程序包 cn.taketoday.web.handler

类 SelectableReturnValueHandler

java.lang.Object

cn.taketoday.web.handler.SelectableReturnValueHandler

所有已实现的接口:

cn.taketoday.core.ArraySizeTrimmer, ReturnValueHandler

public class SelectableReturnValueHandler
extends Object
implements ReturnValueHandler, cn.taketoday.core.ArraySizeTrimmer

select ReturnValueHandler handler in list

从以下版本开始:

4.0

作者:

TODAY 2021/9/3 23:09

字段概要

字段

修饰符和类型	字段	说明
private final List<ReturnValueHandler>	internalHandlers

从接口继承的字段 cn.taketoday.web.ReturnValueHandler

NONE_RETURN_VALUE

构造器概要

构造器

构造器	说明
SelectableReturnValueHandler(List<ReturnValueHandler> internalHandlers)

方法概要

修饰符和类型	方法	说明
List<ReturnValueHandler>	getInternalHandlers()
void	handleReturnValue(RequestContext context, Object handler, Object returnValue)	Handle result of the handler
final ReturnValueHandler	handleSelectively(RequestContext context, Object handler, Object returnValue)	select a handler and handle return-value with selected handler
final ReturnValueHandler	selectHandler(Object handler, Object returnValue)
boolean	supportsHandler(Object handler)	If this ReturnValueHandler supports the target handler
boolean	supportsReturnValue(Object returnValue)	If this ReturnValueHandler supports the target handler's result
void	trimToSize()

从类继承的方法 java.lang.Object

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

字段详细资料

internalHandlers

private final List<ReturnValueHandler> internalHandlers

构造器详细资料

SelectableReturnValueHandler

public SelectableReturnValueHandler(List<ReturnValueHandler> internalHandlers)

方法详细资料

supportsHandler

public boolean supportsHandler(Object handler)

从接口复制的说明: ReturnValueHandler

If this ReturnValueHandler supports the target handler

This method can test this ReturnValueHandler supports the target handler in application startup time , static match

指定者:

supportsHandler 在接口中 ReturnValueHandler

参数:

handler - Target HTTP handler

返回:

If this ReturnValueHandler supports the target handler

supportsReturnValue

public boolean supportsReturnValue(@Nullable
 Object returnValue)

从接口复制的说明: ReturnValueHandler

If this ReturnValueHandler supports the target handler's result

This method can test this ReturnValueHandler supports the target handler in application runtime

指定者:

supportsReturnValue 在接口中 ReturnValueHandler

参数:

returnValue - Target handler's return-value or result

返回:

If this ReturnValueHandler supports the target handler's result

selectHandler

@Nullable
public final ReturnValueHandler selectHandler(@Nullable
 Object handler,
 @Nullable
 Object returnValue)

参数:

returnValue - if returnValue is ReturnValueHandler.NONE_RETURN_VALUE match handler only

返回:

null if returnValue is ReturnValueHandler.NONE_RETURN_VALUE or no one matched

handleReturnValue

public void handleReturnValue(RequestContext context,
 @Nullable
 Object handler,
 @Nullable
 Object returnValue)
                       throws Exception

从接口复制的说明: ReturnValueHandler

Handle result of the handler

指定者:

handleReturnValue 在接口中 ReturnValueHandler

参数:

context - Current HTTP request context

handler - Target HTTP handler

returnValue - Handler execution result

抛出:

ReturnValueHandlerNotFoundException - not found ReturnValueHandler

Exception - throws when write data to response

handleSelectively

@Nullable
public final ReturnValueHandler handleSelectively(RequestContext context,
 @Nullable
 Object handler,
 @Nullable
 Object returnValue)
                                           throws Exception

select a handler and handle return-value with selected handler

参数:

context - current request context

handler - web request handler

returnValue - handler execution result

返回:

selected handler or which handler handled this result(return-value)

抛出:

IOException - throws when write data to response

Exception

getInternalHandlers

public List<ReturnValueHandler> getInternalHandlers()

trimToSize

public void trimToSize()

指定者:

trimToSize 在接口中 cn.taketoday.core.ArraySizeTrimmer