Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.CompilerContext

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                .retInt();
    }

    private void generatePositionEqualsCursorsMethod(ClassDefinition classDefinition, List<FieldDefinition> joinChannelFields)
    {
        MethodDefinition hashPositionMethod = classDefinition.declareMethod(new CompilerContext(bootstrapMethod),
                a(PUBLIC),
                "positionEqualsCursors",
                type(boolean.class),
                arg("blockIndex", int.class),
                arg("blockPosition", int.class),
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                .retInt();
    }

    private void generatePositionEqualsPositionMethod(ClassDefinition classDefinition, List<FieldDefinition> joinChannelFields)
    {
        MethodDefinition hashPositionMethod = classDefinition.declareMethod(new CompilerContext(bootstrapMethod),
                a(PUBLIC),
                "positionEqualsPosition",
                type(boolean.class),
                arg("leftBlockIndex", int.class),
                arg("leftBlockPosition", int.class),
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            }
        }

        DynamicClassLoader classLoader = createClassLoader();

        ClassDefinition definition = new ClassDefinition(new CompilerContext(null),
                a(PUBLIC, FINAL),
                typeFromPathName(clazz.getSimpleName() + "Serializer_" + CLASS_ID.incrementAndGet()),
                type(Object.class),
                type(AccumulatorStateSerializer.class));

        // Generate constructor
        definition.declareConstructor(new CompilerContext(null), a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(Object.class)
                .ret();
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        return null;
    }

    private static <T> void generateDeserialize(ClassDefinition definition, Class<T> clazz, List<StateField> fields)
    {
        CompilerContext compilerContext = new CompilerContext(null);
        Block deserializerBody = definition.declareMethod(compilerContext, a(PUBLIC), "deserialize", type(void.class), arg("block", com.facebook.presto.spi.block.Block.class), arg("index", int.class), arg("state", Object.class)).getBody();

        if (fields.size() == 1) {
            generatePrimitiveDeserializer(deserializerBody, getSetter(clazz, fields.get(0)));
        }
        else {
            LocalVariableDefinition slice = compilerContext.declareVariable(Slice.class, "slice");
            deserializerBody.comment("Slice slice = block.getSlice(index);")
                    .getVariable("block")
                    .getVariable("index")
                    .invokeInterface(com.facebook.presto.spi.block.Block.class, "getSlice", Slice.class, int.class)
                    .putVariable(slice);
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        deserializerBody.ret();
    }

    private static <T> void generateSerialize(ClassDefinition definition, Class<T> clazz, List<StateField> fields)
    {
        CompilerContext compilerContext = new CompilerContext(null);
        Block serializerBody = definition.declareMethod(compilerContext, a(PUBLIC), "serialize", type(void.class), arg("state", Object.class), arg("out", BlockBuilder.class)).getBody();

        if (fields.size() == 1) {
            generatePrimitiveSerializer(serializerBody, getGetter(clazz, fields.get(0)));
        }
        else {
            LocalVariableDefinition slice = compilerContext.declareVariable(Slice.class, "slice");
            int size = serializedSizeOf(clazz);
            serializerBody.comment("Slice slice = Slices.allocate(%d);", size)
                    .push(size)
                    .invokeStatic(Slices.class, "allocate", Slice.class, int.class)
                    .putVariable(slice);
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        DynamicClassLoader classLoader = createClassLoader();
        Class<? extends T> singleStateClass = generateSingleStateClass(clazz, classLoader);
        Class<? extends T> groupedStateClass = generateGroupedStateClass(clazz, classLoader);

        ClassDefinition definition = new ClassDefinition(new CompilerContext(null),
                a(PUBLIC, FINAL),
                typeFromPathName(clazz.getSimpleName() + "Factory_" + CLASS_ID.incrementAndGet()),
                type(Object.class),
                type(AccumulatorStateFactory.class));

        // Generate constructor
        definition.declareConstructor(new CompilerContext(null), a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(Object.class)
                .ret();

        // Generate single state creation method
        definition.declareMethod(new CompilerContext(null), a(PUBLIC), "createSingleState", type(Object.class))
                .getBody()
                .newObject(singleStateClass)
                .dup()
                .invokeConstructor(singleStateClass)
                .retObject();

        // Generate grouped state creation method
        definition.declareMethod(new CompilerContext(null), a(PUBLIC), "createGroupedState", type(Object.class))
                .getBody()
                .newObject(groupedStateClass)
                .dup()
                .invokeConstructor(groupedStateClass)
                .retObject();
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        }
    }

    private static <T> Class<? extends T> generateSingleStateClass(Class<T> clazz, DynamicClassLoader classLoader)
    {
        ClassDefinition definition = new ClassDefinition(new CompilerContext(null),
                a(PUBLIC, FINAL),
                typeFromPathName("Single" + clazz.getSimpleName() + "_" + CLASS_ID.incrementAndGet()),
                type(AbstractAccumulatorState.class),
                type(clazz));

        // Generate constructor
        Block constructor = definition.declareConstructor(new CompilerContext(null), a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(AbstractAccumulatorState.class);

        // Generate fields
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        return defineClass(definition, clazz, classLoader);
    }

    private static <T> Class<? extends T> generateGroupedStateClass(Class<T> clazz, DynamicClassLoader classLoader)
    {
        ClassDefinition definition = new ClassDefinition(new CompilerContext(null),
                a(PUBLIC, FINAL),
                typeFromPathName("Grouped" + clazz.getSimpleName() + "_" + CLASS_ID.incrementAndGet()),
                type(AbstractGroupedAccumulatorState.class),
                type(clazz),
                type(GroupedAccumulator.class));

        List<StateField> fields = enumerateFields(clazz);

        // Create constructor
        Block constructor = definition.declareConstructor(new CompilerContext(null), a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(AbstractGroupedAccumulatorState.class);
        // Create ensureCapacity
        Block ensureCapacity = definition.declareMethod(new CompilerContext(null), a(PUBLIC), "ensureCapacity", type(void.class), arg("size", long.class)).getBody();

        // Generate fields, constructor, and ensureCapacity
        List<FieldDefinition> fieldDefinitions = new ArrayList<>();
        for (StateField field : fields) {
            fieldDefinitions.add(generateGroupedField(definition, constructor, ensureCapacity, field));
        }

        constructor.ret();
        ensureCapacity.ret();

        // Generate getEstimatedSize
        Block getEstimatedSize = definition.declareMethod(new CompilerContext(null), a(PUBLIC), "getEstimatedSize", type(long.class))
                .getBody()
                .comment("long size = 0;")
                .push(0L);
        for (FieldDefinition field : fieldDefinitions) {
            getEstimatedSize
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    private static void generateField(ClassDefinition definition, Block constructor, StateField stateField)
    {
        FieldDefinition field = definition.declareField(a(PRIVATE), UPPER_CAMEL.to(LOWER_CAMEL, stateField.getName()) + "Value", stateField.getType());

        // Generate getter
        definition.declareMethod(new CompilerContext(null), a(PUBLIC), stateField.getGetterName(), type(stateField.getType()))
                .getBody()
                .pushThis()
                .getField(field)
                .ret(stateField.getType());

        // Generate setter
        definition.declareMethod(new CompilerContext(null), a(PUBLIC), stateField.getSetterName(), type(void.class), arg("value", stateField.getType()))
                .getBody()
                .pushThis()
                .getVariable("value")
                .putField(field)
                .ret();
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    {
        Class<?> bigArrayType = getBigArrayType(stateField.getType());
        FieldDefinition field = definition.declareField(a(PRIVATE), UPPER_CAMEL.to(LOWER_CAMEL, stateField.getName()) + "Values", bigArrayType);

        // Generate getter
        definition.declareMethod(new CompilerContext(null), a(PUBLIC), stateField.getGetterName(), type(stateField.getType()))
                .getBody()
                .comment("return field.get(getGroupId());")
                .pushThis()
                .getField(field)
                .pushThis()
                .invokeVirtual(AbstractGroupedAccumulatorState.class, "getGroupId", long.class)
                .invokeVirtual(bigArrayType, "get", stateField.getType(), long.class)
                .ret(stateField.getType());

        // Generate setter
        definition.declareMethod(new CompilerContext(null), a(PUBLIC), stateField.getSetterName(), type(void.class), arg("value", stateField.getType()))
                .getBody()
                .comment("return field.set(getGroupId(), value);")
                .pushThis()
                .getField(field)
                .pushThis()
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