com.asakusafw.operator.util

Class TypeHelper

java.lang.Object

com.asakusafw.operator.util.TypeHelper

public final class TypeHelper
extends Object

Common helper methods about types.

Method Summary

Modifier and Type	Method and Description
static TypeMirror	getInType(CompileEnvironment environment, TypeMirror type) Returns the type argument of In type.
static TypeMirror	getOutType(CompileEnvironment environment, TypeMirror type) Returns the type argument of Out type.
static boolean	isIn(CompileEnvironment environment, TypeMirror type) Returns whether the target type represents an input dataset.
static boolean	isOperatorHelper(CompileEnvironment environment, TypeMirror type) Returns whether the target type is an operator helper annotation.
static boolean	isOut(CompileEnvironment environment, TypeMirror type) Returns whether the target type represents an output dataset.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

isIn

public static boolean isIn(CompileEnvironment environment,
                           TypeMirror type)

Returns whether the target type represents an input dataset.

Parameters:

environment - current environment

type - target type

Returns:

true if represents an input, otherwise false

Throws:

IllegalArgumentException - if some parameters were null

See Also:

Constants.TYPE_IN

getInType

public static TypeMirror getInType(CompileEnvironment environment,
                                   TypeMirror type)

Returns the type argument of In type.

Parameters:

environment - current environment

type - target In type

Returns:

the type argument, or null if target type is not In type

Throws:

IllegalArgumentException - if some parameters were null

See Also:

isIn(CompileEnvironment, TypeMirror)

getOutType

public static TypeMirror getOutType(CompileEnvironment environment,
                                    TypeMirror type)

Returns the type argument of Out type.

Parameters:

environment - current environment

type - target Out type

Returns:

the type argument, or null if target type is not Out type

Throws:

IllegalArgumentException - if some parameters were null

See Also:

isIn(CompileEnvironment, TypeMirror)

isOut

public static boolean isOut(CompileEnvironment environment,
                            TypeMirror type)

Returns whether the target type represents an output dataset.

Parameters:

environment - current environment

type - target type

Returns:

true if represents an output, otherwise false

Throws:

IllegalArgumentException - if some parameters were null

See Also:

Constants.TYPE_IN

isOperatorHelper

public static boolean isOperatorHelper(CompileEnvironment environment,
                                       TypeMirror type)

Returns whether the target type is an operator helper annotation.

Parameters:

environment - current environment

type - target type

Returns:

true if is an operator helper annotation, otherwise false

Throws:

IllegalArgumentException - if some parameters were null

See Also:

Constants.TYPE_ANNOTATION_HELPER