org.springframework.expression.spel.support

类 StandardTypeLocator

java.lang.Object

org.springframework.expression.spel.support.StandardTypeLocator

所有已实现的接口:

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.

从以下版本开始:

3.0

作者:

Andy Clement, Juergen Hoeller

构造器概要

构造器

构造器和说明
StandardTypeLocator() Create a StandardTypeLocator for the default ClassLoader (typically, the thread context ClassLoader).
StandardTypeLocator(ClassLoader classLoader) Create a StandardTypeLocator for the given ClassLoader.

方法概要

限定符和类型	方法和说明
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.

从类继承的方法 java.lang.Object

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

构造器详细资料

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.

参数:

classLoader - the ClassLoader to delegate to

方法详细资料

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".

参数:

prefix - the prefix to register

removeImport

public void removeImport(String prefix)

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

参数:

prefix - the prefix to remove

getImportPrefixes

public List<String> getImportPrefixes()

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

返回:

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.

指定者:

findType 在接口中 TypeLocator

参数:

typeName - the type to locate

返回:

the class object for the type

抛出:

EvaluationException - if the type cannot be found