org.semanticweb.ruqar.db

Class DBSessionManager

java.lang.Object

org.semanticweb.ruqar.db.DBSessionManager

public class DBSessionManager
extends java.lang.Object

Manages mappings. It is responsible for aggregating and executing SQL queries.

Field Summary

Fields

Modifier and Type	Field and Description
DBAccess	dbAccess
java.util.HashSet<java.lang.String>	partialQueries

Constructor Summary

Constructors

Constructor and Description
DBSessionManager() Constructor - one instance per set of rules (engine or module in engine).
DBSessionManager(java.util.Hashtable<java.lang.String,DBMapping> mappings) Constructor - one instance per set of rules (engine or module in engine).

Method Summary

Methods

Modifier and Type	Method and Description
void	addExampleMappings() Adds examplary mappgins to the session manager
void	addMapping(DBMapping mapping) Adds mapping to an instance of DBSessionManager
void	addTask(java.lang.String ruleName, java.lang.String fieldsAndValues) Method adds values (called from a reasoning engine) connected with the particular mapping (ruleName is equivalent to mapping id).
void	cleanQueries() Removes all saved SQL queries.
java.util.Hashtable<java.lang.String,java.util.List<javax.sql.rowset.CachedRowSet>>	execute() Executes SQL queries and return results in a List identified by mapping (ruleName = mapping id).
java.util.List<Atom>	executeAndGetAtoms() Executes SQL queries and return results as List expressed in the ASRF syntax.
java.util.Hashtable<java.lang.String,DBMapping>	getMappings() Returns 's.
static void	main(java.lang.String[] args)
void	setMappings(java.util.Hashtable<java.lang.String,DBMapping> mappings) Sets 's.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

dbAccess

public DBAccess dbAccess

partialQueries

public java.util.HashSet<java.lang.String> partialQueries

Constructor Detail

DBSessionManager

public DBSessionManager()

Constructor - one instance per set of rules (engine or module in engine).

DBSessionManager

public DBSessionManager(java.util.Hashtable<java.lang.String,DBMapping> mappings)

Constructor - one instance per set of rules (engine or module in engine).

Method Detail

addExampleMappings

public void addExampleMappings()

Adds examplary mappgins to the session manager

addMapping

public void addMapping(DBMapping mapping)

Adds mapping to an instance of DBSessionManager

Parameters:

mapping -

addTask

public void addTask(java.lang.String ruleName,
           java.lang.String fieldsAndValues)

Method adds values (called from a reasoning engine) connected with the particular mapping (ruleName is equivalent to mapping id).

Parameters:

ruleName -

fieldsAndValues -

cleanQueries

public void cleanQueries()

Removes all saved SQL queries. It is recommended to execute before the next reasoning task (or just after calling execute()/executeAndGetAtoms() method).

execute

public java.util.Hashtable<java.lang.String,java.util.List<javax.sql.rowset.CachedRowSet>> execute()

Executes SQL queries and return results in a List identified by mapping (ruleName = mapping id).

executeAndGetAtoms

public java.util.List<Atom> executeAndGetAtoms()

Executes SQL queries and return results as List expressed in the ASRF syntax.

getMappings

public java.util.Hashtable<java.lang.String,DBMapping> getMappings()

Returns 's.

Returns:

main

public static void main(java.lang.String[] args)

setMappings

public void setMappings(java.util.Hashtable<java.lang.String,DBMapping> mappings)

Sets 's.