Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.ClassDefinition

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            public String apply(Class<?> input)
            {
                return input.getSimpleName();
            }
        }).toList();
        ClassDefinition definition = new ClassDefinition(
                new CompilerContext(null),
                a(PUBLIC, FINAL),
                CompilerUtils.makeClassName(Joiner.on("").join(stackTypeNames) + "ArrayConstructor"),
                type(Object.class));

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

        // Generate arrayConstructor()
        ImmutableList.Builder<NamedParameterDefinition> parameters = ImmutableList.builder();
        for (int i = 0; i < stackTypes.size(); i++) {
            Class<?> stackType = stackTypes.get(i);
            parameters.add(arg("arg" + i, stackType));
        }

        CompilerContext context = new CompilerContext(null);
        Block body = definition.declareMethod(context, a(PUBLIC, STATIC), "arrayConstructor", type(Slice.class), parameters.build())
                .getBody();

        Variable valuesVariable = context.declareVariable(List.class, "values");
        body.comment("List<Object> values = new ArrayList();")
                .newObject(ArrayList.class)
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    {
        this.bootstrapFunctionBinder = new BootstrapFunctionBinder(checkNotNull(metadata, "metadata is null"));

        // code gen a bootstrap class
        try {
            ClassDefinition classDefinition = new ClassDefinition(new CompilerContext(null),
                    a(PUBLIC, FINAL),
                    typeFromPathName("Bootstrap" + CLASS_ID.incrementAndGet()),
                    type(Object.class));

            FieldDefinition bootstrapField = classDefinition.declareField(a(PUBLIC, STATIC, FINAL), "BOOTSTRAP", type(AtomicReference.class, BootstrapFunctionBinder.class));

            classDefinition.getClassInitializer()
                    .getBody()
                    .newObject(AtomicReference.class)
                    .dup()
                    .invokeConstructor(AtomicReference.class)
                    .putStaticField(bootstrapField);

            classDefinition.declareMethod(new CompilerContext(null),
                    a(PUBLIC, STATIC),
                    "bootstrap",
                    type(CallSite.class),
                    arg("lookup", Lookup.class),
                    arg("name", String.class),
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            List<Expression> projections,
            Map<Input, Type> inputTypes,
            List<Type> outputTypes,
            DynamicClassLoader classLoader)
    {
        ClassDefinition classDefinition = new ClassDefinition(new CompilerContext(bootstrapMethod),
                a(PUBLIC, FINAL),
                typeFromPathName("FilterAndProjectOperator_" + CLASS_ID.incrementAndGet()),
                type(AbstractFilterAndProjectOperator.class));

        // declare fields
        FieldDefinition sessionField = classDefinition.declareField(a(PRIVATE, FINAL), "session", Session.class);

        // constructor
        classDefinition.declareConstructor(new CompilerContext(bootstrapMethod),
                a(PUBLIC),
                arg("operatorContext", OperatorContext.class),
                arg("tupleInfos", type(Iterable.class, TupleInfo.class)))
                .getBody()
                .comment("super(operatorContext, tupleInfos);")
                .pushThis()
                .getVariable("operatorContext")
                .getVariable("tupleInfos")
                .invokeConstructor(AbstractFilterAndProjectOperator.class, OperatorContext.class, Iterable.class)
                .comment("this.session = operatorContext.getSession();")
                .pushThis()
                .getVariable("operatorContext")
                .invokeVirtual(OperatorContext.class, "getSession", Session.class)
                .putField(sessionField)
                .ret();

        generateFilterAndProjectRowOriented(classDefinition, projections, inputTypes);

        //
        // filter method
        //
        generateFilterMethod(classDefinition, filter, inputTypes, true);
        generateFilterMethod(classDefinition, filter, inputTypes, false);

        //
        // project methods
        //
        List<TupleInfo> tupleInfos = new ArrayList<>();
        int projectionIndex = 0;
        for (int i = 0; i < projections.size(); i++) {
            Type outputType = outputTypes.get(i);
            checkArgument(outputType != Type.NULL, "NULL output type is not supported");
            tupleInfos.add(new TupleInfo(outputType.getRawType()));

            // verify the compiled projection has the correct type
            Expression projection = projections.get(i);

            Class<?> type = generateProjectMethod(classDefinition, "project_" + projectionIndex, projection, inputTypes, true);
            generateProjectMethod(classDefinition, "project_" + projectionIndex, projection, inputTypes, false);
            if (type == boolean.class) {
                checkState(outputType == Type.BOOLEAN);
            }
            else if (type == long.class) {
                checkState(outputType == Type.BIGINT);
            }
            else if (type == double.class) {
                checkState(outputType == Type.DOUBLE);
            }
            else if (type == Slice.class) {
                checkState(outputType == Type.VARCHAR);
            }
            else if (type == void.class) {
                // void type is a null literal so it can be any type
            }
            else {
                throw new IllegalStateException("Type " + type.getName() + "can be output");
            }
            projectionIndex++;
        }

        //
        // toString method
        //
        classDefinition.declareMethod(new CompilerContext(bootstrapMethod), a(PUBLIC), "toString", type(String.class))
                .getBody()
                .push(toStringHelper(classDefinition.getType().getJavaClassName())
                        .add("filter", filter)
                        .add("projections", projections)
                        .toString())
                .retObject();
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            List<Expression> projections,
            Map<Input, Type> inputTypes,
            List<Type> outputTypes,
            DynamicClassLoader classLoader)
    {
        ClassDefinition classDefinition = new ClassDefinition(new CompilerContext(bootstrapMethod),
                a(PUBLIC, FINAL),
                typeFromPathName("ScanFilterAndProjectOperator_" + CLASS_ID.incrementAndGet()),
                type(AbstractScanFilterAndProjectOperator.class));

        // declare fields
        FieldDefinition sessionField = classDefinition.declareField(a(PRIVATE, FINAL), "session", Session.class);

        // constructor
        classDefinition.declareConstructor(new CompilerContext(bootstrapMethod),
                a(PUBLIC),
                arg("operatorContext", OperatorContext.class),
                arg("sourceId", PlanNodeId.class),
                arg("dataStreamProvider", DataStreamProvider.class),
                arg("columns", type(Iterable.class, ColumnHandle.class)),
                arg("tupleInfos", type(Iterable.class, TupleInfo.class)))
                .getBody()
                .comment("super(operatorContext, sourceId, dataStreamProvider, columns, tupleInfos);")
                .pushThis()
                .getVariable("operatorContext")
                .getVariable("sourceId")
                .getVariable("dataStreamProvider")
                .getVariable("columns")
                .getVariable("tupleInfos")
                .invokeConstructor(AbstractScanFilterAndProjectOperator.class, OperatorContext.class, PlanNodeId.class, DataStreamProvider.class, Iterable.class, Iterable.class)
                .comment("this.session = operatorContext.getSession();")
                .pushThis()
                .getVariable("operatorContext")
                .invokeVirtual(OperatorContext.class, "getSession", Session.class)
                .putField(sessionField)
                .ret();

        generateFilterAndProjectRowOriented(classDefinition, projections, inputTypes);
        generateFilterAndProjectCursorMethod(classDefinition, projections);

        //
        // filter method
        //
        generateFilterMethod(classDefinition, filter, inputTypes, true);
        generateFilterMethod(classDefinition, filter, inputTypes, false);

        //
        // project methods
        //
        List<TupleInfo> tupleInfos = new ArrayList<>();
        int projectionIndex = 0;
        for (int i = 0; i < projections.size(); i++) {
            Type outputType = outputTypes.get(i);
            checkArgument(outputType != Type.NULL, "NULL output type is not supported");
            tupleInfos.add(new TupleInfo(outputType.getRawType()));

            // verify the compiled projection has the correct type
            Expression projection = projections.get(i);

            Class<?> type = generateProjectMethod(classDefinition, "project_" + projectionIndex, projection, inputTypes, true);
            generateProjectMethod(classDefinition, "project_" + projectionIndex, projection, inputTypes, false);
            if (type == boolean.class) {
                checkState(outputType == Type.BOOLEAN);
            }
            else if (type == long.class) {
                checkState(outputType == Type.BIGINT);
            }
            else if (type == double.class) {
                checkState(outputType == Type.DOUBLE);
            }
            else if (type == Slice.class) {
                checkState(outputType == Type.VARCHAR);
            }
            else if (type == void.class) {
                // void type is a null literal so it can be any type
            }
            else {
                throw new IllegalStateException("Type " + type.getName() + "can be output");
            }
            projectionIndex++;
        }

        //
        // toString method
        //
        classDefinition.declareMethod(new CompilerContext(bootstrapMethod), a(PUBLIC), "toString", type(String.class))
                .getBody()
                .push(toStringHelper(classDefinition.getType().getJavaClassName())
                        .add("filter", filter)
                        .add("projections", projections)
                        .toString())
                .retObject();
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            catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
                throw Throwables.propagate(e);
            }
        }

        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.declareDefaultConstructor(a(PUBLIC));

        List<StateField> fields = enumerateFields(clazz);
        generateGetSerializedType(definition, fields);
        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(new CompilerContext(null),
                a(PUBLIC, FINAL),
                typeFromPathName(clazz.getSimpleName() + "Factory_" + CLASS_ID.incrementAndGet()),
                type(Object.class),
                type(AccumulatorStateFactory.class));

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

        // 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();

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

        definition.declareMethod(new CompilerContext(null), 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(new CompilerContext(null),
                a(PUBLIC, FINAL),
                typeFromPathName("Single" + clazz.getSimpleName() + "_" + CLASS_ID.incrementAndGet()),
                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(new CompilerContext(null), 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(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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  • com.facebook.presto.operator.aggregation.AccumulatorCompiler
  • com.facebook.presto.operator.aggregation.state.StateCompiler
  • com.facebook.presto.operator.scalar.ArrayConstructor
  • com.facebook.presto.operator.scalar.MapConstructor
  • com.facebook.presto.sql.gen.ExpressionCompiler
  • com.facebook.presto.sql.gen.JoinCompiler
  • com.facebook.presto.sql.gen.JoinProbeCompiler
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