/**
* mv.visitVarInsn(ILOAD, 2); Label l0 = new Label(); Label l1 = new Label(); Label l2 = new
* Label(); mv.visitTableSwitchInsn(0, 2, TheDefLabel, new Label[] { l0, l1, l2 });
* mv.visitLabel(l0); mv.visitVarInsn(ALOAD, 0); mv.visitVarInsn(ALOAD, 5);
* mv.visitTypeInsn(CHECKCAST, "java/lang/Integer"); mv.visitMethodInsn(INVOKEVIRTUAL,
* "java/lang/Integer", "intValue", "()I"); mv.visitFieldInsn(PUTFIELD, TheClassName, "f2", "I");
* mv.visitLabel(l1); mv.visitVarInsn(ALOAD, 0); mv.visitVarInsn(ALOAD, 5);
* mv.visitTypeInsn(CHECKCAST, "java/lang/String"); mv.visitFieldInsn(PUTFIELD, TheClassName,
* "f3", "Ljava/lang/String;"); mv.visitLabel(l2); mv.visitVarInsn(ALOAD, 0);
* mv.visitVarInsn(ALOAD, 5); mv.visitTypeInsn(CHECKCAST, "java/lang/String");
* mv.visitFieldInsn(PUTFIELD, TheClassName, "f4", "Ljava/lang/String;");
*/
private void genSetFieldSwitch(MethodVisitor mv, List<FieldInfo> fields, Label defaultLabel) {
int nFields = fields.size();
if (nFields == 0) {
mv.visitJumpInsn(GOTO, defaultLabel);
return;
}
Label[] labels = new Label[nFields];
for (int i = 0; i < nFields; i += 1) {
labels[i] = new Label();
}
mv.visitVarInsn(ILOAD, 2);
mv.visitTableSwitchInsn(0, nFields - 1, defaultLabel, labels);
for (int i = 0; i < nFields; i += 1) {
FieldInfo field = fields.get(i);
mv.visitLabel(labels[i]);
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 5);
if (isRefType(field.type)) {
mv.visitTypeInsn(CHECKCAST, getTypeInstName(field.type));
} else {
int sort = field.type.getSort();
mv.visitTypeInsn(CHECKCAST, getPrimitiveWrapperClass(sort).replace('.', '/'));
genUnwrapPrimitive(mv, sort);
}
mv.visitFieldInsn(PUTFIELD, className, field.name, field.type.getDescriptor());
mv.visitInsn(RETURN);
}
}
/**
* public boolean bdbIsPriKeyFieldNullOrZero() { return theField == null; // or zero or false, as
* appropriate // or if no primary key but has superclass: return
* super.bdbIsPriKeyFieldNullOrZero(); }
*/
private void genBdbIsPriKeyFieldNullOrZero() {
MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "bdbIsPriKeyFieldNullOrZero", "()Z", null, null);
mv.visitCode();
if (priKeyField != null) {
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, className, priKeyField.name, priKeyField.type.getDescriptor());
Label l0 = new Label();
if (isRefType(priKeyField.type)) {
mv.visitJumpInsn(IFNONNULL, l0);
} else {
genBeforeCompareToZero(mv, priKeyField.type);
mv.visitJumpInsn(IFNE, l0);
}
mv.visitInsn(ICONST_1);
Label l1 = new Label();
mv.visitJumpInsn(GOTO, l1);
mv.visitLabel(l0);
mv.visitInsn(ICONST_0);
mv.visitLabel(l1);
} else if (hasPersistentSuperclass) {
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, superclassName, "bdbIsPriKeyFieldNullOrZero", "()Z");
} else {
mv.visitInsn(ICONST_0);
}
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
private boolean genReadPrimitiveField(MethodVisitor mv, FieldInfo field) {
int sort = field.type.getSort();
if (sort == Type.OBJECT || sort == Type.ARRAY) {
return false;
}
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
genReadPrimitive(mv, sort);
mv.visitFieldInsn(PUTFIELD, className, field.name, field.type.getDescriptor());
return true;
}
/** output.registerPriKeyObject(priKeyField); // or input.registerPriKeyObject(priKeyField); */
private void genRegisterPrimaryKey(MethodVisitor mv, boolean input) {
String entityInputOrOutputClass =
input
? "com/sleepycat/persist/impl/EntityInput"
: "com/sleepycat/persist/impl/EntityOutput";
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, className, priKeyField.name, priKeyField.type.getDescriptor());
mv.visitMethodInsn(
INVOKEINTERFACE, entityInputOrOutputClass, "registerPriKeyObject", "(Ljava/lang/Object;)V");
}
/**
* field = input.readInt(); // and other primitives // or field = (FieldClass) input.readObject();
*/
private void genReadField(MethodVisitor mv, FieldInfo field) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
if (isRefType(field.type)) {
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityInput",
"readObject",
"()Ljava/lang/Object;");
mv.visitTypeInsn(CHECKCAST, getTypeInstName(field.type));
} else {
genReadPrimitive(mv, field.type.getSort());
}
mv.visitFieldInsn(PUTFIELD, className, field.name, field.type.getDescriptor());
}
/** output.writeInt(field); // and other primitives // or output.writeObject(field, null); */
private void genWriteField(MethodVisitor mv, FieldInfo field) {
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, className, field.name, field.type.getDescriptor());
int sort = field.type.getSort();
if (sort == Type.OBJECT || sort == Type.ARRAY) {
mv.visitInsn(ACONST_NULL);
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeObject",
"(Ljava/lang/Object;Lcom/sleepycat/persist/impl/Format;)V");
} else {
genWritePrimitive(mv, sort);
}
}
/**
* Generates reading of a simple type key field, or returns false if the key field is not a simple
* type (i.e., it is a composite key type).
*
* <p>field = input.readInt(); // and other primitives // or field =
* Integer.valueOf(input.readInt()); // and other simple types // or returns false
*/
private boolean genReadSimpleKeyField(MethodVisitor mv, FieldInfo field) {
if (genReadPrimitiveField(mv, field)) {
return true;
}
String fieldClassName = field.type.getClassName();
if (!isSimpleRefType(fieldClassName)) {
return false;
}
Integer sort = PRIMITIVE_WRAPPERS.get(fieldClassName);
if (sort != null) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
genReadPrimitive(mv, sort);
genWrapPrimitive(mv, sort);
} else if (fieldClassName.equals(Date.class.getName())) {
/* Date is a special case because we use NEW instead of valueOf. */
mv.visitVarInsn(ALOAD, 0);
mv.visitTypeInsn(NEW, "java/util/Date");
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 1);
genReadPrimitive(mv, Type.LONG);
mv.visitMethodInsn(INVOKESPECIAL, "java/util/Date", "<init>", "(J)V");
} else if (fieldClassName.equals(String.class.getName())) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityInput",
"readString",
"()Ljava/lang/String;");
} else if (fieldClassName.equals(BigInteger.class.getName())) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityInput",
"readBigInteger",
"()Ljava/math/BigInteger;");
} else {
throw new IllegalStateException(fieldClassName);
}
mv.visitFieldInsn(PUTFIELD, className, field.name, field.type.getDescriptor());
return true;
}
/**
* mv.visitVarInsn(ILOAD, 2); Label l0 = new Label(); Label l1 = new Label(); Label l2 = new
* Label(); mv.visitTableSwitchInsn(0, 2, TheDefLabel, new Label[] { l0, l1, l2 });
* mv.visitLabel(l0); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, TheClassName, "f2",
* "I"); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf",
* "(I)Ljava/lang/Integer;"); mv.visitInsn(ARETURN); mv.visitLabel(l1); mv.visitVarInsn(ALOAD, 0);
* mv.visitFieldInsn(GETFIELD, TheClassName, "f3", "Ljava/lang/String;"); mv.visitInsn(ARETURN);
* mv.visitLabel(l2); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, TheClassName, "f4",
* "Ljava/lang/String;"); mv.visitInsn(ARETURN);
*/
private void genGetFieldSwitch(MethodVisitor mv, List<FieldInfo> fields, Label defaultLabel) {
int nFields = fields.size();
if (nFields == 0) {
mv.visitJumpInsn(GOTO, defaultLabel);
return;
}
Label[] labels = new Label[nFields];
for (int i = 0; i < nFields; i += 1) {
labels[i] = new Label();
}
mv.visitVarInsn(ILOAD, 2);
mv.visitTableSwitchInsn(0, nFields - 1, defaultLabel, labels);
for (int i = 0; i < nFields; i += 1) {
FieldInfo field = fields.get(i);
mv.visitLabel(labels[i]);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, className, field.name, field.type.getDescriptor());
if (!isRefType(field.type)) {
genWrapPrimitive(mv, field.type.getSort());
}
mv.visitInsn(ARETURN);
}
}
/**
* Generates writing of a simple type key field, or returns false if the key field is not a simple
* type (i.e., it is a composite key type).
*
* <p>output.writeInt(theField); // and other primitives // or
* output.writeInt(theField.intValue()); // and other simple types // or returns false
*/
private boolean genWriteSimpleKeyField(MethodVisitor mv, FieldInfo field) {
if (genWritePrimitiveField(mv, field)) {
return true;
}
String fieldClassName = field.type.getClassName();
if (!isSimpleRefType(fieldClassName)) {
return false;
}
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, className, field.name, field.type.getDescriptor());
Integer sort = PRIMITIVE_WRAPPERS.get(fieldClassName);
if (sort != null) {
genUnwrapPrimitive(mv, sort);
genWritePrimitive(mv, sort);
} else if (fieldClassName.equals(Date.class.getName())) {
mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Date", "getTime", "()J");
genWritePrimitive(mv, Type.LONG);
} else if (fieldClassName.equals(String.class.getName())) {
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeString",
"(Ljava/lang/String;)Lcom/sleepycat/bind/tuple/TupleOutput;");
mv.visitInsn(POP);
} else if (fieldClassName.equals(BigInteger.class.getName())) {
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeBigInteger",
"(Ljava/math/BigInteger;)Lcom/sleepycat/bind/tuple/TupleOutput;");
mv.visitInsn(POP);
} else {
throw new IllegalStateException(fieldClassName);
}
return true;
}
/**
* public void bdbReadPriKeyField(EntityInput input, Format format) { theField = (TheFieldClass)
* input.readKeyObject(format); // or theField = input.readInt(); // and other simple types // or
* if no primary key but has superclass: super.bdbReadPriKeyField(input, format); }
*/
private void genBdbReadPriKeyField() {
MethodVisitor mv =
cv.visitMethod(
ACC_PUBLIC,
"bdbReadPriKeyField",
"(Lcom/sleepycat/persist/impl/EntityInput;" + "Lcom/sleepycat/persist/impl/Format;)V",
null,
null);
mv.visitCode();
if (priKeyField != null) {
if (!genReadSimpleKeyField(mv, priKeyField)) {
/* For a non-simple type, call EntityInput.readKeyObject. */
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityInput",
"readKeyObject",
"(Lcom/sleepycat/persist/impl/Format;)" + "Ljava/lang/Object;");
mv.visitTypeInsn(CHECKCAST, getTypeInstName(priKeyField.type));
mv.visitFieldInsn(PUTFIELD, className, priKeyField.name, priKeyField.type.getDescriptor());
}
} else if (hasPersistentSuperclass) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
mv.visitMethodInsn(
INVOKESPECIAL,
superclassName,
"bdbReadPriKeyField",
"(Lcom/sleepycat/persist/impl/EntityInput;" + "Lcom/sleepycat/persist/impl/Format;)V");
}
mv.visitInsn(RETURN);
mv.visitMaxs(3, 3);
mv.visitEnd();
}