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1
54 package org.logicalcobwebs.cglib.proxy;
55
56 import java.lang.reflect.Method  ;
57 import java.lang.reflect.Modifier ;
58 import java.util.*;
59 import org.logicalcobwebs.cglib.core.*;
60 import org.logicalcobwebs.asm.Label;
61 import org.logicalcobwebs.asm.Type;
62
63 class LazyLoaderGenerator implements CallbackGenerator {
64 public static final LazyLoaderGenerator INSTANCE = new LazyLoaderGenerator();
65
66 private static final Signature LOAD_OBJECT =
67 TypeUtils.parseSignature("Object loadObject()");
68 private static final Type LAZY_LOADER =
69 TypeUtils.parseType("org.logicalcobwebs.cglib.proxy.LazyLoader");
70
71 public void generate(ClassEmitter ce, final Context context) {
72 Set indexes = new HashSet();
73 for (Iterator it = context.getMethods(); it.hasNext();) {
74 Method method = (Method )it.next();
75 if (Modifier.isProtected(method.getModifiers())) {
76 } else {
78 int index = context.getIndex(method);
79 indexes.add(new Integer (index));
80 CodeEmitter e = ce.begin_method(context.getModifiers(method),
81 ReflectUtils.getSignature(method),
82 ReflectUtils.getExceptionTypes(method),
83 null);
84 e.load_this();
85 e.dup();
86 e.invoke_virtual_this(loadMethod(index));
87 e.checkcast(Type.getType(method.getDeclaringClass()));
88 e.load_args();
89 e.invoke(method);
90 e.return_value();
91 e.end_method();
92 }
93 }
94
95 for (Iterator it = indexes.iterator(); it.hasNext();) {
96 int index = ((Integer )it.next()).intValue();
97
98 String delegate = "CGLIB$LAZY_LOADER_" + index;
99 ce.declare_field(Constants.ACC_PRIVATE, delegate, Constants.TYPE_OBJECT, null, null);
100
101 CodeEmitter e = ce.begin_method(Constants.ACC_PRIVATE |
102 Constants.ACC_SYNCHRONIZED |
103 Constants.ACC_FINAL,
104 loadMethod(index),
105 null,
106 null);
107 e.load_this();
108 e.getfield(delegate);
109 e.dup();
110 Label end = e.make_label();
111 e.ifnonnull(end);
112 e.pop();
113 e.load_this();
114 context.emitCallback(e, index);
115 e.invoke_interface(LAZY_LOADER, LOAD_OBJECT);
116 e.dup_x1();
117 e.putfield(delegate);
118 e.mark(end);
119 e.return_value();
120 e.end_method();
121
122 }
123 }
124
125 private Signature loadMethod(int index) {
126 return new Signature("CGLIB$LOAD_PRIVATE_" + index,
127 Constants.TYPE_OBJECT,
128 Constants.TYPES_EMPTY);
129 }
130
131 public void generateStatic(CodeEmitter e, Context context) { }
132 }
133 |
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