org.basex.query.xquery.item
Class Dbl

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

public final class Dbl
extends Num

Double item.

Author:
Workgroup DBIS, University of Konstanz 2005-08, ISC License, Christian Gruen

Nested Class Summary
 
Nested classes/interfaces inherited from class org.basex.query.xquery.expr.Expr
Expr.Return, Expr.Using
 
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.item.Item
type
 
Method Summary
 boolean bool()
          Returns a boolean representation of the item.
 double dbl()
          Returns a double representation of the item.
 java.math.BigDecimal dec()
          Returns a decimal 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.
 int hash()
          Returns a hash code.
static Iter iter(double v)
          Returns an iterator.
 long itr()
          Returns an integer (long) representation of the item.
 java.lang.Object java()
          Returns a Java object.
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.Item
castErr, comp, d, i, iter, iter, n, name, node, plan, returned, s, score, score, serialize, size, toString, u, uses
 
Methods inherited from class org.basex.query.xquery.expr.Expr
e
 
Methods inherited from class org.basex.query.ExprInfo
color, info
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

ZERO

public static final Dbl ZERO
Zero value.


ONE

public static final Dbl ONE
Zero value.


NAN

public static final Dbl NAN
Invalid value.

Method Detail

get

public static Dbl get(double d)
Returns an instance of this class.

Parameters:
d - value
Returns:
instance

iter

public static Iter iter(double v)
Returns an iterator.

Parameters:
v - double value
Returns:
item

get

public static Dbl get(byte[] v)
               throws XQException
Returns an instance of this class.

Parameters:
v - value
Returns:
instance
Throws:
XQException - evaluation exception

str

public byte[] str()
Description copied from class: Item
Returns an atomized string.

Overrides:
str in class Item
Returns:
string representation

bool

public boolean bool()
Description copied from class: Item
Returns a boolean representation of the item.

Overrides:
bool in class Item
Returns:
boolean value

itr

public long itr()
Description copied from class: Item
Returns an integer (long) representation of the item.

Overrides:
itr in class Item
Returns:
long value

flt

public float flt()
Description copied from class: Item
Returns a float representation of the item.

Overrides:
flt in class Item
Returns:
float 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

dec

public java.math.BigDecimal dec()
                         throws XQException
Description copied from class: Item
Returns a decimal representation of the item.

Overrides:
dec in class Item
Returns:
decimal value
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

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

hash

public int hash()
Description copied from class: Item
Returns a hash code.

Overrides:
hash in class Item
Returns:
hash code

java

public java.lang.Object java()
Description copied from class: Item
Returns a Java object.

Overrides:
java in class Item
Returns:
string representation

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