net.sf.saxon.functions

Class CodepointsToString

java.lang.Object

net.sf.saxon.om.AbstractItem

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.CodepointsToString

All Implemented Interfaces:

PullEvent, Callable, Function, GroundedValue, Item, Sequence

public class CodepointsToString
extends SystemFunction
implements Callable

This class implements the function fn:codepoints-to-string()

Constructor Summary

Constructors

Constructor and Description
CodepointsToString()

Method Summary

Methods

Modifier and Type	Method and Description
StringValue	call(XPathContext context, Sequence[] arguments) Evaluate the expression
StreamingAdjunct	getStreamingAdjunct() Get a class that supports streamed evaluation of this expression
static CharSequence	unicodeToString(SequenceIterator chars, IntPredicate checker) Return the Unicode string corresponding to a given sequence of Unicode code values

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, getSpecialProperties, getStaticBaseUriString, 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, optimize, 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

Constructor Detail

CodepointsToString

public CodepointsToString()

Method Detail

unicodeToString

public static CharSequence unicodeToString(SequenceIterator chars,
                           IntPredicate checker)
                                    throws XPathException

Return the Unicode string corresponding to a given sequence of Unicode code values

Parameters:

chars - iterator delivering the characters as integer values

checker - used to test whether a character is valid in the appropriate XML version

Returns:

the sequence of characters as a CharSequence

Throws:

XPathException - if any of the integers is not the codepoint of a valid XML character

call

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

Evaluate the expression

Specified by:

call in interface Callable

Specified by:

call in interface Function

Parameters:

context - the dynamic evaluation context

arguments - the values of the arguments, supplied as Sequences

Returns:

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

Throws:

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

getStreamingAdjunct

public StreamingAdjunct getStreamingAdjunct()

Description copied from class: SystemFunction

Get a class that supports streamed evaluation of this expression

Overrides:

getStreamingAdjunct in class SystemFunction

Returns:

the relevant StreamingAdjunct, or null if none is available