Package net.sf.saxon.ma.arrays

Class ArrayItemType

java.lang.Object

net.sf.saxon.type.AnyFunctionType

net.sf.saxon.ma.arrays.ArrayItemType

All Implemented Interfaces:

FunctionItemType, ItemType

public class ArrayItemType
extends AnyFunctionType

An instance of this class represents a specific array item type, for example function(xs:int) as xs:boolean

Field Summary

Fields

Modifier and Type	Field	Description
static final ArrayItemType	ANY_ARRAY_TYPE
static final SequenceType	SINGLE_ARRAY

Fields inherited from class net.sf.saxon.type.AnyFunctionType

ANY_FUNCTION

Constructor Summary

Constructors

Constructor	Description
ArrayItemType(SequenceType memberType)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)	Test whether this array type equals another array type
Optional<String>	explainMismatch(Item item, TypeHierarchy th)	Get extra diagnostic information about why a supplied item does not conform to this item type, if available.
SequenceType[]	getArgumentTypes()	Get the argument types of this array, viewed as a function
int	getArity()	Get the arity (number of arguments) of this function type
PlainType	getAtomizedItemType()	Get the item type of the atomic values that will be produced when an item of this type is atomized
String	getBasicAlphaCode()	Get an alphabetic code representing the type, or at any rate, the nearest built-in type from which this type is derived.
double	getDefaultPriority()	Get the default priority when this ItemType is used as an XSLT pattern
Genre	getGenre()	Determine the Genre (top-level classification) of this type
SequenceType	getMemberType()	Get the type of the members of the array
SequenceType	getResultType()	Get the result type of this array, viewed as a function
int	hashCode()	Returns a hash code value for the object.
boolean	isArrayType()	Ask whether this function item type is an array type.
boolean	isAtomizable(TypeHierarchy th)	Ask whether values of this type are atomizable
boolean	isMapType()	Ask whether this function item type is a map type.
Expression	makeFunctionSequenceCoercer(Expression exp, Supplier<RoleDiagnostic> role, boolean allow40)	Create an expression whose effect is to apply function coercion to coerce a function from this type to another type
boolean	matches(Item item, TypeHierarchy th)	Test whether a given item conforms to this type
Affinity	relationship(FunctionItemType other, TypeHierarchy th)	Determine the relationship of one function item type to another
String	toExportString()	Return a string representation of this ItemType suitable for use in stylesheet export files.
String	toString()	Produce a representation of this type name for use in error messages.

Methods inherited from class net.sf.saxon.type.AnyFunctionType

getAnnotationAssertions, getInstance, getPrimitiveItemType, getPrimitiveType, getUType, isAtomicType, isPlainType

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.saxon.type.ItemType

getFullAlphaCode, getNormalizedDefaultPriority

Field Details

ANY_ARRAY_TYPE

public static final ArrayItemType ANY_ARRAY_TYPE

SINGLE_ARRAY

public static final SequenceType SINGLE_ARRAY

Constructor Details

ArrayItemType

public ArrayItemType(SequenceType memberType)

Method Details

getGenre

public Genre getGenre()

Determine the Genre (top-level classification) of this type

Returns:

the Genre to which this type belongs, specifically Genre.ARRAY

getMemberType

public SequenceType getMemberType()

Get the type of the members of the array

Returns:

the type to which all members of the array must conform

isMapType

public boolean isMapType()

Ask whether this function item type is a map type. In this case function coercion (to the map type) will never succeed.

Specified by:

isMapType in interface FunctionItemType

Overrides:

isMapType in class AnyFunctionType

Returns:

true if this FunctionItemType is a map type

isArrayType

public boolean isArrayType()

Ask whether this function item type is an array type. In this case function coercion (to the array type) will never succeed.

Specified by:

isArrayType in interface FunctionItemType

Overrides:

isArrayType in class AnyFunctionType

Returns:

true if this FunctionItemType is an array type

getBasicAlphaCode

public String getBasicAlphaCode()

Get an alphabetic code representing the type, or at any rate, the nearest built-in type from which this type is derived. The codes are designed so that for any two built-in types A and B, alphaCode(A) is a prefix of alphaCode(B) if and only if A is a supertype of B.

Specified by:

getBasicAlphaCode in interface ItemType

Overrides:

getBasicAlphaCode in class AnyFunctionType

Returns:

the alphacode for the nearest containing built-in type

isAtomizable

public boolean isAtomizable(TypeHierarchy th)

Ask whether values of this type are atomizable

Specified by:

isAtomizable in interface ItemType

Overrides:

isAtomizable in class AnyFunctionType

Parameters:

th - The type hierarchy cache

Returns:

true unless it is known that these items will be elements with element-only content, in which case return false

getAtomizedItemType

public PlainType getAtomizedItemType()

Get the item type of the atomic values that will be produced when an item of this type is atomized

Specified by:

getAtomizedItemType in interface ItemType

Overrides:

getAtomizedItemType in class AnyFunctionType

Returns:

the item type of the atomic values that will be produced when an item of this type is atomized

getArity

public int getArity()

Get the arity (number of arguments) of this function type

Returns:

the number of argument types in the function signature

getArgumentTypes

public SequenceType[] getArgumentTypes()

Get the argument types of this array, viewed as a function

Specified by:

getArgumentTypes in interface FunctionItemType

Overrides:

getArgumentTypes in class AnyFunctionType

Returns:

the list of argument types of this array, viewed as a function

getDefaultPriority

public double getDefaultPriority()

Get the default priority when this ItemType is used as an XSLT pattern

Specified by:

getDefaultPriority in interface ItemType

Overrides:

getDefaultPriority in class AnyFunctionType

Returns:

the default priority

matches

public boolean matches(Item item,
 TypeHierarchy th)

Test whether a given item conforms to this type

Specified by:

matches in interface ItemType

Overrides:

matches in class AnyFunctionType

Parameters:

item - The item to be tested

th - The type hierarchy cache

Returns:

true if the item is an instance of this type; false otherwise

getResultType

public SequenceType getResultType()

Get the result type of this array, viewed as a function

Specified by:

getResultType in interface FunctionItemType

Overrides:

getResultType in class AnyFunctionType

Returns:

the result type of this array, viewed as a function

toString

public String toString()

Produce a representation of this type name for use in error messages.

Overrides:

toString in class AnyFunctionType

Returns:

a string representation of the type, in notation resembling but not necessarily identical to XPath syntax

toExportString

public String toExportString()

Return a string representation of this ItemType suitable for use in stylesheet export files. This differs from the result of toString() in that it will not contain any references to anonymous types. Note that it may also use the Saxon extended syntax for union types and tuple types. The default implementation returns the result of calling toString().

Returns:

the string representation as an instance of the XPath SequenceType construct

equals

public boolean equals(Object other)

Test whether this array type equals another array type

Overrides:

equals in class Object

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class Object

relationship

public Affinity relationship(FunctionItemType other,
 TypeHierarchy th)

Determine the relationship of one function item type to another

Specified by:

relationship in interface FunctionItemType

Overrides:

relationship in class AnyFunctionType

Parameters:

other - the other function item type

th - the type hierarchy cache

Returns:

for example Affinity.SUBSUMES, Affinity.SAME_TYPE

makeFunctionSequenceCoercer

public Expression makeFunctionSequenceCoercer(Expression exp,
 Supplier<RoleDiagnostic> role,
 boolean allow40)
                                       throws XPathException

Description copied from class: AnyFunctionType

Create an expression whose effect is to apply function coercion to coerce a function from this type to another type

Specified by:

makeFunctionSequenceCoercer in interface FunctionItemType

Overrides:

makeFunctionSequenceCoercer in class AnyFunctionType

Parameters:

exp - the expression that delivers the supplied sequence of function items (the ones in need of coercion)

role - information for use in diagnostics

allow40 -

Returns:

the sequence of coerced functions, each on a function that calls the corresponding original function after checking the parameters

Throws:

XPathException - if an error is detected

explainMismatch

public Optional<String> explainMismatch(Item item,
 TypeHierarchy th)

Get extra diagnostic information about why a supplied item does not conform to this item type, if available. If extra information is returned, it should be in the form of a complete sentence, minus the closing full stop. No information should be returned for obvious cases.

Parameters:

item - the item that doesn't match this type

th - the type hierarchy cache

Returns:

optionally, a message explaining why the item does not match the type