org.basex.query.item

Class RangeSeq

java.lang.Object

org.basex.data.ExprInfo

org.basex.query.expr.Expr

org.basex.query.item.Value

org.basex.query.item.Seq

org.basex.query.item.RangeSeq

All Implemented Interfaces:

java.lang.Iterable<Item>

public final class RangeSeq
extends Seq

Range sequence, containing at least two integers.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Nested Class Summary

Nested classes/interfaces inherited from class org.basex.query.expr.Expr

Expr.Use

Field Summary

Fields inherited from class org.basex.query.item.Value

type

Constructor Summary

Constructors

Constructor and Description
RangeSeq(long s, long sz) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
Item	ebv(QueryContext ctx, InputInfo ii) Checks if the iterator can be dissolved into an effective boolean value.
boolean	homogenous() Checks if all items of this value share the same type.
Item	itemAt(long pos) Gets the item at the given position in the value.
boolean	iterable() Returns true if the expression is iterable, i.e., if it does not contain any duplicates and if all results are sorted.
void	plan(Serializer ser) Serializes the expression tree.
java.lang.Object	toJava() Returns a Java representation of the value.
java.lang.String	toString()
SeqType	type() Returns the sequence type of the evaluated value.
int	writeTo(Item[] arr, int pos) Writes this value's items out to the given array.

Methods inherited from class org.basex.query.item.Seq

get, hash, item, iter, size, test

Methods inherited from class org.basex.query.item.Value

cache, comp, count, data, description, info, isValue, iter, iterator, removable, remove, uses, value

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

addText, compEbv, hasFreeVars, indexAccessible, indexEquivalent, isEmpty, isFunction, isItem, isVacuous, markTailCalls, sameAs

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RangeSeq

public RangeSeq(long s,
        long sz)

Constructor.

Parameters:

s - start value

sz - size

Method Detail

toJava

public java.lang.Object toJava()

Description copied from class: Value

Returns a Java representation of the value.

Specified by:

toJava in class Value

Returns:

Java object

ebv

public Item ebv(QueryContext ctx,
       InputInfo ii)
         throws QueryException

Description copied from class: Expr

Checks if the iterator can be dissolved into an effective boolean value. If not, returns an error. If yes, returns the first value - which can be also be e.g. an integer, which is later evaluated as numeric predicate.

Specified by:

ebv in class Expr

Parameters:

ctx - query context

ii - input info

Returns:

item

Throws:

QueryException - query exception

type

public SeqType type()

Description copied from class: Expr

Returns the sequence type of the evaluated value. For simplicity, some types have been summarized. E.g., all numbers are treated as integers.

Specified by:

type in class Expr

Returns:

result of check

iterable

public boolean iterable()

Description copied from class: Expr

Returns true if the expression is iterable, i.e., if it does not contain any duplicates and if all results are sorted. This method is called e.g. by AxisPath.

Overrides:

iterable in class Expr

Returns:

result of check

writeTo

public int writeTo(Item[] arr,
          int pos)

Description copied from class: Value

Writes this value's items out to the given array.

Specified by:

writeTo in class Value

Parameters:

arr - array to write to

pos - start position

Returns:

number of written items

itemAt

public Item itemAt(long pos)

Description copied from class: Value

Gets the item at the given position in the value.

Specified by:

itemAt in class Value

Parameters:

pos - position

Returns:

item

homogenous

public boolean homogenous()

Description copied from class: Value

Checks if all items of this value share the same type.

Specified by:

homogenous in class Value

Returns:

result of check

plan

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

Description copied from class: ExprInfo

Serializes the expression tree.

Specified by:

plan in class ExprInfo

Parameters:

ser - serializer

Throws:

java.io.IOException - I/O exception

toString

public java.lang.String toString()

Overrides:

toString in class Seq