/**
* 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);
}
}
/** 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");
}
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;
}
private void genWrapPrimitive(MethodVisitor mv, int sort) {
switch (sort) {
case Type.BOOLEAN:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;");
break;
case Type.CHAR:
mv.visitMethodInsn(
INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;");
break;
case Type.BYTE:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;");
break;
case Type.SHORT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;");
break;
case Type.INT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;");
break;
case Type.LONG:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;");
break;
case Type.FLOAT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;");
break;
case Type.DOUBLE:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;");
break;
default:
throw new IllegalStateException(String.valueOf(sort));
}
}
private void genUnwrapPrimitive(MethodVisitor mv, int sort) {
switch (sort) {
case Type.BOOLEAN:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z");
break;
case Type.CHAR:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Character", "charValue", "()C");
break;
case Type.BYTE:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Byte", "byteValue", "()B");
break;
case Type.SHORT:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Short", "shortValue", "()S");
break;
case Type.INT:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I");
break;
case Type.LONG:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J");
break;
case Type.FLOAT:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Float", "floatValue", "()F");
break;
case Type.DOUBLE:
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Double", "doubleValue", "()D");
break;
default:
throw new IllegalStateException(String.valueOf(sort));
}
}
/**
* 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);
}
}
/**
* 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 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 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 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();
}
/** // if has super: if (superLevel != 0) { super.bdbReadXxxKeyFields(..., superLevel - 1); } */
private void genReadSuperKeyFields(MethodVisitor mv, boolean areSecKeyFields) {
if (hasPersistentSuperclass) {
Label next = new Label();
mv.visitVarInsn(ILOAD, 4);
mv.visitJumpInsn(IFEQ, next);
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ILOAD, 2);
mv.visitVarInsn(ILOAD, 3);
mv.visitVarInsn(ILOAD, 4);
mv.visitInsn(ICONST_1);
mv.visitInsn(ISUB);
String name = areSecKeyFields ? "bdbReadSecKeyFields" : "bdbReadNonKeyFields";
mv.visitMethodInsn(
INVOKESPECIAL, superclassName, name, "(Lcom/sleepycat/persist/impl/EntityInput;III)V");
mv.visitLabel(next);
}
}
/**
* 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();
}
private void genReadPrimitive(MethodVisitor mv, int sort) {
switch (sort) {
case Type.BOOLEAN:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readBoolean", "()Z");
break;
case Type.CHAR:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readChar", "()C");
break;
case Type.BYTE:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readByte", "()B");
break;
case Type.SHORT:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readShort", "()S");
break;
case Type.INT:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readInt", "()I");
break;
case Type.LONG:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readLong", "()J");
break;
case Type.FLOAT:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readSortedFloat", "()F");
break;
case Type.DOUBLE:
mv.visitMethodInsn(
INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput", "readSortedDouble", "()D");
break;
default:
throw new IllegalStateException(String.valueOf(sort));
}
}
/**
* Call this method before comparing a non-reference operand to zero as an int, for example, with
* IFNE, IFEQ, IFLT, etc. If the operand is a long, float or double, this method will compare it
* to zero and leave the result as an int operand.
*/
private static void genBeforeCompareToZero(MethodVisitor mv, Type type) {
switch (type.getSort()) {
case Type.LONG:
mv.visitInsn(LCONST_0);
mv.visitInsn(LCMP);
break;
case Type.FLOAT:
mv.visitInsn(FCONST_0);
mv.visitInsn(FCMPL);
break;
case Type.DOUBLE:
mv.visitInsn(DCONST_0);
mv.visitInsn(DCMPL);
break;
}
}
/**
* 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;
}
private void genWritePrimitive(MethodVisitor mv, int sort) {
switch (sort) {
case Type.BOOLEAN:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeBoolean",
"(Z)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
case Type.CHAR:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeChar",
"(I)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
case Type.BYTE:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeByte",
"(I)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
case Type.SHORT:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeShort",
"(I)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
case Type.INT:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeInt",
"(I)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
case Type.LONG:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeLong",
"(J)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
case Type.FLOAT:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeSortedFloat",
"(F)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
case Type.DOUBLE:
mv.visitMethodInsn(
INVOKEINTERFACE,
"com/sleepycat/persist/impl/EntityOutput",
"writeSortedDouble",
"(D)Lcom/sleepycat/bind/tuple/TupleOutput;");
break;
default:
throw new IllegalStateException(String.valueOf(sort));
}
/* The write methods always return 'this' and we always discard it. */
mv.visitInsn(POP);
}
/**
* 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();
}
/**
* 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();
}
/**
* 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;
}
/** 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 bdbReadXxxKeyFields(EntityInput input, int startField, int endField, int
* superLevel) { // ... if (superLevel <= 0) { switch (startField) { case 0: keyField1 =
* input.readInt(); if (endField == 0) break; case 1: keyField2 = (String) input.readObject(); if
* (endField == 1) break; case 2: keyField3 = input.readInt(); } }
*/
private void genReadFieldSwitch(MethodVisitor mv, List<FieldInfo> fields) {
int nFields = fields.size();
if (nFields > 0) {
mv.visitVarInsn(ILOAD, 4);
Label pastSwitch = new Label();
mv.visitJumpInsn(IFGT, pastSwitch);
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, pastSwitch, labels);
for (int i = 0; i < nFields; i += 1) {
FieldInfo field = fields.get(i);
mv.visitLabel(labels[i]);
genReadField(mv, field);
if (i < nFields - 1) {
Label nextCase = labels[i + 1];
mv.visitVarInsn(ILOAD, 3);
if (i == 0) {
mv.visitJumpInsn(IFNE, nextCase);
} else {
switch (i) {
case 1:
mv.visitInsn(ICONST_1);
break;
case 2:
mv.visitInsn(ICONST_2);
break;
case 3:
mv.visitInsn(ICONST_3);
break;
case 4:
mv.visitInsn(ICONST_4);
break;
case 5:
mv.visitInsn(ICONST_5);
break;
default:
mv.visitIntInsn(BIPUSH, i);
}
mv.visitJumpInsn(IF_ICMPNE, nextCase);
}
mv.visitJumpInsn(GOTO, pastSwitch);
}
}
mv.visitLabel(pastSwitch);
}
}
/**
* 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 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();
}
