org.basex.query.xquery.item
Class Seq

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

Direct Known Subclasses:

SeqRange

public class Seq
extends Item

Item sequence.

Author:

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

Field Summary

static Seq

EMPTY Empty sequence.

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

type

Constructor Summary

Seq(Item[] v)
Constructor.

Seq(Item[] v, int s)
Constructor.

Seq(Type t)
Constructor.

Method Summary

boolean	bool() Returns a boolean representation of the item.
int	diff(Item it) Returns the difference between the current and the specified item.
boolean	e() Returns if this is an empty sequence.
boolean	eq(Item it) Checks the items for equality.
Iter	iter() Returns an iterator.
int	size() Returns the sequence size or 0.
byte[]	str() Returns an atomized string.
java.lang.String	toString()

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

castErr, comp, dbl, eval, flt, i, info, itr, serialize, serialize

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

cls, d, n, node, s, u

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final Seq EMPTY

Empty sequence.

Constructor Detail

Seq

public Seq(Item[] v)

Constructor.

Parameters:

v - value

Seq

public Seq(Item[] v,
           int s)

Constructor.

Parameters:

v - value

s - size

Seq

public Seq(Type t)

Constructor.

Parameters:

t - data type

Method Detail

bool

public boolean bool()
             throws XQException

Description copied from class: Item

Returns a boolean representation of the item.

Overrides:

bool in class Item

Returns:

boolean value

Throws:

XQException - evaluation exception

diff

public final int diff(Item it)

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

e

public boolean e()

Description copied from class: Expr

Returns if this is an empty sequence.

Overrides:

e in class Expr

Returns:

result of check

eq

public final 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

iter

public Iter iter()

Description copied from class: Item

Returns an iterator.

Overrides:

iter in class Item

Returns:

result of check

size

public int size()

Description copied from class: Expr

Returns the sequence size or 0.

Overrides:

size in class Item

Returns:

result of check

str

public final byte[] str()

Description copied from class: Expr

Returns an atomized string.

Overrides:

str in class Expr

Returns:

string representation

toString

public java.lang.String toString()

Overrides:

toString in class Item