Examples with MethodDefinition com.facebook.presto.bytecode.MethodDefinition used on opensource projects

Example 31 with MethodDefinition

use of com.facebook.presto.bytecode.MethodDefinition in project presto by prestodb.

the class AbstractGreatestLeast method generate.

private Class<?> generate(List<Class<?>> javaTypes, Type type, MethodHandle compareMethod) {
    String javaTypeName = javaTypes.stream().map(Class::getSimpleName).collect(joining());
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), CompilerUtils.makeClassName(javaTypeName + "$" + getSignature().getName()), type(Object.class));
    definition.declareDefaultConstructor(a(PRIVATE));
    List<Parameter> parameters = IntStream.range(0, javaTypes.size()).mapToObj(i -> arg("arg" + i, javaTypes.get(i))).collect(toImmutableList());
    MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), getSignature().getName(), type(javaTypes.get(0)), parameters);
    Scope scope = method.getScope();
    BytecodeBlock body = method.getBody();
    CallSiteBinder binder = new CallSiteBinder();
    if (type.getTypeSignature().getBase().equals(StandardTypes.DOUBLE)) {
        for (Parameter parameter : parameters) {
            body.append(parameter);
            body.append(invoke(binder.bind(CHECK_NOT_NAN.bindTo(getSignature().getName())), "checkNotNaN"));
        }
    }
    Variable value = scope.declareVariable(javaTypes.get(0), "value");
    body.append(value.set(parameters.get(0)));
    for (int i = 1; i < javaTypes.size(); i++) {
        body.append(new IfStatement().condition(new BytecodeBlock().append(parameters.get(i)).append(value).append(invoke(binder.bind(compareMethod), "compare"))).ifTrue(value.set(parameters.get(i))));
    }
    body.append(value.ret());
    return defineClass(definition, Object.class, binder.getBindings(), new DynamicClassLoader(getClass().getClassLoader()));
}

Example 32 with MethodDefinition

use of com.facebook.presto.bytecode.MethodDefinition in project presto by prestodb.

the class ArrayToArrayCast method generateArrayCast.

private static Class<?> generateArrayCast(TypeManager typeManager, Signature elementCastSignature, ScalarFunctionImplementation elementCast) {
    CallSiteBinder binder = new CallSiteBinder();
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), CompilerUtils.makeClassName(Joiner.on("$").join("ArrayCast", elementCastSignature.getArgumentTypes().get(0), elementCastSignature.getReturnType())), type(Object.class));
    Parameter session = arg("session", ConnectorSession.class);
    Parameter value = arg("value", Block.class);
    MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), "castArray", type(Block.class), session, value);
    Scope scope = method.getScope();
    BytecodeBlock body = method.getBody();
    Variable wasNull = scope.declareVariable(boolean.class, "wasNull");
    body.append(wasNull.set(constantBoolean(false)));
    // cast map elements
    Type fromElementType = typeManager.getType(elementCastSignature.getArgumentTypes().get(0));
    Type toElementType = typeManager.getType(elementCastSignature.getReturnType());
    CachedInstanceBinder cachedInstanceBinder = new CachedInstanceBinder(definition, binder);
    ArrayMapBytecodeExpression newArray = ArrayGeneratorUtils.map(scope, cachedInstanceBinder, fromElementType, toElementType, value, elementCastSignature.getName(), elementCast);
    // return the block
    body.append(newArray.ret());
    MethodDefinition constructorDefinition = definition.declareConstructor(a(PUBLIC));
    BytecodeBlock constructorBody = constructorDefinition.getBody();
    Variable thisVariable = constructorDefinition.getThis();
    constructorBody.comment("super();").append(thisVariable).invokeConstructor(Object.class);
    cachedInstanceBinder.generateInitializations(thisVariable, constructorBody);
    constructorBody.ret();
    return defineClass(definition, Object.class, binder.getBindings(), ArrayToArrayCast.class.getClassLoader());
}

Example 33 with MethodDefinition

use of com.facebook.presto.bytecode.MethodDefinition in project presto by prestodb.

the class ArrayConstructor method generateArrayConstructor.

private static Class<?> generateArrayConstructor(List<Class<?>> stackTypes, Type elementType) {
    List<String> stackTypeNames = stackTypes.stream().map(Class::getSimpleName).collect(toImmutableList());
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), CompilerUtils.makeClassName(Joiner.on("").join(stackTypeNames) + "ArrayConstructor"), type(Object.class));
    // Generate constructor
    definition.declareDefaultConstructor(a(PRIVATE));
    // Generate arrayConstructor()
    ImmutableList.Builder<Parameter> parameters = ImmutableList.builder();
    for (int i = 0; i < stackTypes.size(); i++) {
        Class<?> stackType = stackTypes.get(i);
        parameters.add(arg("arg" + i, stackType));
    }
    MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), "arrayConstructor", type(Block.class), parameters.build());
    Scope scope = method.getScope();
    BytecodeBlock body = method.getBody();
    Variable blockBuilderVariable = scope.declareVariable(BlockBuilder.class, "blockBuilder");
    CallSiteBinder binder = new CallSiteBinder();
    BytecodeExpression createBlockBuilder = blockBuilderVariable.set(constantType(binder, elementType).invoke("createBlockBuilder", BlockBuilder.class, newInstance(BlockBuilderStatus.class), constantInt(stackTypes.size())));
    body.append(createBlockBuilder);
    for (int i = 0; i < stackTypes.size(); i++) {
        if (elementType.getJavaType() == void.class) {
            body.append(blockBuilderVariable.invoke("appendNull", BlockBuilder.class));
        } else {
            Variable argument = scope.getVariable("arg" + i);
            IfStatement ifStatement = new IfStatement().condition(equal(argument, constantNull(stackTypes.get(i)))).ifTrue(blockBuilderVariable.invoke("appendNull", BlockBuilder.class).pop()).ifFalse(constantType(binder, elementType).writeValue(blockBuilderVariable, argument.cast(elementType.getJavaType())));
            body.append(ifStatement);
        }
    }
    body.append(blockBuilderVariable.invoke("build", Block.class).ret());
    return defineClass(definition, Object.class, binder.getBindings(), new DynamicClassLoader(ArrayConstructor.class.getClassLoader()));
}

Example 34 with MethodDefinition

use of com.facebook.presto.bytecode.MethodDefinition in project presto by prestodb.

the class StateCompiler method generateGroupedStateClass.

private static <T> Class<? extends T> generateGroupedStateClass(Class<T> clazz, Map<String, Type> fieldTypes, 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, fieldTypes);
    // Create constructor
    MethodDefinition constructor = definition.declareConstructor(a(PUBLIC));
    constructor.getBody().append(constructor.getThis()).invokeConstructor(AbstractGroupedAccumulatorState.class);
    // Create ensureCapacity
    MethodDefinition ensureCapacity = definition.declareMethod(a(PUBLIC), "ensureCapacity", type(void.class), arg("size", long.class));
    // Generate fields, constructor, and ensureCapacity
    List<FieldDefinition> fieldDefinitions = new ArrayList<>();
    for (StateField field : fields) {
        fieldDefinitions.add(generateGroupedField(definition, constructor, ensureCapacity, field));
    }
    constructor.getBody().ret();
    ensureCapacity.getBody().ret();
    // Generate getEstimatedSize
    MethodDefinition getEstimatedSize = definition.declareMethod(a(PUBLIC), "getEstimatedSize", type(long.class));
    BytecodeBlock body = getEstimatedSize.getBody();
    Variable size = getEstimatedSize.getScope().declareVariable(long.class, "size");
    // initialize size to 0L
    body.append(size.set(constantLong(0)));
    // add field to size
    for (FieldDefinition field : fieldDefinitions) {
        body.append(size.set(add(size, getEstimatedSize.getThis().getField(field).invoke("sizeOf", long.class))));
    }
    // return size
    body.append(size.ret());
    return defineClass(definition, clazz, classLoader);
}

Example 35 with MethodDefinition

use of com.facebook.presto.bytecode.MethodDefinition in project presto by prestodb.

the class StateCompiler method generateDeserialize.

private static <T> void generateDeserialize(ClassDefinition definition, CallSiteBinder binder, Class<T> clazz, List<StateField> fields) {
    Parameter block = arg("block", Block.class);
    Parameter index = arg("index", int.class);
    Parameter state = arg("state", Object.class);
    MethodDefinition method = definition.declareMethod(a(PUBLIC), "deserialize", type(void.class), block, index, state);
    BytecodeBlock deserializerBody = method.getBody();
    Scope scope = method.getScope();
    if (fields.size() == 1) {
        StateField field = fields.get(0);
        Method setter = getSetter(clazz, field);
        if (!field.isPrimitiveType()) {
            deserializerBody.append(new IfStatement().condition(block.invoke("isNull", boolean.class, index)).ifTrue(state.cast(setter.getDeclaringClass()).invoke(setter, constantNull(field.getType()))).ifFalse(state.cast(setter.getDeclaringClass()).invoke(setter, constantType(binder, field.getSqlType()).getValue(block, index))));
        } else {
            // For primitive type, we need to cast here because we serialize byte fields with TINYINT (whose java type is long).
            deserializerBody.append(state.cast(setter.getDeclaringClass()).invoke(setter, constantType(binder, field.getSqlType()).getValue(block, index).cast(field.getType())));
        }
    } else {
        Variable row = scope.declareVariable(Block.class, "row");
        deserializerBody.append(row.set(block.invoke("getObject", Object.class, index, constantClass(Block.class)).cast(Block.class)));
        int position = 0;
        for (StateField field : fields) {
            Method setter = getSetter(clazz, field);
            if (!field.isPrimitiveType()) {
                deserializerBody.append(new IfStatement().condition(row.invoke("isNull", boolean.class, constantInt(position))).ifTrue(state.cast(setter.getDeclaringClass()).invoke(setter, constantNull(field.getType()))).ifFalse(state.cast(setter.getDeclaringClass()).invoke(setter, constantType(binder, field.getSqlType()).getValue(row, constantInt(position)))));
            } else {
                // For primitive type, we need to cast here because we serialize byte fields with TINYINT (whose java type is long).
                deserializerBody.append(state.cast(setter.getDeclaringClass()).invoke(setter, constantType(binder, field.getSqlType()).getValue(row, constantInt(position)).cast(field.getType())));
            }
            position++;
        }
    }
    deserializerBody.ret();
}