = const_name_index; |
| } |
| |
| @Override |
| public int length() { |
| return 4; |
| } |
| |
| public <R,P> R accept(Visitor<R,P> visitor, P p) { |
| return visitor.visitEnum(this, p); |
| } |
| |
| public final int type_name_index; |
| public final int const_name_index; |
| } |
| |
| public static class Class_element_value extends element_value { |
| Class_element_value(ClassReader cr, int tag) throws IOException { |
| super(tag); |
| class_info_index = cr.readUnsignedShort(); |
| } |
| |
| public Class_element_value(int class_info_index, int tag) { |
| super(tag); |
| this.class_info_index = class_info_index; |
| } |
| |
| @Override |
| public int length() { |
| return 2; |
| } |
| |
| public <R,P> R accept(Visitor<R,P> visitor, P p) { |
| return visitor.visitClass(this, p); |
| } |
| |
| public final int class_info_index; |
| } |
| |
| public static class Annotation_element_value extends element_value { |
| Annotation_element_value(ClassReader cr, int tag) |
| throws IOException, InvalidAnnotation { |
| super(tag); |
| annotation_value = new Annotation(cr); |
| } |
| |
| public Annotation_element_value(Annotation annotation_value, int tag) { |
| super(tag); |
| this.annotation_value = annotation_value; |
| } |
| |
| @Override |
| public int length() { |
| return annotation_value.length(); |
| } |
| |
| public <R,P> R accept(Visitor<R,P> visitor, P p) { |
| return visitor.visitAnnotation(this, p); |
| } |
| |
| public final Annotation annotation_value; |
| } |
| |
| public static class Array_element_value extends element_value { |
| Array_element_value(ClassReader cr, int tag) |
| throws IOException, InvalidAnnotation { |
| super(tag); |
| num_values = cr.readUnsignedShort(); |
| values = new element_value[num_values]; |
| for (int i = 0; i < values.length; i++) |
| values[i] = element_value.read(cr); |
| } |
| |
| public Array_element_value(element_value[] values, int tag) { |
| super(tag); |
| this.num_values = values.length; |
| this.values = values; |
| } |
| |
| @Override |
| public int length() { |
| int n = 2; |
| for (int i = 0; i < values.length; i++) |
| n += values[i].length(); |
| return n; |
| } |
| |
| public <R,P> R accept(Visitor<R,P> visitor, P p) { |
| return visitor.visitArray(this, p); |
| } |
| |
| public final int num_values; |
| public final element_value[] values; |
| } |
| |
| public static class element_value_pair { |
| element_value_pair(ClassReader cr) |
| throws IOException, InvalidAnnotation { |
| element_name_index = cr.readUnsignedShort(); |
| value = element_value.read(cr); |
| } |
| |
| public element_value_pair(int element_name_index, element_value value) { |
| this.element_name_index = element_name_index; |
| this.value = value; |
| } |
| |
| public int length() { |
| return 2 + value.length(); |
| } |
| |
| public final int element_name_index; |
| public final element_value value; |
| } |
| } |