Esempio n. 1
0
 /**
  * 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();
 }
Esempio n. 2
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 /**
  * 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();
 }
Esempio n. 3
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 /**
  * 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);
   }
 }
Esempio n. 4
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 /**
  * 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);
   }
 }
Esempio n. 5
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 /** // 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);
   }
 }
Esempio n. 6
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 /**
  * 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);
   }
 }