javax.xml.xquery

Interface XQStaticContext

public interface XQStaticContext

An XQStaticContext represents default values for various XQuery Static Context Components. Further it includes the static XQJ properties for an XQExpression or XQPreparedExpression object.

The following XQuery Static Context Components are supported through the XQStaticContext interface:

• Statically known namespaces
• Default element/type namespace
• Default function namespace
• Context item static type
• Default collation
• Construction mode
• Ordering mode
• Default order for empty sequences
• Boundary-space policy
• Copy-namespaces mode
• Base URI

As described in the XQuery specification, each of these default values can be overridden or augmented in the query prolog.

In addition XQStaticContext includes the static XQJ properties for an XQExpression or XQPreparedExpression object:

• Binding mode
• Holdability of the result sequences
• Scrollability of the result sequences
• Query language
• Query timeout

Note that XQStaticContext is a value object, changing attributes in such object doesn't affect any existing XQExpression or XQPreparedExpression object.
In order to take effect, the application needs to explicitly change the XQConnection default values, or specify an XQStaticContext object when creating an XQExpression or XQPreparedExpression.

  XQConnection conn = XQDatasource.getConnection();
  // get the default values from the implementation
  XQStaticContext cntxt = conn.getStaticContext();
  // change the base uri
  cntxt.setBaseURI("http://www.foo.com/xml/");
  // change the implementation defaults
   conn.setStaticContext(cntxt);

  // create an XQExpression using the new defaults
  XQExpression expr1 = conn.createExpression();

  // creat an XQExpression, using BaseURI "file:///root/user/john/"
  cntxt.setBaseURI("file:///root/user/john/");
  XQExpression expr2 = conn.createExpression(cntxt);
  ...
 

Method Summary

Modifier and Type	Method and Description
void	declareNamespace(String prefix, String uri) Declares a namespace prefix and associates it with a namespace URI.
String	getBaseURI() Gets the Base URI, if set in the static context, else the empty string.
int	getBindingMode() Gets the value of the binding mode property.
int	getBoundarySpacePolicy() Gets the boundary-space policy defined in the static context.
int	getConstructionMode() Gets the construction mode defined in the static context.
XQItemType	getContextItemStaticType() Gets the static type of the context item.
int	getCopyNamespacesModeInherit() Gets the inherit part of the copy-namespaces mode defined in the static context.
int	getCopyNamespacesModePreserve() Gets the preserve part of the copy-namespaces mode defined in the static context.
String	getDefaultCollation() Gets the URI of the default collation.
String	getDefaultElementTypeNamespace() Gets the URI of the default element/type namespace, the empty string if not set.
String	getDefaultFunctionNamespace() Gets the URI of the default function namespace, the empty string if not set.
int	getDefaultOrderForEmptySequences() Gets the default order for empty sequences defined in the static context.
int	getHoldability() Gets the value of the holdability property.
String[]	getNamespacePrefixes() Returns the prefixes of all the statically known namespaces.
String	getNamespaceURI(String prefix) Retrieves the namespace URI associated with a prefix.
int	getOrderingMode() Gets the ordering mode defined in the static context.
int	getQueryLanguageTypeAndVersion() Gets the value of the language type and version property.
int	getQueryTimeout() Retrieves the number of seconds an implementation will wait for a query to execute.
int	getScrollability() Gets the value of the scrollability property.
void	setBaseURI(String baseUri) Sets the Base URI in the static context, specify the empty string to make it undefined.
void	setBindingMode(int bindingMode) Sets the binding mode property.
void	setBoundarySpacePolicy(int policy) Sets the boundary-space policy in the static context.
void	setConstructionMode(int mode) Sets the construction mode in the static context.
void	setContextItemStaticType(XQItemType contextItemType) Sets the static type of the context item, specify null to make it unspecified.
void	setCopyNamespacesModeInherit(int mode) Sets the inherit part of the copy-namespaces mode in the static context.
void	setCopyNamespacesModePreserve(int mode) Sets the preserve part of the copy-namespaces mode in the static context.
void	setDefaultCollation(String uri) Sets the URI of the default collation.
void	setDefaultElementTypeNamespace(String uri) Sets the URI of the default element/type namespace, the empty string to make it unspecified.
void	setDefaultFunctionNamespace(String uri) Sets the URI of the default function namespace, the empty string to make it unspecified.
void	setDefaultOrderForEmptySequences(int order) Sets the default order for empty sequences in the static context.
void	setHoldability(int holdability) Sets the holdability property.
void	setOrderingMode(int mode) Sets the ordering mode in the static context.
void	setQueryLanguageTypeAndVersion(int langType) Sets the input query language type and version.
void	setQueryTimeout(int seconds) Sets the number of seconds an implementation will wait for a query to execute.
void	setScrollability(int scrollability) Sets the scrollability of the result sequence.

Method Detail

getNamespacePrefixes

String[] getNamespacePrefixes()

Returns the prefixes of all the statically known namespaces. Use the getNamespaceURI method to look up the namespace URI corresponding to a specific prefix.

Returns:

String array containing the namespace prefixes. Cannot be null

getNamespaceURI

String getNamespaceURI(String prefix)
                throws XQException

Retrieves the namespace URI associated with a prefix. An XQException is thrown if an unknown prefix is specified, i.e. a prefix not returned by the getInScopeNamespacePrefixes method.

Parameters:

prefix - the prefix for which the namespace URI is sought. Cannot be null

Returns:

the namespace URI. Cannot be null

Throws:

XQException - if a null prefix is specified or if the prefix is unknown

declareNamespace

void declareNamespace(String prefix,
                      String uri)
               throws XQException

Declares a namespace prefix and associates it with a namespace URI. If the namespace URI is the empty string, the prefix is removed from the in-scope namespace definitions.

Parameters:

prefix - the prefix for the namespace URI

uri - the namespace URI. An empty string undeclares the specific prefix. Cannot be null

Throws:

XQException - if (1) a null prefix, or (2) a null namespace URI is specified

getDefaultElementTypeNamespace

String getDefaultElementTypeNamespace()

Gets the URI of the default element/type namespace, the empty string if not set.

Returns:

the URI of the default element/type namespace, if set, else the empty string. Cannot be null

setDefaultElementTypeNamespace

void setDefaultElementTypeNamespace(String uri)
                             throws XQException

Sets the URI of the default element/type namespace, the empty string to make it unspecified.

Parameters:

uri - the namespace URI of the default element/type namespace, the empty string to make it unspecified. Cannot be null.

Throws:

XQException - if a null uri is specified

getDefaultFunctionNamespace

String getDefaultFunctionNamespace()

Gets the URI of the default function namespace, the empty string if not set.

Returns:

the URI of the default function namespace, if set, else the empty string. Cannot be null

setDefaultFunctionNamespace

void setDefaultFunctionNamespace(String uri)
                          throws XQException

Sets the URI of the default function namespace, the empty string to make it unspecified.

Parameters:

uri - the namespace URI of the default function namespace, the empty string to make it unspecified. Cannot be null.

Throws:

XQException - if a null URI is specified

getContextItemStaticType

XQItemType getContextItemStaticType()

Gets the static type of the context item. null if unspecified.

Returns:

the static type of the context item, if set, else null

setContextItemStaticType

void setContextItemStaticType(XQItemType contextItemType)
                       throws XQException

Sets the static type of the context item, specify null to make it unspecified.

Parameters:

contextItemType - the static type of the context item; null if unspecified.

Throws:

XQException - if the contextItemType is not a valid XQItemType

getDefaultCollation

String getDefaultCollation()

Gets the URI of the default collation.

Returns:

the URI of the default collation. Cannot be null.

setDefaultCollation

void setDefaultCollation(String uri)
                  throws XQException

Sets the URI of the default collation.

Parameters:

uri - the namespace URI of the default collation. Cannot be null.

Throws:

XQException - if a null URI is specified

getConstructionMode

int getConstructionMode()

Gets the construction mode defined in the static context.

Returns:

construction mode value. One of: XQConstants.CONSTRUCTION_MODE_PRESERVE, XQConstants.CONSTRUCTION_MODE_STRIP

setConstructionMode

void setConstructionMode(int mode)
                  throws XQException

Sets the construction mode in the static context.

Parameters:

mode - construction mode value. One of: XQConstants.CONSTRUCTION_MODE_PRESERVE, XQConstants.CONSTRUCTION_MODE_STRIP.

Throws:

XQException - the specified mode is different from XQConstants.CONSTRUCTION_MODE_PRESERVE, XQConstants.CONSTRUCTION_MODE_STRIP

getOrderingMode

int getOrderingMode()

Gets the ordering mode defined in the static context.

Returns:

ordering mode value. One of: XQConstants.ORDERING_MODE_ORDERED, XQConstants.ORDERING_MODE_UNORDERED.

setOrderingMode

void setOrderingMode(int mode)
              throws XQException

Sets the ordering mode in the static context.

Parameters:

mode - ordering mode value. One of: XQConstants.ORDERING_MODE_ORDERED, XQConstants.ORDERING_MODE_UNORDERED.

Throws:

XQException - the specified mode is different from XQConstants.ORDERING_MODE_ORDERED, XQConstants.ORDERING_MODE_UNORDERED

getDefaultOrderForEmptySequences

int getDefaultOrderForEmptySequences()

Gets the default order for empty sequences defined in the static context.

Returns:

default order for empty sequences value. One of: XQConstants.DEFAULT_ORDER_FOR_EMPTY_SEQUENCES_GREATEST, XQConstants.DEFAULT_ORDER_FOR_EMPTY_SEQUENCES_LEAST.

setDefaultOrderForEmptySequences

void setDefaultOrderForEmptySequences(int order)
                               throws XQException

Sets the default order for empty sequences in the static context.

Parameters:

order - the default order for empty sequences. One of: XQConstants.DEFAULT_ORDER_FOR_EMPTY_SEQUENCES_GREATEST, XQConstants.DEFAULT_ORDER_FOR_EMPTY_SEQUENCES_LEAST.

Throws:

XQException - the specified order for empty sequences is different from XQConstants.DEFAULT_ORDER_FOR_EMPTY_SEQUENCES_GREATEST, XQConstants.DEFAULT_ORDER_FOR_EMPTY_SEQUENCES_LEAST

getBoundarySpacePolicy

int getBoundarySpacePolicy()

Gets the boundary-space policy defined in the static context.

Returns:

the boundary-space policy value. One of: XQConstants.BOUNDARY_SPACE_PRESERVE, XQConstants.BOUNDARY_SPACE_STRIP.

setBoundarySpacePolicy

void setBoundarySpacePolicy(int policy)
                     throws XQException

Sets the boundary-space policy in the static context.

Parameters:

policy - boundary space policy. One of: XQConstants.BOUNDARY_SPACE_PRESERVE, XQConstants.BOUNDARY_SPACE_STRIP.

Throws:

XQException - the specified mode is different from XQConstants.BOUNDARY_SPACE_PRESERVE, XQConstants.BOUNDARY_SPACE_STRIP

getCopyNamespacesModePreserve

int getCopyNamespacesModePreserve()

Gets the preserve part of the copy-namespaces mode defined in the static context.

Returns:

construction mode value. One of: XQConstants.COPY_NAMESPACES_MODE_PRESERVE, XQConstants.COPY_NAMESPACES_MODE_NO_PRESERVE.

setCopyNamespacesModePreserve

void setCopyNamespacesModePreserve(int mode)
                            throws XQException

Sets the preserve part of the copy-namespaces mode in the static context.

Parameters:

mode - ordering mode value. One of: XQConstants.COPY_NAMESPACES_MODE_PRESERVE, XQConstants.COPY_NAMESPACES_MODE_NO_PRESERVE.

Throws:

XQException - the specified mode is different from XQConstants.COPY_NAMESPACES_MODE_PRESERVE, XQConstants.COPY_NAMESPACES_MODE_NO_PRESERVE

getCopyNamespacesModeInherit

int getCopyNamespacesModeInherit()

Gets the inherit part of the copy-namespaces mode defined in the static context.

Returns:

construction mode value. One of: XQConstants.COPY_NAMESPACES_MODE_INHERIT, XQConstants.COPY_NAMESPACES_MODE_NO_INHERIT.

setCopyNamespacesModeInherit

void setCopyNamespacesModeInherit(int mode)
                           throws XQException

Sets the inherit part of the copy-namespaces mode in the static context.

Parameters:

mode - ordering mode value. One of: XQConstants.COPY_NAMESPACES_MODE_INHERIT, XQConstants.COPY_NAMESPACES_MODE_NO_INHERIT.

Throws:

XQException - the specified mode is different from XQConstants.COPY_NAMESPACES_MODE_INHERIT, XQConstants.COPY_NAMESPACES_MODE_NO_INHERIT

getBaseURI

String getBaseURI()

Gets the Base URI, if set in the static context, else the empty string.

Returns:

the base URI, if set, else the empty string. Cannot be null..

setBaseURI

void setBaseURI(String baseUri)
         throws XQException

Sets the Base URI in the static context, specify the empty string to make it undefined.

Parameters:

baseUri - the new baseUri, or empty string to make it undefined. Cannot be null.

Throws:

XQException - if a null base uri is specified

getBindingMode

int getBindingMode()

Gets the value of the binding mode property. By default an XQJ implementation operates in immediate binding mode.

Returns:

the binding mode. One of XQConstants.BINDING_MODE_IMMEDIATE, orXQConstants.BINDING_MODE_DEFERRED.

setBindingMode

void setBindingMode(int bindingMode)
             throws XQException

Sets the binding mode property. By default an XQJ implementation operates in immediate binding mode.

Parameters:

bindingMode - the binding mode. One of: XQConstants.BINDING_MODE_IMMEDIATE, orXQConstants.BINDING_MODE_DEFERRED.

Throws:

XQException - the specified mode is different from XQConstants.BINDING_MODE_IMMEDIATE, XQConstants.BINDING_MODE_DEFERRED

getHoldability

int getHoldability()

Gets the value of the holdability property.

Returns:

the type of a result's holdability. One of: XQConstants.HOLDTYPE_HOLD_CURSORS_OVER_COMMIT, or XQConstants.HOLDTYPE_CLOSE_CURSORS_AT_COMMIT.

setHoldability

void setHoldability(int holdability)
             throws XQException

Sets the holdability property.

Parameters:

holdability - the holdability of the result. One of: XQConstants.HOLDTYPE_HOLD_CURSORS_OVER_COMMIT, or XQConstants.HOLDTYPE_CLOSE_CURSORS_AT_COMMIT.

Throws:

XQException - the specified holdability is different from XQConstants.HOLDTYPE_HOLD_CURSORS_OVER_COMMIT, XQConstants.HOLDTYPE_CLOSE_CURSORS_AT_COMMIT

getQueryLanguageTypeAndVersion

int getQueryLanguageTypeAndVersion()

Gets the value of the language type and version property. By default an XQJ implementation's default is XQConstants.LANGTYPE_XQUERY.

Returns:

the language type and version. One of: XQConstants.LANGTYPE_XQUERY, or XQConstants.LANGTYPE_XQUERYX or a negative value indicating a vendor specific query language type and version.

setQueryLanguageTypeAndVersion

void setQueryLanguageTypeAndVersion(int langType)
                             throws XQException

Sets the input query language type and version. When this is set to a particular language type and version, then the query is assumed to be in that language and version.

Parameters:

langType - the query language type and version of the inputs. One of: XQConstants.LANGTYPE_XQUERY (default), or XQConstants.LANGTYPE_XQUERYX. A negative number indicates a vendor specific query language type and version.

Throws:

XQException - the specified langtype is different from XQConstants.LANGTYPE_XQUERY, XQConstants.LANGTYPE_XQUERYX and is not negative

getScrollability

int getScrollability()

Gets the value of the scrollability property. By default query results are forward only.

Returns:

the type of a result's scrollability. One of: XQConstants.SCROLLTYPE_FORWARD_ONLY, or XQConstants.SCROLLTYPE_SCROLLABLE.

setScrollability

void setScrollability(int scrollability)
               throws XQException

Sets the scrollability of the result sequence. By default query results are forward only.

Parameters:

scrollability - the scrollability of the result. One of: XQConstants.SCROLLTYPE_FORWARD_ONLY, or XQConstants.SCROLLTYPE_SCROLLABLE.

Throws:

XQException - the specified crollability type is different from XQConstants.SCROLLTYPE_FORWARD_ONLY, XQConstants.SCROLLTYPE_SCROLLABLE

getQueryTimeout

int getQueryTimeout()

Retrieves the number of seconds an implementation will wait for a query to execute.

Returns:

the query execution timeout value in seconds. A value of 0 indicates no limit.

setQueryTimeout

void setQueryTimeout(int seconds)
              throws XQException

Sets the number of seconds an implementation will wait for a query to execute. If the implementation does not support query timeout it can ignore the specified timeout value. It the limit is exceeded, the behavor of the query is the same as an execution of a cancel by another thread.

Parameters:

seconds - the query execution timeout value in seconds. A value of 0 indicates no limit

Throws:

XQException - if the passed in value is negative