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

Example 16 with ClassDefinition

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

the class ScalarMethodHandles method generateUnbound.

/**
 * Generates an unbound MethodHandle by {@code signature}.
 * <p>
 * For example, if {@code signature} describes a method like
 * <pre>
 * {@code
 * IntegerType func(
 *              IntegerType i,
 *              VarcharType j)
 * }
 * </pre>,
 * a method is generated as
 * <pre>
 * {@code
 * static Long callEvaluate(
 *              ScalarFunctionInvoker invoker,
 *              Long input_0,
 *              Slice input_1) {
 * return (Long) Invoker.evaluate(input_0, input_1);
 * }
 * }
 * </pre>,
 * and its MethodHandle returns.
 */
public static MethodHandle generateUnbound(Signature signature, TypeManager typeManager) {
    Class<?> returnType = Primitives.wrap(typeManager.getType(signature.getReturnType()).getJavaType());
    List<TypeSignature> argumentTypes = signature.getArgumentTypes();
    List<Class<?>> argumentJavaTypes = argumentTypes.stream().map(t -> typeManager.getType(t).getJavaType()).map(Primitives::wrap).collect(toImmutableList());
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), makeClassName(CLASS_NAME), ParameterizedType.type(Object.class));
    // Step 1: Declare default constructor
    definition.declareDefaultConstructor(a(PRIVATE));
    // Step 2: Declare method
    Parameter[] declareParameters = new Parameter[argumentTypes.size() + 1];
    declareParameters[0] = arg("invoker", ScalarFunctionInvoker.class);
    for (int i = 0; i < argumentTypes.size(); i++) {
        declareParameters[i + 1] = arg("input_" + i, argumentJavaTypes.get(i));
    }
    MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), METHOD_NAME, ParameterizedType.type(returnType), declareParameters);
    // Step 3: Implement method body
    BytecodeExpression[] evaluateInputs = new BytecodeExpression[argumentTypes.size()];
    for (int i = 0; i < argumentTypes.size(); i++) {
        evaluateInputs[i] = declareParameters[i + 1];
    }
    method.getBody().append(declareParameters[0].invoke("evaluate", Object.class, newArray(type(Object[].class), evaluateInputs)).cast(returnType).ret());
    // Step 4: Generate class
    Class<?> generatedClass = defineClass(definition, Object.class, Collections.emptyMap(), ScalarMethodHandles.class.getClassLoader());
    // Step 5: Lookup MethodHandle
    Class<?>[] lookupClasses = new Class[argumentTypes.size() + 1];
    lookupClasses[0] = ScalarFunctionInvoker.class;
    for (int i = 0; i < argumentTypes.size(); i++) {
        lookupClasses[i + 1] = Primitives.wrap(typeManager.getType(argumentTypes.get(i)).getJavaType());
    }
    return methodHandle(generatedClass, METHOD_NAME, lookupClasses);
}

Example 17 with ClassDefinition

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

the class AbstractGreatestLeast method generate.

private Class<?> generate(List<Class<?>> javaTypes, Type type, MethodHandle compareMethod) {
    checkCondition(javaTypes.size() <= 127, NOT_SUPPORTED, "Too many arguments for function call %s()", getSignature().getNameSuffix());
    String javaTypeName = javaTypes.stream().map(Class::getSimpleName).collect(joining());
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), makeClassName(javaTypeName + "$" + getSignature().getNameSuffix()), 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().getNameSuffix(), 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().getNameSuffix())), "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 18 with ClassDefinition

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

the class ArrayConstructor method generateArrayConstructor.

private static Class<?> generateArrayConstructor(List<Class<?>> stackTypes, Type elementType) {
    checkCondition(stackTypes.size() <= 254, NOT_SUPPORTED, "Too many arguments for array constructor");
    List<String> stackTypeNames = stackTypes.stream().map(Class::getSimpleName).collect(toImmutableList());
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), 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, constantNull(BlockBuilderStatus.class), constantInt(stackTypes.size())));
    body.append(createBlockBuilder);
    for (int i = 0; i < stackTypes.size(); i++) {
        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 19 with ClassDefinition

use of com.facebook.presto.bytecode.ClassDefinition 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));
    FieldDefinition instanceSize = generateInstanceSize(definition);
    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 the size of the instance
    body.append(size.set(getStatic(instanceSize)));
    // 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 20 with ClassDefinition

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

the class MapFilterFunction method generateFilter.

private static MethodHandle generateFilter(Type keyType, Type valueType) {
    CallSiteBinder binder = new CallSiteBinder();
    MapType mapType = new MapType(keyType, valueType);
    Class<?> keyJavaType = Primitives.wrap(keyType.getJavaType());
    Class<?> valueJavaType = Primitives.wrap(valueType.getJavaType());
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), makeClassName("MapFilter"), type(Object.class));
    definition.declareDefaultConstructor(a(PRIVATE));
    Parameter block = arg("block", Block.class);
    Parameter function = arg("function", MethodHandle.class);
    MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), "filter", type(Block.class), ImmutableList.of(block, function));
    BytecodeBlock body = method.getBody();
    Scope scope = method.getScope();
    Variable positionCount = scope.declareVariable(int.class, "positionCount");
    Variable position = scope.declareVariable(int.class, "position");
    Variable blockBuilder = scope.declareVariable(BlockBuilder.class, "blockBuilder");
    Variable keyElement = scope.declareVariable(keyJavaType, "keyElement");
    Variable valueElement = scope.declareVariable(valueJavaType, "valueElement");
    Variable keep = scope.declareVariable(Boolean.class, "keep");
    // invoke block.getPositionCount()
    body.append(positionCount.set(block.invoke("getPositionCount", int.class)));
    // create the interleaved block builder
    body.append(blockBuilder.set(newInstance(InterleavedBlockBuilder.class, constantType(binder, mapType).invoke("getTypeParameters", List.class), newInstance(BlockBuilderStatus.class), positionCount)));
    SqlTypeBytecodeExpression keySqlType = constantType(binder, keyType);
    BytecodeNode loadKeyElement;
    if (!keyType.equals(UNKNOWN)) {
        // key element must be non-null
        loadKeyElement = new BytecodeBlock().append(keyElement.set(keySqlType.getValue(block, position).cast(keyJavaType)));
    } else {
        loadKeyElement = new BytecodeBlock().append(keyElement.set(constantNull(keyJavaType)));
    }
    SqlTypeBytecodeExpression valueSqlType = constantType(binder, valueType);
    BytecodeNode loadValueElement;
    if (!valueType.equals(UNKNOWN)) {
        loadValueElement = new IfStatement().condition(block.invoke("isNull", boolean.class, add(position, constantInt(1)))).ifTrue(valueElement.set(constantNull(valueJavaType))).ifFalse(valueElement.set(valueSqlType.getValue(block, add(position, constantInt(1))).cast(valueJavaType)));
    } else {
        loadValueElement = new BytecodeBlock().append(valueElement.set(constantNull(valueJavaType)));
    }
    body.append(new ForLoop().initialize(position.set(constantInt(0))).condition(lessThan(position, positionCount)).update(incrementVariable(position, (byte) 2)).body(new BytecodeBlock().append(loadKeyElement).append(loadValueElement).append(keep.set(function.invoke("invokeExact", Boolean.class, keyElement, valueElement))).append(new IfStatement("if (keep != null && keep) ...").condition(and(notEqual(keep, constantNull(Boolean.class)), keep.cast(boolean.class))).ifTrue(new BytecodeBlock().append(keySqlType.invoke("appendTo", void.class, block, position, blockBuilder)).append(valueSqlType.invoke("appendTo", void.class, block, add(position, constantInt(1)), blockBuilder))))));
    body.append(blockBuilder.invoke("build", Block.class).ret());
    Class<?> generatedClass = defineClass(definition, Object.class, binder.getBindings(), MapFilterFunction.class.getClassLoader());
    return methodHandle(generatedClass, "filter", Block.class, MethodHandle.class);
}