Module jEdit

Package org.gjt.sp.jedit.bsh

Class ExternalNameSpace

java.lang.Object

org.gjt.sp.jedit.bsh.NameSpace

org.gjt.sp.jedit.bsh.ExternalNameSpace

All Implemented Interfaces:

Serializable, BshClassManager.Listener, NameSource

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, 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 org.gjt.sp.jedit.bsh.NameSource

NameSource.Listener

Field Summary

Fields inherited from class org.gjt.sp.jedit.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()).
protected void	getAllNamesAux(Vector vec)	Helper for implementing NameSource
Variable[]	getDeclaredVariables()
Map	getMap()	Get the map view of this namespace.
BshMethod	getMethod(String name, Class[] sig, boolean declaredOnly)	Get the bsh method matching the specified signature declared in this name space or a parent.
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.
protected void	putExternalMap(String name, Object value)	Place an unwrapped value in the external map.
void	setMap(Map map)	Set the external Map which to which this namespace synchronizes.
void	setMethod(String name, BshMethod method)	Note: this is primarily for internal use.
void	setTypedVariable(String name, Class type, Object value, Modifiers modifiers)	Declare a variable in the local scope and set its initial value.
void	unsetVariable(String name)	Remove the variable from the namespace.

Methods inherited from class org.gjt.sp.jedit.bsh.NameSpace

addCommandPath, addNameSourceListener, classLoaderChanged, doSuperImport, get, getAllNames, getClass, getClassManager, getCommand, getCommand, getGlobal, getImportedMethod, getImportedVar, getInvocationLine, getInvocationText, getMethod, getMethodNames, getMethods, getName, getParent, getSuper, getVariable, getVariable, identifierToClass, importClass, importCommands, importObject, importPackage, importStatic, invokeMethod, invokeMethod, loadDefaultImports, nameSpaceChanged, prune, removeCommandPath, setName, setParent, setTypedVariable, setVariable, setVariable, 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

getDeclaredVariables

public Variable[] getDeclaredVariables()

Overrides:

getDeclaredVariables in class NameSpace

setTypedVariable

public void setTypedVariable(String name,
 Class type,
 Object value,
 Modifiers modifiers)
                      throws UtilEvalError

Description copied from class: NameSpace

Declare a variable in the local scope and set its initial value. Value may be null to indicate that we would like the default value for the variable type. (e.g. 0 for integer types, null for object types). An existing typed variable may only be set to the same type. If an untyped variable of the same name exists it will be overridden with the new typed var. The set will perform a Types.getAssignableForm() on the value if necessary.

Note: this method is primarily intended for use internally. If you use this method outside of the bsh package and wish to set variables with primitive values you will have to wrap them using bsh.Primitive.

Overrides:

setTypedVariable in class NameSpace

Parameters:

value - If value is null, you'll get the default value for the type

modifiers - may be null

Throws:

UtilEvalError

See Also:

• Primitive

setMethod

public void setMethod(String name,
 BshMethod method)
               throws UtilEvalError

Description copied from class: NameSpace

Note: this is primarily for internal use.

Overrides:

setMethod in class NameSpace

Throws:

UtilEvalError

See Also:

• Interpreter.source(String)
• Interpreter.eval(String)

getMethod

public BshMethod getMethod(String name,
 Class[] sig,
 boolean declaredOnly)
                    throws UtilEvalError

Description copied from class: NameSpace

Get the bsh method matching the specified signature declared in this name space or a parent.

Note: this method is primarily intended for use internally. If you use this method outside of the bsh package you will have to be familiar with BeanShell's use of the Primitive wrapper class.

Overrides:

getMethod in class NameSpace

Parameters:

declaredOnly - if true then only methods declared directly in this namespace will be found and no inherited or imported methods will be visible.

Returns:

the BshMethod or null if not found

Throws:

UtilEvalError

See Also:

• Primitive

getAllNamesAux

protected void getAllNamesAux(Vector vec)

Description copied from class: NameSpace

Helper for implementing NameSource

Overrides:

getAllNamesAux 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()

putExternalMap

protected void putExternalMap(String name,
 Object value)

Place an unwrapped value in the external map. BeanShell primitive types are represented by their object wrappers, so it is not possible to differentiate between wrapper types and primitive types via the external Map.