Package org.basex.query.value.node

Class FAttr

java.lang.Object

org.basex.query.expr.ExprInfo

org.basex.query.expr.Expr

org.basex.query.value.Value

org.basex.query.value.item.Item

org.basex.query.value.node.ANode

org.basex.query.value.node.FNode

org.basex.query.value.node.FAttr

All Implemented Interfaces:

Iterable<Item>

public final class FAttr
extends FNode

Attribute node fragment.

Author:

BaseX Team 2005-21, BSD License, Christian Gruen

Field Summary

Fields inherited from class org.basex.query.value.node.ANode

id

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

UNDEF

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

type

Constructor Summary

Constructors

Constructor	Description
FAttr(byte[] name, byte[] value)	Constructor for creating an attribute.
FAttr(String name, String value)	Constructor for creating an attribute.
FAttr(QNm name, byte[] value)	Default constructor.
FAttr(Attr attr)	Constructor for creating an attribute from a DOM node.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	This function is e.g.
FAttr	materialize(QueryContext qc, boolean copy)	Returns a materialized, context-independent version of this item.
byte[]	name()	Returns the name (optional prefix, local name) of an attribute, element or processing instruction.
void	plan(QueryPlan plan)	Creates a query plan.
void	plan(QueryString qs)	Creates a query string.
QNm	qname()	Returns the QName (optional prefix, local name) of an attribute, element or processing instruction.
byte[]	xdmInfo()	Returns data model info.

Methods inherited from class org.basex.query.value.node.FNode

attributeIter, childIter, descendantIter, descendantOrSelfIter, diff, finish, hasChildren, hashCode, is, parent, parent, string, toJava

Methods inherited from class org.basex.query.value.node.ANode

ancestorIter, ancestorOrSelfIter, atomItem, atomItem, atomValue, attribute, attribute, baseURI, bool, comparable, copy, copy, ddo, diff, eq, followingIter, followingSiblingIter, kind, kind, namespaces, nodeType, nsScope, optimize, parentIter, precedingIter, precedingSiblingIter, root, sameKey, selfIter, string, type, uri

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

atomSize, cache, dbl, dec, description, ebv, equiv, flt, hash, input, instanceOf, item, itemAt, iter, itr, persistent, refineType, reverse, score, seqType, size, subsequence, test, typeId

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

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

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

arg, args, atomIter, data, data, funcType, hasFreeVars, indexAccessible, isSimple, markTailCalls, mergeEbv, optimize, simplifyFor, typeCheck, uses, vacuous, visitAll

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

toErrorString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

FAttr

public FAttr(String name,
 String value)

Constructor for creating an attribute. QNames will be cached and reused.

Parameters:

name - name

value - value

FAttr

public FAttr(byte[] name,
 byte[] value)

Constructor for creating an attribute. QNames will be cached and reused.

Parameters:

name - name

value - value

FAttr

public FAttr(QNm name,
 byte[] value)

Default constructor.

Parameters:

name - name

value - value

FAttr

public FAttr(Attr attr)

Constructor for creating an attribute from a DOM node. Originally provided by Erdal Karaca.

Parameters:

attr - DOM node

Method Details

qname

public QNm qname()

Description copied from class: ANode

Returns the QName (optional prefix, local name) of an attribute, element or processing instruction.

Overrides:

qname in class ANode

Returns:

name, or null if node has no QName

name

public byte[] name()

Description copied from class: ANode

Returns the name (optional prefix, local name) of an attribute, element or processing instruction. This function is possibly evaluated faster than ANode.qname(), as no QNm instance may need to be created.

Overrides:

name in class ANode

Returns:

name, or null if node has no name

materialize

public FAttr materialize(QueryContext qc,
 boolean copy)

Description copied from class: Item

Returns a materialized, context-independent version of this item.

Specified by:

materialize in class ANode

Parameters:

qc - query context (if null, process cannot be interrupted)

copy - create full copy

Returns:

item copy, or null) if the item cannot be materialized

xdmInfo

public byte[] xdmInfo()

Description copied from class: Item

Returns data model info. Overwritten by QNm, DBNode, FTxt and FDoc.

Overrides:

xdmInfo in class Item

Returns:

type string

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) or Pos.get(Expr, CmpV.OpV, InputInfo, CompileContext), in order to compare the start and end value.
• PathCache, in order to find identical root values at runtime.

Overrides:

equals in class FNode

plan

public void plan(QueryPlan plan)

Description copied from class: ExprInfo

Creates a query plan.

Overrides:

plan in class Item

Parameters:

plan - expression plan

plan

public void plan(QueryString qs)

Description copied from class: ExprInfo

Creates a query string.

Specified by:

plan in class ExprInfo

Parameters:

qs - query string builder