Examples with MethodDefinition io.airlift.bytecode.MethodDefinition used on opensource projects

Example 1 with MethodDefinition

use of io.airlift.bytecode.MethodDefinition in project hetu-core by openlookeng.

the class ConcatFunction method generateConcat.

private static Class<?> generateConcat(TypeSignature type, int arity) {
    checkCondition(arity <= 254, NOT_SUPPORTED, "Too many arguments for string concatenation");
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), makeClassName(type.getBase() + "_concat" + arity + "ScalarFunction"), type(Object.class));
    // Generate constructor
    definition.declareDefaultConstructor(a(PRIVATE));
    // Generate concat()
    List<Parameter> parameters = IntStream.range(0, arity).mapToObj(i -> arg("arg" + i, Slice.class)).collect(toImmutableList());
    MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), "concat", type(Slice.class), parameters);
    Scope scope = method.getScope();
    BytecodeBlock body = method.getBody();
    Variable length = scope.declareVariable(int.class, "length");
    body.append(length.set(constantInt(0)));
    for (int i = 0; i < arity; ++i) {
        body.append(length.set(generateCheckedAdd(length, parameters.get(i).invoke("length", int.class))));
    }
    Variable result = scope.declareVariable(Slice.class, "result");
    body.append(result.set(invokeStatic(Slices.class, "allocate", Slice.class, length)));
    Variable position = scope.declareVariable(int.class, "position");
    body.append(position.set(constantInt(0)));
    for (int i = 0; i < arity; ++i) {
        body.append(result.invoke("setBytes", void.class, position, parameters.get(i)));
        body.append(position.set(add(position, parameters.get(i).invoke("length", int.class))));
    }
    body.getVariable(result).retObject();
    return defineClass(definition, Object.class, ImmutableMap.of(), new DynamicClassLoader(ConcatFunction.class.getClassLoader()));
}

Example 2 with MethodDefinition

use of io.airlift.bytecode.MethodDefinition in project hetu-core by openlookeng.

the class ArrayToArrayCast method generateArrayCast.

private static Class<?> generateArrayCast(TypeManager typeManager, FunctionMetadata elementCastFunctionMetadata, BuiltInScalarFunctionImplementation elementCast) {
    CallSiteBinder binder = new CallSiteBinder();
    ClassDefinition definition = new ClassDefinition(a(PUBLIC, FINAL), makeClassName(Joiner.on("$").join("ArrayCast", elementCastFunctionMetadata.getArgumentTypes().get(0), elementCastFunctionMetadata.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(elementCastFunctionMetadata.getArgumentTypes().get(0));
    Type toElementType = typeManager.getType(elementCastFunctionMetadata.getReturnType());
    CachedInstanceBinder cachedInstanceBinder = new CachedInstanceBinder(definition, binder);
    ArrayMapBytecodeExpression newArray = ArrayGeneratorUtils.map(scope, cachedInstanceBinder, fromElementType, toElementType, value, elementCastFunctionMetadata.getName().getObjectName(), 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 3 with MethodDefinition

use of io.airlift.bytecode.MethodDefinition in project hetu-core by openlookeng.

the class AbstractMinMaxBy method generateCombineMethod.

private void generateCombineMethod(ClassDefinition definition, CallSiteBinder binder, MethodHandle compareMethod, Type keyType, Type valueType, Class<?> stateClass) {
    Parameter state = arg("state", stateClass);
    Parameter otherState = arg("otherState", stateClass);
    MethodDefinition method = definition.declareMethod(a(PUBLIC, STATIC), "combine", type(void.class), state, otherState);
    Class<?> keyJavaType = keyType.getJavaType();
    BytecodeBlock ifBlock = new BytecodeBlock().append(state.invoke("setFirst", void.class, otherState.invoke("getFirst", keyJavaType))).append(state.invoke("setFirstNull", void.class, otherState.invoke("isFirstNull", boolean.class))).append(state.invoke("setSecondNull", void.class, otherState.invoke("isSecondNull", boolean.class)));
    if (valueType.getJavaType().isPrimitive()) {
        ifBlock.append(state.invoke("setSecond", void.class, otherState.invoke("getSecond", valueType.getJavaType())));
    } else {
        ifBlock.append(new BytecodeBlock().append(state.invoke("setSecondBlock", void.class, otherState.invoke("getSecondBlock", Block.class))).append(state.invoke("setSecondPosition", void.class, otherState.invoke("getSecondPosition", int.class))));
    }
    method.getBody().append(new IfStatement().condition(or(state.invoke("isFirstNull", boolean.class), and(not(otherState.invoke("isFirstNull", boolean.class)), loadConstant(binder, compareMethod, MethodHandle.class).invoke("invokeExact", boolean.class, otherState.invoke("getFirst", keyJavaType), state.invoke("getFirst", keyJavaType))))).ifTrue(ifBlock)).ret();
}

Example 4 with MethodDefinition

use of io.airlift.bytecode.MethodDefinition in project hetu-core by openlookeng.

the class AccumulatorCompiler method generatePrepareFinal.

private static void generatePrepareFinal(ClassDefinition definition) {
    MethodDefinition method = definition.declareMethod(a(PUBLIC), "prepareFinal", type(void.class));
    method.getBody().ret();
}

Example 5 with MethodDefinition

use of io.airlift.bytecode.MethodDefinition in project hetu-core by openlookeng.

the class AccumulatorCompiler method generateGetEstimatedSize.

private static void generateGetEstimatedSize(ClassDefinition definition, List<FieldDefinition> stateFields) {
    MethodDefinition method = definition.declareMethod(a(PUBLIC), "getEstimatedSize", type(long.class));
    Variable estimatedSize = method.getScope().declareVariable(long.class, "estimatedSize");
    method.getBody().append(estimatedSize.set(constantLong(0L)));
    for (FieldDefinition stateField : stateFields) {
        method.getBody().append(estimatedSize.set(BytecodeExpressions.add(estimatedSize, method.getThis().getField(stateField).invoke("getEstimatedSize", long.class))));
    }
    method.getBody().append(estimatedSize.ret());
}