javax.lang
クラス Variant

java.lang.Object
  javax.lang.Variant

直系の既知のサブクラス:

Atom, BooleanExpression, Command, Event, Expression, LeftValue, MemoryData, Pattern, Term, Value

public class Variant

extends java.lang.Object

A base-class for variant-like data structure
Variant is also known as 'union'. A variant value can represent one value among multiple choices. From the functional viewpoint, variants are dual to records, or 'structs'.

作成者:

Toshihiro YOSHINO

入れ子クラスの概要

static class

Variant.InvalidTypeException An exception class thrown when the type (tag) of a variant is not the one which the program requires.

コンストラクタの概要

protected

Variant(int type) Constructs a Variant object.

メソッドの概要

protected void	assertType(int type) Assure the type of this object.
int	getType() Obtain the tag.
java.lang.String	toString() Pretty-print this object.
protected Variant.InvalidTypeException	unsupportedException(java.lang.String where) Helper method for generating InvalidTypeException
protected Variant.InvalidTypeException	unsupportedException(java.lang.String where, java.lang.String message) Helper method for generating InvalidTypeException

クラス java.lang.Object から継承したメソッド

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

コンストラクタの詳細

Variant

protected Variant(int type)

Constructs a Variant object.

パラメータ:

type - Tag

メソッドの詳細

getType

public final int getType()

Obtain the tag.

戻り値:

tag

assertType

protected final void assertType(int type)

Assure the type of this object. If the tag is not equal to type, InvalidTypeException is thrown.

パラメータ:

type - Tag

例外:

Variant.InvalidTypeException - when the assertion getType() == type failed.

unsupportedException

protected final Variant.InvalidTypeException unsupportedException(java.lang.String where)

Helper method for generating InvalidTypeException

パラメータ:

where - Place identifier.

戻り値:

InvalidTypeException object.

unsupportedException

protected final Variant.InvalidTypeException unsupportedException(java.lang.String where,
                                                                  java.lang.String message)

Helper method for generating InvalidTypeException

パラメータ:

where - Place identifier.

戻り値:

InvalidTypeException object.

toString

public java.lang.String toString()

Pretty-print this object.

戻り値:

string representation of this object.