/*
* 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;
}
}