Examples of com.sleepycat.asm.MethodVisitor

com.sleepycat.asm.MethodVisitor
A visitor to visit a Java method. The methods of this interface must be called in the following order: [ visitAnnotationDefault ] ( visitAnnotation | visitParameterAnnotation | visitAttribute )* [ visitCode ( visitXInsn | visitLabel | visitTryCatchBlock | visitLocalVariable | visitLineNumber)* visitMaxs ] visitEnd. In addition, the visitXInsn and visitLabel methods must be called in the sequential order of the bytecode instructions of the visited code, and the visitLocalVariable and visitLineNumber methods must be called after the labels passed as arguments have been visited. @author Eric Bruneton

     *      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();
        
        /* 
         * In JE 5.0, String is treated as primitive type, so String does
         * not need to be registered. [#19247]
         */
        if (priKeyField != null && 
            isRefType(priKeyField.type) && 
            !priKeyField.isString) {
            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();
    }

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     *          }
     *      }
     *  }
     */
    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) &&
            !priKeyField.isString) {
            genRegisterPrimaryKey(mv, true);
        } else if (priKeyField != null && priKeyField.isString) {
            genRegisterPrimaryStringKey(mv);
        }
        genReadSuperKeyFields(mv, true);
        genReadFieldSwitch(mv, secKeyFields);
        mv.visitInsn(RETURN);
        mv.visitMaxs(5, 5);
        mv.visitEnd();
    }

View Full Code Here

     *  public void bdbWriteNonKeyFields(EntityOutput output) {
     *      // like bdbWriteSecKeyFields but does not call registerPriKeyObject
     *  }
     */
    private void genBdbWriteNonKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbWriteNonKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityOutput;)V", null, null);
        mv.visitCode();
        if (!isCompositeKey) {
            if (hasPersistentSuperclass) {
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitMethodInsn
                    (INVOKESPECIAL, superclassName, "bdbWriteNonKeyFields",
                     "(Lcom/sleepycat/persist/impl/EntityOutput;)V");
            }
            for (FieldInfo field : nonKeyFields) {
                genWriteField(mv, field);
            }
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
    }

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     *                                  int superLevel) {
     *      // like bdbReadSecKeyFields but does not call registerPriKeyObject
     *  }
     */
    private void genBdbReadNonKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbReadNonKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityInput;III)V", null, null);
        mv.visitCode();
        if (!isCompositeKey) {
            genReadSuperKeyFields(mv, false);
            genReadFieldSwitch(mv, nonKeyFields);
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(5, 5);
        mv.visitEnd();
    }

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     *      output.writeKeyObject(compositeKeyField2, formats[1]);
     *      // etc
     *  }
     */
    private void genBdbWriteCompositeKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbWriteCompositeKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityOutput;" +
             "[Lcom/sleepycat/persist/impl/Format;)V",
             null, null);
        mv.visitCode();
        if (isCompositeKey) {
            for (int i = 0; i < nonKeyFields.size(); i += 1) {
                FieldInfo field = nonKeyFields.get(i);
                if (!genWriteSimpleKeyField(mv, field)) {
                    /* For a non-simple type, call writeKeyObject. */
                    mv.visitVarInsn(ALOAD, 1);
                    mv.visitVarInsn(ALOAD, 0);
                    mv.visitFieldInsn
                        (GETFIELD, className, field.name,
                         field.type.getDescriptor());
                    mv.visitVarInsn(ALOAD, 2);
                    if (i <= Byte.MAX_VALUE) {
                        mv.visitIntInsn(BIPUSH, i);
                    } else {
                        mv.visitLdcInsn(new Integer(i));
                    }
                    mv.visitInsn(AALOAD);
                    mv.visitMethodInsn
                        (INVOKEINTERFACE,
                         "com/sleepycat/persist/impl/EntityOutput",
                         "writeKeyObject",
                         "(Ljava/lang/Object;" +
                          "Lcom/sleepycat/persist/impl/Format;)V");
                }
            }
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();
    }

View Full Code Here

     *      compositeKeyField1 = input.readInt();
     *      compositeKeyField2 = input.readKeyObject(formats[1]);
     *  }
     */
    private void genBdbReadCompositeKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbReadCompositeKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityInput;" +
             "[Lcom/sleepycat/persist/impl/Format;)V",
             null, null);
        mv.visitCode();
        if (isCompositeKey) {
            for (int i = 0; i < nonKeyFields.size(); i += 1) {
                FieldInfo field = nonKeyFields.get(i);
                /* Ignore non-simple (illegal) types for composite key. */
                if (!genReadSimpleKeyField(mv, field)) {
                    /* For a non-simple type, call readKeyObject. */
                    mv.visitVarInsn(ALOAD, 0);
                    mv.visitVarInsn(ALOAD, 1);
                    mv.visitVarInsn(ALOAD, 2);
                    if (i <= Byte.MAX_VALUE) {
                        mv.visitIntInsn(BIPUSH, i);
                    } else {
                        mv.visitLdcInsn(new Integer(i));
                    }
                    mv.visitInsn(AALOAD);
                    mv.visitMethodInsn
                        (INVOKEINTERFACE,
                         "com/sleepycat/persist/impl/EntityInput",
                         "readKeyObject",
                         "(Lcom/sleepycat/persist/impl/Format;)" +
                         "Ljava/lang/Object;");
                    mv.visitTypeInsn(CHECKCAST, getTypeInstName(field.type));
                    mv.visitFieldInsn
                        (PUTFIELD, className, field.name,
                         field.type.getDescriptor());
                }
            }
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(5, 5);
        mv.visitEnd();
    }

View Full Code Here

     *      }
     *      return null;
     *  }
     */
    private void genBdbGetField() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbGetField",
             "(Ljava/lang/Object;IIZ)Ljava/lang/Object;", null, null);
        mv.visitCode();
        mv.visitVarInsn(ILOAD, 3);
        Label l0 = new Label();
        mv.visitJumpInsn(IFLE, l0);
        Label l1 = new Label();
        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.visitMethodInsn
                (INVOKESPECIAL, className, "bdbGetField",
                 "(Ljava/lang/Object;IIZ)Ljava/lang/Object;");
            mv.visitInsn(ARETURN);
        } else {
            mv.visitJumpInsn(GOTO, l1);
        }
        mv.visitLabel(l0);
        mv.visitVarInsn(ILOAD, 4);
        Label l2 = new Label();
        mv.visitJumpInsn(IFEQ, l2);
        genGetFieldSwitch(mv, secKeyFields, l1);
        mv.visitLabel(l2);
        genGetFieldSwitch(mv, nonKeyFields, l1);
        mv.visitLabel(l1);
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 5);
        mv.visitEnd();
    }

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

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     *          super.bdbSetPriField(o, value)
     *      }
     *  }
     */
    private void genBdbSetPriField() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbSetPriField",
             "(Ljava/lang/Object;Ljava/lang/Object;)V", null, null);
        mv.visitCode();
        if (priKeyField != null) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 2);
            if (isRefType(priKeyField.type)) {
                mv.visitTypeInsn(CHECKCAST, getTypeInstName(priKeyField.type));
            } else {
                int sort = priKeyField.type.getSort();
                mv.visitTypeInsn
                    (CHECKCAST,
                     getPrimitiveWrapperClass(sort).replace('.', '/'));
                genUnwrapPrimitive(mv, sort);
            }
            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, "bdbSetPriField",
                 "(Ljava/lang/Object;Ljava/lang/Object;)V");
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();
    }

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     *      // 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();
    }

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