jjg@46: /*
xdono@229:  * Copyright 2007-2009 Sun Microsystems, Inc.  All Rights Reserved.
jjg@46:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jjg@46:  *
jjg@46:  * This code is free software; you can redistribute it and/or modify it
jjg@46:  * under the terms of the GNU General Public License version 2 only, as
jjg@46:  * published by the Free Software Foundation.  Sun designates this
jjg@46:  * particular file as subject to the "Classpath" exception as provided
jjg@46:  * by Sun in the LICENSE file that accompanied this code.
jjg@46:  *
jjg@46:  * This code is distributed in the hope that it will be useful, but WITHOUT
jjg@46:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jjg@46:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jjg@46:  * version 2 for more details (a copy is included in the LICENSE file that
jjg@46:  * accompanied this code).
jjg@46:  *
jjg@46:  * You should have received a copy of the GNU General Public License version
jjg@46:  * 2 along with this work; if not, write to the Free Software Foundation,
jjg@46:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jjg@46:  *
jjg@46:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
jjg@46:  * CA 95054 USA or visit www.sun.com if you need additional information or
jjg@46:  * have any questions.
jjg@46:  */
jjg@46: 
jjg@46: package com.sun.tools.classfile;
jjg@46: 
jjg@46: import java.io.IOException;
jjg@46: 
jjg@46: /**
jjg@46:  * See JVMS3, section 4.8.16.
jjg@46:  *
jjg@46:  *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
jjg@46:  *  you write code that depends on this, you do so at your own risk.
jjg@46:  *  This code and its internal interfaces are subject to change or
jjg@46:  *  deletion without notice.</b>
jjg@46:  */
jjg@46: public class Annotation {
jjg@46:     static class InvalidAnnotation extends AttributeException {
jjg@198:         private static final long serialVersionUID = -4620480740735772708L;
jjg@46:         InvalidAnnotation(String msg) {
jjg@46:             super(msg);
jjg@46:         }
jjg@46:     }
jjg@46: 
jjg@46:     Annotation(ClassReader cr) throws IOException, InvalidAnnotation {
jjg@46:         type_index = cr.readUnsignedShort();
jjg@46:         num_element_value_pairs = cr.readUnsignedShort();
jjg@46:         element_value_pairs = new element_value_pair[num_element_value_pairs];
jjg@46:         for (int i = 0; i < element_value_pairs.length; i++)
jjg@46:             element_value_pairs[i] = new element_value_pair(cr);
jjg@46:     }
jjg@46: 
jjg@46:     public Annotation(ConstantPool constant_pool,
jjg@46:             int type_index,
jjg@46:             element_value_pair[] element_value_pairs) {
jjg@46:         this.type_index = type_index;
jjg@46:         num_element_value_pairs = element_value_pairs.length;
jjg@46:         this.element_value_pairs = element_value_pairs;
jjg@46:     }
jjg@46: 
jjg@46:     public int length() {
jjg@46:         int n = 2 /*type_index*/ + 2 /*num_element_value_pairs*/;
jjg@46:         for (element_value_pair pair: element_value_pairs)
jjg@46:             n += pair.length();
jjg@46:         return n;
jjg@46:     }
jjg@46: 
jjg@46:     public final int type_index;
jjg@46:     public final int num_element_value_pairs;
jjg@46:     public final element_value_pair element_value_pairs[];
jjg@46: 
jjg@46:     /**
jjg@46:      * See JVMS3, section 4.8.16.1.
jjg@46:      */
jjg@46:     public static abstract class element_value {
jjg@46:         public static element_value read(ClassReader cr)
jjg@46:                 throws IOException, InvalidAnnotation {
jjg@46:             int tag = cr.readUnsignedByte();
jjg@46:             switch (tag) {
jjg@46:             case 'B':
jjg@46:             case 'C':
jjg@46:             case 'D':
jjg@46:             case 'F':
jjg@46:             case 'I':
jjg@46:             case 'J':
jjg@46:             case 'S':
jjg@46:             case 'Z':
jjg@46:             case 's':
jjg@46:                 return new Primitive_element_value(cr, tag);
jjg@46: 
jjg@46:             case 'e':
jjg@46:                 return new Enum_element_value(cr, tag);
jjg@46: 
jjg@46:             case 'c':
jjg@46:                 return new Class_element_value(cr, tag);
jjg@46: 
jjg@46:             case '@':
jjg@46:                 return new Annotation_element_value(cr, tag);
jjg@46: 
jjg@46:             case '[':
jjg@46:                 return new Array_element_value(cr, tag);
jjg@46: 
jjg@46:             default:
jjg@46:                 throw new InvalidAnnotation("unrecognized tag: " + tag);
jjg@46:             }
jjg@46:         }
jjg@46: 
jjg@46:         protected element_value(int tag) {
jjg@46:             this.tag = tag;
jjg@46:         }
jjg@46: 
jjg@46:         public abstract int length();
jjg@46: 
jjg@46:         public abstract <R,P> R accept(Visitor<R,P> visitor, P p);
jjg@46: 
jjg@46:         public interface Visitor<R,P> {
jjg@46:             R visitPrimitive(Primitive_element_value ev, P p);
jjg@46:             R visitEnum(Enum_element_value ev, P p);
jjg@46:             R visitClass(Class_element_value ev, P p);
jjg@46:             R visitAnnotation(Annotation_element_value ev, P p);
jjg@46:             R visitArray(Array_element_value ev, P p);
jjg@46:         }
jjg@46: 
jjg@46:         public final int tag;
jjg@46:     }
jjg@46: 
jjg@46:     public static class Primitive_element_value extends element_value {
jjg@46:         Primitive_element_value(ClassReader cr, int tag) throws IOException {
jjg@46:             super(tag);
jjg@46:             const_value_index = cr.readUnsignedShort();
jjg@46:         }
jjg@46: 
jjg@46:         @Override
jjg@46:         public int length() {
jjg@46:             return 2;
jjg@46:         }
jjg@46: 
jjg@46:         public <R,P> R accept(Visitor<R,P> visitor, P p) {
jjg@46:             return visitor.visitPrimitive(this, p);
jjg@46:         }
jjg@46: 
jjg@46:         public final int const_value_index;
jjg@46: 
jjg@46:     }
jjg@46: 
jjg@46:     public static class Enum_element_value extends element_value {
jjg@46:         Enum_element_value(ClassReader cr, int tag) throws IOException {
jjg@46:             super(tag);
jjg@46:             type_name_index = cr.readUnsignedShort();
jjg@46:             const_name_index = cr.readUnsignedShort();
jjg@46:         }
jjg@46: 
jjg@46:         @Override
jjg@46:         public int length() {
jjg@46:             return 4;
jjg@46:         }
jjg@46: 
jjg@46:         public <R,P> R accept(Visitor<R,P> visitor, P p) {
jjg@46:             return visitor.visitEnum(this, p);
jjg@46:         }
jjg@46: 
jjg@46:         public final int type_name_index;
jjg@46:         public final int const_name_index;
jjg@46:     }
jjg@46: 
jjg@46:     public static class Class_element_value extends element_value {
jjg@46:         Class_element_value(ClassReader cr, int tag) throws IOException {
jjg@46:             super(tag);
jjg@46:             class_info_index = cr.readUnsignedShort();
jjg@46:         }
jjg@46: 
jjg@46:         @Override
jjg@46:         public int length() {
jjg@46:             return 2;
jjg@46:         }
jjg@46: 
jjg@46:         public <R,P> R accept(Visitor<R,P> visitor, P p) {
jjg@46:             return visitor.visitClass(this, p);
jjg@46:         }
jjg@46: 
jjg@46:         public final int class_info_index;
jjg@46:     }
jjg@46: 
jjg@46:     public static class Annotation_element_value extends element_value {
jjg@46:         Annotation_element_value(ClassReader cr, int tag)
jjg@46:                 throws IOException, InvalidAnnotation {
jjg@46:             super(tag);
jjg@46:             annotation_value = new Annotation(cr);
jjg@46:         }
jjg@46: 
jjg@46:         @Override
jjg@46:         public int length() {
jjg@46:             return annotation_value.length();
jjg@46:         }
jjg@46: 
jjg@46:         public <R,P> R accept(Visitor<R,P> visitor, P p) {
jjg@46:             return visitor.visitAnnotation(this, p);
jjg@46:         }
jjg@46: 
jjg@46:         public final Annotation annotation_value;
jjg@46:     }
jjg@46: 
jjg@46:     public static class Array_element_value extends element_value {
jjg@46:         Array_element_value(ClassReader cr, int tag)
jjg@46:                 throws IOException, InvalidAnnotation {
jjg@46:             super(tag);
jjg@46:             num_values = cr.readUnsignedShort();
jjg@46:             values = new element_value[num_values];
jjg@46:             for (int i = 0; i < values.length; i++)
jjg@46:                 values[i] = element_value.read(cr);
jjg@46:         }
jjg@46: 
jjg@46:         @Override
jjg@46:         public int length() {
jjg@46:             int n = 2;
jjg@46:             for (int i = 0; i < values.length; i++)
jjg@46:                 n += values[i].length();
jjg@46:             return n;
jjg@46:         }
jjg@46: 
jjg@46:         public <R,P> R accept(Visitor<R,P> visitor, P p) {
jjg@46:             return visitor.visitArray(this, p);
jjg@46:         }
jjg@46: 
jjg@46:         public final int num_values;
jjg@46:         public final element_value[] values;
jjg@46:     }
jjg@46: 
jjg@46:     public static class element_value_pair {
jjg@46:         element_value_pair(ClassReader cr)
jjg@46:                 throws IOException, InvalidAnnotation {
jjg@46:             element_name_index = cr.readUnsignedShort();
jjg@46:             value = element_value.read(cr);
jjg@46:         }
jjg@46: 
jjg@46:         public int length() {
jjg@46:             return 2 + value.length();
jjg@46:         }
jjg@46: 
jjg@46:         public final int element_name_index;
jjg@46:         public final element_value value;
jjg@46:     }
jjg@46: }