javax.xml.xquery
Interface XQMetaData

public interface XQMetaData

XQMetaData interface provides information about the data source, in various aspects, such as the product name and version identification, supported features, specific behaviors, user information, product limits and so forth.

An object implementing this interface is obtained from the connection object by calling the getMetaData() method, for example:

  XQMetaData metaData = connection.getMetaData();
  String productVersion = metaData.getProductVersion();
    ...
 

Since the metadata object depends on the connection, all its methods would raise an exception if the connection it is created from is no longer valid.

See Also:

XQConnection

Method Summary

int	getMaxExpressionLength() Gets the maximum number of characters allowed in an expression in this data source.
int	getMaxUserNameLength() Gets the maximum number of characters allowed in a user name.
int	getProductMajorVersion() Gets the major version of this product.
int	getProductMinorVersion() Gets the minor version of this product.
java.lang.String	getProductName() Gets the name of this product.
java.lang.String	getProductVersion() Gets the full version of this product.
java.util.Set	getSupportedXQueryEncodings() Returns a set of java.lang.String, each of which specifies a character encoding method the XQJ implmentation supports to parse the XQuery query text.
java.lang.String	getUserName() Gets the user name associated with this connection.
int	getXQJMajorVersion() Gets the major version number of XQJ specification supported by this implementation.
int	getXQJMinorVersion() Gets the minor version number of XQJ specification supported by this implementation.
java.lang.String	getXQJVersion() Gets the full version of XQJ specification supported by this implementation.
boolean	isFullAxisFeatureSupported() Query if XQuery full axis feature is supported in this connection.
boolean	isModuleFeatureSupported() Query if XQuery module feature is supported in this connection.
boolean	isReadOnly() Query if the associated conection is restricted for read only use.
boolean	isSchemaImportFeatureSupported() Query if XQuery schema import feature is supported in this connection.
boolean	isSchemaValidationFeatureSupported() Query if XQuery schema validation feature is supported in this connection.
boolean	isSerializationFeatureSupported() Query if XQuery serialization feature is supported in this connection.
boolean	isStaticTypingExtensionsSupported() Query if XQuery static typing extensions are supported in this connection.
boolean	isStaticTypingFeatureSupported() Query if XQuery static typing feature is supported in this data source.
boolean	isTransactionSupported() Query if transaction is supported in this data source.
boolean	isUserDefinedXMLSchemaTypeSupported() Check if the user defined XML schema type is supported in this connection.
boolean	isXQueryEncodingDeclSupported() Query if the XQuery encoding declaration is supported by the XQJ implementation.
boolean	isXQueryEncodingSupported(java.lang.String encoding) Query if a character encoding method of the XQuery query text is supported by the XQJ implmentation.
boolean	isXQueryXSupported() Query if XQueryX format is supported in this data source.
boolean	wasCreatedFromJDBCConnection() Query if this connection was created from a JDBC connection.

Method Detail

getProductMajorVersion

int getProductMajorVersion()
                           throws XQException

Gets the major version of this product.

Returns:

a integer indicating the major version of this product

Throws:

XQException - if the connection is no longer valid

getProductMinorVersion

int getProductMinorVersion()
                           throws XQException

Gets the minor version of this product.

Returns:

a integer indicating the minor version of this product

Throws:

XQException - if the connection is no longer valid

getProductName

java.lang.String getProductName()
                                throws XQException

Gets the name of this product. The value of string returned by this method is implementation-defined.

Returns:

a string indicating the product name

Throws:

XQException - if the connection is no longer valid

getProductVersion

java.lang.String getProductVersion()
                                   throws XQException

Gets the full version of this product. The format and value of the string returned by this method is implementation-defined.

Returns:

a string indicating the product version

Throws:

XQException - if the connection is no longer valid

getXQJMajorVersion

int getXQJMajorVersion()
                       throws XQException

Gets the major version number of XQJ specification supported by this implementation.

Returns:

an integer indicating the XQJ major version

Throws:

XQException - if the connection is no longer valid

getXQJMinorVersion

int getXQJMinorVersion()
                       throws XQException

Gets the minor version number of XQJ specification supported by this implementation.

Returns:

an integer indicating the XQJ minor version

Throws:

XQException - if the connection is no longer valid

getXQJVersion

java.lang.String getXQJVersion()
                               throws XQException

Gets the full version of XQJ specification supported by this implementation.

Returns:

a string indicating the version of XQJ specification

Throws:

XQException - if the connection is no longer valid

isReadOnly

boolean isReadOnly()
                   throws XQException

Query if the associated conection is restricted for read only use.

Returns:

true if the associated connection is for read-only; false otherwise

Throws:

XQException - if the connection is no longer valid

isXQueryXSupported

boolean isXQueryXSupported()
                           throws XQException

Query if XQueryX format is supported in this data source.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isTransactionSupported

boolean isTransactionSupported()
                               throws XQException

Query if transaction is supported in this data source.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isStaticTypingFeatureSupported

boolean isStaticTypingFeatureSupported()
                                       throws XQException

Query if XQuery static typing feature is supported in this data source.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isSchemaImportFeatureSupported

boolean isSchemaImportFeatureSupported()
                                       throws XQException

Query if XQuery schema import feature is supported in this connection.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isSchemaValidationFeatureSupported

boolean isSchemaValidationFeatureSupported()
                                           throws XQException

Query if XQuery schema validation feature is supported in this connection.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isFullAxisFeatureSupported

boolean isFullAxisFeatureSupported()
                                   throws XQException

Query if XQuery full axis feature is supported in this connection.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isModuleFeatureSupported

boolean isModuleFeatureSupported()
                                 throws XQException

Query if XQuery module feature is supported in this connection.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isSerializationFeatureSupported

boolean isSerializationFeatureSupported()
                                        throws XQException

Query if XQuery serialization feature is supported in this connection.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

isStaticTypingExtensionsSupported

boolean isStaticTypingExtensionsSupported()
                                          throws XQException

Query if XQuery static typing extensions are supported in this connection.

Returns:

true if so; otherwise false

Throws:

XQException - if the connection is no longer valid

getUserName

java.lang.String getUserName()
                             throws XQException

Gets the user name associated with this connection.

Returns:

the user's name

Throws:

XQException - if the connection is no longer valid

getMaxExpressionLength

int getMaxExpressionLength()
                           throws XQException

Gets the maximum number of characters allowed in an expression in this data source.

Returns:

the maximum length of expression as an integer. A zero value means that there is no limit or the limit is unknown

Throws:

XQException - if the connection is no longer valid

getMaxUserNameLength

int getMaxUserNameLength()
                         throws XQException

Gets the maximum number of characters allowed in a user name.

Returns:

the maximum length of user name as an integer. A zero value means that there is no limit or the limit is unknown

Throws:

XQException - if the connection is no longer valid

wasCreatedFromJDBCConnection

boolean wasCreatedFromJDBCConnection()
                                     throws XQException

Query if this connection was created from a JDBC connection.

Returns:

true, if this connection was created from a JDBC connection, false otherwise.

Throws:

XQException - if the connection is no longer valid

isXQueryEncodingDeclSupported

boolean isXQueryEncodingDeclSupported()
                                      throws XQException

Query if the XQuery encoding declaration is supported by the XQJ implementation.

Returns:

true if the XQuery encoding declaration is supported; false otherwise

Throws:

XQException - if the connection is no longer valid

getSupportedXQueryEncodings

java.util.Set getSupportedXQueryEncodings()
                                          throws XQException

Returns a set of java.lang.String, each of which specifies a character encoding method the XQJ implmentation supports to parse the XQuery query text.
For an example, for an XQJ impmentation which is able to parse the XQuery encoded in "UTF-8" or "UTF-16", it returns a java.util.Set of "UTF-8" and "UTF-16". If the implemetation is not able to generate a list of encodings supported, an empty set is returned. If a non-empty set is returned, the encodings returned in this set are guaranteed to be supported. Note that encodings not in the returned set might also be supported. For example, if the set has two encoding methods: 'UTF-8' and 'UTF-16', they are supported by the implementation. However, this does not mean 'Shift-Js' is not supported. It might be supported.

Returns:

a java.util.Set of java.lang.String, each of which is an XQuery query text encoding method

Throws:

XQException - if the connection is no longer valid

isXQueryEncodingSupported

boolean isXQueryEncodingSupported(java.lang.String encoding)
                                  throws XQException

Query if a character encoding method of the XQuery query text is supported by the XQJ implmentation.

Parameters:

encoding - String representing the character encoding method of the XQuery query text.

Returns:

true if an XQuery query character encoding method is supported, false otherwise

Throws:

XQException - if (1) the connection is no longer valid, or (2) the specified encoding parameter is null

isUserDefinedXMLSchemaTypeSupported

boolean isUserDefinedXMLSchemaTypeSupported()
                                            throws XQException

Check if the user defined XML schema type is supported in this connection. If this method returns true, then XQItemAccessor.instanceOf(XQItemType) must be able to determine if the type of an XQItemAccessor is an instance of the XQItemType even if either of them is a user defined XML schema type which is defined by the non-predefined XML schema. The pre-defined XML Schema refers to the XML schema whose schema URL is "http://www.w3.org/2001/XMLSchema"

Returns:

true if the user defined XML schema type is supported in this connection, false otherwise.

Throws:

XQException - if the connection is no longer valid