org.databene.model.storage
Interface StorageSystem

All Superinterfaces:

java.io.Closeable, DescriptorProvider, java.io.Flushable

All Known Implementing Classes:

AbstractStorageSystem, DBSystem

public interface StorageSystem
extends DescriptorProvider, java.io.Closeable, java.io.Flushable

Abstraction of an Entity storage system.


Created: 27.06.2007 23:02:21

Since:

0.4.0

Author:

Volker Bergmann

Method Summary

void	close() Closes the database.
java.lang.Object	execute(java.lang.String command) Executes a command on the storage system
void	flush() Assures that all data that has been store(Entity)d, is send to the target system.
java.lang.String	getId() Returns a name that identifies the database
<T> org.databene.commons.TypedIterable<T>	query(java.lang.String selector, org.databene.commons.Context context) Creates an Iterable for repetitive iteration through the results of the specified query.
org.databene.commons.TypedIterable<Entity>	queryEntities(java.lang.String type, java.lang.String selector, org.databene.commons.Context context) Creates an iterator that provides all entities of given type.
<T> org.databene.commons.TypedIterable<T>	queryEntityIds(java.lang.String entityName, java.lang.String selector, org.databene.commons.Context context) Queries for entity ids
void	store(Entity entity) Persists a new entity.
void	update(Entity entity) Updates an existing entity.

Methods inherited from interface org.databene.model.data.DescriptorProvider

getTypeDescriptor, getTypeDescriptors

Method Detail

getId

java.lang.String getId()

Returns a name that identifies the database

Specified by:

getId in interface DescriptorProvider

queryEntities

org.databene.commons.TypedIterable<Entity> queryEntities(java.lang.String type,
                                                         java.lang.String selector,
                                                         org.databene.commons.Context context)

Creates an iterator that provides all entities of given type.

queryEntityIds

<T> org.databene.commons.TypedIterable<T> queryEntityIds(java.lang.String entityName,
                                                         java.lang.String selector,
                                                         org.databene.commons.Context context)

Queries for entity ids

query

<T> org.databene.commons.TypedIterable<T> query(java.lang.String selector,
                                                org.databene.commons.Context context)

Creates an Iterable for repetitive iteration through the results of the specified query.

store

void store(Entity entity)

Persists a new entity.

update

void update(Entity entity)

Updates an existing entity.

execute

java.lang.Object execute(java.lang.String command)

Executes a command on the storage system

flush

void flush()

Assures that all data that has been store(Entity)d, is send to the target system.

Specified by:

flush in interface java.io.Flushable

close

void close()

Closes the database.

Specified by:

close in interface java.io.Closeable