Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.FieldDefinition

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        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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            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()
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                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),
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                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),
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                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)
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        return defineClass(definition, clazz, classLoader);
    }

    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()
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    }

    private static FieldDefinition generateGroupedField(ClassDefinition definition, Block constructor, Block ensureCapacity, StateField stateField)
    {
        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()
                .invokeVirtual(AbstractGroupedAccumulatorState.class, "getGroupId", long.class)
                .getVariable("value")
                .invokeVirtual(bigArrayType, "set", void.class, long.class, stateField.getType())
                .ret();

        ensureCapacity.pushThis()
                .getField(field)
                .getVariable("size")
                .invokeVirtual(field.getType(), "ensureCapacity", type(void.class), type(long.class));

        // Initialize field in constructor
        constructor.pushThis()
                .newObject(field.getType())
                .dup();
        pushInitialValue(constructor, stateField);
        constructor.invokeConstructor(field.getType(), type(stateField.getType()));
        constructor.putField(field);

        return field;
    }
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Related Classes of com.facebook.presto.byteCode.FieldDefinition

  • com.facebook.presto.operator.aggregation.AccumulatorCompiler
  • com.facebook.presto.operator.aggregation.state.StateCompiler
  • com.facebook.presto.sql.gen.ExpressionCompiler
  • com.facebook.presto.sql.gen.JoinCompiler
  • com.facebook.presto.sql.gen.JoinProbeCompiler
  • org.objectweb.asm.FieldVisitor
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