jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/classfile/Annotation.java@eff38cc97183 (annotated)

src/share/classes/com/sun/tools/classfile/Annotation.java@eff38cc97183 (annotated)

src/share/classes/com/sun/tools/classfile/Annotation.java

Tue, 16 Sep 2008 18:35:18 -0700

author: jjg
date: Tue, 16 Sep 2008 18:35:18 -0700
changeset 113: eff38cc97183
parent 54: eaf608c64fec
child 198: b4b1f7732289
permissions: -rw-r--r--

6574134: Allow for alternative implementation of Name Table with garbage collection of name bytes
Reviewed-by: darcy, mcimadamore

 /*
  * Copyright 2007-2008 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 {
         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;
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/classfile/Annotation.java@eff38cc97183 (annotated)

src/share/classes/com/sun/tools/classfile/Annotation.java