bsh
Class BlockNameSpace

java.lang.Object
  |
  +--bsh.NameSpace
        |
        +--bsh.BlockNameSpace

All Implemented Interfaces:

BshClassManager.Listener, NameSource, java.io.Serializable

class BlockNameSpace

extends NameSpace

A specialized namespace for Blocks, e.g. the body of a "for" statement. The Block acts like a child namespace but only for typed variables declared within it. Elsewhere variable assignment (including untyped variable usage) acts like it is part of the containing block.

Note: It *must* remain possible for a BlockNameSpace to be a child of another BlockNameSpace and have variable propogation pass all the way through. (This happens naturally and simply here). This is used in BSHForStatement (see notes there).

Nested Class Summary

Nested classes inherited from class bsh.NameSpace

NameSpace.TypedVariable

Nested classes inherited from class bsh.NameSource

NameSource.Listener

Field Summary

(package private) boolean

initMode When true, capture all variable assignment locally

Fields inherited from class bsh.NameSpace

callerInfoNode, JAVACODE, name, nameSourceListeners

Constructor Summary

BlockNameSpace(NameSpace parent)

Method Summary

NameSpace	getSuper() super is our parent's super
(package private) This	getThis(Interpreter declaringInterpreter) this is our parent's this
void	importClass(java.lang.String name) delegate import to our parent
void	importPackage(java.lang.String name) delegate import to our parent
void	setInitMode(boolean b) When set to true, handle all variable assignment in this local scope - don't delegate to parent.
void	setVariable(java.lang.String name, java.lang.Object o) Override the standard namespace behavior.
(package private) boolean	weHaveVar(java.lang.String name)

Methods inherited from class bsh.NameSpace

addNameSourceListener, checkAssignableFrom, classLoaderChanged, clear, doSuperImport, get, getAllNames, getAllNamesAux, getAssignableForm, getClass, getGlobal, getImportedPackages, getImportedPackages, getInvocationLine, getInvocationText, getMethod, getMethodNames, getMethods, getName, getNameResolver, getNode, getParent, getVariable, getVariable, getVariableImpl, getVariableNames, identifierToClass, invokeMethod, invokeMethod, loadDefaultImports, nameSpaceChanged, prune, setMethod, setName, setNode, setParent, setTypedVariable, toString, unwrapVariable

Methods inherited from class java.lang.Object

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

Field Detail

initMode

boolean initMode

When true, capture all variable assignment locally

Constructor Detail

BlockNameSpace

public BlockNameSpace(NameSpace parent)
               throws EvalError

Method Detail

setVariable

public void setVariable(java.lang.String name,
                        java.lang.Object o)
                 throws EvalError

Override the standard namespace behavior. If the variables exists in our namespace assign it there, otherwise in the parent space. i.e. only allow typed var declaration to happen in this namespace. Typed vars are handled in the ordinary way... local scope.

Overrides:

setVariable in class NameSpace

Parameters:

o - a value of null will remove the variable definition.

EvalError

See Also:

Primitive

setInitMode

public void setInitMode(boolean b)

When set to true, handle all variable assignment in this local scope - don't delegate to parent. This is used in catch blocks to initialize local parameters to the block then turned off to allow the normal BlockNameSpace behavior (which is to keep only locally declared typed variables local and pass the rest to the parent).

weHaveVar

boolean weHaveVar(java.lang.String name)

getSuper

public NameSpace getSuper()

super is our parent's super

Overrides:

getSuper in class NameSpace

getThis

This getThis(Interpreter declaringInterpreter)

this is our parent's this

Overrides:

getThis in class NameSpace

importClass

public void importClass(java.lang.String name)

delegate import to our parent

Overrides:

importClass in class NameSpace

importPackage

public void importPackage(java.lang.String name)

delegate import to our parent

Overrides:

importPackage in class NameSpace