org.basex.query.xquery.item
Class Seq

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

public class Seq
extends Item

Item sequence.

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 Seq	EMPTY Empty sequence.
int	size Number of entries.
Item[]	val Item array.

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

type

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	eq(Item it) Checks the items for equality.
static Item	get(Item[] v, int s) Constructor.
boolean	i() Checks if this is an item.
Iter	iter() Returns an item iterator.
void	plan(Serializer ser) Recursively sends the abstract syntax of this expression to the specified serializer.
int	size() Returns the sequence size or 1.
byte[]	str() Returns an atomized string.
java.lang.String	toString()

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

castErr, comp, d, dbl, dec, flt, hash, iter, itr, java, n, name, node, returned, s, score, score, serialize, 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

EMPTY

public static final Seq EMPTY

Empty sequence.

val

public Item[] val

Item array.

size

public int size

Number of entries.

Method Detail

get

public static Item get(Item[] v,
                       int s)

Constructor.

Parameters:

v - value

s - size

Returns:

resulting item or sequence

i

public final boolean i()

Description copied from class: Expr

Checks if this is an item.

Overrides:

i in class Item

Returns:

result of check

size

public int size()

Description copied from class: Item

Returns the sequence size or 1.

Overrides:

size in class Item

Returns:

result of check

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()
             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

iter

public Iter iter()

Description copied from class: Item

Returns an item iterator.

Overrides:

iter in class Item

Returns:

iterator

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)

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

toString

public java.lang.String toString()

Overrides:

toString in class Item

plan

public void plan(Serializer ser)
          throws java.io.IOException

Description copied from class: ExprInfo

Recursively sends the abstract syntax of this expression to the specified serializer.

Overrides:

plan in class Item

Parameters:

ser - serializer

Throws:

java.io.IOException - exception