net.sf.saxon.functions

Class SuperId

java.lang.Object

net.sf.saxon.om.AbstractItem

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.SuperId

All Implemented Interfaces:

PullEvent, Callable, Function, GroundedValue, Item, Sequence

Direct Known Subclasses:

SuperId.ElementWithId, SuperId.Id

public abstract class SuperId
extends SystemFunction

The XPath id() or element-with-id() function XPath 2.0 version: accepts any sequence as the first parameter; each item in the sequence is taken as an IDREFS value, that is, a space-separated list of ID values. Also accepts an optional second argument to identify the target document, this defaults to the context node.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SuperId.ElementWithId
static class	SuperId.Id

Field Summary

Fields

Modifier and Type	Field and Description
static int	ELEMENT_WITH_ID
static int	ID

Constructor Summary

Constructors

Constructor and Description
SuperId()

Method Summary

Methods

Modifier and Type	Method and Description
Sequence	call(XPathContext context, Sequence[] arguments) Evaluate the expression
static SequenceIterator	getIdMultiple(TreeInfo doc, SequenceIterator idrefs, int operation) Get an iterator over the nodes that have an id equal to one of the values is a set of whitespace separated strings
static SequenceIterator	getIdSingle(TreeInfo doc, String idrefs, int operation) Get an iterator over the nodes that have an id equal to one of the values is a whitespace separated string
abstract int	getOp()
int	getSpecialProperties(Expression[] arguments) Get the static properties of this expression (other than its type).

Methods inherited from class net.sf.saxon.functions.SystemFunction

equals, export, exportAttributes, getArity, getCardinality, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getExpressionCompiler, getFunctionItemType, getFunctionName, getIntegerBounds, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getStaticBaseUriString, getStreamingAdjunct, importAttributes, makeCall, makeFunction, makeFunctionCall, makeOptimizedFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, typeCheckCaller

Methods inherited from class net.sf.saxon.functions.AbstractFunction

atomize, deepEquals, effectiveBooleanValue, getStringValue, getStringValueCS, isArray, isMap, simplify, typeCheck

Methods inherited from class net.sf.saxon.om.AbstractItem

getLength, head, itemAt, iterate, reduce, subsequence

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.saxon.om.Function

iterate

Methods inherited from interface net.sf.saxon.om.Item

head

Methods inherited from interface net.sf.saxon.om.GroundedValue

getLength, head, itemAt, reduce, subsequence

Field Detail

ID

public static final int ID

See Also:

Constant Field Values

ELEMENT_WITH_ID

public static final int ELEMENT_WITH_ID

See Also:

Constant Field Values

Constructor Detail

SuperId

public SuperId()

Method Detail

getOp

public abstract int getOp()

getSpecialProperties

public int getSpecialProperties(Expression[] arguments)

Get the static properties of this expression (other than its type). The result is bit-signficant. These properties are used for optimizations. In general, if property bit is set, it is true, but if it is unset, the value is unknown.

Overrides:

getSpecialProperties in class SystemFunction

Parameters:

arguments - the actual arguments to the call

getIdSingle

public static SequenceIterator getIdSingle(TreeInfo doc,
                           String idrefs,
                           int operation)
                                    throws XPathException

Get an iterator over the nodes that have an id equal to one of the values is a whitespace separated string

Parameters:

doc - The document to be searched

idrefs - a string containing zero or more whitespace-separated ID values to be found in the document

operation - either ID or ELEMENT_WITH_ID

Returns:

an iterator over the nodes whose ID is one of the specified values

Throws:

XPathException - if an error occurs

getIdMultiple

public static SequenceIterator getIdMultiple(TreeInfo doc,
                             SequenceIterator idrefs,
                             int operation)
                                      throws XPathException

Get an iterator over the nodes that have an id equal to one of the values is a set of whitespace separated strings

Parameters:

doc - The document to be searched

idrefs - an iterator over a set of strings each of which is a string containing zero or more whitespace-separated ID values to be found in the document

operation - distinguishes id() and element-with-id()

Returns:

an iterator over the nodes whose ID is one of the specified values

Throws:

XPathException - if an error occurs

call

public Sequence call(XPathContext context,
            Sequence[] arguments)
              throws XPathException

Evaluate the expression

Parameters:

context - the dynamic evaluation context

arguments - the values of the arguments, supplied as SequenceIterators

Returns:

the result of the evaluation, in the form of a SequenceIterator

Throws:

XPathException - if a dynamic error occurs during the evaluation of the expression