/**
* 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 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 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);
}
}
/**
* 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);
}
}
/** // 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);
}
}
/**
* 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);
}
}