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30
31 package oracle.toplink.libraries.asm.util.attrs;
32
33 import java.util.List  ;
34 import java.util.Map ;
35
36 import oracle.toplink.libraries.asm.Attribute;
37 import oracle.toplink.libraries.asm.ClassReader;
38 import oracle.toplink.libraries.asm.Label;
39 import oracle.toplink.libraries.asm.attrs.StackMapAttribute;
40 import oracle.toplink.libraries.asm.attrs.StackMapFrame;
41 import oracle.toplink.libraries.asm.attrs.StackMapType;
42
43
48
49 public class ASMStackMapAttribute extends StackMapAttribute
50 implements ASMifiable
51 {
52
53 protected Attribute read (ClassReader cr, int off,
54 int len, char[] buf, int codeOff, Label[] labels)
55 {
56 StackMapAttribute attr =
57 (StackMapAttribute)super.read(cr, off, len, buf, codeOff, labels);
58
59 ASMStackMapAttribute result = new ASMStackMapAttribute();
60 result.frames = attr.frames;
61 return result;
62 }
63
64 public void asmify (StringBuffer buf, String varName, Map labelNames) {
65 buf.append("{\n");
66 buf.append("StackMapAttribute ").append(varName).append("Attr");
67 buf.append(" = new StackMapAttribute();\n");
68 if (frames.size() > 0) {
69 for (int i = 0; i < frames.size(); i++) {
70 asmify((StackMapFrame)frames.get(i), buf, varName + "frame" + i, labelNames);
71 }
72 }
73 buf.append(varName).append(".visitAttribute(").append(varName);
74 buf.append("Attr);\n}\n");
75 }
76
77 void asmify (StackMapFrame f, StringBuffer buf, String varName, Map labelNames) {
78 declareLabel(buf, labelNames, f.label);
79 buf.append("{\n");
80
81 buf.append("StackMapFrame ").append(varName).append( " = new StackMapFrame();\n");
82
83 buf.append(varName).append(".label = ")
84 .append(labelNames.get(f.label)).append(";\n");
85
86 asmifyTypeInfo(buf, varName, labelNames, f.locals, "locals");
87 asmifyTypeInfo(buf, varName, labelNames, f.stack, "stack");
88
89 buf.append( "cvAttr.frames.add(").append(varName).append(");\n");
90 buf.append("}\n");
91 }
92
93 void asmifyTypeInfo (StringBuffer buf, String varName,
94 Map labelNames, List infos, String field) {
95 if (infos.size() > 0) {
96 buf.append("{\n");
97 for (int i = 0; i < infos.size(); i++) {
98 StackMapType typeInfo = (StackMapType)infos.get(i);
99 String localName = varName + "Info" + i;
100 int type = typeInfo.getType();
101 buf.append("StackMapType ").append(localName)
102 .append(" = StackMapType.getTypeInfo( StackMapType.ITEM_")
103 .append(StackMapType.ITEM_NAMES[type]).append(");\n");
104
105 switch (type) {
106 case StackMapType.ITEM_Object: buf.append(localName).append(".setObject(\"")
108 .append(typeInfo.getObject()).append("\");\n");
109 break;
110
111 case StackMapType.ITEM_Uninitialized: declareLabel(buf, labelNames, typeInfo.getLabel());
113 buf.append(localName).append(".setLabel(")
114 .append(labelNames.get(typeInfo.getLabel())).append(");\n");
115 break;
116 }
117 buf.append(varName).append(".").append(field)
118 .append(".add(").append(localName).append(");\n");
119 }
120 buf.append("}\n");
121 }
122 }
123
124 static void declareLabel (StringBuffer buf, Map labelNames, Label l) {
125 String name = (String )labelNames.get(l);
126 if (name == null) {
127 name = "l" + labelNames.size();
128 labelNames.put(l, name);
129 buf.append("Label ").append(name).append(" = new Label();\n");
130 }
131 }
132 }
133 |
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