Package org.basex.query.value.seq

Class FltSeq

java.lang.Object

org.basex.query.expr.ExprInfo

org.basex.query.expr.Expr

org.basex.query.value.Value

org.basex.query.value.seq.Seq

org.basex.query.value.seq.FltSeq

All Implemented Interfaces:

Iterable<Item>

public final class FltSeq
extends Seq

Sequence of items of type xs:float, containing at least two of them.

Author:

BaseX Team 2005-24, BSD License, Christian Gruen

Field Summary

Fields inherited from class org.basex.query.value.seq.Seq

size

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

type

Method Summary

Modifier and Type	Method	Description
Value	atomValue(QueryContext qc, InputInfo ii)	Evaluates the expression and returns the atomized items.
void	cache(boolean lazy, InputInfo ii)	Caches data of lazy items (i.e., those implementing the Lazy interface).
boolean	equals(Object obj)	This function is e.g. called by: If.optimize(CompileContext), Switch.optimize(CompileContext), Typeswitch.optimize(CompileContext), in order to discard identical expressions.
static Value	get(float[] values)	Creates a sequence with the specified values.
static Value	get(long size, Value... values)	Creates a typed sequence with the items of the specified values.
Value	insertBefore(long pos, Item item, QueryContext qc)	Inserts an item at the given position into this sequence and returns the resulting sequence.
Flt	itemAt(long pos)	Returns the item at the given position in the value.
static Value	read(DataInput in, Type type, QueryContext qc)	Creates a value from the input stream.
void	refineType()	Computes a more precise sequence type of this value.
Value	remove(long pos, QueryContext qc)	Removes the item at the given position in this sequence and returns the resulting sequence.
Value	reverse(QueryContext qc)	Returns all items of this value in reverse order.
boolean	sameType()	Checks if all items of the sequence are of the same type.
float[]	toJava()	Returns a Java representation of the value.
void	write(DataOutput out)	Writes the data structure to disk.

Methods inherited from class org.basex.query.value.seq.Seq

copyInsert, ddo, description, initialCapacity, insert, item, iter, materialize, materialized, refineType, seqType, simplifyFor, size, subSeq, subsequence, test, toErrorString, toString, toXml

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

accept, checkUp, compactify, compile, copy, count, exprSize, get, has, inline, inlineable, isEmpty, isItem, iter, iterator, refineType, serialize, serialize, serialize, value

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

arg, args, atomItem, atomIter, data, funcType, hasFreeVars, indexAccessible, info, isSimple, markTailCalls, mergeEbv, optimize, optimizePos, simplify, typeCheck, uses, vacuous, visitAll

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

info, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

read

public static Value read(DataInput in,
                         Type type,
                         QueryContext qc)
                  throws IOException,
                         QueryException

Creates a value from the input stream. Called from Store.read(DataInput, QueryContext).

Parameters:

in - data input

type - type

qc - query context

Returns:

value

Throws:

IOException - I/O exception

QueryException - query exception

write

public void write(DataOutput out)
           throws IOException

Description copied from class: Value

Writes the data structure to disk.

Overrides:

write in class Value

Parameters:

out - data output

Throws:

IOException - I/O exception

itemAt

public Flt itemAt(long pos)

Description copied from class: Value

Returns the item at the given position in the value. The specified value must be lie within the valid bounds.

Specified by:

itemAt in class Value

Parameters:

pos - position

Returns:

item

reverse

public Value reverse(QueryContext qc)

Description copied from class: Value

Returns all items of this value in reverse order.

Specified by:

reverse in class Value

Parameters:

qc - query context

Returns:

items in reverse order

toJava

public float[] toJava()

Description copied from class: Value

Returns a Java representation of the value.

Overrides:

toJava in class Seq

Returns:

Java object

equals

public boolean equals(Object obj)

Description copied from class: Expr

This function is e.g. called by:

• If.optimize(CompileContext), Switch.optimize(CompileContext), Typeswitch.optimize(CompileContext), in order to discard identical expressions.
• CmpR.mergeEbv(Expr, boolean, CompileContext) or CmpSR.mergeEbv(Expr, boolean, CompileContext), in order to merge expressions with identical input.
• CmpG.optimize(CompileContext) or CmpV.optimize(CompileContext), in order to pre-evaluate equality tests.
• CmpG.optimize(CompileContext), in order to compare the start and end value.
• PathCache, in order to find identical root values at runtime.

Overrides:

equals in class Seq

get

public static Value get(float[] values)

Creates a sequence with the specified values.

Parameters:

values - values

Returns:

value

get

public static Value get(long size,
                        Value... values)
                 throws QueryException

Creates a typed sequence with the items of the specified values.

Parameters:

size - size of resulting sequence

values - values

Returns:

value

Throws:

QueryException - query exception

cache

public final void cache(boolean lazy,
                        InputInfo ii)

Description copied from class: Value

Caches data of lazy items (i.e., those implementing the Lazy interface). By calling this method, the streaming feature of lazy items will be disabled.

Overrides:

cache in class Seq

Parameters:

lazy - if false, cache immediately. if true, caching is deferred until the data is actually requested

ii - input info (can be null)

atomValue

public Value atomValue(QueryContext qc,
                       InputInfo ii)

Description copied from class: Expr

Evaluates the expression and returns the atomized items.

Overrides:

atomValue in class Seq

Parameters:

qc - query context

ii - input info (can be null); required for those Value instances that have no input info)

Returns:

atomized item

sameType

public final boolean sameType()

Description copied from class: Value

Checks if all items of the sequence are of the same type.

Overrides:

sameType in class Seq

Returns:

result of check

insertBefore

public final Value insertBefore(long pos,
                                Item item,
                                QueryContext qc)

Inserts an item at the given position into this sequence and returns the resulting sequence. Because this function will mostly be invoked recursively, the standard implementation will be called, because its runtime outweighs the possibly higher memory consumption.

Specified by:

insertBefore in class Seq

Parameters:

pos - position at which the item should be inserted, must be between 0 and Seq.size

item - item to insert

qc - query context

Returns:

resulting value

remove

public final Value remove(long pos,
                          QueryContext qc)

Removes the item at the given position in this sequence and returns the resulting sequence. Because this function will mostly be invoked recursively, the standard implementation will be called, because its runtime outweighs the possibly higher memory consumption.

Specified by:

remove in class Seq

Parameters:

pos - position of the item to remove, must be between 0 and Seq.size - 1

qc - query context

Returns:

resulting sequence

refineType

public void refineType()

Description copied from class: Value

Computes a more precise sequence type of this value.

Overrides:

refineType in class Value