* @param paramAnnotations : the parameter annotations to move to this method.
*/
private void generateMethodWrapper(int access, String name, String desc, String signature, String[] exceptions,
List<LocalVariableNode> localVariables, List<ClassChecker.AnnotationDescriptor> annotations,
Map<Integer, List<ClassChecker.AnnotationDescriptor>> paramAnnotations) {
GeneratorAdapter mv = new GeneratorAdapter(cv.visitMethod(access, name, desc, signature, exceptions), access, name, desc);
// If we have variables, we wraps the code within labels. The `lifetime` of the variables are bound to those
// two variables.
boolean hasArgumentLabels = localVariables != null && !localVariables.isEmpty();
Label start = null;
if (hasArgumentLabels) {
start = new Label();
mv.visitLabel(start);
}
mv.visitCode();
Type returnType = Type.getReturnType(desc);
// Compute result and exception stack location
int result = -1;
int exception;
//int arguments = mv.newLocal(Type.getType((new Object[0]).getClass()));
if (returnType.getSort() != Type.VOID) {
// The method returns something
result = mv.newLocal(returnType);
exception = mv.newLocal(Type.getType(Throwable.class));
} else {
exception = mv.newLocal(Type.getType(Throwable.class));
}
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Throwable");
// Access the flag from the outer class
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, m_name, "this$0", "L" + m_outer + ";");
mv.visitFieldInsn(GETFIELD, m_outer, getMethodFlagName(name, desc), "Z");
mv.visitJumpInsn(IFNE, l0);
mv.visitVarInsn(ALOAD, 0);
mv.loadArgs();
mv.visitMethodInsn(INVOKESPECIAL, m_name, ClassManipulator.PREFIX + name, desc, false);
mv.visitInsn(returnType.getOpcode(IRETURN));
// end of the non intercepted method invocation.
mv.visitLabel(l0);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, m_name, "this$0", "L" + m_outer + ";");
mv.visitFieldInsn(GETFIELD, m_outer, ClassManipulator.IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");
mv.visitVarInsn(ALOAD, 0);
mv.visitLdcInsn(getMethodId(name, desc));
mv.loadArgArray();
mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", ClassManipulator.ENTRY,
"(Ljava/lang/Object;Ljava/lang/String;[Ljava/lang/Object;)V", false);
mv.visitVarInsn(ALOAD, 0);
// Do not allow argument modification : just reload arguments.
mv.loadArgs();
mv.visitMethodInsn(INVOKESPECIAL, m_name, ClassManipulator.PREFIX + name, desc, false);
if (returnType.getSort() != Type.VOID) {
mv.visitVarInsn(returnType.getOpcode(ISTORE), result);
}
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, m_name, "this$0", "L" + m_outer + ";");
mv.visitFieldInsn(GETFIELD, m_outer, ClassManipulator.IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");
mv.visitVarInsn(ALOAD, 0);
mv.visitLdcInsn(getMethodId(name, desc));
if (returnType.getSort() != Type.VOID) {
mv.visitVarInsn(returnType.getOpcode(ILOAD), result);
mv.box(returnType);
} else {
mv.visitInsn(ACONST_NULL);
}
mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager",
ClassManipulator.EXIT, "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V", false);
mv.visitLabel(l1);
Label l7 = new Label();
mv.visitJumpInsn(GOTO, l7);
mv.visitLabel(l2);
mv.visitVarInsn(ASTORE, exception);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, m_name, "this$0", "L" + m_outer + ";");
mv.visitFieldInsn(GETFIELD, m_outer, ClassManipulator.IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");
mv.visitVarInsn(ALOAD, 0);
mv.visitLdcInsn(getMethodId(name, desc));
mv.visitVarInsn(ALOAD, exception);
mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", ClassManipulator.ERROR,
"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Throwable;)V", false);
mv.visitVarInsn(ALOAD, exception);
mv.visitInsn(ATHROW);
mv.visitLabel(l7);
if (returnType.getSort() != Type.VOID) {
mv.visitVarInsn(returnType.getOpcode(ILOAD), result);
}
mv.visitInsn(returnType.getOpcode(IRETURN));
// If we had arguments, we mark the end of the lifetime.
Label end = null;
if (hasArgumentLabels) {
end = new Label();
mv.visitLabel(end);
}
// Move annotations
if (annotations != null) {
for (ClassChecker.AnnotationDescriptor ad : annotations) {
ad.visitAnnotation(mv);
}
}
// Move parameter annotations
if (paramAnnotations != null && ! paramAnnotations.isEmpty()) {
for (Integer id : paramAnnotations.keySet()) {
List<ClassChecker.AnnotationDescriptor> ads = paramAnnotations.get(id);
for (ClassChecker.AnnotationDescriptor ad : ads) {
ad.visitParameterAnnotation(id, mv);
}
}
}
// Write the arguments name.
if (hasArgumentLabels) {
for (LocalVariableNode var : localVariables) {
mv.visitLocalVariable(var.name, var.desc, var.signature, start, end, var.index);
}
}
mv.visitMaxs(0, 0);
mv.visitEnd();
}