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:

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

Modifier and Type	Method and Description
StringValue	call(XPathContext context, Sequence[] arguments) Evaluate the expression
java.lang.String	getStreamerName() Get a name that identifies the class that can be used to evaluate this function in streaming mode, that is, supplying one item or event at a time as it is delivered by the parser.
static java.lang.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

dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCardinality, getCompilerName, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, importAttributes, isTrustedResultType, makeCall, makeFunction, makeFunctionCall, makeOptimizedFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, typeCheckCaller

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

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

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

getLength, head, isStreamed, 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 java.lang.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

getStreamerName

public java.lang.String getStreamerName()

Description copied from class: SystemFunction

Get a name that identifies the class that can be used to evaluate this function in streaming mode, that is, supplying one item or event at a time as it is delivered by the parser. Special streaming support is generally available in Saxon-EE for all system functions that take a sequence as their argument.

Overrides:

getStreamerName in class SystemFunction

Returns:

a name that identifies a class that supports streamed evaluation of this system function, or null if no such class is available. The mapping of names to classes is defined in the Saxon-EE class StreamerMap. In non-streaming Saxon editions (HE and PE) the method always returns null.