Package net.sf.saxon.functions

Class Translate

java.lang.Object

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.Translate

All Implemented Interfaces:

Callable, StatefulSystemFunction, FunctionItem, GroundedValue, Item, Sequence

public class Translate
extends SystemFunction
implements Callable, StatefulSystemFunction

Implement the XPath translate() function

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Translate.TranslateFnElaborator

Constructor Summary

Constructors

Constructor	Description
Translate()

Method Summary

Modifier and Type	Method	Description
StringValue	call(XPathContext context, Sequence[] arguments)	Evaluate the expression
Translate	copy()	Make a copy of this SystemFunction.
Expression	fixArguments(Expression... arguments)	Allow the function to create an optimized call based on the values of the actual arguments
Elaborator	getElaborator()	Make an elaborator for a system function call on this function
IntToIntMap	getStaticMap()	Get the translation map built at compile time if there is one
static StringValue	translate(StringValue sv0, StringValue sv1, StringValue sv2)	Perform the translate function
static StringValue	translateUsingMap(StringValue in, IntToIntMap map)	Implement the translate() function using an index built at compile time

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

dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, getArity, getCardinality, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, getStreamerName, getUniStringArg, hashCode, importAttributes, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, makeFunction40, makeFunctionCall, makeOptimizedFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, toShortString, toString, typeCheckCaller

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

atomize, deepEqual40, deepEquals, effectiveBooleanValue, getAnnotations, getUnicodeStringValue, isArray, isMap, makeNewContext, simplify, typeCheck

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

getGenre

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

asIterable, concatenate, containsNode, materialize

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

getLength, getStringValue, head, isStreamed, itemAt, iterate, reduce, subsequence

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

makeRepeatable

Constructor Details

Translate

public Translate()

Method Details

fixArguments

public Expression fixArguments(Expression... arguments)

Allow the function to create an optimized call based on the values of the actual arguments

Overrides:

fixArguments in class SystemFunction

Parameters:

arguments - the supplied arguments to the function call

Returns:

either a function call on this function, or an expression that delivers the same result, or null indicating that no optimization has taken place

getStaticMap

public IntToIntMap getStaticMap()

Get the translation map built at compile time if there is one

Returns:

the map built at compile time, or null if not available

translate

public static StringValue translate(StringValue sv0,
 StringValue sv1,
 StringValue sv2)

Perform the translate function

Parameters:

sv0 - the string to be translated

sv1 - the characters to be substituted

sv2 - the replacement characters

Returns:

the converted string

translateUsingMap

public static StringValue translateUsingMap(StringValue in,
 IntToIntMap map)

Implement the translate() function using an index built at compile time

Parameters:

in - the string to be translated

map - index built at compile time, mapping input characters to output characters. The map returns -1 for a character that is to be deleted from the input string, Integer.MAX_VALUE for a character that is to remain intact

Returns:

the translated character string

call

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

Evaluate the expression

Specified by:

call in interface Callable

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

copy

public Translate copy()

Make a copy of this SystemFunction. This is required only for system functions such as regex functions that maintain state on behalf of a particular caller.

Specified by:

copy in interface StatefulSystemFunction

Returns:

a copy of the system function able to contain its own copy of the state on behalf of the caller.

getElaborator

public Elaborator getElaborator()

Make an elaborator for a system function call on this function

Overrides:

getElaborator in class SystemFunction

Returns:

a suitable elaborator; or null if no custom elaborator is available