程序包 cn.taketoday.expression.spel.support

类 StandardTypeLocator

java.lang.Object

cn.taketoday.core.DefaultAliasRegistry

cn.taketoday.expression.spel.support.StandardTypeLocator

所有已实现的接口:

AliasRegistry, TypeLocator

public class StandardTypeLocator
extends DefaultAliasRegistry
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:

4.0

作者:

Andy Clement, Juergen Hoeller, Harry Yang

字段概要

字段

修饰符和类型	字段	说明
private final ClassLoader	classLoader
private final HashMap<String,Class<?>>	classMap
private final HashMap<String,String>	classNameMap
private final HashSet<String>	notAClass
private final ArrayList<String>	packages

从类继承的字段 cn.taketoday.core.DefaultAliasRegistry

log

构造器概要

构造器

构造器	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

修饰符和类型	方法	说明
Class<?>	findType(String typeName)	Resolve a class name.
Class<?>	getClassFor(String className)
List<String>	getImportPrefixes()	Return a list of all the import prefixes registered with this StandardTypeLocator.
void	importClass(Class<?> classToImport)	Import a class.
void	importClass(String name)	Import a class.
void	registerAlias(Class<?> classToImport, String... alias)
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.
private Class<?>	resolveClassFor(String className)

从类继承的方法 cn.taketoday.core.DefaultAliasRegistry

allowAliasOverriding, canonicalName, checkForAliasCircle, getAliases, getAliasList, hasAlias, isAlias, registerAlias, removeAlias, resolveAliases

从类继承的方法 java.lang.Object

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

字段详细资料

classLoader

@Nullable
private final ClassLoader classLoader

classMap

private final HashMap<String,Class<?>> classMap

classNameMap

private final HashMap<String,String> classNameMap

notAClass

private final HashSet<String> notAClass

packages

private final ArrayList<String> packages

构造器详细资料

StandardTypeLocator

public StandardTypeLocator()

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

Favor StandardTypeLocator(ClassLoader) over this constructor in order to provide a specific ClassLoader that is able to reliably locate user types.

另请参阅:

• ClassUtils.getDefaultClassLoader()

StandardTypeLocator

public StandardTypeLocator(@Nullable
 ClassLoader classLoader)

Create a StandardTypeLocator for the given ClassLoader.

Favor this constructor over StandardTypeLocator() in order to provide a specific ClassLoader that is able to reliably locate user types.

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

importClass

public void importClass(String name)
                 throws ExpressionException

Import a class.

参数:

name - The full class name of the class to be imported

抛出:

ExpressionException - if the name does not include a ".".

importClass

public void importClass(Class<?> classToImport)

Import a class.

另请参阅:

• ClassUtils.getSimpleName(String)

registerAlias

public void registerAlias(Class<?> classToImport,
 String... alias)

findType

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

Resolve a class name.

指定者:

findType 在接口中 TypeLocator

参数:

typeName - The name of the class (without package name) to be resolved.

返回:

If the class has been imported previously, with importClass(java.lang.String) or registerImport(String), then its Class instance. Otherwise null.

抛出:

ExpressionException - if the class is abstract or is an interface, or not public.

EvaluationException - if there is a problem finding the type

resolveClassFor

@Nullable
private Class<?> resolveClassFor(String className)

getClassFor

@Nullable
public Class<?> getClassFor(String className)