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19 package org.apache.cayenne.enhancer;
20
21 import org.apache.cayenne.ObjectContext;
22 import org.objectweb.asm.Label;
23 import org.objectweb.asm.MethodAdapter;
24 import org.objectweb.asm.MethodVisitor;
25 import org.objectweb.asm.Opcodes;
26 import org.objectweb.asm.Type;
27
28
32 public class SetterVisitor extends MethodAdapter {
33
34 private EnhancementHelper helper;
35 private String  propertyName;
36 private Type propertyType;
37
38 public SetterVisitor(MethodVisitor mv, EnhancementHelper helper, String propertyName,
39 Type propertyType) {
40 super(mv);
41 this.helper = helper;
42 this.propertyName = propertyName;
43 this.propertyType = propertyType;
44 }
45
46 @Override
47 public void visitCode() {
48 super.visitCode();
49
50 String field = helper.getPropertyField("objectContext");
51 Type objectContextType = Type.getType(ObjectContext.class);
52 String propertyDescriptor = propertyType.getDescriptor();
53
54 mv.visitVarInsn(Opcodes.ALOAD, 0);
55 mv.visitFieldInsn(
56 Opcodes.GETFIELD,
57 helper.getCurrentClass().getInternalName(),
58 field,
59 objectContextType.getDescriptor());
60 Label l1 = new Label();
61 mv.visitJumpInsn(Opcodes.IFNULL, l1);
62 mv.visitVarInsn(Opcodes.ALOAD, 0);
63 mv.visitFieldInsn(
64 Opcodes.GETFIELD,
65 helper.getCurrentClass().getInternalName(),
66 field,
67 objectContextType.getDescriptor());
68 mv.visitVarInsn(Opcodes.ALOAD, 0);
69 mv.visitLdcInsn(propertyName);
70 mv.visitVarInsn(Opcodes.ALOAD, 0);
71
72 mv.visitFieldInsn(
73 Opcodes.GETFIELD,
74 helper.getCurrentClass().getInternalName(),
75 propertyName,
76 propertyDescriptor);
77
78 if (!visitPrimitiveConversion(propertyDescriptor)) {
79 mv.visitVarInsn(Opcodes.ALOAD, 1);
80 }
81
82 mv
83 .visitMethodInsn(
84 Opcodes.INVOKEINTERFACE,
85 objectContextType.getInternalName(),
86 "propertyChanged",
87 "(Lorg/apache/cayenne/Persistent;Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V");
88 mv.visitLabel(l1);
89 }
90
91 protected boolean visitPrimitiveConversion(String propertyDescriptor) {
92 if (propertyDescriptor.length() != 1) {
93 return false;
94 }
95
96 switch (propertyDescriptor.charAt(0)) {
97 case 'I':
98 mv.visitMethodInsn(
99 Opcodes.INVOKESTATIC,
100 "java/lang/Integer",
101 "valueOf",
102 "(I)Ljava/lang/Integer;");
103 mv.visitVarInsn(Opcodes.ILOAD, 1);
104 mv.visitMethodInsn(
105 Opcodes.INVOKESTATIC,
106 "java/lang/Integer",
107 "valueOf",
108 "(I)Ljava/lang/Integer;");
109 return true;
110 case 'D':
111 mv.visitMethodInsn(
112 Opcodes.INVOKESTATIC,
113 "java/lang/Double",
114 "valueOf",
115 "(D)Ljava/lang/Double;");
116 mv.visitVarInsn(Opcodes.DLOAD, 1);
117 mv.visitMethodInsn(
118 Opcodes.INVOKESTATIC,
119 "java/lang/Double",
120 "valueOf",
121 "(D)Ljava/lang/Double;");
122 return true;
123 case 'F':
124 mv.visitMethodInsn(
125 Opcodes.INVOKESTATIC,
126 "java/lang/Float",
127 "valueOf",
128 "(F)Ljava/lang/Float;");
129 mv.visitVarInsn(Opcodes.FLOAD, 1);
130 mv.visitMethodInsn(
131 Opcodes.INVOKESTATIC,
132 "java/lang/Float",
133 "valueOf",
134 "(F)Ljava/lang/Float;");
135 return true;
136 case 'Z':
137 mv.visitMethodInsn(
138 Opcodes.INVOKESTATIC,
139 "java/lang/Boolean",
140 "valueOf",
141 "(Z)Ljava/lang/Boolean;");
142 mv.visitVarInsn(Opcodes.ILOAD, 1);
143 mv.visitMethodInsn(
144 Opcodes.INVOKESTATIC,
145 "java/lang/Boolean",
146 "valueOf",
147 "(Z)Ljava/lang/Boolean;");
148 return true;
149 case 'J':
150 mv.visitMethodInsn(
151 Opcodes.INVOKESTATIC,
152 "java/lang/Long",
153 "valueOf",
154 "(J)Ljava/lang/Long;");
155 mv.visitVarInsn(Opcodes.LLOAD, 1);
156 mv.visitMethodInsn(
157 Opcodes.INVOKESTATIC,
158 "java/lang/Long",
159 "valueOf",
160 "(J)Ljava/lang/Long;");
161 return true;
162 case 'B':
163 mv.visitMethodInsn(
164 Opcodes.INVOKESTATIC,
165 "java/lang/Byte",
166 "valueOf",
167 "(B)Ljava/lang/Byte;");
168 mv.visitVarInsn(Opcodes.ILOAD, 1);
169 mv.visitMethodInsn(
170 Opcodes.INVOKESTATIC,
171 "java/lang/Byte",
172 "valueOf",
173 "(B)Ljava/lang/Byte;");
174 return true;
175 case 'C':
176 mv.visitMethodInsn(
177 Opcodes.INVOKESTATIC,
178 "java/lang/Character",
179 "valueOf",
180 "(C)Ljava/lang/Character;");
181 mv.visitVarInsn(Opcodes.ILOAD, 1);
182 mv.visitMethodInsn(
183 Opcodes.INVOKESTATIC,
184 "java/lang/Character",
185 "valueOf",
186 "(C)Ljava/lang/Character;");
187 return true;
188 case 'S':
189 mv.visitMethodInsn(
190 Opcodes.INVOKESTATIC,
191 "java/lang/Short",
192 "valueOf",
193 "(S)Ljava/lang/Short;");
194 mv.visitVarInsn(Opcodes.ILOAD, 1);
195 mv.visitMethodInsn(
196 Opcodes.INVOKESTATIC,
197 "java/lang/Short",
198 "valueOf",
199 "(S)Ljava/lang/Short;");
200 return true;
201 default:
202 return false;
203 }
204 }
205 }
206 |
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