XQJ v1.0, Jan 14, 2008

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object depends on the connection, all its methods would raise an exception if the connection it is created from is no longer valid.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

XQJ v1.0, Jan 14, 2008

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