net.ontopia.persistence.proxy
Class SQLCollectionAccess

java.lang.Object
  net.ontopia.persistence.proxy.SQLCollectionAccess

All Implemented Interfaces:

ClassAccessIF

public class SQLCollectionAccess
extends java.lang.Object
implements ClassAccessIF

INTERNAL: Class that performs the task of accessing and manipulating "collection" type instances in the database.

NOTE: Collection type instances must have an identity field and exactly one value field.

Field Summary

protected RDBMSAccess	access
protected ClassInfoIF	cinfo
protected boolean	debug
protected FieldInfoIF	identity_field
protected java.lang.String	sql_add
protected java.lang.String	sql_delete
protected java.lang.String	sql_load
protected java.lang.String	sql_remove
protected FieldInfoIF	value_field

Constructor Summary

SQLCollectionAccess(RDBMSAccess access, ClassInfoIF cinfo)

Method Summary

protected void	bindParametersAddRemove(java.sql.PreparedStatement stm, ObjectAccessIF oaccess, IdentityIF identity, java.lang.Object element)
protected void	bindParametersDelete(java.sql.PreparedStatement stm, IdentityIF identity)
void	create(ObjectAccessIF oaccess, java.lang.Object object) INTERNAL: Creates the new object in the database.
void	delete(ObjectAccessIF oaccess, java.lang.Object object) INTERNAL: Deletes the object identity from the database.
boolean	load(AccessRegistrarIF registrar, IdentityIF identity) INTERNAL: Loads the object identity from the database.
java.lang.Object	loadField(AccessRegistrarIF registrar, IdentityIF identity, int field) INTERNAL: Loads the specified object field for the given identity from the database.
java.lang.Object	loadFieldMultiple(AccessRegistrarIF registrar, java.util.Collection identities, IdentityIF current, int field) INTERNAL: Loads the specified object field for the given identitys from the database.
protected void	storeAdded(ObjectAccessIF oaccess, IdentityIF identity, java.util.Collection elements)
void	storeDirty(ObjectAccessIF oaccess, java.lang.Object object) INTERNAL: Stores object fields that are dirty in the database.
protected void	storeRemoved(ObjectAccessIF oaccess, IdentityIF identity, java.util.Collection elements)

Methods inherited from class java.lang.Object

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

Field Detail

debug

protected boolean debug

access

protected RDBMSAccess access

cinfo

protected ClassInfoIF cinfo

sql_load

protected java.lang.String sql_load

sql_add

protected java.lang.String sql_add

sql_remove

protected java.lang.String sql_remove

sql_delete

protected java.lang.String sql_delete

identity_field

protected FieldInfoIF identity_field

value_field

protected FieldInfoIF value_field

Constructor Detail

SQLCollectionAccess

public SQLCollectionAccess(RDBMSAccess access,
                           ClassInfoIF cinfo)

Method Detail

load

public boolean load(AccessRegistrarIF registrar,
                    IdentityIF identity)
             throws java.lang.Exception

Description copied from interface: ClassAccessIF

INTERNAL: Loads the object identity from the database.

Specified by:

load in interface ClassAccessIF

Returns:

true if object was found in the data store, false otherwise.

Throws:

java.lang.Exception

loadField

public java.lang.Object loadField(AccessRegistrarIF registrar,
                                  IdentityIF identity,
                                  int field)

Description copied from interface: ClassAccessIF

INTERNAL: Loads the specified object field for the given identity from the database.

Specified by:

loadField in interface ClassAccessIF

loadFieldMultiple

public java.lang.Object loadFieldMultiple(AccessRegistrarIF registrar,
                                          java.util.Collection identities,
                                          IdentityIF current,
                                          int field)

Description copied from interface: ClassAccessIF

INTERNAL: Loads the specified object field for the given identitys from the database.

Specified by:

loadFieldMultiple in interface ClassAccessIF

create

public void create(ObjectAccessIF oaccess,
                   java.lang.Object object)
            throws java.lang.Exception

Description copied from interface: ClassAccessIF

INTERNAL: Creates the new object in the database. Note that the object identity can be extracted from the object using the supplied object access instance.

Specified by:

create in interface ClassAccessIF

Throws:

java.lang.Exception

delete

public void delete(ObjectAccessIF oaccess,
                   java.lang.Object object)
            throws java.lang.Exception

Description copied from interface: ClassAccessIF

INTERNAL: Deletes the object identity from the database.

Specified by:

delete in interface ClassAccessIF

Throws:

java.lang.Exception

bindParametersDelete

protected void bindParametersDelete(java.sql.PreparedStatement stm,
                                    IdentityIF identity)
                             throws java.lang.Exception

Throws:

java.lang.Exception

storeDirty

public void storeDirty(ObjectAccessIF oaccess,
                       java.lang.Object object)
                throws java.lang.Exception

Description copied from interface: ClassAccessIF

INTERNAL: Stores object fields that are dirty in the database. Note that the object identity can be extracted from the object using the supplied object access instance.

Specified by:

storeDirty in interface ClassAccessIF

Throws:

java.lang.Exception

storeAdded

protected void storeAdded(ObjectAccessIF oaccess,
                          IdentityIF identity,
                          java.util.Collection elements)
                   throws java.lang.Exception

Throws:

java.lang.Exception

bindParametersAddRemove

protected void bindParametersAddRemove(java.sql.PreparedStatement stm,
                                       ObjectAccessIF oaccess,
                                       IdentityIF identity,
                                       java.lang.Object element)
                                throws java.lang.Exception

Throws:

java.lang.Exception

storeRemoved

protected void storeRemoved(ObjectAccessIF oaccess,
                            IdentityIF identity,
                            java.util.Collection elements)
                     throws java.lang.Exception

Throws:

java.lang.Exception