Package org.basex.query.value.item

Class StrLazy

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.item.AStr

org.basex.query.value.item.StrLazy

All Implemented Interfaces:

Iterable<Item>, Lazy

public final class StrLazy
extends AStr
implements Lazy

Lazy string item (xs:string).

Author:

BaseX Team 2005-21, BSD License, Christian Gruen

Field Summary

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
StrLazy(IO input, String encoding, QueryError error, boolean validate)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	cache(boolean lazy, InputInfo ii)	Caches lazy values.
void	cache(InputInfo ii)	Caches the value.
boolean	equals(Object obj)	This function is e.g.
BufferInput	input(InputInfo ii)	Returns an input stream.
boolean	isCached()	Indicates if the contents of this item have been cached.
void	plan(QueryString qs)	Creates a query string.
byte[]	string(InputInfo ii)	Returns a string representation of the value.
String	toJava()	Returns a Java representation of the value.

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

bool, comparable, diff, eq, sameKey

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

atomItem, atomSize, atomValue, dbl, ddo, dec, description, ebv, equiv, flt, hash, instanceOf, item, itemAt, iter, itr, materialize, persistent, plan, refineType, reverse, score, seqType, size, subsequence, test, typeId, xdmInfo

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, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

StrLazy

public StrLazy(IO input,
 String encoding,
 QueryError error,
 boolean validate)

Constructor.

Parameters:

input - input

encoding - encoding (can be null)

error - error message to be thrown

validate - validate flag

Method Details

string

public byte[] string(InputInfo ii)
              throws QueryException

Description copied from class: Item

Returns a string representation of the value.

Specified by:

string in class Item

Parameters:

ii - input info (can be null)

Returns:

string value

Throws:

QueryException - if the item cannot be atomized (caused by function or streaming items)

toJava

public String toJava()
              throws QueryException

Description copied from class: Value

Returns a Java representation of the value.

Specified by:

toJava in class Value

Returns:

Java object

Throws:

QueryException - query exception

input

public BufferInput input(InputInfo ii)
                  throws QueryException

Description copied from class: Item

Returns an input stream.

Overrides:

input in class Item

Parameters:

ii - input info (can be null)

Returns:

input stream

Throws:

QueryException - query exception

cache

public void cache(boolean lazy,
 InputInfo ii)
           throws QueryException

Description copied from class: Item

Caches lazy values. Overwritten by Lazy, XQMap and XQArray.

Overrides:

cache in class Item

Parameters:

lazy - lazy caching

ii - input info

Throws:

QueryException - query exception

cache

public void cache(InputInfo ii)
           throws QueryException

Description copied from interface: Lazy

Caches the value.

Specified by:

cache in interface Lazy

Parameters:

ii - input info

Throws:

QueryException - query exception

isCached

public boolean isCached()

Description copied from interface: Lazy

Indicates if the contents of this item have been cached.

Specified by:

isCached in interface Lazy

Returns:

result of check

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 AStr

plan

public void plan(QueryString qs)

Description copied from class: ExprInfo

Creates a query string.

Overrides:

plan in class AStr

Parameters:

qs - query string builder