Package net.sf.saxon.type

## Interface SchemaType

- All Superinterfaces:
    `SchemaComponent`
  All Known Subinterfaces:
    `AtomicType`, `ComplexType`, `ListType`, `SimpleType`
  All Known Implementing Classes:
    `AnySimpleType`, `AnyType`, `BuiltInAtomicType`, `BuiltInListType`, `ErrorType`, `NumericType`, `SimpleTypeDefinition`, `Untyped`, `UserAtomicType`, `UserComplexType`, `UserDefinedType`, `UserListType`, `UserSimpleType`, `UserUnionType`

      public interface SchemaType
      extends SchemaComponent

  SchemaType is an interface implemented by all schema types: simple and complex types, built-in and user-defined types.

  There is a hierarchy of interfaces that extend SchemaType, representing the top levels of the schema type system: SimpleType and ComplexType, with SimpleType further subdivided into List, Union, and Atomic types.

  The implementations of these interfaces are organized into a different hierarchy: on the one side, built-in types such as AnyType, AnySimpleType, and the built-in atomic types and list types; on the other side, user-defined types defined in a schema.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface net.sf.saxon.type.SchemaComponent

      `SchemaComponent.ValidationStatus`

  - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static int` | `DERIVATION_EXTENSION` | If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the derivation by extension.
    `static int` | `DERIVATION_LIST` | If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the list.
    `static int` | `DERIVATION_RESTRICTION` | If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the derivation by restriction if complex types are involved, or a restriction if simple types are involved.
    `static int` | `DERIVATION_UNION` | If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the union if simple types are involved.
    `static int` | `DERIVE_BY_SUBSTITUTION` | Derivation by substitution.

    - ### Fields inherited from interface net.sf.saxon.type.SchemaComponent

      `COMPONENT_FUNCTION_TYPE`

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Default Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `allowsDerivation​(int derivation)` | Determines whether derivation (of a particular kind) from this type is allowed, based on the "final" property
    `void` | `analyzeContentExpression​(Expression expression, int kind)` | Analyze an XPath expression to see whether the expression is capable of delivering a value of this type.
    `AtomicSequence` | `atomize​(NodeInfo node)` | Get the typed value of a node that is annotated with this schema type.
    `void` | `checkTypeDerivationIsOK​(SchemaType base, int block)` | Check that this type is validly derived from a given type, following the rules for the Schema Component Constraint "Is Type Derivation OK (Simple)" (3.14.6) or "Is Type Derivation OK (Complex)" (3.4.6) as appropriate.
    `SchemaType` | `getBaseType()` | Returns the base type that this type inherits from.
    `int` | `getBlock()` | Returns the value of the 'block' attribute for this type, as a bit-significant integer with fields such as `DERIVATION_LIST` and `DERIVATION_EXTENSION`.
    `int` | `getDerivationMethod()` | Gets the integer code of the derivation method used to derive this type from its parent.
    `java.lang.String` | `getDescription()` | Get a description of this type for use in error messages.
    `java.lang.String` | `getDisplayName()` | Get the display name of the type: that is, a lexical QName with an arbitrary prefix
    `java.lang.String` | `getEQName()` | Get the name of this type as an EQName, that is, a string in the format Q{uri}local.
    `int` | `getFinalProhibitions()` | Get the types of derivation that are not permitted, by virtue of the "final" property.
    `int` | `getFingerprint()` | Get the fingerprint of the name of this type
    `java.lang.String` | `getName()` | Get the local name of this type
    `default SchemaType` | `getNearestNamedType()` | Get the nearest named type in the type hierarchy, that is, the nearest type that is not anonymous.
    `StructuredQName` | `getStructuredQName()` | Get the name of the type as a StructuredQName
    `java.lang.String` | `getSystemId()` | Get the URI of the schema document where the type was originally defined.
    `java.lang.String` | `getTargetNamespace()` | Get the target namespace of this type
    `boolean` | `isAnonymousType()` | Test whether this is an anonymous type
    `boolean` | `isAtomicType()` | Test whether this SchemaType is an atomic type
    `boolean` | `isComplexType()` | Test whether this SchemaType is a complex type
    `boolean` | `isIdRefType()` | Ask whether this type is an IDREF or IDREFS type.
    `boolean` | `isIdType()` | Ask whether this type is an ID type.
    `boolean` | `isSameType​(SchemaType other)` | Test whether this is the same type as another type.
    `boolean` | `isSimpleType()` | Test whether this SchemaType is a simple type

    - ### Methods inherited from interface net.sf.saxon.type.SchemaComponent

      `getComponentAsFunction, getRedefinitionLevel, getValidationStatus`

- - ### Field Detail

    - #### DERIVATION_RESTRICTION

          static final int DERIVATION_RESTRICTION

      If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the derivation by restriction if complex types are involved, or a restriction if simple types are involved.
      The reference type definition is derived by restriction from the other type definition if the other type definition is the same as the reference type definition, or if the other type definition can be reached recursively following the {base type definition} property from the reference type definition, and all the derivation methods involved are restriction.
      See Also:
        Constant Field Values

    - #### DERIVATION_EXTENSION

          static final int DERIVATION_EXTENSION

      If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the derivation by extension.
      The reference type definition is derived by extension from the other type definition if the other type definition can be reached recursively following the {base type definition} property from the reference type definition, and at least one of the derivation methods involved is an extension.
      See Also:
        Constant Field Values

    - #### DERIVATION_UNION

          static final int DERIVATION_UNION

      If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the union if simple types are involved.
      The reference type definition is derived by union from the other type definition if there exists two type definitions T1 and T2 such as the reference type definition is derived from T1 by `DERIVATION_RESTRICTION` or `DERIVATION_EXTENSION`, T2 is derived from the other type definition by `DERIVATION_RESTRICTION`, T1 has {variety} union, and one of the {member type definitions} is T2. Note that T1 could be the same as the reference type definition, and T2 could be the same as the other type definition.
      See Also:
        Constant Field Values

    - #### DERIVATION_LIST

          static final int DERIVATION_LIST

      If the document's schema is an XML Schema [XML Schema Part 1] , this constant represents the list.
      The reference type definition is derived by list from the other type definition if there exists two type definitions T1 and T2 such as the reference type definition is derived from T1 by `DERIVATION_RESTRICTION` or `DERIVATION_EXTENSION`, T2 is derived from the other type definition by `DERIVATION_RESTRICTION`, T1 has {variety} list, and T2 is the {item type definition}. Note that T1 could be the same as the reference type definition, and T2 could be the same as the other type definition.
      See Also:
        Constant Field Values

    - #### DERIVE_BY_SUBSTITUTION

          static final int DERIVE_BY_SUBSTITUTION

      Derivation by substitution. This constant, unlike the others, is NOT defined in the DOM level 3 TypeInfo interface.
      See Also:
        Constant Field Values

  - ### Method Detail

    - #### getName

          java.lang.String getName()

      Get the local name of this type
      Returns:
        the local name of this type definition, if it has one. Return null in the case of an anonymous type.

    - #### getTargetNamespace

          java.lang.String getTargetNamespace()

      Get the target namespace of this type
      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.

    - #### getFingerprint

          int getFingerprint()

      Get the fingerprint of the name of this type
      Returns:
        the fingerprint. Returns an invented fingerprint for an anonymous type.

    - #### getDisplayName

          java.lang.String getDisplayName()

      Get the display name of the type: that is, a lexical QName with an arbitrary prefix
      Returns:
        a lexical QName identifying the type. In the case of an anonymous type, an internally-generated name is returned

    - #### getStructuredQName

          StructuredQName getStructuredQName()

      Get the name of the type as a StructuredQName
      Returns:
        a StructuredQName identifying the type. In the case of an anonymous type, an internally-generated name is returned

    - #### getEQName

          java.lang.String getEQName()

      Get the name of this type as an EQName, that is, a string in the format Q{uri}local.
      Returns:
        an EQName identifying the type. In the case of an anonymous type, an internally-generated name is returned

    - #### isComplexType

          boolean isComplexType()

      Test whether this SchemaType is a complex type
      Returns:
        true if this SchemaType is a complex type

    - #### isSimpleType

          boolean isSimpleType()

      Test whether this SchemaType is a simple type
      Returns:
        true if this SchemaType is a simple type

    - #### isAtomicType

          boolean isAtomicType()

      Test whether this SchemaType is an atomic type
      Returns:
        true if this SchemaType is an atomic type

    - #### isAnonymousType

          boolean isAnonymousType()

      Test whether this is an anonymous type
      Returns:
        true if this SchemaType is an anonymous type

    - #### getBlock

          int getBlock()

      Returns the value of the 'block' attribute for this type, as a bit-significant integer with fields such as `DERIVATION_LIST` and `DERIVATION_EXTENSION`. This corresponds to the property "prohibited substitutions" in the schema component model.
      Returns:
        the value of the 'block' attribute for this type

    - #### getBaseType

          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.
      Returns:
        the base type, or null if this is xs:anyType (the root of the type hierarchy)

    - #### getNearestNamedType

          default SchemaType getNearestNamedType()

      Get the nearest named type in the type hierarchy, that is, the nearest type that is not anonymous. (In practice, since types cannot be derived from anonymous types, this will either the type itself, or its immediate base type).
      Returns:
        the nearest type, found by following the `getBaseType()` relation recursively, that is not an anonymous type

    - #### getDerivationMethod

          int getDerivationMethod()

      Gets the integer code of the derivation method used to derive this type from its parent. Returns zero for primitive types.
      Returns:
        a numeric code representing the derivation method, for example `DERIVATION_RESTRICTION`

    - #### getFinalProhibitions

          int getFinalProhibitions()

      Get the types of derivation that are not permitted, by virtue of the "final" property.
      Returns:
        the types of derivation that are not permitted, as a bit-significant integer containing bits such as `DERIVATION_EXTENSION`

    - #### allowsDerivation

          boolean allowsDerivation​(int derivation)

      Determines whether derivation (of a particular kind) from this type is allowed, based on the "final" property
      Parameters:
        `derivation` - the kind of derivation, for example `DERIVATION_LIST`
      Returns:
        true if this kind of derivation is allowed

    - #### analyzeContentExpression

          void analyzeContentExpression​(Expression expression,
                                        int kind)
                                 throws XPathException

      Analyze an XPath expression to see whether the expression is capable of delivering a value of this type. This method is called during static analysis of a query or stylesheet to give compile-time warnings when "impossible" paths are used.
      Parameters:
        `expression` - the expression that delivers the content
        `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

    - #### atomize

          AtomicSequence atomize​(NodeInfo node)
                          throws XPathException

      Get the typed value of a node that is annotated with this schema type.
      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. Changed in 9.5 to return the new type AtomicSequence

    - #### isSameType

          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)
      Parameters:
        `other` - the other type
      Returns:
        true if this is the same type as other

    - #### getDescription

          java.lang.String getDescription()

      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.
      Returns:
        text identifing the type, for use in a phrase such as "the type XXXX".

    - #### checkTypeDerivationIsOK

          void checkTypeDerivationIsOK​(SchemaType base,
                                       int block)
                                throws SchemaException

      Check that this type is validly derived from a given type, following the rules for the Schema Component Constraint "Is Type Derivation OK (Simple)" (3.14.6) or "Is Type Derivation OK (Complex)" (3.4.6) as appropriate.
      Parameters:
        `base` - the base type; the algorithm tests whether derivation from this type is permitted
        `block` - the derivations that are blocked by the relevant element declaration
      Throws:
        `SchemaException` - if the derivation is not allowed

    - #### getSystemId

          java.lang.String getSystemId()

      Get the URI of the schema document where the type was originally defined.
      Returns:
        the URI of the schema document. Returns null if the information is unknown or if this is a built-in type

    - #### isIdType

          boolean isIdType()
                    throws MissingComponentException

      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 in XSD 1.0, its typed value must be a *single* atomic value of type ID; the type of the node, however, can still allow a list. But in XSD 1.1, a list of IDs is permitted
      Returns:
        true if this type is an ID type
      Throws:
        `MissingComponentException`

    - #### isIdRefType

          boolean isIdRefType()
                       throws MissingComponentException

      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
      Returns:
        true if this type is an IDREF type
      Throws:
        `MissingComponentException`