 | Term | Definition |
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Active Record |
An object that wraps a row in a database table or view, encapsulates the database access, and adds domain logic on that data. |
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Application Controller |
A centralized point for handling screen navigation and the flow of an application. |
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Association Table Mapping |
Saves an association as a table with foreign keys to the tables that are linked by the association. |
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Class Table Inheritance |
Represents an inheritance hierarchy of classes with one table for each class. |
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Client Session State |
Stores session state on the client. |
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Coarse-Grained Lock |
Locks a set of related objects with a single lock. |
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Concrete Table Inheritance |
Represents an inheritance hierarchy of classes with one table per concrete class in the hierarchy. |
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Data Mapper |
A layer of Mappers that moves data between objects and a database while keeping them independent of each other and the mapper itself. |
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Data Transfer Object |
An object that carries data between processes in order to reduce the number of method calls. |
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Database Session State |
Stores session data as commited data in the database. |
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Dependent Mapping |
Has one class perform the database mapping for a child class. |
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Domain Model |
An object model of the domain that incorporates both behavior and data. |
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Embedded Value |
Maps an object into several fields of another object's table. |
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Foreign Key Mapping |
Maps an association between objects to a foreign key reference between tables. |
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Front Controller |
A controller that handles all requests for a Web site. |
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Gateway |
An object that encapsulates access to an external system or resource. |
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Identity Field |
Saves the database ID field in an object to maintain identity between an in-memory object and a database row. |
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Identity Map |
Ensures that each object gets loaded only once by keeping every loaded object in a map. Looks up objects using the map when referring to them. |
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Implicit Lock |
Allows framework or layer supertype code to acquire offline locks. |
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Inheritance Mappers |
A structure to organize database mappers that handle inheritance hierarchies. |
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Layer Supertype |
A type that acts as the supertype for all types in its layer. |
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Lazy Load |
An object that doesn't contain all of the data you need but knows how to get it. |
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Mapper |
An object that sets up a communication between two independent objects. |
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Metadata Mapping |
An object that sets up a communication between two independent objects. |
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Model View Controller |
Splits user interface interaction into three distinct roles. |
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Money |
Represents a monetary value. |
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Optimistic Offline Lock |
Prevents conflicts between concurrent business transactions by detecting a conflict and rolling back the transaction. |
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Page Controller |
An object that handles a request for a specific page or action on a Web site. |
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Pessimistic Offline Lock |
Prevents conflicts between concurrent business transactions by allowing only one business transaction at a time to access data. |
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Plugin |
Links classes during configuration rather than compilation. |
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Query Object |
An object that represents a database query. |
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Record Set |
An in-memory representation of tabular data. |
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Registry |
A well-known object that other objects can use to find common objects and services. |
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Remote Facade |
Provides a coarse-grained facade on fine-grained objects to improve efficiency over a network. |
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Repository |
Mediates between the domain and data mapping layers using a collection-like interfacefor accessing domain objects. |
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Row Data Gateway |
An object that acts as a Gateway to a single record in a data source. There is one instance per row. |
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Seperated Interface |
Defines an interface in a seperate package from its implementation. |
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Serialized LOB |
Saves a graph of objects by serializing them into a single large object (LOB), which stores it in a database field. |
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Server Session State |
Keeps the session state on a server system in a serialized form. |
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Service Layer |
Defines an application's boundary with a layer of services that establishes a set of available operations and coordinates the application's response in each operation. |
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Service Stub |
Removes dependence upon problematic services during testing. |
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Single Table Inheritance |
Represents an inheritance hierarchy of classes as a single table that has columns for all the fields of the various classes. |
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Special Case |
A subclass that provides special behavior for particular cases. |
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Table Data Gateway |
An object that acts as a Gateway to a database table. One instance handles all the rows in the table. |
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Table Module |
A single instance that handles the business logic for all rows in a database table or view. |
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Template View |
Renders information into HTML by embedding markers in an HTML page. |
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Transaction Script |
Organizes business logic by procedures where each procedure handles a single request from the presentation. |
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Transform View |
A view that proceses domain data element by element and transforms it into HTML. |
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Two Step View |
Turns domain data into HTML in two steps: first by forming some kind of logical page, then rendering the logical page into HTML. |
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Unit of Work |
Maintains a list of objects affected by a business transaction and coordiantes the writing out of changes and the resolution of concurrency problems. |
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Value Object |
Asmall simple object, like money or a date range, whose equality isn't based on identity. |
