org.basex.query.xpath.item
Class Nod

java.lang.Object
  org.basex.query.ExprInfo
      org.basex.query.xpath.expr.Expr
          org.basex.query.xpath.item.Item
              org.basex.query.xpath.item.Nod

All Implemented Interfaces:

Result

public final class Nod
extends Item

XPath Value representing a NodeSet.

Author:

Workgroup DBIS, University of Konstanz 2005-08, ISC License, Tim Petrowsky

Field Summary

int	currPos Current node set position.
int	currSize Current node set size.
Data	data Data reference..
int[]	nodes Node array.
int	size Number of stored values..

Constructor Summary

Nod(Data d)
Constructor, creating a new node set from the specified node ids.

Nod(int[] ids, Data d)
Constructor, creating a new node set from the specified node ids.

Nod(int[] ids, XPContext ctx)
Constructor, creating a new node set from the specified node ids.

Nod(XPContext ctx)
Constructor, creating an empty node set.

Method Summary

boolean	appr(Item v) Checks the approximate equality of the value and the specified value.
boolean	apprContainedIn(Item val) inverse contains (this NodeSet is the argument to val.apprContains).
boolean	apprContains(Item v) Checks whether this value approximately contains the word(s) in val.
boolean	bool() Returns the boolean value.
boolean	eq(Item v) Checks the equality of the value and the specified value.
Nod	eval(XPContext ctx) Evaluates the expression with the specified context set.
boolean	ge(Item v) Checks if the value is greater than or equal to the specified value.
boolean	gt(Item v) Checks if the value is greater than the specified value.
boolean	le(Item v) Checks if the value is less than or equal to the specified value.
boolean	lt(Item v) Checks if the value is less than the specified value.
double	num() Returns the double value.
void	plan(Serializer ser) Recursively sends the abstract syntax of this expression to the specified serializer.
int	prec() Returns the evaluation precedence.
void	serialize(Serializer ser) Serializes the complete result.
void	serialize(Serializer ser, int n) Serializes the specified result.
void	set(int pre) Sets a single node.
int	size() Number of values, stored in the result instance.
byte[]	str() Returns the literal value.
java.lang.String	toString()

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

comp, same, usesPos, usesSize

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

indexEquivalent, indexSizes, returnedValue, sameAs

Methods inherited from class org.basex.query.ExprInfo

color, info, name

Methods inherited from class java.lang.Object

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

Field Detail

nodes

public int[] nodes

Node array.

data

public Data data

Data reference..

size

public int size

Number of stored values..

currPos

public int currPos

Current node set position.

currSize

public int currSize

Current node set size.

Constructor Detail

Nod

public Nod(int[] ids,
           XPContext ctx)

Constructor, creating a new node set from the specified node ids.

Parameters:

ids - node ids

ctx - query context

Nod

public Nod(XPContext ctx)

Constructor, creating an empty node set.

Parameters:

ctx - query context

Nod

public Nod(Data d)

Constructor, creating a new node set from the specified node ids.

Parameters:

d - data reference

Nod

public Nod(int[] ids,
           Data d)

Constructor, creating a new node set from the specified node ids.

Parameters:

ids - node ids

d - data reference

Method Detail

set

public void set(int pre)

Sets a single node.

Parameters:

pre - node to be set.

size

public int size()

Description copied from class: Item

Number of values, stored in the result instance.

Specified by:

size in interface Result

Overrides:

size in class Item

Returns:

number of values

serialize

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

Description copied from class: Item

Serializes the complete result.

Specified by:

serialize in interface Result

Overrides:

serialize in class Item

Parameters:

ser - serializer

Throws:

java.io.IOException - exception

serialize

public void serialize(Serializer ser,
                      int n)
               throws java.io.IOException

Description copied from class: Item

Serializes the specified result.

Specified by:

serialize in interface Result

Overrides:

serialize in class Item

Parameters:

ser - serializer

n - number of result to serialize

Throws:

java.io.IOException - exception

eval

public Nod eval(XPContext ctx)

Description copied from class: Expr

Evaluates the expression with the specified context set. Additionally provides a context

Specified by:

eval in class Expr

Parameters:

ctx - query context

Returns:

resulting XPathValue

bool

public boolean bool()

Description copied from class: Item

Returns the boolean value.

Specified by:

bool in class Item

Returns:

boolean value

str

public byte[] str()

Description copied from class: Item

Returns the literal value.

Specified by:

str in class Item

Returns:

literal value

num

public double num()

Description copied from class: Item

Returns the double value.

Specified by:

num in class Item

Returns:

double value

prec

public int prec()

Description copied from class: Item

Returns the evaluation precedence.

Returns:

evaluation precedence

lt

public boolean lt(Item v)

Description copied from class: Item

Checks if the value is less than the specified value.

Parameters:

v - value to be compared

Returns:

result of comparison.

le

public boolean le(Item v)

Description copied from class: Item

Checks if the value is less than or equal to the specified value.

Parameters:

v - value to be compared

Returns:

result of comparison.

gt

public boolean gt(Item v)

Description copied from class: Item

Checks if the value is greater than the specified value.

Parameters:

v - value to be compared

Returns:

result of comparison.

ge

public boolean ge(Item v)

Description copied from class: Item

Checks if the value is greater than or equal to the specified value.

Parameters:

v - value to be compared

Returns:

result of comparison.

eq

public boolean eq(Item v)

Description copied from class: Item

Checks the equality of the value and the specified value.

Specified by:

eq in class Item

Parameters:

v - value to be compared

Returns:

result of comparison.

appr

public boolean appr(Item v)

Description copied from class: Item

Checks the approximate equality of the value and the specified value.

Parameters:

v - value to be compared

Returns:

result of comparison.

apprContains

public boolean apprContains(Item v)

Description copied from class: Item

Checks whether this value approximately contains the word(s) in val.

Parameters:

v - value to be compared

Returns:

result of comparison.

apprContainedIn

public boolean apprContainedIn(Item val)

inverse contains (this NodeSet is the argument to val.apprContains).

Parameters:

val - value to contain one of these nodes

Returns:

whether val contains one of the node-values in this set

toString

public java.lang.String toString()

Specified by:

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.

Specified by:

plan in class ExprInfo

Parameters:

ser - serializer

Throws:

java.io.IOException - exception