Package jakarta.el

Class ImportHandler

java.lang.Object
jakarta.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(java.lang.String) or importPackage(java.lang.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(java.lang.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.