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Java > Open Source Codes > com > go > trove > classfile > ConstantMethodInfo


1 /* ====================================================================
2  * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
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52
53 package com.go.trove.classfile;
54
55 import java.io.*;
56
57 /******************************************************************************
58  * This class corresponds to the CONSTANT_Methodref_info structure as defined
59  * in section 4.4.2 of <i>The Java Virtual Machine Specification</i>.
60  *
61  * @author Brian S O'Neill
62  * @version
63  * <!--$$Revision:--> 21 <!-- $-->, <!--$$JustDate:--> 9/07/00 <!-- $-->
64  */

65 public class ConstantMethodInfo extends ConstantInfo {
66     private ConstantClassInfo mParentClass;
67     private ConstantNameAndTypeInfo mNameAndType;
68     
69     /**
70      * Will return either a new ConstantMethodInfo object or one already in
71      * the constant pool. If it is a new ConstantMethodInfo, it will be
72      * inserted into the pool.
73      */

74     static ConstantMethodInfo make(ConstantPool cp,
75                                    ConstantClassInfo parentClass,
76                                    ConstantNameAndTypeInfo nameAndType) {
77
78         ConstantInfo ci = new ConstantMethodInfo(parentClass, nameAndType);
79         return (ConstantMethodInfo)cp.addConstant(ci);
80     }
81
82     ConstantMethodInfo(ConstantClassInfo parentClass,
83                        ConstantNameAndTypeInfo nameAndType) {
84         super(TAG_METHOD);
85         
86         mParentClass = parentClass;
87         mNameAndType = nameAndType;
88     }
89
90     public ConstantClassInfo getParentClass() {
91         return mParentClass;
92     }
93     
94     public ConstantNameAndTypeInfo getNameAndType() {
95         return mNameAndType;
96     }
97
98     public int hashCode() {
99         return mNameAndType.hashCode();
100     }
101     
102     public boolean equals(Object JavaDoc obj) {
103         if (obj instanceof ConstantMethodInfo) {
104             ConstantMethodInfo other = (ConstantMethodInfo)obj;
105             return (mParentClass.equals(other.mParentClass) &&
106                     mNameAndType.equals(other.mNameAndType));
107         }
108         
109         return false;
110     }
111     
112     public void writeTo(DataOutput dout) throws IOException {
113         super.writeTo(dout);
114         dout.writeShort(mParentClass.getIndex());
115         dout.writeShort(mNameAndType.getIndex());
116     }
117
118     public String JavaDoc toString() {
119         StringBuffer JavaDoc buf = new StringBuffer JavaDoc("CONSTANT_Methodref_info: ");
120
121         ConstantClassInfo parent = getParentClass();
122
123         buf.append(parent.getClassName());
124         for (int i = parent.getDimensions(); i > 0; i--) {
125             buf.append('[');
126             buf.append(']');
127         }
128
129         ConstantNameAndTypeInfo cnati = getNameAndType();
130
131         buf.append(' ');
132         buf.append(cnati.getName());
133         buf.append(' ');
134         buf.append(cnati.getType());
135
136         return buf.toString();
137     }
138 }
139
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