org.basex.query.xquery.item
Class Dbl

java.lang.Object
  org.basex.query.xquery.expr.Expr
      org.basex.query.xquery.item.Item
          org.basex.query.xquery.item.Num
              org.basex.query.xquery.item.Dbl

public final class Dbl
extends Num

Double item.

Author:

Workgroup DBIS, University of Konstanz 2005-07, ISC License, Christian Gruen

Field Summary

static Dbl	NAN Invalid value.
static Dbl	ONE Zero value.
static Dbl	ZERO Zero value.

Fields inherited from class org.basex.query.xquery.expr.Expr

type

Method Summary

boolean	bool() Returns a boolean representation of the item.
double	dbl() Returns a double representation of the item.
int	diff(Item it) Returns the difference between the current and the specified item.
boolean	eq(Item it) Checks the items for equality.
float	flt() Returns a float representation of the item.
static Dbl	get(byte[] v) Returns an instance of this class.
static Dbl	get(double d) Returns an instance of this class.
long	itr() Returns a numeric (long) representation of the item.
static double	parse(byte[] val) Converts the given token into a double value.
byte[]	str() Returns an atomized string.

Methods inherited from class org.basex.query.xquery.item.Num

n

Methods inherited from class org.basex.query.xquery.item.Item

castErr, comp, eval, i, info, iter, serialize, serialize, size, toString

Methods inherited from class org.basex.query.xquery.expr.Expr

cls, d, e, node, s, u

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

NAN

public static final Dbl NAN

Invalid value.

ONE

public static final Dbl ONE

Zero value.

ZERO

public static final Dbl ZERO

Zero value.

Method Detail

bool

public boolean bool()

Description copied from class: Item

Returns a boolean representation of the item.

Overrides:

bool in class Item

Returns:

boolean value

dbl

public double dbl()

Description copied from class: Item

Returns a double representation of the item.

Overrides:

dbl in class Item

Returns:

double value

diff

public int diff(Item it)
         throws XQException

Description copied from class: Item

Returns the difference between the current and the specified item.

Overrides:

diff in class Item

Parameters:

it - item to be compared.

Returns:

difference

Throws:

XQException - evaluation exception

eq

public boolean eq(Item it)
           throws XQException

Description copied from class: Item

Checks the items for equality.

Specified by:

eq in class Item

Parameters:

it - item to be compared.

Returns:

result of check

Throws:

XQException - evaluation exception

flt

public float flt()

Description copied from class: Item

Returns a float representation of the item.

Overrides:

flt in class Item

Returns:

float value

get

public static Dbl get(byte[] v)
               throws XQException

Returns an instance of this class.

Parameters:

v - value

Returns:

instance

Throws:

XQException - evaluation exception

get

public static Dbl get(double d)

Returns an instance of this class.

Parameters:

d - value

Returns:

instance

itr

public long itr()

Description copied from class: Item

Returns a numeric (long) representation of the item.

Overrides:

itr in class Item

Returns:

long value

parse

public static double parse(byte[] val)
                    throws XQException

Converts the given token into a double value.

Parameters:

val - value to be converted

Returns:

double value

Throws:

XQException - possible converting exception

str

public byte[] str()

Description copied from class: Expr

Returns an atomized string.

Overrides:

str in class Expr

Returns:

string representation