1 /*

     2  * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package com.sun.tools.classfile;

    27 

    28 import java.io.IOException;

    29 

    30 /**

    31  * See JVMS, section 4.8.12.

    32  *

    33  *  <p><b>This is NOT part of any supported API.

    34  *  If you write code that depends on this, you do so at your own risk.

    35  *  This code and its internal interfaces are subject to change or

    36  *  deletion without notice.</b>

    37  */

    38 public class LineNumberTable_attribute extends Attribute {

    39     LineNumberTable_attribute(ClassReader cr, int name_index, int length) throws IOException {

    40         super(name_index, length);

    41         line_number_table_length = cr.readUnsignedShort();

    42         line_number_table = new Entry[line_number_table_length];

    43         for (int i = 0; i < line_number_table_length; i++)

    44             line_number_table[i] = new Entry(cr);

    45     }

    46 

    47     public LineNumberTable_attribute(ConstantPool constant_pool, Entry[] line_number_table)

    48             throws ConstantPoolException {

    49         this(constant_pool.getUTF8Index(Attribute.LineNumberTable), line_number_table);

    50     }

    51 

    52     public LineNumberTable_attribute(int name_index, Entry[] line_number_table) {

    53         super(name_index, 2 + line_number_table.length * Entry.length());

    54         this.line_number_table_length = line_number_table.length;

    55         this.line_number_table = line_number_table;

    56     }

    57 

    58     public <R, D> R accept(Visitor<R, D> visitor, D data) {

    59         return visitor.visitLineNumberTable(this, data);

    60     }

    61 

    62     public final int line_number_table_length;

    63     public final Entry[] line_number_table;

    64 

    65     public static class Entry {

    66         Entry(ClassReader cr) throws IOException {

    67             start_pc = cr.readUnsignedShort();

    68             line_number = cr.readUnsignedShort();

    69         }

    70 

    71         public static int length() {

    72             return 4;

    73         }

    74 

    75         public final int start_pc;

    76         public final int line_number;

    77     }

    78 }