当前页面: 在线文档首页 > Spring Framework 2.1.0 API 文档英文版

GenericCollectionTypeResolver (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		The Spring Framework
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

org.springframework.core
Class GenericCollectionTypeResolver

java.lang.Object
  org.springframework.core.GenericCollectionTypeResolver

---

public abstract class GenericCollectionTypeResolver
extends Object

Helper class for determining element types of collections and maps.

Mainly intended for usage within the framework, determining the target type of values to be added to a collection or map (to be able to attempt type conversion if appropriate).

Only usable on Java 5. Use an appropriate JdkVersion check before calling this class, if a fallback for JDK 1.4 is desirable.

Since:

2.0

Author:

Juergen Hoeller

See Also:

BeanWrapperImpl, JdkVersion

---

Constructor Summary
GenericCollectionTypeResolver()

 

Method Summary
static Class	getCollectionParameterType(MethodParameter methodParam)           Determine the generic element type of the given Collection parameter.
static Class	getCollectionReturnType(Method method)           Determine the generic element type of the given Collection return type.
static Class	getCollectionReturnType(Method method, int nestingLevel)           Determine the generic element type of the given Collection return type.
static Class	getCollectionType(Class collectionClass)           Determine the generic element type of the given Collection class (if it declares one through a generic superclass or generic interface).
static Class	getMapKeyParameterType(MethodParameter methodParam)           Determine the generic key type of the given Map parameter.
static Class	getMapKeyReturnType(Method method)           Determine the generic key type of the given Map parameter.
static Class	getMapKeyReturnType(Method method, int nestingLevel)           Determine the generic key type of the given Map parameter.
static Class	getMapKeyType(Class mapClass)           Determine the generic key type of the given Map class (if it declares one through a generic superclass or generic interface).
static Class	getMapValueParameterType(MethodParameter methodParam)           Determine the generic value type of the given Map parameter.
static Class	getMapValueReturnType(Method method)           Determine the generic value type of the given Map parameter.
static Class	getMapValueReturnType(Method method, int nestingLevel)           Determine the generic value type of the given Map parameter.
static Class	getMapValueType(Class mapClass)           Determine the generic value type of the given Map class (if it declares one through a generic superclass or generic interface).

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

GenericCollectionTypeResolver

public GenericCollectionTypeResolver()

Method Detail

getCollectionType

public static Class getCollectionType(Class collectionClass)

Determine the generic element type of the given Collection class (if it declares one through a generic superclass or generic interface).

Parameters:

collectionClass - the collection class to introspect

Returns:

the generic type, or null if none

---

getMapKeyType

public static Class getMapKeyType(Class mapClass)

Determine the generic key type of the given Map class (if it declares one through a generic superclass or generic interface).

Parameters:

mapClass - the map class to introspect

Returns:

the generic type, or null if none

---

getMapValueType

public static Class getMapValueType(Class mapClass)

Determine the generic value type of the given Map class (if it declares one through a generic superclass or generic interface).

Parameters:

mapClass - the map class to introspect

Returns:

the generic type, or null if none

---

getCollectionParameterType

public static Class getCollectionParameterType(MethodParameter methodParam)

Determine the generic element type of the given Collection parameter.

Parameters:

methodParam - the method parameter specification

Returns:

the generic type, or null if none

---

getMapKeyParameterType

public static Class getMapKeyParameterType(MethodParameter methodParam)

Determine the generic key type of the given Map parameter.

Parameters:

methodParam - the method parameter specification

Returns:

the generic type, or null if none

---

getMapValueParameterType

public static Class getMapValueParameterType(MethodParameter methodParam)

Determine the generic value type of the given Map parameter.

Parameters:

methodParam - the method parameter specification

Returns:

the generic type, or null if none

---

getCollectionReturnType

public static Class getCollectionReturnType(Method method)

Determine the generic element type of the given Collection return type.

Parameters:

method - the method to check the return type for

Returns:

the generic type, or null if none

---

getCollectionReturnType

public static Class getCollectionReturnType(Method method,
                                            int nestingLevel)

Determine the generic element type of the given Collection return type.

If the specified nesting level is higher than 1, the element type of a nested Collection/Map will be analyzed.

Parameters:

method - the method to check the return type for

nestingLevel - the nesting level of the target type (typically 1; e.g. in case of a List of Lists, 1 would indicate the nested List, whereas 2 would indicate the element of the nested List)

Returns:

the generic type, or null if none

---

getMapKeyReturnType

public static Class getMapKeyReturnType(Method method)

Determine the generic key type of the given Map parameter.

Parameters:

method - the method to check the return type for

Returns:

the generic type, or null if none

---

getMapKeyReturnType

public static Class getMapKeyReturnType(Method method,
                                        int nestingLevel)

Determine the generic key type of the given Map parameter.

Parameters:

method - the method to check the return type for

nestingLevel - the nesting level of the target type (typically 1; e.g. in case of a List of Lists, 1 would indicate the nested List, whereas 2 would indicate the element of the nested List)

Returns:

the generic type, or null if none

---

getMapValueReturnType

public static Class getMapValueReturnType(Method method)

Determine the generic value type of the given Map parameter.

Parameters:

method - the method to check the return type for

Returns:

the generic type, or null if none

---

getMapValueReturnType

public static Class getMapValueReturnType(Method method,
                                          int nestingLevel)

Determine the generic value type of the given Map parameter.

Parameters:

method - the method to check the return type for

nestingLevel - the nesting level of the target type (typically 1; e.g. in case of a List of Lists, 1 would indicate the nested List, whereas 2 would indicate the element of the nested List)

Returns:

the generic type, or null if none

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		The Spring Framework
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

Copyright © 2002-2007 The Spring Framework.