/**
* public void bdbSetField(Object o, int field, int superLevel, boolean isSecField, Object value)
* { if (superLevel > 0) { // if has superclass: super.bdbSetField (o, field, superLevel - 1,
* isSecField, value); } else if (isSecField) { switch (field) { case 0: f2 = ((Integer)
* value).intValue(); case 1: f3 = (String) value; case 2: f4 = (String) value; } } else { switch
* (field) { case 0: f5 = ((Integer) value).intValue(); case 1: f6 = (String) value; case 2: f7 =
* (String) value; } } }
*/
private void genBdbSetField() {
MethodVisitor mv =
cv.visitMethod(
ACC_PUBLIC, "bdbSetField", "(Ljava/lang/Object;IIZLjava/lang/Object;)V", null, null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 3);
Label l0 = new Label();
mv.visitJumpInsn(IFLE, l0);
if (hasPersistentSuperclass) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ILOAD, 2);
mv.visitVarInsn(ILOAD, 3);
mv.visitInsn(ICONST_1);
mv.visitInsn(ISUB);
mv.visitVarInsn(ILOAD, 4);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(
INVOKESPECIAL, className, "bdbSetField", "(Ljava/lang/Object;IIZLjava/lang/Object;)V");
}
mv.visitInsn(RETURN);
mv.visitLabel(l0);
mv.visitVarInsn(ILOAD, 4);
Label l2 = new Label();
mv.visitJumpInsn(IFEQ, l2);
Label l1 = new Label();
genSetFieldSwitch(mv, secKeyFields, l1);
mv.visitLabel(l2);
genSetFieldSwitch(mv, nonKeyFields, l1);
mv.visitLabel(l1);
mv.visitInsn(RETURN);
mv.visitMaxs(2, 6);
mv.visitEnd();
}
/**
* public void bdbWriteNonKeyFields(EntityOutput output) { super.bdbWriteNonKeyFields(output); //
* if has super output.writeInt(nonKeyField1); output.writeObject(nonKeyField2, null); // etc }
*/
private void genBdbWriteNonKeyFields() {
MethodVisitor mv =
cv.visitMethod(
ACC_PUBLIC,
"bdbWriteNonKeyFields",
"(Lcom/sleepycat/persist/impl/EntityOutput;)V",
null,
null);
mv.visitCode();
if (hasPersistentSuperclass) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(
INVOKESPECIAL,
superclassName,
"bdbWriteNonKeyFields",
"(Lcom/sleepycat/persist/impl/EntityOutput;)V");
}
if (isCompositeKey) {
for (FieldInfo field : nonKeyFields) {
genWriteSimpleKeyField(mv, field);
/* Ignore non-simple (illegal) types for composite key. */
}
} else {
for (FieldInfo field : nonKeyFields) {
genWriteField(mv, field);
}
}
mv.visitInsn(RETURN);
mv.visitMaxs(2, 2);
mv.visitEnd();
}
/**
* public void bdbWriteSecKeyFields(EntityOutput output) {
* output.registerPriKeyObject(priKeyField); // if an object
* super.bdbWriteSecKeyFields(EntityOutput output); // if has super output.writeInt(secKeyField1);
* output.writeObject(secKeyField2, null); // etc }
*/
private void genBdbWriteSecKeyFields() {
MethodVisitor mv =
cv.visitMethod(
ACC_PUBLIC,
"bdbWriteSecKeyFields",
"(Lcom/sleepycat/persist/impl/EntityOutput;)V",
null,
null);
mv.visitCode();
if (priKeyField != null && isRefType(priKeyField.type)) {
genRegisterPrimaryKey(mv, false);
}
if (hasPersistentSuperclass) {
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(
INVOKESPECIAL,
superclassName,
"bdbWriteSecKeyFields",
"(Lcom/sleepycat/persist/impl/EntityOutput;)V");
}
for (FieldInfo field : secKeyFields) {
genWriteField(mv, field);
}
mv.visitInsn(RETURN);
mv.visitMaxs(2, 2);
mv.visitEnd();
}
/**
* 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();
}
/**
* public Object bdbNewArray(int len) { return new TheClass[len]; // or if abstract: return null;
* }
*/
private void genBdbNewArray() {
MethodVisitor mv =
cv.visitMethod(ACC_PUBLIC, "bdbNewArray", "(I)Ljava/lang/Object;", null, null);
mv.visitCode();
if (isAbstract) {
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 2);
} else {
mv.visitVarInsn(ILOAD, 1);
mv.visitTypeInsn(ANEWARRAY, className);
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 2);
mv.visitEnd();
}
}
/** public Object bdbNewInstance() { return new TheClass(); // or if abstract: return null; } */
private void genBdbNewInstance() {
MethodVisitor mv =
cv.visitMethod(ACC_PUBLIC, "bdbNewInstance", "()Ljava/lang/Object;", null, null);
mv.visitCode();
if (isAbstract) {
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 1);
} else {
mv.visitTypeInsn(NEW, className);
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, className, "<init>", "()V");
mv.visitInsn(ARETURN);
mv.visitMaxs(2, 1);
}
mv.visitEnd();
}
/**
* public void bdbReadSecKeyFields(EntityInput input, int startField, int endField, int
* superLevel) { input.registerPriKeyObject(priKeyField); // if an object // if has super: if
* (superLevel != 0) { super.bdbReadSecKeyFields(..., superLevel - 1); } if (superLevel <= 0) {
* switch (startField) { case 0: secKeyField1 = input.readInt(); if (endField == 0) break; case 1:
* secKeyField2 = (String) input.readObject(); if (endField == 1) break; case 2: secKeyField3 =
* input.readInt(); } } }
*/
private void genBdbReadSecKeyFields() {
MethodVisitor mv =
cv.visitMethod(
ACC_PUBLIC,
"bdbReadSecKeyFields",
"(Lcom/sleepycat/persist/impl/EntityInput;III)V",
null,
null);
mv.visitCode();
if (priKeyField != null && isRefType(priKeyField.type)) {
genRegisterPrimaryKey(mv, true);
}
genReadSuperKeyFields(mv, true);
genReadFieldSwitch(mv, secKeyFields);
mv.visitInsn(RETURN);
mv.visitMaxs(5, 5);
mv.visitEnd();
}
/**
* public void bdbReadNonKeyFields(EntityInput input, int startField, int endField, int
* superLevel) { // if has super: if (superLevel != 0) { super.bdbReadNonKeyFields(..., superLevel
* - 1); } nonKeyField1 = input.readInt(); nonKeyField2 = (String) input.readObject(); // etc //
* or like bdbReadSecKeyFields if not a composite key class }
*/
private void genBdbReadNonKeyFields() {
MethodVisitor mv =
cv.visitMethod(
ACC_PUBLIC,
"bdbReadNonKeyFields",
"(Lcom/sleepycat/persist/impl/EntityInput;III)V",
null,
null);
mv.visitCode();
if (isCompositeKey) {
for (FieldInfo field : nonKeyFields) {
genReadSimpleKeyField(mv, field);
/* Ignore non-simple (illegal) types for composite key. */
}
} else {
genReadSuperKeyFields(mv, false);
genReadFieldSwitch(mv, nonKeyFields);
}
mv.visitInsn(RETURN);
mv.visitMaxs(5, 5);
mv.visitEnd();
}
/**
* Outputs code in a static block to register the prototype instance:
*
* <p>static { EnhancedAccessor.registerClass(TheClassName, new TheClass()); // or for an abstract
* class: EnhancedAccessor.registerClass(TheClassName, null); }
*/
private void genStaticBlock() {
MethodVisitor mv = cv.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
mv.visitCode();
if (staticBlockMethod != null) {
mv.visitMethodInsn(INVOKESTATIC, className, staticBlockMethod, "()V");
}
mv.visitLdcInsn(className.replace('/', '.'));
if (isAbstract) {
mv.visitInsn(ACONST_NULL);
} else {
mv.visitTypeInsn(NEW, className);
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, className, "<init>", "()V");
}
mv.visitMethodInsn(
INVOKESTATIC,
"com/sleepycat/persist/impl/EnhancedAccessor",
"registerClass",
"(Ljava/lang/String;Lcom/sleepycat/persist/impl/Enhanced;)V");
mv.visitInsn(RETURN);
mv.visitMaxs(3, 0);
mv.visitEnd();
}
/**
* 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();
}
