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org.scopemvc.controller.basic
Class ViewContext  

java.lang.Object
  org.scopemvc.controller.basic.ViewContext

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public abstract class ViewContext

extends java.lang.Object

ViewContext handles show/hide of views, errors and has some concept of the application's context. eg a Swing implementation would show views inside JFrames or JDialogs and show errors using JOptionPanes. A servlet implementation would know about the HTTP response and push views into its stream.

There's a place in here to store properties per context. This is used in the servlet implementation to maintain state over a single request.

Several static methods are used to set the context for an application either on a global basis (eg Swing) or per-thread (eg servlet): see getViewContext() 55 etc.

Version:

$Revision: 1.5 $ $Date: 2002/01/26 09:46:20 $

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Field Summary
private static ViewContext	globalContext
private static org.apache.commons.logging.Log	LOG
protected  java.util.Map	properties
private static java.util.Map	threadContexts

 

Constructor Summary

ViewContext()

 

Method Summary
void	addProperty(java.lang.String inKey, java.lang.Object inObject)           Store an arbitrary object under a known key.
void	clearProperties()           Clear all properties from this context.
static void	clearThreadContext()           Clear the ViewContext for the current thread.
abstract  void	exit()
java.lang.Object	getProperty(java.lang.String inKey)           Fetch an arbitrary object under a known key.
static ViewContext	getViewContext()           Return the current ViewContext.
abstract  void	hideView(org.scopemvc.core.View inView)
java.lang.Object	removeProperty(java.lang.String inKey)           Fetch and remove an arbitrary object under a known key.
static void	setGlobalContext(ViewContext inContext)           Set the global ViewContext, clearing any per-thread contexts.
static void	setThreadContext(ViewContext inContext)           Set a ViewContext for the current thread and clear any global ViewContext that may exist.
abstract  void	showError(java.lang.String inErrorTitle, java.lang.String inErrorMessage)
abstract  void	showView(org.scopemvc.core.View inView)
abstract  void	startProgress()
abstract  void	stopProgress()

 

Methods inherited from class java.lang.Object

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

 

Field Detail

LOG

private static final org.apache.commons.logging.Log LOG

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properties

protected java.util.Map properties

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globalContext

private static ViewContext globalContext

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threadContexts

private static java.util.Map threadContexts

Constructor Detail

ViewContext

public ViewContext()

Method Detail

showView

public abstract void showView(org.scopemvc.core.View inView)

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hideView

public abstract void hideView(org.scopemvc.core.View inView)

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showError

public abstract void showError(java.lang.String inErrorTitle,
                               java.lang.String inErrorMessage)

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exit

public abstract void exit()

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startProgress

public abstract void startProgress()

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stopProgress

public abstract void stopProgress()

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addProperty

public void addProperty(java.lang.String inKey,
                        java.lang.Object inObject)

Store an arbitrary object under a known key.

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getProperty

public java.lang.Object getProperty(java.lang.String inKey)

Fetch an arbitrary object under a known key.

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removeProperty

public java.lang.Object removeProperty(java.lang.String inKey)

Fetch and remove an arbitrary object under a known key.

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clearProperties

public void clearProperties()

Clear all properties from this context.

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getViewContext

public static ViewContext getViewContext()

Return the current ViewContext. First try the per-thread context and if none, return the global context. May return null if no context set.

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setGlobalContext

public static void setGlobalContext(ViewContext inContext)

Set the global ViewContext, clearing any per-thread contexts.

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setThreadContext

public static void setThreadContext(ViewContext inContext)

Set a ViewContext for the current thread and clear any global ViewContext that may exist.

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clearThreadContext

public static void clearThreadContext()

Clear the ViewContext for the current thread.

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Home >> All >> org >> scopemvc >> controller >> [ basic overview ]	PREV CLASS  NEXT CLASS
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