/**
* Visits a method of the class. This method <i>must</i> return a new {@link MethodVisitor}
* instance (or <tt>null</tt>) each time it is called, i.e., it should not return a previously
* returned visitor.
*
* @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
* the method is synthetic and/or deprecated.
* @param name the method's name.
* @param desc the method's descriptor (see {@link Type Type}).
* @param signature the method's signature. May be <tt>null</tt> if the method parameters, return
* type and exceptions do not use generic types.
* @param exceptions the internal names of the method's exception classes (see {@link
* Type#getInternalName() getInternalName}). May be <tt>null</tt>.
* @return an object to visit the byte code of the method, or <tt>null</tt> if this class visitor
* is not interested in visiting the code of this method.
*/
public MethodVisitor visitMethod(
int access, String name, String desc, String signature, String[] exceptions) {
if (cv != null) {
return cv.visitMethod(access, name, desc, signature, exceptions);
}
return null;
}
public MethodVisitor visitMethod(
final int access,
final String name,
final String desc,
final String signature,
final String[] exceptions) {
return cv.visitMethod(access, name, desc, signature, exceptions);
}
/**
* Makes the given class visitor visit this method.
*
* @param cv a class visitor.
*/
public void accept(final ClassVisitor cv) {
String[] exceptions = new String[this.exceptions.size()];
this.exceptions.toArray(exceptions);
MethodVisitor mv = cv.visitMethod(access, name, desc, signature, exceptions);
if (mv != null) {
accept(mv);
}
}
private MethodVisitor declareMethod(
ClassVisitor visitor,
String methodName,
String methodDescriptor,
String methodSignature,
int access) {
MethodVisitor methodVisitor =
visitor.visitMethod(access, methodName, methodDescriptor, methodSignature, NO_EXCEPTIONS);
methodVisitor.visitCode();
return methodVisitor;
}
private void writeEqualsMethod(ClassVisitor cw, Type generatedType) {
MethodVisitor methodVisitor =
cw.visitMethod(Opcodes.ACC_PUBLIC, "equals", EQUALS_METHOD_DESCRIPTOR, null, null);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitVarInsn(ALOAD, 1);
Label notSameLabel = new Label();
methodVisitor.visitJumpInsn(IF_ACMPNE, notSameLabel);
methodVisitor.visitInsn(ICONST_1);
methodVisitor.visitInsn(IRETURN);
methodVisitor.visitLabel(notSameLabel);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitTypeInsn(INSTANCEOF, MANAGED_INSTANCE_TYPE);
Label notManagedInstanceLabel = new Label();
methodVisitor.visitJumpInsn(IFNE, notManagedInstanceLabel);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitInsn(IRETURN);
methodVisitor.visitLabel(notManagedInstanceLabel);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
generatedType.getInternalName(),
"getBackingNode",
GET_BACKING_NODE_METHOD_DESCRIPTOR,
false);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitTypeInsn(CHECKCAST, MANAGED_INSTANCE_TYPE);
methodVisitor.visitMethodInsn(
INVOKEINTERFACE,
MANAGED_INSTANCE_TYPE,
"getBackingNode",
GET_BACKING_NODE_METHOD_DESCRIPTOR,
true);
methodVisitor.visitMethodInsn(
INVOKEINTERFACE, MUTABLE_MODEL_NODE_TYPE, "equals", EQUALS_METHOD_DESCRIPTOR, true);
finishVisitingMethod(methodVisitor, Opcodes.IRETURN);
}
private static void generateFirstActivity(ApplicationWriter aw) {
ClassVisitor cv;
MethodVisitor mv;
cv = aw.visitClass(ACC_PUBLIC, "Lft/nevo/FirstActivity;", null, "Landroid/app/Activity;", null);
cv.visit(0, ACC_PUBLIC, "Lft/nevo/FirstActivity;", null, "Landroid/app/Activity;", null);
cv.visitSource("FirstActivity.java", null);
{
mv = cv.visitMethod(ACC_PUBLIC + ACC_CONSTRUCTOR, "<init>", "V", null, null);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLineNumber(6, l0);
mv.visitMethodInsn(
INSN_INVOKE_DIRECT, "Landroid/app/Activity;", "<init>", "V", new int[] {0});
mv.visitInsn(INSN_RETURN_VOID);
mv.visitMaxs(1, 0);
mv.visitEnd();
}
{
mv = cv.visitMethod(ACC_PUBLIC, "onCreate", "VLandroid/os/Bundle;", null, null);
mv.visitCode();
mv.visitParameters(new String[] {"savedInstanceState"});
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLineNumber(10, l0);
mv.visitMethodInsn(
INSN_INVOKE_SUPER,
"Landroid/app/Activity;",
"onCreate",
"VLandroid/os/Bundle;",
new int[] {1, 2});
Label l1 = new Label();
mv.visitLabel(l1);
mv.visitLineNumber(11, l1);
mv.visitVarInsn(INSN_CONST_HIGH16, 0, 2130903040);
mv.visitMethodInsn(
INSN_INVOKE_VIRTUAL, "Lft/nevo/FirstActivity;", "setContentView", "VI", new int[] {1, 0});
Label l2 = new Label();
mv.visitLabel(l2);
mv.visitLineNumber(14, l2);
mv.visitInsn(INSN_RETURN_VOID);
mv.visitMaxs(3, 0);
mv.visitEnd();
}
{
mv = cv.visitMethod(ACC_PUBLIC, "myMethod", "V", null, null);
mv.visitCode();
// Added code.
Label label1 = new Label();
Label label2 = new Label();
mv.visitLabel(label1);
mv.visitJumpInsn(INSN_GOTO_16, label2, 0, 0);
mv.visitJumpInsn(INSN_GOTO_16, label2, 0, 0);
// NOPs are inserted here.
for (int i = 0; i < MethodAdapterResizeGoto8BitsDoubleRefs.NB_NOPS; i++) {
mv.visitInsn(INSN_NOP);
}
mv.visitLabel(label2);
mv.visitJumpInsn(INSN_GOTO_16, label1, 0, 0);
mv.visitJumpInsn(INSN_GOTO_16, label1, 0, 0);
mv.visitInsn(INSN_RETURN_VOID);
mv.visitMaxs(1, 0);
mv.visitEnd();
}
cv.visitEnd();
}
