Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright 2007-2009 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;

 /**

  * See JVMS3, section 4.8.16.

  *

  *  <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 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 JVMS3, 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();

         }

         @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();

         }

         @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();

         }

         @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);

         }

         @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);

         }

         @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 int length() {

             return 2 + value.length();

         }

         public final int element_name_index;

         public final element_value value;

     }

 }