Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.ClassDefinition

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            List<Integer> sortChannels,
            List<SortOrder> sortOrders)
    {
        CallSiteBinder callSiteBinder = new CallSiteBinder();

        ClassDefinition classDefinition = new ClassDefinition(new CompilerContext(BOOTSTRAP_METHOD),
                a(PUBLIC, FINAL),
                makeClassName("PagesIndexComparator"),
                type(Object.class),
                type(PagesIndexComparator.class));

        classDefinition.declareDefaultConstructor(a(PUBLIC));
        generateCompareTo(classDefinition, callSiteBinder, sortTypes, sortChannels, sortOrders);

        return defineClass(classDefinition, PagesIndexComparator.class, callSiteBinder.getBindings(), getClass().getClassLoader());
    }
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            RowExpression filter,
            List<RowExpression> projections,
            BodyCompiler<T> bodyCompiler,
            Class<? extends T> superType)
    {
        ClassDefinition classDefinition = new ClassDefinition(new CompilerContext(BOOTSTRAP_METHOD),
                a(PUBLIC, FINAL),
                makeClassName(superType.getSimpleName()),
                type(Object.class),
                type(superType));

        classDefinition.declareDefaultConstructor(a(PUBLIC));

        CallSiteBinder callSiteBinder = new CallSiteBinder();
        bodyCompiler.generateMethods(classDefinition, callSiteBinder, filter, projections);

        //
        // toString method
        //
        generateToString(
                classDefinition,
                callSiteBinder,
                toStringHelper(classDefinition.getType().getJavaClassName())
                        .add("filter", filter)
                        .add("projections", projections)
                        .toString());

        return defineClass(classDefinition, superType, callSiteBinder.getBindings(), getClass().getClassLoader());
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            catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
                throw Throwables.propagate(e);
            }
        }

        ClassDefinition definition = new ClassDefinition(
                a(PUBLIC, FINAL),
                makeClassName(clazz.getSimpleName() + "Serializer"),
                type(Object.class),
                type(AccumulatorStateSerializer.class));

        CallSiteBinder callSiteBinder = new CallSiteBinder();

        // Generate constructor
        definition.declareDefaultConstructor(a(PUBLIC));

        List<StateField> fields = enumerateFields(clazz);
        generateGetSerializedType(definition, fields, callSiteBinder);
        generateSerialize(definition, clazz, fields);
        generateDeserialize(definition, clazz, fields);
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        }

        Class<? extends T> singleStateClass = generateSingleStateClass(clazz, classLoader);
        Class<? extends T> groupedStateClass = generateGroupedStateClass(clazz, classLoader);

        ClassDefinition definition = new ClassDefinition(
                a(PUBLIC, FINAL),
                makeClassName(clazz.getSimpleName() + "Factory"),
                type(Object.class),
                type(AccumulatorStateFactory.class));

        // Generate constructor
        definition.declareDefaultConstructor(a(PUBLIC));

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

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

        // Generate getters for state class
        definition.declareMethod(a(PUBLIC), "getSingleStateClass", type(Class.class, singleStateClass))
                .getBody()
                .push(singleStateClass)
                .retObject();

        definition.declareMethod(a(PUBLIC), "getGroupedStateClass", type(Class.class, groupedStateClass))
                .getBody()
                .push(groupedStateClass)
                .retObject();

        Class<? extends AccumulatorStateFactory> factoryClass = defineClass(definition, AccumulatorStateFactory.class, classLoader);
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        }
    }

    private static <T> Class<? extends T> generateSingleStateClass(Class<T> clazz, DynamicClassLoader classLoader)
    {
        ClassDefinition definition = new ClassDefinition(
                a(PUBLIC, FINAL),
                makeClassName("Single" + clazz.getSimpleName()),
                type(Object.class),
                type(clazz));

        // Store class size in static field
        FieldDefinition classSize = definition.declareField(a(PRIVATE, STATIC, FINAL), "CLASS_SIZE", long.class);
        definition.getClassInitializer()
                .getBody()
                .comment("CLASS_SIZE = ClassLayout.parseClass(%s.class).instanceSize()", definition.getName())
                .push(definition.getType())
                .invokeStatic(ClassLayout.class, "parseClass", ClassLayout.class, Class.class)
                .invokeVirtual(ClassLayout.class, "instanceSize", int.class)
                .intToLong()
                .putStaticField(classSize);

        // Add getter for class size
        definition.declareMethod(new CompilerContext(null), a(PUBLIC), "getEstimatedSize", type(long.class))
                .getBody()
                .getStaticField(classSize)
                .retLong();

        // Generate constructor
        Block constructor = definition.declareConstructor(a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(Object.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(
                a(PUBLIC, FINAL),
                makeClassName("Grouped" + clazz.getSimpleName()),
                type(AbstractGroupedAccumulatorState.class),
                type(clazz),
                type(GroupedAccumulator.class));

        List<StateField> fields = enumerateFields(clazz);

        // Create constructor
        Block constructor = definition.declareConstructor(
                a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(AbstractGroupedAccumulatorState.class);
        // Create ensureCapacity
        Block ensureCapacity = definition.declareMethod(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(a(PUBLIC), "getEstimatedSize", type(long.class))
                .getBody()
                .comment("long size = 0;")
                .push(0L);
        for (FieldDefinition field : fieldDefinitions) {
            getEstimatedSize
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            DynamicClassLoader classLoader)
    {
        boolean grouped = accumulatorInterface == GroupedAccumulator.class;
        boolean approximate = metadata.isApproximate();

        ClassDefinition definition = new ClassDefinition(
                a(PUBLIC, FINAL),
                makeClassName(metadata.getName() + accumulatorInterface.getSimpleName()),
                type(Object.class),
                type(accumulatorInterface));

        CallSiteBinder callSiteBinder = new CallSiteBinder();

        AccumulatorStateSerializer<?> stateSerializer = metadata.getStateSerializer();
        AccumulatorStateFactory<?> stateFactory = metadata.getStateFactory();

        FieldDefinition stateSerializerField = definition.declareField(a(PRIVATE, FINAL), "stateSerializer", AccumulatorStateSerializer.class);
        FieldDefinition stateFactoryField = definition.declareField(a(PRIVATE, FINAL), "stateFactory", AccumulatorStateFactory.class);
        FieldDefinition inputChannelsField = definition.declareField(a(PRIVATE, FINAL), "inputChannels", type(List.class, Integer.class));
        FieldDefinition maskChannelField = definition.declareField(a(PRIVATE, FINAL), "maskChannel", type(Optional.class, Integer.class));
        FieldDefinition sampleWeightChannelField = null;
        FieldDefinition confidenceField = null;
        if (approximate) {
            sampleWeightChannelField = definition.declareField(a(PRIVATE, FINAL), "sampleWeightChannel", type(Optional.class, Integer.class));
            confidenceField = definition.declareField(a(PRIVATE, FINAL), "confidence", double.class);
        }
        FieldDefinition stateField = definition.declareField(a(PRIVATE, FINAL), "state", grouped ? stateFactory.getGroupedStateClass() : stateFactory.getSingleStateClass());

        // Generate constructor
        generateConstructor(
                definition,
                stateSerializerField,
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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);
        checkInterface(clazz, fields);

        // 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), NamedParameterDefinition.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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