org.apache.jasper.runtime
类 JspApplicationContextImpl

java.lang.Object
  org.apache.jasper.runtime.JspApplicationContextImpl

所有已实现的接口：

JspApplicationContext

public class JspApplicationContextImpl
extends Object
implements JspApplicationContext

构造方法摘要

JspApplicationContextImpl(ServletContext context)

方法摘要

void	addELContextListener(ELContextListener listener) Registers a ELContextListeners so that context objects can be added whenever a new ELContext is created.
void	addELResolver(ELResolver resolver) Adds an ELResolver to affect the way EL variables and properties are resolved for EL expressions appearing in JSP pages and tag files.
protected ELContext	createELContext(ELResolver resolver)
protected static JspApplicationContextImpl	findJspApplicationContext(ServletContext context)
protected Iterator<ELResolver>	getELResolvers()
ExpressionFactory	getExpressionFactory() Returns a factory used to create ValueExpressions and MethodExpressions so that EL expressions can be parsed and evaluated.
static void	removeJspApplicationContext(ServletContext context)
void	setExpressionFactory(ExpressionFactory expressionFactory)

从类 java.lang.Object 继承的方法

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

构造方法详细信息

JspApplicationContextImpl

public JspApplicationContextImpl(ServletContext context)

方法详细信息

addELResolver

public void addELResolver(ELResolver resolver)

从接口 JspApplicationContext 复制的描述

Adds an ELResolver to affect the way EL variables and properties are resolved for EL expressions appearing in JSP pages and tag files.

For example, in the EL expression ${employee.lastName}, an ELResolver determines what object "employee" references and how to find its "lastName" property.

When evaluating an expression, the JSP container will consult a set of standard resolvers as well as any resolvers registered via this method. The set of resolvers are consulted in the following order:

• ImplicitObjectELResolver
• ELResolvers registered via this method, in the order in which they are registered.
• MapELResolver
• ListELResolver
• ArrayELResolver
• BeanELResolver
• ScopedAttributeELResolver

It is illegal to register an ELResolver after the application has received any request from the client. If an attempt is made to register an ELResolver after that time, an IllegalStateException is thrown.

This restriction is in place to allow the JSP container to optimize for the common case where no additional ELResolvers are in the chain, aside from the standard ones. It is permissible to add ELResolvers before or after initialization to a CompositeELResolver that is already in the chain.

It is not possible to remove an ELResolver registered with this method, once it has been registered.

指定者：

接口 JspApplicationContext 中的 addELResolver

参数：

resolver - The new ELResolver

getExpressionFactory

public ExpressionFactory getExpressionFactory()

从接口 JspApplicationContext 复制的描述

Returns a factory used to create ValueExpressions and MethodExpressions so that EL expressions can be parsed and evaluated.

指定者：

接口 JspApplicationContext 中的 getExpressionFactory

返回：

A concrete implementation of the an ExpressionFactory.

setExpressionFactory

public void setExpressionFactory(ExpressionFactory expressionFactory)

addELContextListener

public void addELContextListener(ELContextListener listener)

从接口 JspApplicationContext 复制的描述

Registers a ELContextListeners so that context objects can be added whenever a new ELContext is created.

At a minimum, the ELContext objects created will contain a reference to the JspContext for this request, which is added by the JSP container. This is sufficient for all the default ELResolvers listed in JspApplicationContext.addELResolver(javax.el.ELResolver). Note that JspContext.class is used as the key to ELContext.putContext() for the JspContext object reference.

This method is generally used by frameworks and applications that register their own ELResolver that needs context other than JspContext. The listener will typically add the necessary context to the ELContext provided in the event object. Registering a listener that adds context allows the ELResolvers in the stack to access the context they need when they do a resolution.

指定者：

接口 JspApplicationContext 中的 addELContextListener

参数：

listener - The listener to be notified when a new ELContext is created.

createELContext

protected ELContext createELContext(ELResolver resolver)

findJspApplicationContext

protected static JspApplicationContextImpl findJspApplicationContext(ServletContext context)

removeJspApplicationContext

public static void removeJspApplicationContext(ServletContext context)

getELResolvers

protected Iterator<ELResolver> getELResolvers()