org.basex.query.item

Class IntSeq

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.IntSeq

All Implemented Interfaces:

java.lang.Iterable<Item>

public final class IntSeq
extends Seq

Sequence of Integers, containing at least two of them.

Author:

BaseX Team 2005-12, BSD License, Leo Woerteler

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

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.
static Value	get(Expr[] expr, long size, Type type) Creates a sequence with the integers in the specified expressions.
static Value	get(long[] val, Type type) Creates a sequence with the specified integers.
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.
void	plan(Serializer ser) Serializes the expression tree.
long[]	toJava() Returns a Java representation of the value.
SeqType	type() Returns the sequence type of the evaluated value.
int	writeTo(Item[] arr, int start) 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, toString

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, iterable, markTailCalls, sameAs

Methods inherited from class java.lang.Object

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

Method Detail

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

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

toJava

public long[] toJava()

Description copied from class: Value

Returns a Java representation of the value.

Specified by:

toJava in class Value

Returns:

Java object

writeTo

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

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

start - start position

Returns:

number of written items

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

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

get

public static Value get(long[] val,
        Type type)

Creates a sequence with the specified integers.

Parameters:

val - integers

type - type

Returns:

value

get

public static Value get(Expr[] expr,
        long size,
        Type type)
                 throws QueryException

Creates a sequence with the integers in the specified expressions.

Parameters:

expr - expressions

size - size of resulting sequence

type - type

Returns:

value

Throws:

QueryException - query exception