# Package helma.objectmodel.db

package helma.objectmodel.db

Related Packages
Package
Description
helma.objectmodel
helma.objectmodel.dom
Class
Description
DbColumn
A class that encapsulates the Column name and data type of a column in a relational table.
DbKey
This is the internal representation of a database key.
DbMapping
A DbMapping describes how a certain type of Nodes is to mapped to a relational database table.
DbSource
This class describes a releational data source (URL, driver, user and password).
IDGenerator
An interface for objects that generate IDs (Strings) that are unique for a specific type.
Key
This is the interface for the internal representation of an object key.
MultiKey
This is the internal representation of a database key with multiple columns.
Node
An implementation of INode that can be stored in the internal database or an external relational database.
NodeChangeListener
NodeHandle
This class is a handle or reference to a Node.
NodeManager
The NodeManager is responsible for fetching Nodes from the internal or external data sources, caching them in a least-recently-used Hashtable, and writing changes back to the databases.
ParentInfo
This class describes a parent relation between releational nodes.
Property
A property implementation for Nodes stored inside a database.
Relation
This describes how a property of a persistent Object is stored in a relational database table.
SegmentedSubnodeList
SubnodeList
Container implementation for subnode collections.
SyntheticKey
This is the internal key for an object that is not - or not directly - fetched from a db, but derived from another object.
Transactor
A subclass of thread that keeps track of changed nodes and triggers changes in the database when a transaction is commited.
WrappedNodeManager
A wrapper around NodeManager that catches most Exceptions, or rethrows them as RuntimeExceptions.