1 cananian 1.6.2.2 // HMethodSyn.java, created Fri Oct 16 2:21:03 1998 by cananian
2 cananian 1.1 // Copyright (C) 1998 C. Scott Ananian <cananian@alumni.princeton.edu>
3 cananian 1.1 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 cananian 1.1 package harpoon.ClassFile;
5 cananian 1.1
6 cananian 1.6.2.6 import harpoon.Util.Util;
7 cananian 1.6.2.6
8 cananian 1.1 import java.lang.reflect.Modifier;
9 cananian 1.6 import java.util.Enumeration;
10 cananian 1.1 import java.util.Hashtable;
11 cananian 1.1 import java.util.Vector;
12 cananian 1.1 /**
13 cananian 1.1 * An <code>HMethodSyn</code> provides information about, and access to, a
14 cananian 1.1 * single method on a class or interface. The reflected method
15 cananian 1.1 * may be a class method or an instance method (including an abstract
16 cananian 1.1 * method).
17 cananian 1.1 *
18 cananian 1.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
19 cananian 1.9 * @version $Id: HMethodSyn.java,v 1.9 2002/04/10 03:04:15 cananian Exp $
20 cananian 1.1 * @see HMember
21 cananian 1.1 * @see HClass
22 cananian 1.1 */
23 cananian 1.6.2.6 class HMethodSyn extends HMethodImpl implements HMethodMutator {
24 cananian 1.1
25 cananian 1.6.2.6 /** Create a new method like the <code>template</code>, but named
26 cananian 1.6.2.6 * <code>name</code>.
27 cananian 1.6 * The new method will be added to class <code>parent</code>. */
28 cananian 1.6.2.6 HMethodSyn(HClassSyn parent, String name, HMethod template) {
29 cananian 1.6.2.11 this ((HClass)parent, name, template);
30 cananian 1.6.2.11 }
31 cananian 1.6.2.11 HMethodSyn(HClassArraySyn parent, String name, HMethod template) {
32 cananian 1.6.2.11 this ((HClass)parent, name, template);
33 cananian 1.6 }
34 cananian 1.6.2.11 // private, not-as-type-safe implementation.
35 cananian 1.6.2.11 private HMethodSyn(HClass parent, String name, HMethod template) {
36 cananian 1.6 this.parent = parent;
37 cananian 1.6.2.6 this.name = name;
38 cananian 1.1 this.modifiers = template.getModifiers();
39 cananian 1.1 this.returnType = template.getReturnType();
40 cananian 1.1 this.parameterTypes = template.getParameterTypes();
41 cananian 1.1 this.parameterNames = template.getParameterNames();
42 cananian 1.1 this.exceptionTypes = template.getExceptionTypes();
43 cananian 1.1 this.isSynthetic = template.isSynthetic();
44 cananian 1.6.2.8 // ensure linker information is consistent.
45 cananian 1.8.2.1 assert checkLinker((HClass)this.returnType);
46 cananian 1.6.2.8 for(int i=0; i<this.parameterTypes.length; i++)
47 cananian 1.8.2.1 assert checkLinker((HClass)this.parameterTypes[i]);
48 cananian 1.6.2.8 for(int i=0; i<this.exceptionTypes.length; i++)
49 cananian 1.8.2.1 assert checkLinker((HClass)this.exceptionTypes[i]);
50 nkushman 1.4 }
51 nkushman 1.4
52 cananian 1.6.2.6 /** Create a new empty method in the specified class
53 nkushman 1.4 * with the specified parameter and return types
54 nkushman 1.4 * that throws no checked exceptions.
55 nkushman 1.4 */
56 cananian 1.6.2.6 HMethodSyn(HClassSyn parent, String name,
57 cananian 1.6 HClass[] paramTypes, HClass returnType) {
58 nkushman 1.4 this(parent, name, makeDescriptor (paramTypes, returnType));
59 nkushman 1.4 }
60 cananian 1.6.2.11 HMethodSyn(HClassArraySyn parent, String name,
61 cananian 1.6 HClass[] paramTypes, HClass returnType) {
62 nkushman 1.4 this(parent, name, makeDescriptor (paramTypes, returnType));
63 nkushman 1.4 }
64 nkushman 1.4
65 cananian 1.6.2.6 /** Create a new empty method in the specified class
66 cananian 1.2 * with the specified descriptor
67 cananian 1.2 * that throws no checked exceptions.
68 cananian 1.1 */
69 cananian 1.6.2.6 HMethodSyn(HClassSyn parent, String name, String descriptor) {
70 cananian 1.6.2.11 this((HClass)parent, name, descriptor);
71 cananian 1.6.2.11 }
72 cananian 1.6.2.11 HMethodSyn(HClassArraySyn parent, String name, String descriptor) {
73 cananian 1.6.2.11 this((HClass)parent, name, descriptor);
74 cananian 1.6.2.11 }
75 cananian 1.6.2.11 // private, not-as-type-safe implementation.
76 cananian 1.6.2.11 private HMethodSyn(HClass parent, String name, String descriptor) {
77 cananian 1.1 this.parent = parent;
78 cananian 1.6.2.6 this.name = name;
79 cananian 1.6.2.6 this.modifiers = 0;
80 cananian 1.2 { // parse descriptor for return type.
81 cananian 1.2 String desc = descriptor.substring(descriptor.lastIndexOf(')')+1);
82 cananian 1.6.2.12 this.returnType = new ClassPointer(parent.getLinker(), desc);
83 cananian 1.2 }
84 cananian 1.2 { // parse descriptor for parameter types.
85 cananian 1.2 String desc = descriptor.substring(1, descriptor.lastIndexOf(')'));
86 cananian 1.2 Vector v = new Vector();
87 cananian 1.2 for (int i=0; i<desc.length(); i++) {
88 cananian 1.6.2.12 int first = i;
89 cananian 1.2 while (desc.charAt(i)=='[') i++;
90 cananian 1.2 if (desc.charAt(i)=='L') i=desc.indexOf(';', i);
91 cananian 1.6.2.12 v.addElement(new ClassPointer(parent.getLinker(),
92 cananian 1.6.2.12 desc.substring(first, i+1)));
93 cananian 1.2 }
94 cananian 1.6.2.12 this.parameterTypes = new HPointer[v.size()];
95 cananian 1.2 v.copyInto(this.parameterTypes);
96 cananian 1.2 }
97 cananian 1.2 this.parameterNames = new String[this.parameterTypes.length];
98 cananian 1.1 this.exceptionTypes = new HClass[0];
99 cananian 1.1 this.isSynthetic = false;
100 cananian 1.1 }
101 cananian 1.1
102 cananian 1.6.2.6 public HMethodMutator getMutator() { return this; }
103 cananian 1.1
104 cananian 1.6.2.6 public void addModifiers(int m) { setModifiers(getModifiers()|m); }
105 cananian 1.6.2.6 public void removeModifiers(int m) { setModifiers(getModifiers()&(~m)); }
106 cananian 1.6.2.6 public void setModifiers(int m) {
107 cananian 1.6.2.6 if (this.modifiers != m) parent.hasBeenModified = true;
108 cananian 1.6.2.6 this.modifiers = m;
109 cananian 1.6.2.6 }
110 cananian 1.1
111 cananian 1.6.2.6 public void setReturnType(HClass returnType) {
112 cananian 1.8.2.1 assert checkLinker(returnType);
113 cananian 1.6.2.6 if (this.returnType != returnType) parent.hasBeenModified = true;
114 cananian 1.6.2.6 this.returnType = returnType;
115 cananian 1.6.2.6 }
116 cananian 1.1
117 cananian 1.2 /** Warning: use can cause method name conflicts in class. */
118 cananian 1.1 public void setParameterTypes(HClass[] parameterTypes) {
119 cananian 1.6.2.8 for (int i=0; i<parameterTypes.length; i++)
120 cananian 1.8.2.1 assert checkLinker(parameterTypes[i]);
121 cananian 1.6.2.6 if (this.parameterTypes.length != parameterTypes.length)
122 cananian 1.6.2.6 parent.hasBeenModified = true;
123 cananian 1.6.2.6 else for (int i=0;
124 cananian 1.6.2.6 i<this.parameterTypes.length && i<parameterTypes.length; i++)
125 cananian 1.6.2.6 if (this.parameterTypes[i] != parameterTypes[i])
126 cananian 1.6.2.6 parent.hasBeenModified = true;
127 cananian 1.1 this.parameterTypes = parameterTypes;
128 cananian 1.1 }
129 cananian 1.2 /** Warning: use can cause method name conflicts in class. */
130 cananian 1.1 public void setParameterType(int which, HClass type) {
131 cananian 1.8.2.1 assert checkLinker(type);
132 cananian 1.6.2.6 if (this.parameterTypes[which] != type)
133 cananian 1.6.2.6 parent.hasBeenModified = true;
134 cananian 1.1 this.parameterTypes[which] = type;
135 cananian 1.1 }
136 cananian 1.1
137 cananian 1.1 public void setParameterNames(String[] parameterNames) {
138 cananian 1.1 this.parameterNames = parameterNames;
139 cananian 1.1 }
140 cananian 1.1 public void setParameterName(int which, String name) {
141 cananian 1.1 this.parameterNames[which] = name;
142 cananian 1.1 }
143 cananian 1.1
144 cananian 1.6.2.6 public void addExceptionType(HClass exceptionType) {
145 cananian 1.8.2.1 assert checkLinker(exceptionType);
146 cananian 1.6.2.6 for (int i=0; i<exceptionTypes.length; i++)
147 cananian 1.6.2.6 if (exceptionTypes[i]==exceptionType)
148 cananian 1.6.2.6 return;
149 cananian 1.6.2.6 this.exceptionTypes = (HPointer[]) Util.grow(HPointer.arrayFactory,
150 cananian 1.6.2.6 exceptionTypes, exceptionType,
151 cananian 1.6.2.6 exceptionTypes.length);
152 cananian 1.6.2.6 parent.hasBeenModified = true;
153 cananian 1.6.2.6 }
154 cananian 1.1 public void setExceptionTypes(HClass[] exceptionTypes) {
155 cananian 1.6.2.8 for (int i=0; i<exceptionTypes.length; i++)
156 cananian 1.8.2.1 assert checkLinker(exceptionTypes[i]);
157 cananian 1.6.2.6 if (this.exceptionTypes.length != exceptionTypes.length)
158 cananian 1.6.2.6 parent.hasBeenModified = true;
159 cananian 1.6.2.6 else for (int i=0;
160 cananian 1.6.2.6 i<this.exceptionTypes.length && i<exceptionTypes.length; i++)
161 cananian 1.6.2.6 if (this.exceptionTypes[i] != exceptionTypes[i])
162 cananian 1.6.2.6 parent.hasBeenModified = true;
163 cananian 1.1 this.exceptionTypes = exceptionTypes;
164 cananian 1.1 }
165 cananian 1.6.2.6 public void removeExceptionType(HClass exceptionType) {
166 cananian 1.8.2.1 assert checkLinker(exceptionType);
167 cananian 1.6.2.6 for (int i=0; i<exceptionTypes.length; i++)
168 cananian 1.6.2.6 if (exceptionTypes[i].actual().equals(exceptionType)) {
169 cananian 1.6.2.6 exceptionTypes = (HPointer[]) Util.shrink(HPointer.arrayFactory,
170 cananian 1.6.2.6 exceptionTypes, i);
171 cananian 1.6.2.6 parent.hasBeenModified = true;
172 cananian 1.6.2.6 return;
173 cananian 1.6.2.6 }
174 cananian 1.1 }
175 cananian 1.1
176 cananian 1.1 public void setSynthetic(boolean isSynthetic) {
177 cananian 1.6.2.6 if (this.isSynthetic != isSynthetic) parent.hasBeenModified = true;
178 cananian 1.1 this.isSynthetic = isSynthetic;
179 cananian 1.3 }
180 cananian 1.3
181 cananian 1.6 //----------------------------------------------------------
182 cananian 1.6
183 cananian 1.6.2.6 /** Make a method descriptor string given parameter and return value types.
184 cananian 1.6 * A helper function. */
185 cananian 1.6.2.4 static String makeDescriptor(HClass[] paramTypes, HClass returnType){
186 cananian 1.6 StringBuffer sb = new StringBuffer();
187 cananian 1.6 sb.append ('(');
188 cananian 1.6 for (int i = 0; i < paramTypes.length; i++){
189 cananian 1.6 sb.append (paramTypes[i].getDescriptor());
190 cananian 1.6 }
191 cananian 1.6 sb.append (')');
192 cananian 1.6 sb.append (returnType.getDescriptor());
193 cananian 1.6 return sb.toString();
194 cananian 1.1 }
195 cananian 1.6.2.3
196 cananian 1.6.2.9 //----------------------------------------------------------
197 cananian 1.6.2.9 // assertion helper.
198 cananian 1.6.2.9 private boolean checkLinker(HClass hc) {
199 cananian 1.6.2.9 return hc.isPrimitive() || hc.getLinker()==parent.getLinker();
200 cananian 1.6.2.9 }
201 cananian 1.6.2.3 //----------------------------------------------------------
202 cananian 1.1 }
203 cananian 1.1
204 cananian 1.1 // set emacs indentation style.
205 cananian 1.1 // Local Variables:
206 cananian 1.1 // c-basic-offset:2
207 cananian 1.1 // End: