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1   /*
2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   package com.sun.org.apache.bcel.internal.generic;
6   
7   /* ====================================================================
8    * The Apache Software License, Version 1.1
9    *
10   * Copyright (c) 2001 The Apache Software Foundation.  All rights
11   * reserved.
12   *
13   * Redistribution and use in source and binary forms, with or without
14   * modification, are permitted provided that the following conditions
15   * are met:
16   *
17   * 1. Redistributions of source code must retain the above copyright
18   *    notice, this list of conditions and the following disclaimer.
19   *
20   * 2. Redistributions in binary form must reproduce the above copyright
21   *    notice, this list of conditions and the following disclaimer in
22   *    the documentation and/or other materials provided with the
23   *    distribution.
24   *
25   * 3. The end-user documentation included with the redistribution,
26   *    if any, must include the following acknowledgment:
27   *       "This product includes software developed by the
28   *        Apache Software Foundation (http://www.apache.org/)."
29   *    Alternately, this acknowledgment may appear in the software itself,
30   *    if and wherever such third-party acknowledgments normally appear.
31   *
32   * 4. The names "Apache" and "Apache Software Foundation" and
33   *    "Apache BCEL" must not be used to endorse or promote products
34   *    derived from this software without prior written permission. For
35   *    written permission, please contact apache@apache.org.
36   *
37   * 5. Products derived from this software may not be called "Apache",
38   *    "Apache BCEL", nor may "Apache" appear in their name, without
39   *    prior written permission of the Apache Software Foundation.
40   *
41   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52   * SUCH DAMAGE.
53   * ====================================================================
54   *
55   * This software consists of voluntary contributions made by many
56   * individuals on behalf of the Apache Software Foundation.  For more
57   * information on the Apache Software Foundation, please see
58   * <http://www.apache.org/>.
59   */
60  import com.sun.org.apache.bcel.internal.classfile.*;
61  
62  /**
63   * Super class for InvokeInstruction and FieldInstruction, since they have
64   * some methods in common!
65   *
66   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
67   */
68  public abstract class FieldOrMethod extends CPInstruction implements LoadClass {
69    /**
70     * Empty constructor needed for the Class.newInstance() statement in
71     * Instruction.readInstruction(). Not to be used otherwise.
72     */
73    FieldOrMethod() {}
74  
75    /**
76     * @param index to constant pool
77     */
78    protected FieldOrMethod(short opcode, int index) {
79      super(opcode, index);
80    }
81  
82    /** @return signature of referenced method/field.
83     */
84    public String getSignature(ConstantPoolGen cpg) {
85      ConstantPool        cp   = cpg.getConstantPool();
86      ConstantCP          cmr  = (ConstantCP)cp.getConstant(index);
87      ConstantNameAndType cnat = (ConstantNameAndType)cp.getConstant(cmr.getNameAndTypeIndex());
88  
89      return ((ConstantUtf8)cp.getConstant(cnat.getSignatureIndex())).getBytes();
90    }
91  
92    /** @return name of referenced method/field.
93     */
94    public String getName(ConstantPoolGen cpg) {
95      ConstantPool        cp   = cpg.getConstantPool();
96      ConstantCP          cmr  = (ConstantCP)cp.getConstant(index);
97      ConstantNameAndType cnat = (ConstantNameAndType)cp.getConstant(cmr.getNameAndTypeIndex());
98      return ((ConstantUtf8)cp.getConstant(cnat.getNameIndex())).getBytes();
99    }
100 
101   /** @return name of the referenced class/interface
102    */
103   public String getClassName(ConstantPoolGen cpg) {
104     ConstantPool cp  = cpg.getConstantPool();
105     ConstantCP   cmr = (ConstantCP)cp.getConstant(index);
106     return cp.getConstantString(cmr.getClassIndex(), com.sun.org.apache.bcel.internal.Constants.CONSTANT_Class).replace('/', '.');
107   }
108 
109   /** @return type of the referenced class/interface
110    */
111   public ObjectType getClassType(ConstantPoolGen cpg) {
112     return new ObjectType(getClassName(cpg));
113   }
114 
115   /** @return type of the referenced class/interface
116    */
117   public ObjectType getLoadClassType(ConstantPoolGen cpg) {
118     return getClassType(cpg);
119   }
120 }