Java Doc for Ammentos.java in  » Database-ORM » Ammentos » it » biobytes » ammentos » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » Ammentos » it.biobytes.ammentos   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    it.biobytes.ammentos.Ammentos Ammentos public class Ammentos (Code) This class represents the persistence framework itself. Provides all methods for managing objects persistence: save, load, lookup by primary key and delete operations. These operations can be atomic or can be performed into a transaction by using the transaction related methods such as openTransaction(), commitTransaction() and rollbackTransaction(). An internal caching mechanism dramatically optimizes direct lookup() calls. Furthermore is possible to receive persistence events by registering PersistenceListeners objects to the Framework. author:    Davide Deidda Method Summary public static  void addPersistenceListener(PersistenceListener listener)      Adds a PersistenceListener to the framework. protected static  void closeContext()      public static  void closeIteration()      public static  void commitTransaction()      Commits the current transaction. public static  int count(Class<T> c, Query qry)      Counts the objects which match the provided query. public static  int count(Class<T> c, QueryFilter filter)      Counts the objects which match the provided queryfilter. public static  PersistenceContext createContext(DataSource source)      public static  T createInstance(Class<T> c)      Creates a new instance of the provided object. public static  PersistenceContext currentContext()      public static  Transaction currentTransaction()      public static  void delete(T obj)      Deletes the object. public static  void delete(Class<T> c, QueryFilter filter)      Deletes all the objects of class c matching the provided QueryFilter. public static  List<Field> diff(T obj1, T obj2)      public static  DataSource getDataSource()      public static  Connection getDbConnection()      Returns a connection to the underlying database. public static  Metadata getMetadata(Class c)      Returns the metadata for the objects that belong to the provided class. public static  Field getPrimaryKeyField(Class c)      public static  T intern(T obj)      Similarly to java.lang.String.intern() method, returns the internal, cached version of the provided object, if present; otherwise returns the same object and puts the provided one into the cache. public static  Iterable<T> iterate(Class<T> c, Query qry)      public static  T load(Class<T> c, Object primaryKey)      public static  T load(Class<T> c, Object... primaryKeys)      Loads the object with the provided composite primary key. public static  List<T> load(Class<T> c, Query qry)      Loads the objects which match the provided query. public static  List<T> load(Class<T> c, QueryFilter filter)      Loads the objects which match the provided query. protected static  boolean loadDeeply(Class<T> c, T obj, Object primaryKey)      public static  T loadUnique(Class<T> c, Query query)      This method represents a shortcut for loading objects with queries when the expected return value is only one object. public static  T loadUnique(Class<T> c, QueryFilter filter)      This method represents a shortcut for loading objects with queries when the expected return value is only one object. public static  List<T> loadUpdatable(Class<T> c, Query qry)      Returns an updatable list of objects which match the provided query. public static  T lookup(Class<T> c, Object primaryKey)      Lookup the object of the provided class whith the specified primary key. protected static  void openContext(PersistenceContext context)      public static  void openTransaction()      Opens a transaction to the datatabse. public static  void openTransaction(int isolationLevel)      Opens a transaction to the datatabse. public static  void override(T obj)      Saves the provided object instance, regardless the object is already present into the target domain. public static  void removePersistenceListener(PersistenceListener listener)      public static  void rollbackTransaction()      Rolls back the current transaction. public static  void save(T obj)      Saves the provided object instance. public static  void setDataSource(DataSource source)      public static  void validate(Class<T> c, T obj)      Method Detail addPersistenceListener public static void addPersistenceListener(PersistenceListener listener)(Code) Adds a PersistenceListener to the framework. Parameters:   listener - closeContext protected static void closeContext()(Code) closeIteration public static void closeIteration()(Code) commitTransaction public static void commitTransaction() throws PersistenceException(Code) Commits the current transaction. If the commit ends successfully all the objects involved in the transaction are removed from the cache. count public static int count(Class<T> c, Query qry) throws PersistenceException(Code) Counts the objects which match the provided query. Parameters:   c - Parameters:   qry - throws:   it.biobytes.ammentos.PersistenceException - count public static int count(Class<T> c, QueryFilter filter) throws PersistenceException(Code) Counts the objects which match the provided queryfilter. Parameters:   c - Parameters:   filter - throws:   it.biobytes.ammentos.PersistenceException - createContext public static PersistenceContext createContext(DataSource source)(Code) createInstance public static T createInstance(Class<T> c) throws PersistenceException(Code) Creates a new instance of the provided object. Parameters:   c - The class of the object to create throws:   it.biobytes.ammentos.PersistenceException - If any errors occurred while trying to create the instance An instance of the provided class currentContext public static PersistenceContext currentContext()(Code) currentTransaction public static Transaction currentTransaction()(Code) delete public static void delete(T obj) throws PersistenceException(Code) Deletes the object. If a transaction is opened this operation will be actually performed when the commitTransaction() method will be called Parameters:   obj - The object to delete throws:   it.biobytes.ammentos.PersistenceException - delete public static void delete(Class<T> c, QueryFilter filter) throws PersistenceException(Code) Deletes all the objects of class c matching the provided QueryFilter. If a transaction is opened this operation will be actually performed when the commitTransaction() method will be called diff public static List<Field> diff(T obj1, T obj2) throws PersistenceException(Code) Returns a "diff" report for the provided objects getDataSource public static DataSource getDataSource()(Code) Returns the default datasource for this framework The default datasource getDbConnection public static Connection getDbConnection() throws PersistenceException(Code) Returns a connection to the underlying database. The connection will belong to the currently used persistence context throws:   it.biobytes.ammentos.PersistenceException - getMetadata public static Metadata getMetadata(Class c) throws PersistenceException(Code) Returns the metadata for the objects that belong to the provided class. Parameters:   c - The class to get metadata for throws:   it.biobytes.ammentos.PersistenceException - If the provided class does not contain valid metadatainformation The metadata for the provided class getPrimaryKeyField public static Field getPrimaryKeyField(Class c) throws PersistenceException(Code) Gets the primary key field for the objects of the provided class Parameters:   c - throws:   it.biobytes.ammentos.PersistenceException - intern public static T intern(T obj) throws PersistenceException(Code) Similarly to java.lang.String.intern() method, returns the internal, cached version of the provided object, if present; otherwise returns the same object and puts the provided one into the cache. iterate public static Iterable<T> iterate(Class<T> c, Query qry) throws PersistenceException(Code) load public static T load(Class<T> c, Object primaryKey) throws PersistenceException(Code) Loads the object whith the provided primary key Parameters:   c - Parameters:   primaryKey - throws:   it.biobytes.ammentos.PersistenceException - load public static T load(Class<T> c, Object... primaryKeys) throws PersistenceException(Code) Loads the object with the provided composite primary key. Values must be passed in the same order as in PersistentEntity declaration. load public static List<T> load(Class<T> c, Query qry) throws PersistenceException(Code) Loads the objects which match the provided query. The returned list is unmodifiabale. Parameters:   c - Parameters:   qry - throws:   it.biobytes.ammentos.PersistenceException - load public static List<T> load(Class<T> c, QueryFilter filter) throws PersistenceException(Code) Loads the objects which match the provided query. Parameters:   c - Parameters:   filter - throws:   it.biobytes.ammentos.PersistenceException - loadDeeply protected static boolean loadDeeply(Class<T> c, T obj, Object primaryKey) throws PersistenceException(Code) loadUnique public static T loadUnique(Class<T> c, Query query) throws PersistenceException(Code) This method represents a shortcut for loading objects with queries when the expected return value is only one object. A persistenceException will be thrown if the query returns more than one value. Parameters:   c - Parameters:   query - throws:   it.biobytes.ammentos.PersistenceException - loadUnique public static T loadUnique(Class<T> c, QueryFilter filter) throws PersistenceException(Code) This method represents a shortcut for loading objects with queries when the expected return value is only one object. A persistenceException will be thrown if the query returns more than one value. Parameters:   c - Parameters:   query - throws:   it.biobytes.ammentos.PersistenceException - loadUpdatable public static List<T> loadUpdatable(Class<T> c, Query qry) throws PersistenceException(Code) Returns an updatable list of objects which match the provided query. By calling add() and remove() method on this list the objects will be respectively saved or removed from their persistor. lookup public static T lookup(Class<T> c, Object primaryKey) throws PersistenceException(Code) Lookup the object of the provided class whith the specified primary key. This methods uses an internal caching mechanism which dramatically increases the performance, so use this method instead of load(Class,String) whenever is possible to obtain the best performance in retrieving objects. Parameters:   c - Parameters:   primaryKey - throws:   it.biobytes.ammentos.PersistenceException - openContext protected static void openContext(PersistenceContext context) throws PersistenceException(Code) openTransaction public static void openTransaction() throws PersistenceException(Code) Opens a transaction to the datatabse. Each next call to save() method in the same thread will save objects into this transaction, until one between commitTransaction() or rollbackTransaction() is called. The isolation level for the created transaction is TRANSACTION_READ_UNCOMMITTED, what means that dirty reads are allowed. openTransaction public static void openTransaction(int isolationLevel) throws PersistenceException(Code) Opens a transaction to the datatabse. Each next call to save() method in the same thread will save objects into this transaction, until one between commitTransaction() or rollbackTransaction() is called. The isolation level for the created transaction must be one between the constants defined for java.sql.Connection. override public static void override(T obj) throws PersistenceException(Code) Saves the provided object instance, regardless the object is already present into the target domain. If the object is already present the call corresponds to a normale save() method, otherwise a delete() method followed by a new save() method is called. Parameters:   obj - The object to override throws:   it.biobytes.ammentos.PersistenceException - If any errors occurr while saving the object removePersistenceListener public static void removePersistenceListener(PersistenceListener listener)(Code) rollbackTransaction public static void rollbackTransaction() throws PersistenceException(Code) Rolls back the current transaction. The cache of the objects involved in the transaction will not be removed. save public static void save(T obj) throws PersistenceException(Code) Saves the provided object instance. If a transaction is opened this operation will be actually performed when the commitTransaction() method will be called Parameters:   obj - The object to save throws:   it.biobytes.ammentos.PersistenceException - If any errors occurr while saving the object setDataSource public static void setDataSource(DataSource source)(Code) Sets the default datasource for this framework Parameters:   source - validate public static void validate(Class<T> c, T obj) throws PersistenceException(Code) Validates the provided Object using its related validator Parameters:   obj - throws:   it.biobytes.ammentos.PersistenceException - Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)