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Java > Open Source Codes > com > caucho > bytecode > FieldRefConstant


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.bytecode;
30
31 import com.caucho.log.Log;
32
33 import java.io.IOException JavaDoc;
34 import java.util.logging.Logger JavaDoc;
35
36 /**
37  * Represents a field ref in the constant pool.
38  */
39 public class FieldRefConstant extends ConstantPoolEntry {
40   static private final Logger JavaDoc log = Log.open(FieldRefConstant.class);
41
42   private int _classIndex;
43   private int _nameAndTypeIndex;
44
45   /**
46    * Creates a new field ref constant.
47    */
48   FieldRefConstant(ConstantPool pool, int index,
49            int classIndex, int nameAndTypeIndex)
50   {
51     super(pool, index);
52
53     _classIndex = classIndex;
54     _nameAndTypeIndex = nameAndTypeIndex;
55   }
56
57   /**
58    * Returns the class index.
59    */
60   public int getClassIndex()
61   {
62     return _classIndex;
63   }
64
65   /**
66    * Sets the class index.
67    */
68   public void setClassIndex(int index)
69   {
70     _classIndex = index;
71   }
72
73   /**
74    * Returns the class name
75    */
76   public String JavaDoc getClassName()
77   {
78     return getConstantPool().getClass(_classIndex).getName();
79   }
80
81   /**
82    * Returns the field name
83    */
84   public String JavaDoc getName()
85   {
86     return getConstantPool().getNameAndType(_nameAndTypeIndex).getName();
87   }
88
89   /**
90    * Returns the method type
91    */
92   public String JavaDoc getType()
93   {
94     return getConstantPool().getNameAndType(_nameAndTypeIndex).getType();
95   }
96
97   /**
98    * Writes the contents of the pool entry.
99    */
100   void write(ByteCodeWriter out)
101     throws IOException JavaDoc
102   {
103     out.write(ConstantPool.CP_FIELD_REF);
104     out.writeShort(_classIndex);
105     out.writeShort(_nameAndTypeIndex);
106   }
107
108   /**
109    * Sets the method name and type
110    */
111   public void setNameAndType(String JavaDoc name, String JavaDoc type)
112   {
113     _nameAndTypeIndex = getConstantPool().addNameAndType(name, type).getIndex();
114   }
115
116   /**
117    * Exports to the target pool.
118    */
119   public int export(ConstantPool target)
120   {
121     return target.addFieldRef(getClassName(), getName(), getType()).getIndex();
122   }
123
124   public String JavaDoc toString()
125   {
126     return "FieldRefConstant[" + getClassName() + "." + getName() + "(" + getType() + ")]";
127   }
128 }
129
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