Package javax.xml.xquery

Interface XQItemType

  • All Superinterfaces:
    XQSequenceType
    All Known Implementing Classes:
    SaxonXQItemType
    public interface XQItemType
extends XQSequenceType
    The XQItemType interface represents an item type as defined in XQuery 1.0: An XML Query language.


    The XQItemType extends the XQSequenceType but restricts the occurrance indicator to be exactly one. This derivation allows passing an item type wherever a sequence type is expected, but not the other way.

    The XQItemType interface contains methods to represent information about the following aspects of an item type:

    • The kind of the item - one of XQITEMKIND_* constants
    • The base type of the item - one of the XQBASETYPE_* constants. For atomic types this is the closest matching built-in XML Schema type, for element and attributes the closest matching built-in XML Schema type this node is based on.
    • Name of the node, if any
    • Type name, if any. If present, then also whether the typename is an anonymous type
    • XML Schema URI associated with the type, if any
    • The nillability characteristics, if any

    An instance of the XQItemType is a standalone object that is independant of the XQConnection and any XQuery static or dynamic context.

    • Field Detail

      • XQITEMKIND_ATOMIC

        static final int XQITEMKIND_ATOMIC
        Some atomic type.
        See Also:
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      • XQITEMKIND_ATTRIBUTE

        static final int XQITEMKIND_ATTRIBUTE
        Attribute node
        See Also:
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      • XQITEMKIND_DOCUMENT

        static final int XQITEMKIND_DOCUMENT
        Document type (the type information represents the type of the document element)
        See Also:
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      • XQITEMKIND_DOCUMENT_ELEMENT

        static final int XQITEMKIND_DOCUMENT_ELEMENT
        Document node containing a single element node as its child (type information represents type of the element child)
        See Also:
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      • XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT

        static final int XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT
        Document node containing a single schema element node as its child (type information represents type of the schema element child)
        See Also:
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      • XQITEMKIND_PI

        static final int XQITEMKIND_PI
        Processing instruction node
        See Also:
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      • XQITEMKIND_SCHEMA_ELEMENT

        static final int XQITEMKIND_SCHEMA_ELEMENT
        Schema element node
        See Also:
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      • XQITEMKIND_SCHEMA_ATTRIBUTE

        static final int XQITEMKIND_SCHEMA_ATTRIBUTE
        Schema attribute node
        See Also:
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      • XQBASETYPE_UNTYPED

        static final int XQBASETYPE_UNTYPED
        Represents the schema type xs:untyped
        See Also:
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      • XQBASETYPE_ANYTYPE

        static final int XQBASETYPE_ANYTYPE
        Represents the schema type xs:anyType
        See Also:
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      • XQBASETYPE_ANYSIMPLETYPE

        static final int XQBASETYPE_ANYSIMPLETYPE
        Represents the schema type xs:anySimpleType
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      • XQBASETYPE_ANYATOMICTYPE

        static final int XQBASETYPE_ANYATOMICTYPE
        Represents the schema type xs:anyAtomicType
        See Also:
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      • XQBASETYPE_UNTYPEDATOMIC

        static final int XQBASETYPE_UNTYPEDATOMIC
        Represents the schema type xs:untypedAtomic
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      • XQBASETYPE_DAYTIMEDURATION

        static final int XQBASETYPE_DAYTIMEDURATION
        Represents the schema type xs:dayTimeDuration
        See Also:
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      • XQBASETYPE_YEARMONTHDURATION

        static final int XQBASETYPE_YEARMONTHDURATION
        Represents the schema type xs:yearMonthDuration
        See Also:
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      • XQBASETYPE_ANYURI

        static final int XQBASETYPE_ANYURI
        Represents the schema type xs:anyURI
        See Also:
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      • XQBASETYPE_BASE64BINARY

        static final int XQBASETYPE_BASE64BINARY
        Represents the schema type xs:base64Binary
        See Also:
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      • XQBASETYPE_BOOLEAN

        static final int XQBASETYPE_BOOLEAN
        Represents the schema type xs:boolean
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      • XQBASETYPE_DATE

        static final int XQBASETYPE_DATE
        Represents the schema type xs:date
        See Also:
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      • XQBASETYPE_INT

        static final int XQBASETYPE_INT
        Represents the schema type xs:int
        See Also:
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      • XQBASETYPE_INTEGER

        static final int XQBASETYPE_INTEGER
        Represents the schema type xs:integer
        See Also:
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      • XQBASETYPE_SHORT

        static final int XQBASETYPE_SHORT
        Represents the schema type xs:short
        See Also:
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      • XQBASETYPE_LONG

        static final int XQBASETYPE_LONG
        Represents the schema type xs:long
        See Also:
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      • XQBASETYPE_DATETIME

        static final int XQBASETYPE_DATETIME
        Represents the schema type xs:dateTime
        See Also:
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      • XQBASETYPE_DECIMAL

        static final int XQBASETYPE_DECIMAL
        Represents the schema type xs:decimal
        See Also:
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      • XQBASETYPE_DOUBLE

        static final int XQBASETYPE_DOUBLE
        Represents the schema type xs:double
        See Also:
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      • XQBASETYPE_DURATION

        static final int XQBASETYPE_DURATION
        Represents the schema type xs:duration
        See Also:
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      • XQBASETYPE_FLOAT

        static final int XQBASETYPE_FLOAT
        Represents the schema type xs:float
        See Also:
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      • XQBASETYPE_GDAY

        static final int XQBASETYPE_GDAY
        Represents the schema type xs:gDay
        See Also:
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      • XQBASETYPE_GMONTH

        static final int XQBASETYPE_GMONTH
        Represents the schema type xs:gMonth
        See Also:
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      • XQBASETYPE_GMONTHDAY

        static final int XQBASETYPE_GMONTHDAY
        Represents the schema type xs:gMonthDay
        See Also:
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      • XQBASETYPE_GYEAR

        static final int XQBASETYPE_GYEAR
        Represents the schema type xs:gYear
        See Also:
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      • XQBASETYPE_GYEARMONTH

        static final int XQBASETYPE_GYEARMONTH
        Represents the schema type xs:gYearMonth
        See Also:
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      • XQBASETYPE_HEXBINARY

        static final int XQBASETYPE_HEXBINARY
        Represents the schema type xs:hexBinary
        See Also:
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      • XQBASETYPE_NOTATION

        static final int XQBASETYPE_NOTATION
        Represents the schema type xs:NOTATION
        See Also:
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      • XQBASETYPE_QNAME

        static final int XQBASETYPE_QNAME
        Represents the schema type xs:QName
        See Also:
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      • XQBASETYPE_STRING

        static final int XQBASETYPE_STRING
        Represents the schema type xs:string
        See Also:
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      • XQBASETYPE_TIME

        static final int XQBASETYPE_TIME
        Represents the schema type xs:time
        See Also:
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      • XQBASETYPE_BYTE

        static final int XQBASETYPE_BYTE
        Represents the schema type xs:byte
        See Also:
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      • XQBASETYPE_NONPOSITIVE_INTEGER

        static final int XQBASETYPE_NONPOSITIVE_INTEGER
        Represents the schema type xs:nonPositiveInteger
        See Also:
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      • XQBASETYPE_NONNEGATIVE_INTEGER

        static final int XQBASETYPE_NONNEGATIVE_INTEGER
        Represents the schema type xs:nonNegativeInteger
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      • XQBASETYPE_NEGATIVE_INTEGER

        static final int XQBASETYPE_NEGATIVE_INTEGER
        Represents the schema type xs:negativeInteger
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      • XQBASETYPE_POSITIVE_INTEGER

        static final int XQBASETYPE_POSITIVE_INTEGER
        Represents the schema type xs:positiveInteger
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      • XQBASETYPE_UNSIGNED_LONG

        static final int XQBASETYPE_UNSIGNED_LONG
        Represents the schema type xs:unsignedLong
        See Also:
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      • XQBASETYPE_UNSIGNED_INT

        static final int XQBASETYPE_UNSIGNED_INT
        Represents the schema type xs:unsignedInt
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      • XQBASETYPE_UNSIGNED_SHORT

        static final int XQBASETYPE_UNSIGNED_SHORT
        Represents the schema type xs:unsignedShort
        See Also:
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      • XQBASETYPE_UNSIGNED_BYTE

        static final int XQBASETYPE_UNSIGNED_BYTE
        Represents the schema type xs:unsignedByte
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      • XQBASETYPE_NORMALIZED_STRING

        static final int XQBASETYPE_NORMALIZED_STRING
        Represents the schema type xs:normalizedString
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      • XQBASETYPE_TOKEN

        static final int XQBASETYPE_TOKEN
        Represents the schema type xs:token
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      • XQBASETYPE_LANGUAGE

        static final int XQBASETYPE_LANGUAGE
        Represents the schema type xs:language
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      • XQBASETYPE_NAME

        static final int XQBASETYPE_NAME
        Represents the schema type xs:Name
        See Also:
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      • XQBASETYPE_NCNAME

        static final int XQBASETYPE_NCNAME
        Represents the schema type xs:NCName
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      • XQBASETYPE_NMTOKEN

        static final int XQBASETYPE_NMTOKEN
        Represents the schema type xs:NMToken
        See Also:
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      • XQBASETYPE_ID

        static final int XQBASETYPE_ID
        Represents the schema type xs:ID
        See Also:
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      • XQBASETYPE_IDREF

        static final int XQBASETYPE_IDREF
        Represents the schema type xs:IDREF
        See Also:
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      • XQBASETYPE_ENTITY

        static final int XQBASETYPE_ENTITY
        Represents the schema type xs:ENTITY
        See Also:
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      • XQBASETYPE_IDREFS

        static final int XQBASETYPE_IDREFS
        Represents the schema type xs:IDREFS. Valid only if the item kind is XQITEMKIND_ELEMENT, XQITEMKIND_DOCUMENT_ELEMENT, or XQITEMKIND_ATTRIBUTE
        See Also:
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      • XQBASETYPE_ENTITIES

        static final int XQBASETYPE_ENTITIES
        Represents the schema type xs:ENTITIES
        See Also:
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      • XQBASETYPE_NMTOKENS

        static final int XQBASETYPE_NMTOKENS
        Represents the schema type xs:NMTOKENS
        See Also:
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    • Method Detail

      • getBaseType

        int getBaseType()
         throws XQException
        Returns the base type of the item. One of the XQBASETYPE_* constants.

        XQJ defines a constant for each of the built-in schema types defined in XML Schema. For atomic types this is the closest matching built-in XML Schema type, for element and attributes the closest matching built-in XML Schema type this node is based on.
        Returns:
        int one of the XQBASETYPE_* constants indicating the basic type of the item
        Throws:
        XQException - if the item kind is not one of: XQITEMKIND_DOCUMENT_ELEMENT, XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT, XQITEMKIND_ELEMENT, XQITEMKIND_SCHEMA_ELEMENT, XQITEMKIND_ATTRIBUTE, XQITEMKIND_SCHEMA_ATTRIBUTE, or XQITEMKIND_ATOMIC

      • getItemKind

        int getItemKind()
        Returns the kind of the item. One of the XQITEMKIND_* constants.
        Returns:
        int one of the XQITEMKIND_* constants indicating the basic kind of the item

      • getItemOccurrence

        int getItemOccurrence()
        Returns the occurrence indicator for the item type. This method will always return the value XQSequenceType.OCC_EXACTLY_ONE.
        Specified by:
        getItemOccurrence in interface XQSequenceType
        Returns:
        int indicating the occurrence indicator

      • toString

        java.lang.String toString()
        Returns a human-readable implementation-defined string representation of the item type.
        Specified by:
        toString in interface XQSequenceType
        Overrides:
        toString in class java.lang.Object
        Returns:
        String a string representation of the item type

      • getNodeName

        javax.xml.namespace.QName getNodeName()
                               throws XQException
        Returns the name of the node in case the item kind is an XQITEMKIND_DOCUMENT_ELEMENT, XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT, XQITEMKIND_ELEMENT, XQITEMKIND_SCHEMA_ELEMENT, XQITEMKIND_ATTRIBUTE, or XQITEMKIND_SCHEMA_ATTRIBUTE.

        For example, in the case of a type for element "foo" this will return the QName foo. For wildcard entries a null value will be returned.

        Returns:
        QName for the name of the element, attribute, or document element node. null if it is a wildcard
        Throws:
        XQException - if the item kind is not one of: XQITEMKIND_DOCUMENT_ELEMENT, XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT, XQITEMKIND_ELEMENT, XQITEMKIND_SCHEMA_ELEMENT, XQITEMKIND_ATTRIBUTE, or XQITEMKIND_SCHEMA_ATTRIBUTE

      • getSchemaURI

        java.net.URI getSchemaURI()
        Returns the schema location URI of the schema that contains the item's element or type definition. This method is implementation-definied and an implementation will return a null value if it does not support retrieving the schema location URI.

        If the item corresponds to a validated global element in a schema, the result will be the schema location URI to the XMLSchema containing the element definition. Otherwise if the item is a schema validated node, the result will be the schema location URI of the XMLSchema containing the type definition of that node. If the item is not schema validated, the result is null

        Returns:
        URI representing the schema location URI of the XMLSchema containing the global element definition or the type definition of the current item. null in case the item is not schema validated or if the implementation does not support retrieving the schema URI.

      • getTypeName

        javax.xml.namespace.QName getTypeName()
                               throws XQException
        Represents a type name (global or local). This can be used to represent specific type name such as, element foo of type hatsize. The schema type name is represented as a single QName. If the return type is an anonymous type, the actual QName value returned is implementation defined.
        Returns:
        the QName of the schema type in case of a user defined or anonoymous types. For a built-in type, returns a predefined type name as QName (e.g.xs:anyType, xs:decimal, etc). Cannot be null
        Throws:
        XQException - if the item kind is not one of: XQITEMKIND_DOCUMENT_ELEMENT, XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT, XQITEMKIND_ATOMIC, XQITEMKIND_ELEMENT, XQITEMKIND_SCHEMA_ELEMENT, XQITEMKIND_ATTRIBUTE, or XQITEMKIND_SCHEMA_ATTRIBUTE

      • isAnonymousType

        boolean isAnonymousType()
        Represents whether the item type is an anonymous type in the schema.
        Returns:
        true if the item type is an anonymous type in the schema, false otherwise

      • isElementNillable

        boolean isElementNillable()
        Returns whether the element type is nillable or not.
        Returns:
        true if the element type is nillable, false otherwise

      • getPIName

        java.lang.String getPIName()
                    throws XQException
        Returns the name of the processing instruction type. As such the item kind of this XQItemType must be XQITEMKIND_PI.
        Returns:
        the name of the processing instruction type. null if it is a wildcard
        Throws:
        XQException - if the item kind is not XQITEMKIND_PI

      • equals

        boolean equals​(java.lang.Object o)
        Compares the specified object with this item type for equality. The result is true only if the argument is an item type object which represents the same XQuery item type.



        In order to comply with the general contract of equals and hashCode across different implementations the following algorithm must be used. Return true if and only if both objects are XQItemType and:

        • getItemKind() is equal
        • if getBaseType() is supported for the item kind, it must be equal
        • if getNodeName() is supported for the item kind, it must be equal
        • getSchemaURI() is equal
        • if getTypeName() is supported for the item kind, it must be equal
        • isAnonymousType() is equal
        • isElementNillable() is equal
        • if getPIName() is supported for the item kind, it must be equal
        Specified by:
        equals in interface XQSequenceType
        Overrides:
        equals in class java.lang.Object
        Parameters:
        o - an XQItemType object representing an XQuery item type
        Returns:
        true if the input item type object represents the same XQuery item type, false otherwise

      • hashCode

        int hashCode()
        Returns a hash code consistent with the definition of the equals method.



        In order to comply with the general contract of equals and hashCode across different implementations the following algorithm must be used: 

          hashCode = this.getItemKind();
  if this.getSchemaURI != null
    hashCode = 31*hashCode + this.getSchemaURI().hashCode();
  if this.getBaseType() is supported for the item kind
    hashCode = 31*hashCode + this.getbaseType();
  if this.getNodeName () is supported for the item kind and
    this.getNodeName() != null
    hashCode = 31*hashCode + this.getNodeName().hashCode()
  if this.getTypeName () is supported for the item kind
    hashCode = 31*hashCode + this.getTypeName().hashCode();
  if this.getPIName () is supported for the item kind and
    this.getPIName () != null
    hashCode = 31*hashCode + this.getPIName().hashCode();
        Specified by:
        hashCode in interface XQSequenceType
        Overrides:
        hashCode in class java.lang.Object
        Returns:
        hash code for this item type