1   package org.apache.bcel.generic;
2   
3   /* ====================================================================
4    * The Apache Software License, Version 1.1
5    *
6    * Copyright (c) 2001 The Apache Software Foundation.  All rights
7    * reserved.
8    *
9    * Redistribution and use in source and binary forms, with or without
10   * modification, are permitted provided that the following conditions
11   * are met:
12   *
13   * 1. Redistributions of source code must retain the above copyright
14   *    notice, this list of conditions and the following disclaimer.
15   *
16   * 2. Redistributions in binary form must reproduce the above copyright
17   *    notice, this list of conditions and the following disclaimer in
18   *    the documentation and/or other materials provided with the
19   *    distribution.
20   *
21   * 3. The end-user documentation included with the redistribution,
22   *    if any, must include the following acknowledgment:
23   *       "This product includes software developed by the
24   *        Apache Software Foundation (http://www.apache.org/)."
25   *    Alternately, this acknowledgment may appear in the software itself,
26   *    if and wherever such third-party acknowledgments normally appear.
27   *
28   * 4. The names "Apache" and "Apache Software Foundation" and
29   *    "Apache BCEL" must not be used to endorse or promote products
30   *    derived from this software without prior written permission. For
31   *    written permission, please contact apache@apache.org.
32   *
33   * 5. Products derived from this software may not be called "Apache",
34   *    "Apache BCEL", nor may "Apache" appear in their name, without
35   *    prior written permission of the Apache Software Foundation.
36   *
37   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48   * SUCH DAMAGE.
49   * ====================================================================
50   *
51   * This software consists of voluntary contributions made by many
52   * individuals on behalf of the Apache Software Foundation.  For more
53   * information on the Apache Software Foundation, please see
54   * <http://www.apache.org/>.
55   */
56  import org.apache.bcel.classfile.*;
57  
58  /***
59   * Super class for InvokeInstruction and FieldInstruction, since they have
60   * some methods in common!
61   *
62   * @version $Id: FieldOrMethod.java,v 1.1.1.1 2001/10/29 20:00:13 jvanzyl Exp $
63   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
64   */
65  public abstract class FieldOrMethod extends CPInstruction implements LoadClass {
66    /***
67     * Empty constructor needed for the Class.newInstance() statement in
68     * Instruction.readInstruction(). Not to be used otherwise.
69     */
70    FieldOrMethod() {}
71  
72    /***
73     * @param index to constant pool
74     */
75    protected FieldOrMethod(short opcode, int index) {
76      super(opcode, index);
77    }
78  
79    /*** @return signature of referenced method/field.
80     */
81    public String getSignature(ConstantPoolGen cpg) {
82      ConstantPool        cp   = cpg.getConstantPool();
83      ConstantCP          cmr  = (ConstantCP)cp.getConstant(index);
84      ConstantNameAndType cnat = (ConstantNameAndType)cp.getConstant(cmr.getNameAndTypeIndex());
85  
86      return ((ConstantUtf8)cp.getConstant(cnat.getSignatureIndex())).getBytes();
87    }
88  
89    /*** @return name of referenced method/field.
90     */
91    public String getName(ConstantPoolGen cpg) {
92      ConstantPool        cp   = cpg.getConstantPool();
93      ConstantCP          cmr  = (ConstantCP)cp.getConstant(index);
94      ConstantNameAndType cnat = (ConstantNameAndType)cp.getConstant(cmr.getNameAndTypeIndex());
95      return ((ConstantUtf8)cp.getConstant(cnat.getNameIndex())).getBytes();
96    }
97  
98    /*** @return name of the referenced class/interface
99     */
100   public String getClassName(ConstantPoolGen cpg) {
101     ConstantPool cp  = cpg.getConstantPool();
102     ConstantCP   cmr = (ConstantCP)cp.getConstant(index);
103     return cp.getConstantString(cmr.getClassIndex(), org.apache.bcel.Constants.CONSTANT_Class).replace('/', '.');
104   }
105 
106   /*** @return type of the referenced class/interface
107    */
108   public ObjectType getClassType(ConstantPoolGen cpg) {
109     return new ObjectType(getClassName(cpg));
110   }
111 
112   /*** @return type of the referenced class/interface
113    */
114   public ObjectType getLoadClassType(ConstantPoolGen cpg) {
115     return getClassType(cpg);
116   }
117 }
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