org.basex.query.value.item
Class FItem
java.lang.Object
org.basex.data.ExprInfo
org.basex.query.expr.Expr
org.basex.query.value.Value
org.basex.query.value.item.Item
org.basex.query.value.item.FItem
- All Implemented Interfaces:
- java.lang.Iterable<Item>, XQFunction
- Direct Known Subclasses:
- FuncItem, Map
public abstract class FItem
- extends Item
- implements XQFunction
Abstract super class for function items.
- Author:
- BaseX Team 2005-12, BSD License, Leo Woerteler
Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
Expr.Flag |
Fields inherited from class org.basex.query.value.item.Item |
score, UNDEF |
Fields inherited from class org.basex.query.value.Value |
type |
Methods inherited from class org.basex.query.value.item.Item |
bool, castErr, comparable, dbl, dec, description, diff, ebv, equiv, flt, hash, homogeneous, input, isItem, item, itemAt, iter, iterable, itr, materialize, score, score, size, test, type, typeId, writeTo, xdmInfo |
Methods inherited from class org.basex.query.value.Value |
accept, cache, checkUp, compile, copy, count, data, exprSize, has, inline, isValue, iter, iterator, removable, serialize, value |
Methods inherited from class org.basex.query.expr.Expr |
addText, compEbv, copy, hasFreeVars, indexAccessible, indexEquivalent, inlineAll, isEmpty, isFunction, isVacuous, markTailCalls, optimize, sameAs, uses, visitAll |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
FItem
protected FItem(FuncType t)
- Constructor.
- Parameters:
t
- type
invItem
public Item invItem(QueryContext ctx,
InputInfo ii,
Value... args)
throws QueryException
- Description copied from interface:
XQFunction
- Invokes this function with the given arguments.
- Specified by:
invItem
in interface XQFunction
- Parameters:
ctx
- query contextii
- input infoargs
- arguments
- Returns:
- resulting item
- Throws:
QueryException
- query exception
coerceTo
public abstract FItem coerceTo(FuncType ft,
QueryContext ctx,
InputInfo ii)
throws QueryException
- Coerces this function item to the given function type.
- Parameters:
ft
- function typectx
- query contextii
- input info
- Returns:
- coerced item
- Throws:
QueryException
- query exception
string
public final 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, use null
if none is available
- Returns:
- string value
- Throws:
QueryException
- if the item can't be atomized
eq
public final boolean eq(Item it,
Collation coll,
InputInfo ii)
throws QueryException
- Description copied from class:
Item
- Checks the items for equality.
- Specified by:
eq
in class Item
- Parameters:
it
- item to be comparedcoll
- collationii
- input info
- Returns:
- result of check
- Throws:
QueryException
- query exception
toJava
public java.lang.Object 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
plan
public abstract void plan(FElem root)
- Description copied from class:
ExprInfo
- Creates an expression tree.
- Overrides:
plan
in class Item
- Parameters:
root
- root element