Package com.saxonica.xqj

Class SaxonXQDataSource

java.lang.Object
com.saxonica.xqj.SaxonXQDataSource
All Implemented Interfaces:
XQDataSource, Configuration.ApiProvider
public class SaxonXQDataSource extends Object implements XQDataSource, Configuration.ApiProvider
Saxon implementation of the XQJ XQDataSource interface. The first action of a client application is to instantiate a SaxonXQDataSource. This is done directly: there is no factory class as with JAXP. An application that does not want compile-time references to the Saxon XQJ implementation can instantiate this class dynamically using the reflection API (class.newInstance()).

For full Javadoc descriptions of the public methods, see the XQJ specification.

  • Constructor Details

    • SaxonXQDataSource

      public SaxonXQDataSource()
      Create a SaxonXQDataSource using a default configuration. The Configuration will be an EE, PE, or HE configuration depending on the what is found on the classpath

    • SaxonXQDataSource

      public SaxonXQDataSource(Configuration config)
      Create a Saxon XQDataSource with a specific configuration
      Parameters:
      config - The Saxon configuration to be used

  • Method Details

    • getConfiguration

      public Configuration getConfiguration()
      Get the Saxon Configuration in use. Changes made to this Configuration will affect this data source and XQJ connections created from it (either before or afterwards). Equally, changes made to this SaxonXQDataSource are reflected in the Configuration object (which means they also impact any other SaxonXQDataSource objects that share the same Configuration).
      Returns:
      the configuration in use.

    • getConnection

      public XQConnection getConnection()
      Description copied from interface: XQDataSource
      Attempts to create a connection to an XML datasource.
      Specified by:
      getConnection in interface XQDataSource
      Returns:
      a connection to the XML datasource

    • getConnection

      public XQConnection getConnection(Connection con) throws XQException
      Get a connection based on an underlying JDBC connection
      Specified by:
      getConnection in interface XQDataSource
      Parameters:
      con - the JDBC connection
      Returns:
      a connection based on an underlying JDBC connection
      Throws:
      XQException - The Saxon implementation of this method always throws an XQException, indicating that Saxon does not support connection to a JDBC data source.

    • getConnection

      public XQConnection getConnection(String username, String password)
      Get a connection, by supplying a username and password. The Saxon implementation of this is equivalent to the default constructor: the username and password are ignored.
      Specified by:
      getConnection in interface XQDataSource
      Parameters:
      username - the user name
      password - the password
      Returns:
      a connection

    • getLoginTimeout

      public int getLoginTimeout()
      Description copied from interface: XQDataSource
      Gets the maximum time in seconds that this datasource can wait while attempting to connect to a database. A value of zero means that the timeout is the default system timeout if there is one; otherwise, it means that there is no timeout. When a XQDataSource object is created, the login timeout is initially zero. It is implementation-defined whether the returned login timeout is actually used by the data source implementation.
      Specified by:
      getLoginTimeout in interface XQDataSource
      Returns:
      the datasource login time limit

    • getLogWriter

      public PrintWriter getLogWriter()
      Description copied from interface: XQDataSource
      Retrieves the log writer for this XQDataSource object. The log writer is a character output stream to which all logging and tracing messages for this datasource will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. When a XQDataSource object is created, the log writer is initially null; in other words, the default is for logging to be disabled.
      Specified by:
      getLogWriter in interface XQDataSource
      Returns:
      the log writer for this datasource or null if logging is disabled

    • getProperty

      public String getProperty(String name) throws XQException
      Get a configuration property setting. The properties that are supported, and their meanings, are the same as the properties that can be obtained using "get" methods; for example getProperty("dtdValidation") returns the same result as getDtdValidation().

      Further Saxon configuration properties are available using the URIs defined as constants in FeatureKeys

      Specified by:
      getProperty in interface XQDataSource
      Parameters:
      name - the name of the configuration property
      Returns:
      the value of the configuration property. Note that in the case of on/off properties this will be returned as the string true/false
      Throws:
      XQException - if the property name or value is invalid

    • getSupportedPropertyNames

      public String[] getSupportedPropertyNames()
      Description copied from interface: XQDataSource
      Returns an array containing the property names supported by this XQDataSource.

      Implementations that support user name and password must recognize the user name and password properties listed below.

      • user: the user name to use for creating a connection
      • password: the password to use for creating a connection

      Any additional properties are implementation-defined.

      Specified by:
      getSupportedPropertyNames in interface XQDataSource
      Returns:
      String[] an array of property names supported by this implementation

    • setLoginTimeout

      public void setLoginTimeout(int seconds)
      Description copied from interface: XQDataSource
      Sets the maximum time in seconds that this datasource will wait while attempting to connect to a database. A value of zero specifies that the timeout is the default system timeout if there is one; otherwise, it specifies that there is no timeout. When a XQDataSource object is created, the login timeout is initially zero. It is implementation-defined whether the specified login timeout is actually used by the data source implementation. If the connection is created over an existing JDBC connection, then the login timeout value from the underlying JDBC connection may be used.
      Specified by:
      setLoginTimeout in interface XQDataSource
      Parameters:
      seconds - the datasource login time limit

    • setLogWriter

      public void setLogWriter(PrintWriter out)
      Description copied from interface: XQDataSource
      Sets the log writer for this XQDataSource object to the given java.io.PrintWriter object. The log writer is a character output stream to which all logging and tracing messages for this datasource will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. When a XQDataSource object is created the log writer is initially null; in other words, the default is for logging to be disabled.
      Specified by:
      setLogWriter in interface XQDataSource
      Parameters:
      out - the new log writer; to disable logging, set to null

    • setProperties

      public void setProperties(Properties props) throws XQException
      Description copied from interface: XQDataSource
      Sets the data source properties from the specified Properties instance. Properties set before this call will still apply but those with the same name as any of these properties will be replaced. Properties set after this call also apply and may replace properties set during this call.

      If the implementation does not support one or more of the given property names, or if it can determine that the value given for a specific property is invalid, then an exception is thrown. If an exception is thrown, then no previous value is overwritten. is invalid, then an exception is raised.

      Specified by:
      setProperties in interface XQDataSource
      Parameters:
      props - the list of properties to set
      Throws:
      XQException - if (1) a given property is not recognized, (2) the value for a given property is determined to be invalid, or (3) the props parameter is null

    • setProperty

      public void setProperty(String name, String value) throws XQException
      Set a configuration property. The properties that are supported, and their meanings, are the same as the properties that can be obtained using "set" methods; for example setProperty("dtdValidation", "true") has the same effect as setDtdValidation("true").

      Further Saxon configuration properties are available using the URIs defined as constants in FeatureKeys

      Specified by:
      setProperty in interface XQDataSource
      Parameters:
      name - the name of the configuration property
      value - the value of the configuration property
      Throws:
      XQException - if the property name or value is invalid

    • setAllowExternalFunctions

      public void setAllowExternalFunctions(String value)
      Say whether queries are allowed to call external functions.
      Parameters:
      value - set to "true" if external function calls are allowed (default) or "false" otherwise

    • getAllowExternalFunctions

      public String getAllowExternalFunctions()
      Ask whether queries are allowed to call external functions.
      Returns:
      "true" if external function calls are allowed, "false" otherwise

    • setDtdValidation

      public void setDtdValidation(String value)
      Say whether source documents are to be parsed with DTD validation enabled
      Parameters:
      value - "true" if DTD validation is to be enabled, otherwise "false". Default is "false".

    • getDtdValidation

      public String getDtdValidation()
      Ask whether source documents are to be parsed with DTD validation enabled
      Returns:
      "true" if DTD validation is to be enabled, otherwise "false". Default is "false".

    • setExpandAttributeDefaults

      public void setExpandAttributeDefaults(String value)
      Say whether whether fixed and default values defined in a schema or DTD will be expanded. By default, or if the value is "true" (and for conformance with the specification) validation against a DTD or schema will cause default values defined in the schema or DTD to be inserted into the document. Setting this feature to "false" suppresses this behaviour. In the case of DTD-defined defaults this only works if the XML parser reports whether each attribute was specified in the source or generated by expanding a default value. Not all XML parsers report this information.
      Parameters:
      value - "true" if default values are to be expanded, otherwise "false". Default is "true".

    • getExpandAttributeDefaults

      public String getExpandAttributeDefaults()
      Ask whether fixed or default values defined in a schema or DTD will be expanded
      Returns:
      "true" if such values will be expanded, otherwise "false"

    • setExpandXInclude

      public void setExpandXInclude(String value)
      Say whether XInclude processing is to be applied to source documents
      Parameters:
      value - "true" if XInclude directives are to expanded, otherwise "false". Default is "false".

    • getExpandXInclude

      public String getExpandXInclude()
      Ask whether XInclude processing is to be applied to source documents
      Returns:
      "true" if XInclude directives are to expanded, otherwise "false". Default is "false".

    • setRetainLineNumbers

      public void setRetainLineNumbers(String value)
      Say whether source documents should have line and column information retained. This information is available via extension functions saxon:line-number() and saxon:column-number()
      Parameters:
      value - "true" if line and column information is to be retained, otherwise "false". Default is "false".

    • getRetainLineNumbers

      public String getRetainLineNumbers()
      Ask whether line and column information will be retained for source documents
      Returns:
      "true" if line and column information is retained, otherwise "false"

    • setSchemaValidationMode

      public void setSchemaValidationMode(String value)
      Say whether source documents should be validated against a schema
      Parameters:
      value - set to "strict" if source documents are to be subjected to strict validation, "lax" if source documents are to be subjected to lax validation, "skip" if source documents are not to be subjected to schema validation

    • getSchemaValidationMode

      public String getSchemaValidationMode()
      Ask whether source documents will be validated against a schema
      Returns:
      "strict" if source documents are to be subjected to strict validation, "lax" if source documents are to be subjected to lax validation, "skip" if source documents are not to be subjected to schema validation

    • setStripWhitespace

      public void setStripWhitespace(String value)
      Say whether whitespace should be stripped when loading source documents
      Parameters:
      value - "all" if all whitespace text nodes are to be stripped, "ignorable" if only whitespace text nodes in elements defined in a schema or DTD as having element-only content are to be stripped, "none" if no whitespace text nodes are to be stripped

    • getStripWhitespace

      public String getStripWhitespace()
      Ask whether whitespace will be stripped when loading source documents
      Returns:
      "all" if all whitespace text nodes are to be stripped, "ignorable" if only whitespace text nodes in elements defined in a schema or DTD as having element-only content are to be stripped, "none" if no whitespace text nodes are to be stripped

    • setUseXsiSchemaLocation

      public void setUseXsiSchemaLocation(String value)
      Say whether the schema processor is to take account of xsi:schemaLocation and xsi:noNamespaceSchemaLocation attributes encountered in an instance document being validated
      Parameters:
      value - set to "true" if these attributes are to be recognized (default) or "false" otherwise

    • getUseXsiSchemaLocation

      public String getUseXsiSchemaLocation()
      Ask whether the schema processor is to take account of xsi:schemaLocation and xsi:noNamespaceSchemaLocation attributes encountered in an instance document being validated
      Returns:
      "true" if these attributes are to be recognized (default) or "false" otherwise

    • setXmlVersion

      public void setXmlVersion(String value)
      Say whether XML 1.0 or XML 1.1 rules for XML names are to be followed
      Parameters:
      value - "1.0" (default) if XML 1.0 rules are to be used, "1.1" if XML 1.1 rules apply

    • getXmlVersion

      public String getXmlVersion()
      Ask whether XML 1.0 or XML 1.1 rules for XML names are to be followed
      Returns:
      "1.0" if XML 1.0 rules are to be used, "1.1" if XML 1.1 rules apply

    • setXsdVersion

      public void setXsdVersion(String value)
      Say whether XML Schema 1.0 syntax must be used or whether XML Schema 1.1 features are allowed
      Parameters:
      value - "1.0" (default) if XML Schema 1.0 rules are to be followed, "1.1" if XML Schema 1.1 features may be used

    • getXsdVersion

      public String getXsdVersion()
      Ask whether XML Schema 1.0 syntax must be used or whether XML Schema 1.1 features are allowed
      Returns:
      "1.0" (default) if XML Schema 1.0 rules are to be followed, "1.1" if XML Schema 1.1 features may be used

    • registerExtensionFunction

      public void registerExtensionFunction(ExtensionFunctionDefinition function)
      Register an extension function that is to be made available within any query. This method allows deep integration of an extension function implemented as an instance of ExtensionFunctionDefinition, using an arbitrary name and namespace. This supplements the ability to call arbitrary Java methods using a namespace and local name that are related to the Java class and method name.

      This method is a Saxon extension to the XQJ interface

      Parameters:
      function - the class that implements the extension function. This must be a class that extends ExtensionFunctionCall, and it must have a public zero-argument constructor
      Throws:
      IllegalArgumentException - if the class cannot be instantiated or does not extend ExtensionFunctionCall
      Since:
      9.2