org.apache.commons.scxml.env
Class SimpleContext

java.lang.Object
  org.apache.commons.scxml.env.SimpleContext

All Implemented Interfaces:

Serializable, Context

Direct Known Subclasses:

ELContext, JexlContext, SessionContext

public class SimpleContext
extends Object
implements Context, Serializable

Simple Context wrapping a map of variables.

See Also:

Serialized Form

Constructor Summary

SimpleContext()
Constructor.

SimpleContext(Context parent)
Constructor.

SimpleContext(Context parent, Map initialVars)
Constructor.

SimpleContext(Map initialVars)
Constructor.

Method Summary

Object	get(String name) Get the value of this variable; delegating to parent.
protected org.apache.commons.logging.Log	getLog() Get the log used by this Context instance.
Context	getParent() Get the parent Context, may be null.
Map	getVars() Get the Map of all local variables in this Context.
boolean	has(String name) Check if this variable exists, delegating to parent.
void	reset() Clear this Context.
void	set(String name, Object value) Assigns a new value to an existing variable or creates a new one.
void	setLocal(String name, Object value) Assigns a new value to an existing variable or creates a new one.
protected void	setLog(org.apache.commons.logging.Log log) Set the log used by this Context instance.
protected void	setVars(Map vars) Set the variables map.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleContext

public SimpleContext()

Constructor.

SimpleContext

public SimpleContext(Context parent)

Constructor.

Parameters:

parent - A parent Context, can be null

SimpleContext

public SimpleContext(Map initialVars)

Constructor.

Parameters:

initialVars - A pre-populated initial variables map

SimpleContext

public SimpleContext(Context parent,
                     Map initialVars)

Constructor.

Parameters:

parent - A parent Context, can be null

initialVars - A pre-populated initial variables map

Method Detail

set

public void set(String name,
                Object value)

Assigns a new value to an existing variable or creates a new one. The method searches the chain of parent Contexts for variable existence.

Specified by:

set in interface Context

Parameters:

name - The variable name

value - The variable value

See Also:

Context.set(String, Object)

get

public Object get(String name)

Get the value of this variable; delegating to parent.

Specified by:

get in interface Context

Parameters:

name - The variable name

Returns:

Object The variable value

See Also:

Context.get(java.lang.String)

has

public boolean has(String name)

Check if this variable exists, delegating to parent.

Specified by:

has in interface Context

Parameters:

name - The variable name

Returns:

boolean true if this variable exists

See Also:

Context.has(java.lang.String)

reset

public void reset()

Clear this Context.

Specified by:

reset in interface Context

See Also:

Context.reset()

getParent

public Context getParent()

Get the parent Context, may be null.

Specified by:

getParent in interface Context

Returns:

Context The parent Context

See Also:

Context.getParent()

setLocal

public void setLocal(String name,
                     Object value)

Assigns a new value to an existing variable or creates a new one. The method allows to shaddow a variable of the same name up the Context chain.

Specified by:

setLocal in interface Context

Parameters:

name - The variable name

value - The variable value

See Also:

Context.setLocal(String, Object)

setVars

protected void setVars(Map vars)

Set the variables map.

Parameters:

vars - The new Map of variables.

getVars

public Map getVars()

Get the Map of all local variables in this Context.

Specified by:

getVars in interface Context

Returns:

Returns the vars.

See Also:

Context.getParent()

setLog

protected void setLog(org.apache.commons.logging.Log log)

Set the log used by this Context instance.

Parameters:

log - The new log.

getLog

protected org.apache.commons.logging.Log getLog()

Get the log used by this Context instance.

Returns:

Log The log being used.