org.nodal.util
Class BindingContexts

java.lang.Object
  org.nodal.util.BindingContexts

All Implemented Interfaces:

BindingContext

public class BindingContexts

extends java.lang.Object

implements BindingContext

The default implementation for BindingContext. Created on Jul 17, 2003

Author:

leei

Constructor Summary

protected

BindingContexts(BindingContext parent, java.util.Map bindings) A private constructor to ensure that all creations pass through the static constructor create().

Method Summary

java.lang.Object	bind(Name nm, java.lang.Object val) Bind a value to the given Name.
java.lang.Object	bound(Name nm) Obtain the Object bound to a particular Name.
static BindingContext	create() Create a new BindingContext with strong, synchronized binding.
static BindingContext	createWeak() Create a new BindingContext with weak, synchronized binding.
static BindingContext	embed(BindingContext parent) Create a strong BindingContext that is enclosed in a parent binding.

Methods inherited from class java.lang.Object

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

Constructor Detail

BindingContexts

protected BindingContexts(BindingContext parent,
                          java.util.Map bindings)

A private constructor to ensure that all creations pass through the static constructor create().

Method Detail

create

public static BindingContext create()

Create a new BindingContext with strong, synchronized binding.

Returns:

a new BindingContext

createWeak

public static BindingContext createWeak()

Create a new BindingContext with weak, synchronized binding.

Returns:

a new BindingContext

embed

public static BindingContext embed(BindingContext parent)

Create a strong BindingContext that is enclosed in a parent binding.

Parameters:

parent - the enclosing BindingContext

Returns:

a BindingContext that extends the enclosing context.

bound

public java.lang.Object bound(Name nm)

Description copied from interface: BindingContext

Obtain the Object bound to a particular Name.

Specified by:

bound in interface BindingContext

Parameters:

nm - the Name to use as a reference

Returns:

the Object bound if one exists, or null if not.

bind

public java.lang.Object bind(Name nm,
                             java.lang.Object val)

Description copied from interface: BindingContext

Bind a value to the given Name.

Specified by:

bind in interface BindingContext

Parameters:

nm - the Name to use for this binding

val - the Object to use as a value

Returns:

any previous binding for the Name nm