Package bsh

Class ExternalNameSpace

java.lang.Object

bsh.NameSpace

bsh.ExternalNameSpace

All Implemented Interfaces:

BshClassManager.Listener, NameSource, Serializable

public class ExternalNameSpace
extends NameSpace

A namespace which maintains an external map of values held in variables in its scope. This mechanism provides a standard collections based interface to the namespace as well as a convenient way to export and view values of the namespace without the ordinary BeanShell wrappers.

Variables are maintained internally in the normal fashion to support meta-information (such as variable type and visibility modifiers), but exported and imported in a synchronized way. Variables are exported each time they are written by BeanShell. Imported variables from the map appear in the BeanShell namespace as untyped variables with no modifiers and shadow any previously defined variables in the scope.

Note: this class is inherentely dependent on Java 1.2 (for Map), however it is not used directly by the core as other than type NameSpace, so no dependency is introduced.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface bsh.NameSource

NameSource.Listener

Field Summary

Fields inherited from class bsh.NameSpace

importedClasses, JAVACODE

Constructor Summary

Constructors

Constructor	Description
ExternalNameSpace()
ExternalNameSpace(NameSpace parent, String name, Map externalMap)

Method Summary

Modifier and Type	Method	Description
void	clear()	Clear all variables, methods, and imports from this namespace and clear all values from the external map (via Map clear()).
Variable	createVariable(String name, Class type, Object value, Modifiers mods)
Map	getMap()	Get the map view of this namespace.
protected Variable	getVariableImpl(String name, boolean recurse)	Locate a variable and return the Variable object with optional recursion through parent name spaces.
String[]	getVariableNames()	Get the names of variables defined in this namespace.
void	setMap(Map map)	Set the external Map which to which this namespace synchronizes.
void	unsetVariable(String name)	Remove the variable from the namespace.

Methods inherited from class bsh.NameSpace

addNameSourceListener, classLoaderChanged, createVariable, createVariable, doSuperImport, get, getAllNames, getAllNamesAux, getClass, getClassManager, getCommand, getDeclaredVariables, getGlobal, getImportedMethod, getImportedVar, getInvocationLine, getInvocationText, getMethod, getMethod, getMethodNames, getMethods, getName, getParent, getSuper, getThis, getVariable, getVariable, getVariableOrProperty, identifierToClass, importClass, importCommands, importObject, importPackage, importStatic, invokeMethod, invokeMethod, loadDefaultImports, nameSpaceChanged, prune, setMethod, setName, setParent, setTypedVariable, setTypedVariable, setVariable, setVariableOrProperty, toString, unwrapVariable

Methods inherited from class java.lang.Object

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

Constructor Details

ExternalNameSpace

public ExternalNameSpace()

ExternalNameSpace

public ExternalNameSpace(NameSpace parent,
 String name,
 Map externalMap)

Method Details

getMap

public Map getMap()

Get the map view of this namespace.

setMap

public void setMap(Map map)

Set the external Map which to which this namespace synchronizes. The previous external map is detached from this namespace. Previous map values are retained in the external map, but are removed from the BeanShell namespace.

unsetVariable

public void unsetVariable(String name)

Description copied from class: NameSpace

Remove the variable from the namespace.

Overrides:

unsetVariable in class NameSpace

getVariableNames

public String[] getVariableNames()

Description copied from class: NameSpace

Get the names of variables defined in this namespace. (This does not show variables in parent namespaces).

Overrides:

getVariableNames in class NameSpace

getVariableImpl

protected Variable getVariableImpl(String name,
 boolean recurse)
                            throws UtilEvalError

Description copied from class: NameSpace

Locate a variable and return the Variable object with optional recursion through parent name spaces.

If this namespace is static, return only static variables.

Overrides:

getVariableImpl in class NameSpace

Returns:

the Variable value or null if it is not defined

Throws:

UtilEvalError

createVariable

public Variable createVariable(String name,
 Class type,
 Object value,
 Modifiers mods)

Overrides:

createVariable in class NameSpace

clear

public void clear()

Clear all variables, methods, and imports from this namespace and clear all values from the external map (via Map clear()).

Overrides:

clear in class NameSpace

See Also:

• NameSpace.loadDefaultImports()