Class ExternalObjectType

java.lang.Object
net.sf.saxon.type.ExternalObjectType
All Implemented Interfaces:
Serializable, AtomicType, ItemType, PlainType, SchemaComponent, SchemaType, SimpleType
public class ExternalObjectType extends Object implements AtomicType, Serializable
This class represents the type of an external Java object returned by an extension function, or supplied as an external variable/parameter.
See Also:

  • Field Details

    • fingerprint

      int fingerprint

  • Constructor Details

    • ExternalObjectType

      public ExternalObjectType(Class javaClass)
      Create an anonymous external object type. When constructed this way, the type will not have a nameCode or fingerprint in the name pool, so methods asking for the name of the type will return no value.
      Parameters:
      javaClass - the Java class to which this type corresponds

    • ExternalObjectType

      public ExternalObjectType(Class javaClass, Configuration config)
      Create an external object type. When constructed this way, the type will have a fingerprint in the name pool based on the Java class name
      Parameters:
      javaClass - the Java class to which this type corresponds
      config - the Saxon configuration

  • Method Details

    • getName

      public String getName()
      Get the local name of this type
      Specified by:
      getName in interface SchemaType
      Returns:
      the local name of this type definition, if it has one. Return null in the case of an anonymous type.

    • getTargetNamespace

      public String getTargetNamespace()
      Get the target namespace of this type
      Specified by:
      getTargetNamespace in interface SchemaType
      Returns:
      the target namespace of this type definition, if it has one. Return null in the case of an anonymous type, and in the case of a global type defined in a no-namespace schema.

    • isExternalType

      public boolean isExternalType()
      Return true if this is an external object type, that is, a Saxon-defined type for external Java or .NET objects
      Specified by:
      isExternalType in interface PlainType
      Specified by:
      isExternalType in interface SimpleType
      Returns:
      true if this is an external type

    • isBuiltInType

      public boolean isBuiltInType()
      Determine whether this is a built-in type or a user-defined type
      Specified by:
      isBuiltInType in interface AtomicType
      Specified by:
      isBuiltInType in interface SimpleType
      Returns:
      false - external types are not built in

    • getTypeName

      public StructuredQName getTypeName()
      Get the name of this type as a StructuredQName, unless the type is anonymous, in which case return null
      Specified by:
      getTypeName in interface AtomicType
      Returns:
      the name of the atomic type, or null if the type is anonymous.

    • getRedefinitionLevel

      public int getRedefinitionLevel()
      Get the redefinition level. This is zero for a component that has not been redefined; for a redefinition of a level-0 component, it is 1; for a redefinition of a level-N component, it is N+1. This concept is used to support the notion of "pervasive" redefinition: if a component is redefined at several levels, the top level wins, but it is an error to have two versions of the component at the same redefinition level.
      Specified by:
      getRedefinitionLevel in interface SchemaComponent
      Returns:
      the redefinition level

    • isAbstract

      public boolean isAbstract()
      Determine whether the type is abstract, that is, whether it cannot have instances that are not also instances of some concrete subtype
      Specified by:
      isAbstract in interface AtomicType
      Returns:
      false - external types are not abstract

    • isPrimitiveType

      public boolean isPrimitiveType()
      Determine whether the atomic type is a primitive type. The primitive types are the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration; xs:untypedAtomic; and all supertypes of these (xs:anyAtomicType, xs:numeric, ...)
      Specified by:
      isPrimitiveType in interface AtomicType
      Returns:
      true if the type is considered primitive under the above rules

    • isOrdered

      public boolean isOrdered()
      Determine whether the atomic type is ordered, that is, whether less-than and greater-than comparisons are permitted
      Specified by:
      isOrdered in interface AtomicType
      Returns:
      true if ordering operations are permitted

    • isPlainType

      public boolean isPlainType()
      Ask whether this is a plain type (a type whose instances are always atomic values)
      Specified by:
      isPlainType in interface ItemType
      Returns:
      true

    • getSystemId

      public String getSystemId()
      Get the URI of the schema document where the type was originally defined.
      Specified by:
      getSystemId in interface SchemaType
      Returns:
      the URI of the schema document. Returns null if the information is unknown or if this is a built-in type

    • getValidationStatus

      public final int getValidationStatus()
      Get the validation status - always valid
      Specified by:
      getValidationStatus in interface SchemaComponent
      Returns:
      one of the values SchemaComponent.UNVALIDATED, SchemaComponent.VALIDATING, SchemaComponent.VALIDATED, SchemaComponent.INVALID, SchemaComponent.INCOMPLETE

    • getBlock

      public final int getBlock()
      Returns the value of the 'block' attribute for this type, as a bit-signnificant integer with fields such as SchemaType.DERIVATION_LIST and SchemaType.DERIVATION_EXTENSION
      Specified by:
      getBlock in interface SchemaType
      Returns:
      the value of the 'block' attribute for this type

    • getDerivationMethod

      public final int getDerivationMethod()
      Gets the integer code of the derivation method used to derive this type from its parent. Returns zero for primitive types.
      Specified by:
      getDerivationMethod in interface SchemaType
      Returns:
      a numeric code representing the derivation method, for example SchemaType.DERIVATION_RESTRICTION

    • allowsDerivation

      public final boolean allowsDerivation(int derivation)
      Determines whether derivation (of a particular kind) from this type is allowed, based on the "final" property
      Specified by:
      allowsDerivation in interface SchemaType
      Parameters:
      derivation - the kind of derivation, for example SchemaType.DERIVATION_LIST
      Returns:
      true if this kind of derivation is allowed

    • getNameCode

      public int getNameCode()
      Get the namecode of the name of this type. This includes the prefix from the original type declaration: in the case of built-in types, there may be a conventional prefix or there may be no prefix.
      Specified by:
      getNameCode in interface SchemaType
      Returns:
      the namecode. Returns an invented namecode for an anonymous type.

    • isComplexType

      public final boolean isComplexType()
      Test whether this SchemaType is a complex type
      Specified by:
      isComplexType in interface SchemaType
      Returns:
      true if this SchemaType is a complex type

    • getBaseType

      public final SchemaType getBaseType()
      Returns the base type that this type inherits from. This method can be used to get the base type of a type that is known to be valid. If this type is a Simpletype that is a built in primitive type then null is returned.
      Specified by:
      getBaseType in interface SchemaType
      Returns:
      the base type.
      Throws:
      IllegalStateException - if this type is not valid.

    • getPrimitiveItemType

      public ItemType getPrimitiveItemType()
      Get the primitive item type corresponding to this item type. For item(), this is Type.ITEM. For node(), it is Type.NODE. For specific node kinds, it is the value representing the node kind, for example Type.ELEMENT. For anyAtomicValue it is Type.ATOMIC_VALUE. For numeric it is Type.NUMBER. For other atomic types it is the primitive type as defined in XML Schema, except that INTEGER is considered to be a primitive type.
      Specified by:
      getPrimitiveItemType in interface ItemType
      Returns:
      the corresponding primitive type

    • getPrimitiveType

      public int getPrimitiveType()
      Get the primitive type corresponding to this item type. For item(), this is Type.ITEM. For node(), it is Type.NODE. For specific node kinds, it is the value representing the node kind, for example Type.ELEMENT. For anyAtomicValue it is Type.ATOMIC. For numeric it is Type.NUMBER. For other atomic types it is the primitive type as defined in XML Schema, except that INTEGER is considered to be a primitive type.
      Specified by:
      getPrimitiveType in interface ItemType
      Returns:
      the integer fingerprint of the corresponding primitive type

    • toString

      public String toString(NamePool pool)
      Produce a representation of this type name for use in error messages. Where this is a QName, it will use conventional prefixes
      Specified by:
      toString in interface ItemType
      Parameters:
      pool - the name pool
      Returns:
      a string representation of the type, in notation resembling but not necessarily identical to XPath syntax

    • getAtomizedItemType

      public AtomicType 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
      Returns:
      the best available item type of the atomic values that will be produced when an item of this type is atomized

    • isAtomizable

      public boolean isAtomizable()
      Ask whether values of this type are atomizable
      Specified by:
      isAtomizable in interface ItemType
      Returns:
      true unless it is known that these items will be elements with element-only content, in which case return false

    • getKnownBaseType

      public SchemaType getKnownBaseType()
      Returns the base type that this type inherits from. This method can be used to get the base type of a type that is known to be valid. If this type is a Simpletype that is a built in primitive type then null is returned.
      Returns:
      the base type.
      Throws:
      IllegalStateException - if this type is not valid.

    • isSameType

      public boolean isSameType(SchemaType other)
      Test whether this is the same type as another type. They are considered to be the same type if they are derived from the same type definition in the original XML representation (which can happen when there are multiple includes of the same file)
      Specified by:
      isSameType in interface SchemaType
      Parameters:
      other - the other type
      Returns:
      true if this is the same type as other

    • getRelationship

      public int getRelationship(ExternalObjectType other)
      Get the relationship of this external object type to another external object type
      Parameters:
      other - the other external object type
      Returns:
      the relationship of this external object type to another external object type, as one of the constants in class TypeHierarchy, for example TypeHierarchy.SUBSUMES

    • getDescription

      public String getDescription()
      Description copied from interface: SchemaType
      Get a description of this type for use in error messages. This is the same as the display name in the case of named types; for anonymous types it identifies the type by its position in a source schema document.
      Specified by:
      getDescription in interface SchemaType
      Returns:
      text identifing the type, for use in a phrase such as "the type XXXX".

    • checkTypeDerivationIsOK

      public void checkTypeDerivationIsOK(SchemaType type, int block) throws SchemaException
      Check that this type is validly derived from a given type
      Specified by:
      checkTypeDerivationIsOK in interface SchemaType
      Parameters:
      type - the type from which this type is derived
      block - the derivations that are blocked by the relevant element declaration
      Throws:
      SchemaException - if the derivation is not allowed

    • isSimpleType

      public final boolean isSimpleType()
      Returns true if this SchemaType is a SimpleType
      Specified by:
      isSimpleType in interface SchemaType
      Returns:
      true (always)

    • isAtomicType

      public boolean isAtomicType()
      Test whether this Simple Type is an atomic type
      Specified by:
      isAtomicType in interface ItemType
      Specified by:
      isAtomicType in interface SchemaType
      Specified by:
      isAtomicType in interface SimpleType
      Returns:
      true, this is considered to be an atomic type

    • isIdType

      public boolean isIdType()
      Ask whether this type is an ID type. This is defined to be any simple type who typed value may contain atomic values of type xs:ID: that is, it includes types derived from ID by restriction, list, or union. Note that for a node to be treated as an ID, its typed value must be a *single* atomic value of type ID; the type of the node, however, can still allow a list.
      Specified by:
      isIdType in interface SchemaType
      Returns:
      true if this type is an ID type

    • isIdRefType

      public boolean isIdRefType()
      Ask whether this type is an IDREF or IDREFS type. This is defined to be any simple type who typed value may contain atomic values of type xs:IDREF: that is, it includes types derived from IDREF or IDREFS by restriction, list, or union
      Specified by:
      isIdRefType in interface SchemaType
      Returns:
      true if this type is an IDREF type

    • isListType

      public boolean isListType()
      Returns true if this type is derived by list, or if it is derived by restriction from a list type, or if it is a union that contains a list as one of its members
      Specified by:
      isListType in interface SimpleType
      Returns:
      true if this is a list type

    • isUnionType

      public boolean isUnionType()
      Return true if this type is a union type (that is, if its variety is union)
      Specified by:
      isUnionType in interface SimpleType
      Returns:
      true for a union type

    • getWhitespaceAction

      public int getWhitespaceAction()
      Determine the whitespace normalization required for values of this type
      Specified by:
      getWhitespaceAction in interface SimpleType
      Returns:
      one of PRESERVE, REPLACE, COLLAPSE

    • applyWhitespaceNormalization

      public CharSequence applyWhitespaceNormalization(CharSequence value) throws ValidationException
      Apply the whitespace normalization rules for this simple type
      Parameters:
      value - the string before whitespace normalization
      Returns:
      the string after whitespace normalization
      Throws:
      ValidationException

    • getBuiltInBaseType

      public SchemaType getBuiltInBaseType()
      Returns the built-in base type this type is derived from.
      Specified by:
      getBuiltInBaseType in interface SimpleType
      Returns:
      the first built-in type found when searching up the type hierarchy

    • isNamespaceSensitive

      public boolean isNamespaceSensitive()
      Test whether this simple type is namespace-sensitive, that is, whether it is derived from xs:QName or xs:NOTATION
      Specified by:
      isNamespaceSensitive in interface SimpleType
      Returns:
      true if this type is derived from xs:QName or xs:NOTATION

    • isAnonymousType

      public boolean isAnonymousType()
      Test whether this is an anonymous type
      Specified by:
      isAnonymousType in interface SchemaType
      Returns:
      true if this SchemaType is an anonymous type

    • getTypedValue

      public final SequenceIterator getTypedValue(NodeInfo node)
      Get the typed value of a node that is annotated with this schema type
      Specified by:
      getTypedValue in interface SchemaType
      Parameters:
      node - the node whose typed value is required
      Returns:
      an iterator over the items making up the typed value of this node. The objects returned by this SequenceIterator will all be of type AtomicValue

    • atomize

      public Value atomize(NodeInfo node) throws XPathException
      Get the typed value of a node that is annotated with this schema type. The result of this method will always be consistent with the method getTypedValue(NodeInfo). However, this method is often more convenient and may be more efficient, especially in the common case where the value is expected to be a singleton.
      Specified by:
      atomize in interface SchemaType
      Parameters:
      node - the node whose typed value is required
      Returns:
      the typed value.
      Throws:
      XPathException - if the node cannot be atomized, for example if this is a complex type with element-only content
      Since:
      8.5

    • getTypedValue

      public SequenceIterator getTypedValue(CharSequence value, NamespaceResolver resolver, ConversionRules rules) throws ValidationException
      Get the typed value corresponding to a given string value, assuming it is valid against this type
      Specified by:
      getTypedValue in interface SimpleType
      Parameters:
      value - the string value
      resolver - a namespace resolver used to resolve any namespace prefixes appearing in the content of values. Can supply null, in which case any namespace-sensitive content will be rejected.
      rules -
      Returns:
      an iterator over the atomic sequence comprising the typed value. The objects returned by this SequenceIterator will all be of type AtomicValue
      Throws:
      ValidationException - if the supplied value is not in the lexical space of the data type

    • validate

      public ValidationFailure validate(AtomicValue primValue, CharSequence lexicalValue, ConversionRules rules)
      Validate that a primitive atomic value is a valid instance of a type derived from the same primitive type.
      Specified by:
      validate in interface AtomicType
      Parameters:
      primValue - the value in the value space of the primitive type.
      lexicalValue - the value in the lexical space. If null, the string value of primValue is used. This value is checked against the pattern facet (if any)
      rules -
      Returns:
      null if the value is valid; otherwise, a ValidationFailure object indicating the nature of the error.
      Throws:
      UnsupportedOperationException - in the case of an external object type

    • analyzeContentExpression

      public void analyzeContentExpression(Expression expression, int kind, StaticContext env) throws XPathException
      Analyze an expression to see whether the expression is capable of delivering a value of this type.
      Specified by:
      analyzeContentExpression in interface SchemaType
      Parameters:
      expression - the expression that delivers the content
      kind - the node kind whose content is being delivered: Type.ELEMENT, Type.ATTRIBUTE, or Type.DOCUMENT
      env - the static evaluation context
      Throws:
      XPathException - if the expression will never deliver a value of the correct type

    • analyzeContentExpression

      public static void analyzeContentExpression(SimpleType simpleType, Expression expression, StaticContext env, int kind) throws XPathException
      Analyze an expression to see whether the expression is capable of delivering a value of this type.
      Parameters:
      simpleType - the simple type against which the expression is to be checked
      expression - the expression that delivers the content
      env - the static evaluation context
      kind - the node kind whose content is being delivered: Type.ELEMENT, Type.ATTRIBUTE, or Type.DOCUMENT
      Throws:
      XPathException - if the expression will never deliver a value of the correct type

    • getJavaClass

      public Class getJavaClass()
      Get the Java class to which this external object type corresponds
      Returns:
      the corresponding Java class

    • matches

      public boolean matches(Item item, XPathContext context)
      Test whether a given item conforms to this type
      Specified by:
      matches in interface ItemType
      Parameters:
      item - The item to be tested
      context - the XPath dynamic evaluation context
      Returns:
      true if the item is an instance of this type; false otherwise

    • matchesItem

      public boolean matchesItem(Item item, boolean allowURIPromotion, Configuration config)
      Test whether a given item conforms to this type
      Specified by:
      matchesItem in interface ItemType
      Parameters:
      item - The item to be tested
      allowURIPromotion -
      config -
      Returns:
      true if the item is an instance of this type; false otherwise

    • validateContent

      public ValidationFailure validateContent(CharSequence value, NamespaceResolver nsResolver, ConversionRules rules)
      Check whether a given input string is valid according to this SimpleType
      Specified by:
      validateContent in interface SimpleType
      Parameters:
      value - the input string to be checked
      nsResolver - a namespace resolver used to resolve namespace prefixes if the type is namespace sensitive. The value supplied may be null; in this case any namespace-sensitive content will throw an UnsupportedOperationException.
      rules -
      Returns:
      null if validation succeeds; return a ValidationException describing the validation failure if validation fails, unless throwException is true, in which case the exception is thrown rather than being returned.
      Throws:
      UnsupportedOperationException - if the type is namespace-sensitive and no namespace resolver is supplied

    • getSuperType

      public ItemType getSuperType(TypeHierarchy th)
      Description copied from interface: ItemType
      Get the type from which this item type is derived by restriction. This is the supertype in the XPath type heirarchy, as distinct from the Schema base type: this means that the supertype of xs:boolean is xs:anyAtomicType, whose supertype is item() (rather than xs:anySimpleType).

      In fact the concept of "supertype" is not really well-defined, because the types form a lattice rather than a hierarchy. The only real requirement on this function is that it returns a type that strictly subsumes this type, ideally as narrowly as possible.

      Specified by:
      getSuperType in interface ItemType
      Parameters:
      th - the type hierarchy cache
      Returns:
      the supertype, or null if this type is item()

    • getFingerprint

      public int getFingerprint()
      Description copied from interface: SchemaType
      Get the fingerprint of the name of this type
      Specified by:
      getFingerprint in interface SchemaType
      Returns:
      the fingerprint. Returns an invented fingerprint for an anonymous type.

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • getDisplayName

      public String getDisplayName()
      Description copied from interface: SchemaType
      Get the display name of the type: that is, a lexical QName with an arbitrary prefix
      Specified by:
      getDisplayName in interface SchemaType
      Returns:
      a lexical QName identifying the type

    • hashCode

      public int hashCode()
      Returns a hash code value for the object.
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object obj)
      Test whether two ExternalObjectType objects represent the same type
      Overrides:
      equals in class Object
      Parameters:
      obj - the other ExternalObjectType
      Returns:
      true if the two objects represent the same type

    • preprocess

      public CharSequence preprocess(CharSequence input)
      Apply any pre-lexical facets, other than whitespace. At the moment the only such facet is saxon:preprocess
      Specified by:
      preprocess in interface SimpleType
      Parameters:
      input - the value to be preprocessed
      Returns:
      the value after preprocessing

    • postprocess

      public CharSequence postprocess(CharSequence input) throws ValidationException
      Reverse any pre-lexical facets, other than whitespace. At the moment the only such facet is saxon:preprocess. This is called when converting a value of this type to a string
      Specified by:
      postprocess in interface SimpleType
      Parameters:
      input - the value to be postprocessed: this is the "ordinary" result of converting the value to a string
      Returns:
      the value after postprocessing
      Throws:
      ValidationException - if postprocessing detects that the value is invalid

    • visitNamedSchemaComponents

      public void visitNamedSchemaComponents(SchemaComponentVisitor visitor) throws XPathException
      Visit all the schema components used in this ItemType definition
      Specified by:
      visitNamedSchemaComponents in interface ItemType
      Parameters:
      visitor - the visitor class to be called when each component is visited
      Throws:
      XPathException - if an error occurs

    • getPlainMemberTypes

      public Set<PlainType> getPlainMemberTypes()
      Get the set of atomic types that are subsumed by this type
      Specified by:
      getPlainMemberTypes in interface PlainType
      Returns:
      for an atomic type, the type itself; for a union type, the set of atomic types in its transitive membership

    • getDefaultPriority

      public double getDefaultPriority()
      Description copied from interface: ItemType
      Determine the default priority of this item type when used on its own as a Pattern
      Specified by:
      getDefaultPriority in interface ItemType
      Returns:
      the default priority