public class ScriptEngineManager extends Object
ScriptEngineManager implements a discovery and instantiation
mechanism for ScriptEngine classes and also maintains a
collection of key/value pairs storing state shared by all engines created
by the Manager. This class uses the service provider mechanism to enumerate all the
implementations of ScriptEngineFactory. ScriptEngineManager provides a method to return a list of all these factories
as well as utility methods which look up factories on the basis of language name, file extension
and mime type.
The Bindings of key/value pairs, referred to as the "Global Scope" maintained
by the manager is available to all instances of ScriptEngine created
by the ScriptEngineManager. The values in the Bindings are
generally exposed in all scripts.
| Constructor | Description |
|---|---|
ScriptEngineManager() |
The effect of calling this constructor is the same as calling
ScriptEngineManager(Thread.currentThread().getContextClassLoader()). |
ScriptEngineManager(ClassLoader loader) |
This constructor loads the implementations of
ScriptEngineFactory visible to the given
ClassLoader using the service provider mechanism.If loader is null, the script engine factories that are
bundled with the platform and that are in the usual extension
directories (installed extensions) are loaded. |
| Modifier and Type | Method | Description |
|---|---|---|
Object |
get(String key) |
Gets the value for the specified key in the Global Scope
|
Bindings |
getBindings() |
getBindings returns the value of the globalScope field. |
ScriptEngine |
getEngineByExtension(String extension) |
Look up and create a
ScriptEngine for a given extension. |
ScriptEngine |
getEngineByMimeType(String mimeType) |
Look up and create a
ScriptEngine for a given mime type. |
ScriptEngine |
getEngineByName(String shortName) |
Looks up and creates a
ScriptEngine for a given name. |
List<ScriptEngineFactory> |
getEngineFactories() |
Returns a list whose elements are instances of all the
ScriptEngineFactory classes
found by the discovery mechanism. |
void |
put(String key,
Object value) |
Sets the specified key/value pair in the Global Scope.
|
void |
registerEngineExtension(String extension,
ScriptEngineFactory factory) |
Registers a
ScriptEngineFactory to handle an extension. |
void |
registerEngineMimeType(String type,
ScriptEngineFactory factory) |
Registers a
ScriptEngineFactory to handle a mime type. |
void |
registerEngineName(String name,
ScriptEngineFactory factory) |
Registers a
ScriptEngineFactory to handle a language
name. |
void |
setBindings(Bindings bindings) |
setBindings stores the specified Bindings
in the globalScope field. |