Package jakarta.servlet.jsp

# Interface JspApplicationContext

public interface JspApplicationContext

Stores application-scoped information for the JSP container.

Since:
  JSP 2.1

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addELContextListener(jakarta.el.ELContextListener listener)`
  Registers an `ELContextListener` that will be notified whenever a new `ELContext` is created.
  `void`
  `addELResolver(jakarta.el.ELResolver resolver)`
  Adds an `ELResolver` to the chain of EL variable and property management within JSP pages and Tag files.
  `jakarta.el.ExpressionFactory`
  `getExpressionFactory()`
  Returns the JSP container's `ExpressionFactory` implementation for EL use.

- ## Method Details

  - ### addELContextListener

    void addELContextListener(jakarta.el.ELContextListener listener)
    Registers an `ELContextListener` that will be notified whenever a new `ELContext` is created.

    At the very least, any `ELContext` instantiated will have reference to the `JspContext` under `JspContext.class`.

    Parameters:
      `listener` - The listener to add

  - ### addELResolver

    void addELResolver(jakarta.el.ELResolver resolver)

    Adds an `ELResolver` to the chain of EL variable and property management within JSP pages and Tag files.

    JSP has a default set of ELResolvers to chain for all EL evaluation:

    - `ImplicitObjectELResolver`
    - `ELResolver` instances registered with this method
    - `MapELResolver`
    - `ListELResolver`
    - `ArrayELResolver`
    - `BeanELResolver`
    - `ScopedAttributeELResolver`
    Parameters:
      `resolver` - an additional resolver
    Throws:
      `IllegalStateException` - if called after the application's `ServletContextListeners` have been initialized.

  - ### getExpressionFactory

    jakarta.el.ExpressionFactory getExpressionFactory()

    Returns the JSP container's `ExpressionFactory` implementation for EL use.

    Returns:
      an `ExpressionFactory` implementation