org.rapidcontext.app.plugin

Class PluginUpgradeStorage

java.lang.Object

org.rapidcontext.core.storage.StorableObject

org.rapidcontext.core.storage.Storage

org.rapidcontext.core.storage.WrappedStorage

org.rapidcontext.app.plugin.PluginUpgradeStorage

All Implemented Interfaces:

java.lang.Comparable

public class PluginUpgradeStorage
extends WrappedStorage

A storage wrapper for plug-ins. This class performs a number of optional and dynamic transformations to the data loaded from a plug-in storage. This enables newer version of the platform to load data from old plug-ins (with some caveats).

Version:

1.0

Author:

Per Cederberg

Field Summary

Fields inherited from class org.rapidcontext.core.storage.Storage

KEY_MOUNT_OVERLAY_PATH, KEY_MOUNT_OVERLAY_PRIO, KEY_MOUNT_PATH, KEY_MOUNT_TIME, KEY_READWRITE, PATH_STORAGE, PATH_STORAGE_CACHE, PATH_STORAGEINFO

Fields inherited from class org.rapidcontext.core.storage.StorableObject

dict, KEY_CLASSNAME, KEY_ID, KEY_TYPE

Constructor Summary

Constructors

Constructor and Description
PluginUpgradeStorage(Storage backend) Creates a new version 0 plug-in storage.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	load(Path path) Loads an object from the specified location.

Methods inherited from class org.rapidcontext.core.storage.WrappedStorage

destroy, lookup, remove, setMountInfo, store

Methods inherited from class org.rapidcontext.core.storage.Storage

compareTo, isReadWrite, loadAll, localPath, lookupAll, mountOverlayPath, mountOverlayPrio, mountTime, path

Methods inherited from class org.rapidcontext.core.storage.StorableObject

activate, id, init, isActive, isModified, passivate, serialize, toString, type

Methods inherited from class java.lang.Object

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

Constructor Detail

PluginUpgradeStorage

public PluginUpgradeStorage(Storage backend)

Creates a new version 0 plug-in storage.

Parameters:

backend - the storage to wrap

Method Detail

load

public java.lang.Object load(Path path)

Loads an object from the specified location. The path may locate either an index or a specific object. In case of an index, the data returned is an index dictionary listing of all objects in it.

Overrides:

load in class WrappedStorage

Parameters:

path - the storage location

Returns:

the data read, or null if not found