org.springframework.expression.spel.support

Class StandardTypeLocator

java.lang.Object

org.springframework.expression.spel.support.StandardTypeLocator

All Implemented Interfaces:

TypeLocator

public class StandardTypeLocator
extends Object
implements TypeLocator

A simple implementation of TypeLocator that uses the context ClassLoader (or any ClassLoader set upon it). It supports 'well-known' packages: So if a type cannot be found, it will try the registered imports to locate it.

Since:

3.0

Author:

Andy Clement, Juergen Hoeller

Constructor Summary

Constructors

Constructor and Description
StandardTypeLocator() Create a StandardTypeLocator for the default ClassLoader (typically, the thread context ClassLoader).
StandardTypeLocator(ClassLoader classLoader) Create a StandardTypeLocator for the given ClassLoader.

Method Summary

Modifier and Type	Method and Description
Class<?>	findType(String typeName) Find a (possibly unqualified) type reference - first using the type name as-is, then trying any registered prefixes if the type name cannot be found.
List<String>	getImportPrefixes() Return a list of all the import prefixes registered with this StandardTypeLocator.
void	registerImport(String prefix) Register a new import prefix that will be used when searching for unqualified types.
void	removeImport(String prefix) Remove that specified prefix from this locator's list of imports.

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardTypeLocator

public StandardTypeLocator()

Create a StandardTypeLocator for the default ClassLoader (typically, the thread context ClassLoader).

StandardTypeLocator

public StandardTypeLocator(@Nullable
                           ClassLoader classLoader)

Create a StandardTypeLocator for the given ClassLoader.

Parameters:

classLoader - the ClassLoader to delegate to

Method Detail

registerImport

public void registerImport(String prefix)

Register a new import prefix that will be used when searching for unqualified types. Expected format is something like "java.lang".

Parameters:

prefix - the prefix to register

removeImport

public void removeImport(String prefix)

Remove that specified prefix from this locator's list of imports.

Parameters:

prefix - the prefix to remove

getImportPrefixes

public List<String> getImportPrefixes()

Return a list of all the import prefixes registered with this StandardTypeLocator.

Returns:

a list of registered import prefixes

findType

public Class<?> findType(String typeName)
                  throws EvaluationException

Find a (possibly unqualified) type reference - first using the type name as-is, then trying any registered prefixes if the type name cannot be found.

Specified by:

findType in interface TypeLocator

Parameters:

typeName - the type to locate

Returns:

the class object for the type

Throws:

EvaluationException - if the type cannot be found