Class ImportHandler

java.lang.Object
javax.el.ImportHandler
public class ImportHandler extends Object
Handles imports of class names and package names. An imported package name implicitly imports all the classes in the package. A class that has been imported can be used without its package name. The name is resolved to its full (package and class) name at evaluation time.

  • Constructor Details

    • ImportHandler

      public ImportHandler()

  • Method Details

    • importStatic

      public void importStatic(String name) throws ELException
      Import a static field or method.
      Parameters:
      name - The static member name, including the full class name, to be imported
      Throws:
      ELException - if the name does not include a ".".

    • importClass

      public void importClass(String name) throws ELException
      Import a class.
      Parameters:
      name - The full class name of the class to be imported
      Throws:
      ELException - if the name does not include a ".".

    • importPackage

      public void importPackage(String packageName)
      Import all the classes in a package.
      Parameters:
      packageName - The package name to be imported

    • resolveClass

      public Class<?> resolveClass(String name)
      Resolve a class name.
      Parameters:
      name - The name of the class (without package name) to be resolved.
      Returns:
      If the class has been imported previously, with importClass(String) or importPackage(String), then its Class instance. Otherwise null.
      Throws:
      ELException - if the class is abstract or is an interface, or not public.

    • resolveStatic

      public Class<?> resolveStatic(String name)
      Resolve a static field or method name.
      Parameters:
      name - The name of the member(without package and class name) to be resolved.
      Returns:
      If the field or method has been imported previously, with importStatic(String), then the class object representing the class that declares the static field or method. Otherwise null.
      Throws:
      ELException - if the class is not public, or is abstract or is an interface.