| com.db4o.config.Alias
All known Subclasses: com.db4o.config.WildcardAlias, com.db4o.config.TypeAlias,
| Alias | | public interface Alias (Code) | | Implement this interface when implementing special custom Aliases
for classes, packages or namespaces.
Aliases can be used to persist classes in the running
application to different persistent classes in a database file
or on a db4o server.
Two simple Alias implementations are supplied along with
db4o:
-
TypeAlias provides an #equals() resolver to match
names directly.
-
WildcardAlias allows simple pattern matching
with one single '*' wildcard character.
It is possible to create
own complex
Alias constructs by creating own resolvers
that implement the
Alias interface.
Four examples of concrete usecases:
// Creating an Alias for a single class
Db4o.configure().addAlias(
new TypeAlias("com.f1.Pilot", "com.f1.Driver"));
// Accessing a .NET assembly from a Java package
Db4o.configure().addAlias(
new WildcardAlias(
"Tutorial.F1.*, Tutorial",
"com.f1.*"));
// Mapping a Java package onto another
Db4o.configure().addAlias(
new WildcardAlias(
"com.f1.*",
"com.f1.client*"));
Aliases that translate the persistent name of a class to
a name that already exists as a persistent name in the database
(or on the server) are not permitted and will throw an exception
when the database file is opened.
Aliases should be configured before opening a database file
or connecting to a server.
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| resolveRuntimeName | | public String resolveRuntimeName(String runtimeTypeName)(Code) | | return the stored name for a runtime name or null if not handled.
|
| resolveStoredName | | public String resolveStoredName(String storedTypeName)(Code) | | return the runtime name for a stored name or null if not handled.
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