Package javax.el

Class ImportHandler

java.lang.Object

javax.el.ImportHandler

public class ImportHandler
extends java.lang.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 Summary

Constructors

Constructor	Description
ImportHandler()

Method Summary

Modifier and Type	Method	Description
void	importClass(java.lang.String name)	Import a class.
void	importPackage(java.lang.String packageName)	Import all the classes in a package.
void	importStatic(java.lang.String name)	Import a static field or method.
java.lang.Class<?>	resolveClass(java.lang.String name)	Resolve a class name.
java.lang.Class<?>	resolveStatic(java.lang.String name)	Resolve a static field or method name.

Methods inherited from class java.lang.Object

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

Constructor Detail

ImportHandler

public ImportHandler()

Method Detail

importStatic

public void importStatic(java.lang.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(java.lang.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(java.lang.String packageName)

Import all the classes in a package.

Parameters:

packageName - The package name to be imported

resolveClass

public java.lang.Class<?> resolveClass(java.lang.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 java.lang.Class<?> resolveStatic(java.lang.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.