Class JspApplicationContextImpl

java.lang.Object
org.apache.jasper.runtime.JspApplicationContextImpl
All Implemented Interfaces:
JspApplicationContext
public class JspApplicationContextImpl extends Object implements JspApplicationContext

  • Field Details

    • map

      private static Map<javax.servlet.ServletContext, JspApplicationContextImpl> map

    • elResolvers

      private ArrayList<javax.el.ELResolver> elResolvers

    • listeners

      private ArrayList<javax.el.ELContextListener> listeners

    • context

      private javax.servlet.ServletContext context

    • expressionFactory

      private javax.el.ExpressionFactory expressionFactory

  • Constructor Details

    • JspApplicationContextImpl

      public JspApplicationContextImpl(javax.servlet.ServletContext context)

  • Method Details

    • addELResolver

      public void addELResolver(javax.el.ELResolver resolver)
      Description copied from interface: JspApplicationContext
      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:

      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.

      Specified by:
      addELResolver in interface JspApplicationContext
      Parameters:
      resolver - The new ELResolver

    • getExpressionFactory

      public javax.el.ExpressionFactory getExpressionFactory()
      Description copied from interface: JspApplicationContext
      Returns a factory used to create ValueExpressions and MethodExpressions so that EL expressions can be parsed and evaluated.
      Specified by:
      getExpressionFactory in interface JspApplicationContext
      Returns:
      A concrete implementation of the an ExpressionFactory.

    • setExpressionFactory

      public void setExpressionFactory(javax.el.ExpressionFactory expressionFactory)

    • addELContextListener

      public void addELContextListener(javax.el.ELContextListener listener)
      Description copied from interface: JspApplicationContext
      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(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.

      Specified by:
      addELContextListener in interface JspApplicationContext
      Parameters:
      listener - The listener to be notified when a new ELContext is created.

    • createELContext

      protected javax.el.ELContext createELContext(javax.el.ELResolver resolver)

    • findJspApplicationContext

      protected static JspApplicationContextImpl findJspApplicationContext(javax.servlet.ServletContext context)

    • removeJspApplicationContext

      public static void removeJspApplicationContext(javax.servlet.ServletContext context)

    • getELResolvers

      protected Iterator<javax.el.ELResolver> getELResolvers()