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javax.xml.xquery
Interface XQDataFactory

All Known Subinterfaces:
XQConnection
All Known Implementing Classes:
SaxonXQConnection, SaxonXQDataFactory
public interface XQDataFactory

This interface represents a factory to obtain sequences, item objects and types.

The items, sequences and types obtained through this interface are independent of any connection.

The items and sequences created are immutable. The close method can be called to close the item or sequence and release all resources associated with this item or sequence.

Method Summary
 XQItemType createAtomicType(int basetype)
          Creates a new XQItemType object representing an XQuery atomic type.
 XQItemType createAtomicType(int basetype, QName typename, URI schemaURI)
          Creates a new XQItemType object representing an XQuery atomic type.
 XQItemType createAttributeType(QName nodename, int basetype)
          Creates a new XQItemType object representing the XQuery attribute(nodename, basetype) type with the given node name and base type.
 XQItemType createAttributeType(QName nodename, int basetype, QName typename, URI schemaURI)
          Creates a new XQItemType object representing the XQuery attribute(nodename,basetype,typename,schemaURI) type, with the given node name, base type, schema type name and schema URI.
 XQItemType createCommentType()
          Creates a new XQItemType object representing the XQuery comment() type.
 XQItemType createDocumentElementType(XQItemType elementType)
          Creates a new XQItemType object representing the XQuery document-node(elementType) type containing a single element.
 XQItemType createDocumentSchemaElementType(XQItemType elementType)
          Creates a new XQItemType object representing the XQuery document-node(elementType) type containing a single schema-element(...).
 XQItemType createDocumentType()
          Creates a new XQItemType object representing the XQuery document-node() type.
 XQItemType createElementType(QName nodename, int basetype)
          Creates a new XQItemType object representing the XQuery element(nodename, basetype) type, with the given node name and base type.
 XQItemType createElementType(QName nodename, int basetype, QName typename, URI schemaURI, boolean allowNill)
          Creates a new XQItemType object representing the XQuery element(nodename,basetype,typename,schemaURI, allowNill) type, given the node name, base type, schema type name, schema URI, and nilled check.
 XQItem createItem(XQItem item)
          Creates a copy of the specified XQItem.
 XQItem createItemFromAtomicValue(String value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromBoolean(boolean value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromByte(byte value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromDocument(InputStream value, String baseURI, XQItemType type)
          Creates an item from the given value.
 XQItem createItemFromDocument(Reader value, String baseURI, XQItemType type)
          Creates an item from the given value.
 XQItem createItemFromDocument(Source value, XQItemType type)
          Creates an item from the given Source.
 XQItem createItemFromDocument(String value, String baseURI, XQItemType type)
          Creates an item from the given value.
 XQItem createItemFromDocument(XMLStreamReader value, XQItemType type)
          Creates an item from the given value.
 XQItem createItemFromDouble(double value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromFloat(float value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromInt(int value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromLong(long value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromNode(Node value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromObject(Object value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromShort(short value, XQItemType type)
          Creates an item from a given value.
 XQItem createItemFromString(String value, XQItemType type)
          Creates an item from a given value.
 XQItemType createItemType()
          Creates a new XQItemType object representing the XQuery item type.
 XQItemType createNodeType()
          Creates a new XQItemType object representing the XQuery node() type.
 XQItemType createProcessingInstructionType(String piTarget)
          Creates a new XQItemType object representing the XQuery processing-instruction(piTarget) type.
 XQItemType createSchemaAttributeType(QName nodename, int basetype, URI schemaURI)
          Creates a new XQItemType object representing the XQuery schema-attribute(nodename,basetype,schemaURI) type, with the given node name, base type, and schema URI.
 XQItemType createSchemaElementType(QName nodename, int basetype, URI schemaURI)
          Creates a new XQItemType object representing the XQuery schema-element(nodename,basetype,schemaURI) type, given the node name, base type, and the schema URI.
 XQSequence createSequence(Iterator i)
          Creates an XQSequence, containing all the items from the iterator.
 XQSequence createSequence(XQSequence s)
          Creates a copy of the specified XQSequence.
 XQSequenceType createSequenceType(XQItemType item, int occurence)
          Creates a new sequence type from an item type and occurence indicator.
 XQItemType createTextType()
          Creates a new XQItemType object representing the XQuery text() type.
 

Method Detail

createItemFromAtomicValue

XQItem createItemFromAtomicValue(String value,
                                 XQItemType type)
                                 throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the casting from xs:string rules outlined in 17.1.1 Casting from xs:string and xs:untypedAtomic, XQuery 1.0 and XPath 2.0 Functions and Operators. If the cast fails an XQException is thrown.

Parameters:
value - the lexical string value of the type
type - the item type
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) any of the arguments are null, (2) given type is not an atomic type, (3) the conversion of the value to an XDM instance failed, or (4) the underlying object implementing the interface is closed

createItemFromString

XQItem createItemFromString(String value,
                            XQItemType type)
                            throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type, which must represent an xs:string or a type derived by restriction from xs:string. If the specified type is null, it defaults to xs:string.
Subsequently the value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the conversion fails, an XQException will be thrown.

Parameters:
value - the value to be converted, cannot be null
type - the type of the value to be bound to the external variable. The default type, xs:string, is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromDocument

XQItem createItemFromDocument(String value,
                              String baseURI,
                              XQItemType type)
                              throws XQException
Creates an item from the given value.

If the value represents a well-formed XML document, it will be parsed and results in a document node. The kind of the input type must be null, XQITEMKIND_DOCUMENT_ELEMENT, or XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT.

The value is converted into an instance of the specified type according to the rules defined in 14.3 Mapping a Java XML document to an XQuery document node, XQuery API for Java (XQJ) 1.0.

If the value is not well formed, or if a kind of the input type other than the values list above is specified, behavior is implementation defined and may raise an exception.

Parameters:
value - the value to be converted, cannot be null
baseURI - an optional base URI, can be null. It can be used, for example, to resolve relative URIs and to include in error messages.
type - the type of the value for the created document node. If null is specified, it behaves as if XQDataFactory.createDocumentElementType( XQDataFactory.createElementType(null, XQItemType.XQBASETYPE_XS_UNTYPED)) were passed in as the type parameter. That is, the type represents the XQuery sequence type document-node(element(*, xs:untyped))
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromDocument

XQItem createItemFromDocument(Reader value,
                              String baseURI,
                              XQItemType type)
                              throws XQException
Creates an item from the given value.

If the value represents a well-formed XML document, it will be parsed and results in a document node. The kind of the input type must be null, XQITEMKIND_DOCUMENT_ELEMENT, or XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT.

The value is converted into an instance of the specified type according to the rules defined in 14.3 Mapping a Java XML document to an XQuery document node, XQuery API for Java (XQJ) 1.0.

If the value is not well formed, or if a kind of the input type other than the values list above is specified, behavior is implementation defined and may raise an exception.

Parameters:
value - the value to be converted, cannot be null
baseURI - an optional base URI, can be null. It can be used, for example, to resolve relative URIs and to include in error messages.
type - the type of the value for the created document node. If null is specified, it behaves as if XQDataFactory.createDocumentElementType( XQDataFactory.createElementType(null, XQItemType.XQBASETYPE_XS_UNTYPED)) were passed in as the type parameter. That is, the type represents the XQuery sequence type document-node(element(*, xs:untyped))
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromDocument

XQItem createItemFromDocument(InputStream value,
                              String baseURI,
                              XQItemType type)
                              throws XQException
Creates an item from the given value.

If the value represents a well-formed XML document, it will be parsed and results in a document node. The kind of the input type must be null, XQITEMKIND_DOCUMENT_ELEMENT, or XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT.

The value is converted into an instance of the specified type according to the rules defined in 14.3 Mapping a Java XML document to an XQuery document node, XQuery API for Java (XQJ) 1.0.

If the value is not well formed, or if a kind of the input type other than the values list above is specified, behavior is implementation defined and may raise an exception.

Parameters:
value - the value to be converted, cannot be null
baseURI - an optional base URI, can be null. It can be used, for example, to resolve relative URIs and to include in error messages.
type - the type of the value for the created document node. If null is specified, it behaves as if XQDataFactory.createDocumentElementType( XQDataFactory.createElementType(null, XQItemType.XQBASETYPE_XS_UNTYPED)) were passed in as the type parameter. That is, the type represents the XQuery sequence type document-node(element(*, xs:untyped))
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromDocument

XQItem createItemFromDocument(XMLStreamReader value,
                              XQItemType type)
                              throws XQException
Creates an item from the given value.

If the value represents a well-formed XML document, it results in a document node. The kind of the input type must be null, XQITEMKIND_DOCUMENT_ELEMENT or XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT.

The value is converted into an instance of the specified type according to the rules defined in 14.3 Mapping a Java XML document to an XQuery document node, XQuery API for Java (XQJ) 1.0.

If the value is not well formed, or if a kind of the input type other than the values list above is specified, behavior is implementation defined and may raise an exception.

Parameters:
value - the value to be converted, cannot be null
type - the type of the value for the created document node. If null is specified, it behaves as if XQDataFactory.createDocumentElementType( XQDataFactory.createElementType(null, XQItemType.XQBASETYPE_XS_UNTYPED)) were passed in as the type parameter. That is, the type represents the XQuery sequence type document-node(element(*, xs:untyped))
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromDocument

XQItem createItemFromDocument(Source value,
                              XQItemType type)
                              throws XQException
Creates an item from the given Source. An XQJ implementation must at least support the following implementations:

If the value represents a well-formed XML document, it will result in a document node. The kind of the input type must be null, XQITEMKIND_DOCUMENT_ELEMENT, or XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT.

The value is converted into an instance of the specified type according to the rules defined in 14.3 Mapping a Java XML document to an XQuery document node, XQuery API for Java (XQJ) 1.0.

If the value is not well formed, or if a kind of the input type other than the values list above is specified, behavior is implementation defined and may raise an exception.

Parameters:
value - the value to be converted, cannot be null
type - the type of the value for the created document node. If null is specified, it behaves as if XQDataFactory.createDocumentElementType( XQDataFactory.createElementType(null, XQItemType.XQBASETYPE_XS_UNTYPED)) were passed in as the type parameter. That is, the type represents the XQuery sequence type document-node(element(*, xs:untyped))
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromObject

XQItem createItemFromObject(Object value,
                            XQItemType type)
                            throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted, cannot be null
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromBoolean

XQItem createItemFromBoolean(boolean value,
                             XQItemType type)
                             throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - (1) the conversion of the value to an XDM instance failed, or (2) the underlying object implementing the interface is closed

createItemFromByte

XQItem createItemFromByte(byte value,
                          XQItemType type)
                          throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - (1) the conversion of the value to an XDM instance failed, or (2) the underlying object implementing the interface is closed

createItemFromDouble

XQItem createItemFromDouble(double value,
                            XQItemType type)
                            throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - (1) the conversion of the value to an XDM instance failed, or (2) the underlying object implementing the interface is closed

createItemFromFloat

XQItem createItemFromFloat(float value,
                           XQItemType type)
                           throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - (1) the conversion of the value to an XDM instance failed, or (2) the underlying object implementing the interface is closed

createItemFromInt

XQItem createItemFromInt(int value,
                         XQItemType type)
                         throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - (1) the conversion of the value to an XDM instance failed, or (2) the underlying object implementing the interface is closed

createItemFromLong

XQItem createItemFromLong(long value,
                          XQItemType type)
                          throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - (1) the conversion of the value to an XDM instance failed, or (2) the underlying object implementing the interface is closed

createItemFromNode

XQItem createItemFromNode(Node value,
                          XQItemType type)
                          throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted, cannot be null
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - if (1) the value argument is null, (2) the conversion of the value to an XDM instance failed, or (3) the underlying object implementing the interface is closed

createItemFromShort

XQItem createItemFromShort(short value,
                           XQItemType type)
                           throws XQException
Creates an item from a given value. The value is converted into an instance of the specified type according to the rule defined in 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the converstion fails, an XQException will be thrown.

Parameters:
value - the value to be converted
type - the type of the value to be bound to the external variable. The default type of the value is used in case null is specified
Returns:
XQItem representing the resulting item
Throws:
XQException - (1) the conversion of the value to an XDM instance failed, or (2) the underlying object implementing the interface is closed

createItem

XQItem createItem(XQItem item)
                  throws XQException
Creates a copy of the specified XQItem. This method can be used, for example, to copy an XQResultItem object so that the new item is not dependant on the connection.

Parameters:
item - the XQItem to copy
Returns:
XQItem independent of any underlying XQConnection is created
Throws:
XQException - if (1) the specified item is null, (2) the underlying object implementing the interface is closed, (3) the specified item is closed

createSequence

XQSequence createSequence(XQSequence s)
                          throws XQException
Creates a copy of the specified XQSequence. The newly created XQSequence is scrollable and independent of any underlying XQConnection. The new XQSequence will contain all items from the specified XQSequence starting from its current position. The copy process will implicitly perform next operations on the specified sequence to read the items. All items are consumed, the current position of the cursor is set to point after the last item.

Parameters:
s - input sequence
Returns:
XQSequence representing a copy of the input sequence
Throws:
XQException - if (1) there are errors accessing the items in the specified sequence, (2) the specified sequence is closed, (3) in the case of a forward only sequence, a get or write method has already been invoked on the current item, (4) the s parameter is null, or (5) the underlying object implementing the interface is closed

createSequence

XQSequence createSequence(Iterator i)
                          throws XQException
Creates an XQSequence, containing all the items from the iterator. The newly created XQSequence is scrollable and independent of any underlying XQConnection. If the iterator returns an XQItem, it is added to the sequence. If the iterator returns any other object, an item is added to the sequence following the rules from 14.2 Mapping a Java Data Type to an XQuery Data Type, XQuery API for Java (XQJ) 1.0. If the iterator does not return any items, then an empty sequence is created.

Parameters:
i - input iterator
Returns:
XQSequence representing the sequence containing all items from the input iterator
Throws:
XQException - if (1) the conversion of any of the objects in the iterator to item fails, (2) the i parameter is null, or (3) underlying object implementing the interface is closed

createAtomicType

XQItemType createAtomicType(int basetype)
                            throws XQException
Creates a new XQItemType object representing an XQuery atomic type. The item kind of the item type will be XQItemType.XQITEMKIND_ATOMIC.
Example - 
  XQConnection conn = ...;

  // to create xs:integer item type
  conn.createAtomicType(XQItemType.XQBASETYPE_INTEGER);

Parameters:
basetype - one of the XQItemType.XQBASETYPE_* constants. All basetype constants except the following are valid: 
 
  XQItemType.XQBASETYPE_UNTYPED
  XQItemType.XQBASETYPE_ANYTYPE
  XQItemType.XQBASETYPE_IDREFS
  XQItemType.XQBASETYPE_NMTOKENS
  XQItemType.XQBASETYPE_ENTITIES
  XQItemType.XQBASETYPE_ANYSIMPLETYPE
Returns:
a new XQItemType representing the atomic type
Throws:
XQException - if (1) an invalid basetype value is passed in, or (2) the underlying object implementing the interface is closed

createAtomicType

XQItemType createAtomicType(int basetype,
                            QName typename,
                            URI schemaURI)
                            throws XQException
Creates a new XQItemType object representing an XQuery atomic type. The item kind of the item type will be XQItemType.XQITEMKIND_ATOMIC.
Example - 

  XQConnection conn = ...;

  // to create po:hatsize atomic item type
  conn.createAtomicType(XQItemType.XQBASETYPE_INTEGER, 
                  new QName("http://www.hatsizes.com", "hatsize","po"), 
                  new URI("http://hatschema.com"));

Parameters:
basetype - one of the XQItemType.XQBASETYPE_* constants. All basetype constants except the following are valid: 
 
  XQItemType.XQBASETYPE_UNTYPED
  XQItemType.XQBASETYPE_ANYTYPE
  XQItemType.XQBASETYPE_IDREFS
  XQItemType.XQBASETYPE_NMTOKENS
  XQItemType.XQBASETYPE_ENTITIES
  XQItemType.XQBASETYPE_ANYSIMPLETYPE
typename - the QName of the type. If the QName refers to a predefinied type, it must match the basetype. Can be null
schemaURI - the URI to the schema. Can be null. This can only be specified if the typename is also specified
Returns:
a new XQItemType representing the atomic type
Throws:
XQException - if (1) an invalid basetype value is passed in, (2) the underlying object implementing the interface is closed, (3) the implementation does not support user-defined XML schema types, or (4) if the typename refers to a predefinied type and does not match basetype

createAttributeType

XQItemType createAttributeType(QName nodename,
                               int basetype)
                               throws XQException
Creates a new XQItemType object representing the XQuery attribute(nodename, basetype) type with the given node name and base type. This method can be used to create item type for attributes with a pre-defined schema type.

Example - 

  XQConnection conn = ..; // An XQuery connection

  - attribute() // no node name, pass null for the node name

    conn.createAttributeType(null, XQItemType.XQBASETYPE_ANYSIMPLETYPE);

  - attribute (*)  // equivalent to attribute()

    conn.createAttributeType(null, XQItemType.XQBASETYPE_ANYSIMPLETYPE);

  - attribute (person) // attribute of name person and any simple type.

    conn.createAttributeType(new QName("person"), XQItemType.XQBASETYPE_ANYSIMPLETYPE); 

  - attribute(foo:bar) // node name foo:bar, type is any simple type

    conn.createAttributeType(new QName("http://www.foo.com", "bar","foo"), 
                             XQItemType.XQBASETYPE_ANYSIMPLETYPE);

  - attribute(foo:bar, xs:integer) // node name foo:bar, type is xs:integer

    conn.createAttributeType(new QName("http://www.foo.com", "bar","foo"), 
                             XQItemType.XQBASETYPE_INTEGER);

Parameters:
nodename - specifies the name of the node.null indicates a wildcard for the node name
basetype - the base type of the attribute. One of the XQItemType.XQBASETYPE_* other than XQItemType.XQBASETYPE_UNTYPED or XQItemType.XQBASETYPE_ANYTYPE
Returns:
a new XQItemType representing the XQuery attribute(nodename, basetype) type
Throws:
XQException - if (1) the underlying object implementing the interface is closed or (2) if the base type is one of: XQItemType.XQBASETYPE_UNTYPED or XQItemType.XQBASETYPE_ANYTYPE

createAttributeType

XQItemType createAttributeType(QName nodename,
                               int basetype,
                               QName typename,
                               URI schemaURI)
                               throws XQException
Creates a new XQItemType object representing the XQuery attribute(nodename,basetype,typename,schemaURI) type, with the given node name, base type, schema type name and schema URI. The type name can reference either pre-defined simple types or user-defined simple types.

Example - 

  XQConnection conn = ..; // An XQuery connection

  - attribute (name, employeename) // attribute name of type employeename 
 
  conn.createAttributeType(new QName("name"), XQItemType.XQBASETYPE_ANYSIMPLETYPE,
                           new QName("employeename"), null);
 
  - attribute (foo:bar, po:city) 
  where the prefix foo refers to the namespace http://www.foo.com and the
  prefix po refers to the namespace "http://www.address.com"

  conn.createAttributeType(new QName("http://www.foo.com", "bar","foo"), 
                           XQItemType.XQBASETYPE_ANYSIMPLETYPE,
                           new QName("http://address.com", "address","po"), null);

  - attribute (zip, zipcode) // attribute zip of type zipchode which derives from
                             // xs:string 

  conn.createAttributeType(new QName("zip"), XQItemType.XQBASETYPE_STRING,
                           new QName("zipcode"), null);

  - attribute(foo:bar, po:hatsize) 
  where the prefix foo refers to the namespace http://www.foo.com and the
  prefix po refers to the namespace "http://www.hatsizes.com" 
  with schema URI "http://hatschema.com"

  conn.createAttributeType(new QName("http://www.foo.com", "bar","foo"), 
                  XQItemType.XQBASETYPE_INTEGER,
                  new QName("http://www.hatsizes.com", "hatsize","po"), 
                  new QName("http://hatschema.com"));

Parameters:
nodename - specifies the name of the node.null indicates a wildcard for the node name
basetype - the base type of the attribute. One of the XQItemTyupe.XQBASETYPE_* constants other than XQItemType.XQBASETYPE_UNTYPED or XQItemType.XQBASETYPE_ANYTYPE
typename - the QName of the type. If the QName refers to a predefinied type, it must match the basetype. Can be null.
schemaURI - the URI to the schema. Can be null. This can only be specified if the typename is also specified
Returns:
a new XQItemType representing the XQuery attribute(nodename,basetype, typename,schemaURI) type.
Throws:
XQException - if (1) the underlying object implementing the interface is closed, (2) if the base type is one of: XQItemType.XQBASETYPE_UNTYPED or XQItemType.XQBASETYPE_ANYTYPE, (3) the schema URI is specified and the typename is not specified, (4) the implementation does not support user-defined XML schema types, or (5) if the typename refers to a predefinied type and does not match basetype

createSchemaAttributeType

XQItemType createSchemaAttributeType(QName nodename,
                                     int basetype,
                                     URI schemaURI)
                                     throws XQException
Creates a new XQItemType object representing the XQuery schema-attribute(nodename,basetype,schemaURI) type, with the given node name, base type, and schema URI.

Example - 

     XQConnection conn = ..; // An XQuery connection

     - schema-attribute (name) // schema-attribute name, found in the schema 
                               // available at http://customerschema.com

     conn.createSchemaAttributeType(new QName("name"), 
                  XQItemType.XQBASETYPE_STRING,
                  new URI(http://customerschema.com));

Parameters:
nodename - specifies the name of the node
basetype - the base type of the attribute. One of the XQItemTyupe.XQBASETYPE_* constants other than XQItemType.XQBASETYPE_UNTYPED or XQItemType.XQBASETYPE_ANYTYPE
schemaURI - the URI to the schema. Can be null
Returns:
a new XQItemType representing the XQuery schema-attribute(nodename,basetype, schemaURI) type
Throws:
XQException - if (1) the node name is null, (2) if the base type is one of: XQItemType.XQBASETYPE_UNTYPED or XQItemType.XQBASETYPE_ANYTYPE, (3) the underlying object implementing the interface is closed, or (4) the implementation does not support user-defined XML schema types

createCommentType

XQItemType createCommentType()
                             throws XQException
Creates a new XQItemType object representing the XQuery comment() type. The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_COMMENT.

Example - 
  XQConnection conn = ..; // An XQuery connection
  XQItemType cmttype = conn.createCommentType(); 

  int itemkind = cmttype.getItemKind(); // will be XQItemType.XQITEMKIND_COMMENT
 
  XQExpression expr = conn.createExpression();
  XQSequence result = expr.executeQuery("<!-- comments -->");

  result.next();
  boolean pi = result.instanceOf(cmttype);  // will be true

Returns:
a new XQItemType representing the XQuery comment() type
Throws:
XQException - if the underlying object implementing the interface is closed

createDocumentElementType

XQItemType createDocumentElementType(XQItemType elementType)
                                     throws XQException
Creates a new XQItemType object representing the XQuery document-node(elementType) type containing a single element. The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_DOCUMENT_ELEMENT and the base type set to the item type of the input elementType.

Parameters:
elementType - an XQItemType object representing an XQuery element() type, cannot be null
Returns:
a new XQItemType representing the XQuery document-node(elementType) type containing a single element
Throws:
XQException - if (1) the underlying object implementing the interface is closed or (2) the elementType has an item kind different from XQItemType.XQITEMKIND_ELEMENT, (3) the elementType argument is null, or (4) the implementation does not support user-defined XML schema types

createDocumentSchemaElementType

XQItemType createDocumentSchemaElementType(XQItemType elementType)
                                           throws XQException
Creates a new XQItemType object representing the XQuery document-node(elementType) type containing a single schema-element(...). The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_DOCUMENT_SCHEMA_ELEMENT and the base type set to the item type of the input elementType.

Parameters:
elementType - an XQItemType object representing an XQuery schema-element(...) type, cannot be null
Returns:
a new XQItemType representing the XQuery document-node(elementType) type containing a single schema-element(...) element
Throws:
XQException - if (1) the underlying object implementing the interface is closed or (2) the elementType has an item kind different from XQItemType.XQITEMKIND_SCHEMA_ELEMENT, (3) the elementType argument is null, (4) the implementation does not support user-defined XML schema types

createDocumentType

XQItemType createDocumentType()
                              throws XQException
Creates a new XQItemType object representing the XQuery document-node() type. The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_DOCUMENT.

Returns:
a new XQItemType representing the XQuery document-node() type
Throws:
XQException - if the underlying object implementing the interface is closed

createElementType

XQItemType createElementType(QName nodename,
                             int basetype)
                             throws XQException
Creates a new XQItemType object representing the XQuery element(nodename, basetype) type, with the given node name and base type. This method can be used to create item type for elements with a pre-defined schema type.

Example - 
  XQConnection conn = ..; // An XQuery connection
  - element() // no node name, pass null for the node name

  conn.createElementType(null, XQItemType.XQBASETYPE_ANYTYPE);

  - element (*)  // equivalent to element()

  conn.createElementType(null, XQItemType.XQBASETYPE_ANYTYPE);

  - element(person) // element of name person and any type.

  conn.createElementType(new QName("person"), XQItemType.XQBASETYPE_ANYTYPE); 

  - element(foo:bar) // node name foo:bar, type is anytype

  conn.createElementType(new QName("http://www.foo.com", "bar","foo"), 
                         XQItemType.XQBASETYPE_ANYTYPE);

  - element(foo:bar, xs:integer) // node name foo:bar, type is xs:integer

  conn.createElementType(new QName("http://www.foo.com", "bar","foo"), 
                         XQItemType.XQBASETYPE_INTEGER);

Parameters:
nodename - specifies the name of the node. null indicates a wildcard for the node name
basetype - the base type of the item. One of the XQItemType.XQBASETYPE_* constants
Returns:
a new XQItemType representing the XQuery element(nodename, basetype) type
Throws:
XQException - if (1) the underlying object implementing the interface is closed

createElementType

XQItemType createElementType(QName nodename,
                             int basetype,
                             QName typename,
                             URI schemaURI,
                             boolean allowNill)
                             throws XQException
Creates a new XQItemType object representing the XQuery element(nodename,basetype,typename,schemaURI, allowNill) type, given the node name, base type, schema type name, schema URI, and nilled check. The type name can reference either pre-defined schema types or user-defined types.

Example - 
  XQConnection conn = ..; // An XQuery connection

  - element (person, employee) // element person of type employee
 
  conn.createElementType(new QName("person"), XQItemType.XQBASETYPE_ANYTYPE,
                         new QName("employee"), null ,false);
 
  - element(person, employee ? ) // element person of type employee, whose nilled 
                                 // property may be true or false. 
 
  conn.createElementType(new QName("person"), XQItemType.XQBASETYPE_ANYTYPE,
                         new QName("employee"), null ,true);
 
  - element(foo:bar, po:address) 
  where the prefix foo refers to the namespace http://www.foo.com and the
  prefix po refers to the namespace "http://www.address.com"

  conn.createElementType(new QName("http://www.foo.com", "bar","foo"), 
               XQItemType.XQBASETYPE_ANYTYPE,
               new QName("http://address.com", "address","po"), null, false);

  - element (zip, zipcode) // element zip of type zipchode which derives from
                           // xs:string 

  conn.createElementType(new QName("zip"), XQItemType.XQBASETYPE_STRING,
                         new QName("zipcode"), null, false);

  - element (*, xs:anyType ?)

  conn.createElementType(null, XQItemType.XQBASETYPE_ANYTYPE, null, null, true);

  - element(foo:bar, po:hatsize) 
  where the prefix foo refers to the namespace http://www.foo.com and the
  prefix po refers to the namespace "http://www.hatsizes.com" 
  with schema URI "http://hatschema.com"

  conn.createElementType(new QName("http://www.foo.com", "bar","foo"), 
                      XQItemType.XQBASETYPE_INTEGER,
                      new QName("http://www.hatsizes.com", "hatsize","po"), 
                      new QName("http://hatschema.com"), false);

Parameters:
nodename - specifies the name of the element. null indicates a wildcard for the node name
basetype - the base type of the item. One of the XQItemType.XQBASETYPE_* constants
typename - the QName of the type. If the QName refers to a predefinied type, it must match the basetype. Can be null
schemaURI - the URI to the schema. Can be null. This can only be specified if the typename is also specified
allowNill - the nilled property of the element
Returns:
a new XQItemType representing the XQuery element(nodename,basetype, typename,schemaURI, allowNill) type
Throws:
XQException - if (1) schemaURI is specified but the typename is not specified, (2) the underlying object implementing the interface is closed, (3) the implementation does not support user-defined XML schema types, or (4) if the typename refers to a predefinied type and does not match basetype

createSchemaElementType

XQItemType createSchemaElementType(QName nodename,
                                   int basetype,
                                   URI schemaURI)
                                   throws XQException
Creates a new XQItemType object representing the XQuery schema-element(nodename,basetype,schemaURI) type, given the node name, base type, and the schema URI.

Example - 
     XQConnection conn = ..; // An XQuery connection

     - schema-element (customer) // schema-element person, found in
                                 // the schema available at http://customerschema.com

     conn.createElementType(new QName("customer"), XQItemType.XQBASETYPE_ANYTYPE,
                         new URI("http://customerschema.com"));

Parameters:
nodename - specifies the name of the element
basetype - the base type of the item. One of the XQItemType.XQBASETYPE_* constants
schemaURI - the URI to the schema. Can be null
Returns:
a new XQItemType representing the XQuery schema-element(nodename,basetype, schemaURI) type
Throws:
XQException - if (1) the node name is null, (2) the underlying object implementing the interface is closed, or (3) the implementation does not support user-defined XML schema types

createItemType

XQItemType createItemType()
                          throws XQException
Creates a new XQItemType object representing the XQuery item type. The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_ITEM.

Example - 
  XQConnection conn = ..; // An XQuery connection
  XQItemType typ = conn.createItemType(); // represents the XQuery item type "item()"

Returns:
a new XQItemType representing the XQuery item type
Throws:
XQException - if the underlying object implementing the interface is closed

createNodeType

XQItemType createNodeType()
                          throws XQException
Creates a new XQItemType object representing the XQuery node() type. The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_NODE.

Returns:
a new XQItemType representing the XQuery node() type
Throws:
XQException - if the underlying object implementing the interface is closed

createProcessingInstructionType

XQItemType createProcessingInstructionType(String piTarget)
                                           throws XQException
Creates a new XQItemType object representing the XQuery processing-instruction(piTarget) type. The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_PI. A string literal can be passed to match the PITarget of the processing instruction as described in 2.5.4.2 Matching an Item Type and an Item, XQuery 1.0: An XML Query Language.

Example - 
   XQConnection conn = ..; // An XQuery connection
   XQItemType anypi = conn.createProcessingInstructionType(); 
   XQItemType foopi = conn.createProcessingInstructionType("foo-format");

   XQExpression expr = conn.createExpression();
   XQSequence result = expr.executeQuery("<?format role="output" ?>");
 
   result.next();
   boolean pi = result.instanceOf(anypi);  // will be true
   pi = result.instanceOf(foopi);  // will be false
 
   XQExpression expr = conn.createExpression();
   XQSequence result = expr.executeQuery("<?foo-format role="output" ?>");
   
   result.next();
   boolean pi = result.instanceOf(anypi);  // will be true
   pi = result.instanceOf(foopi);  // will be true

Parameters:
piTarget - the string literal to match the processing instruction's PITarget. A null string value will match all processing instruction nodes
Returns:
a new XQItemType representing the XQuery processing-instruction(piTarget) type
Throws:
XQException - if the underlying object implementing the interface is closed

createSequenceType

XQSequenceType createSequenceType(XQItemType item,
                                  int occurence)
                                  throws XQException
Creates a new sequence type from an item type and occurence indicator.

Parameters:
item - the item type. This parameter must be null if the occurance is XQSequenceType.OCC_EMPTY, and cannot be null for any other occurance indicator
occurence - The occurence of the item type, must be one of XQSequenceType.OCC_ZERO_OR_ONE, XQSequenceType.OCC_EXACTLY_ONE, XQSequenceType.OCC_ZERO_OR_MORE, XQSequenceType.OCC_ONE_OR_MORE, XQSequenceType.OCC_EMPTY
Returns:
a new XQSequenceType representing the type of a sequence
Throws:
XQException - if (1) the item is null and the occurance is not XQSequenceType.OCC_EMPTY, (2) the item is not null and the occurance is XQSequenceType.OCC_EMPTY, (3) the occurence is not one of: XQSequenceType.OCC_ZERO_OR_ONE, XQSequenceType.OCC_EXACTLY_ONE, XQSequenceType.OCC_ZERO_OR_MORE, XQSequenceType.OCC_ONE_OR_MORE, XQSequenceType.OCC_EMPTY or (4) the underlying object implementing the interface is closed

createTextType

XQItemType createTextType()
                          throws XQException
Creates a new XQItemType object representing the XQuery text() type. The XQItemType object will have the item kind set to XQItemType.XQITEMKIND_TEXT.

Returns:
a new XQItemType representing the XQuery text() type
Throws:
XQException - if the underlying object implementing the interface is closed
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