org.apache.tapestry5.ioc.internal.util
Class GenericsUtils

java.lang.Object
  org.apache.tapestry5.ioc.internal.util.GenericsUtils

public class GenericsUtils
extends java.lang.Object

Static methods related to the use of JDK 1.5 generics.

Constructor Summary

GenericsUtils()

Method Summary

static java.lang.Class	asClass(java.lang.reflect.Type actualType)
static java.lang.reflect.Type	extractActualType(java.lang.reflect.Type owner, java.lang.reflect.Field field)
static java.lang.reflect.Type	extractActualType(java.lang.reflect.Type owner, java.lang.reflect.Method method)
static java.lang.Class	extractGenericFieldType(java.lang.Class containingClassType, java.lang.reflect.Field field) Analyzes the field in the context of a particular concrete implementation of the class to establish the generic type of a (public) field.
static java.lang.Class	extractGenericReturnType(java.lang.Class containingClassType, java.lang.reflect.Method method) Analyzes the method (often defined in a base class) in the context of a particular concrete implementation of the class to establish the generic type of a property.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericsUtils

public GenericsUtils()

Method Detail

extractGenericReturnType

public static java.lang.Class extractGenericReturnType(java.lang.Class containingClassType,
                                                       java.lang.reflect.Method method)

Analyzes the method (often defined in a base class) in the context of a particular concrete implementation of the class to establish the generic type of a property. This works when the property type is defined as a class generic parameter.

Parameters:

containingClassType - class containing the method, used to reason about generics

method - method (possibly from a base class of type) to extract

Returns:

the generic type if it may be determined, or the raw type (that is, with type erasure, most often Object)

extractGenericFieldType

public static java.lang.Class extractGenericFieldType(java.lang.Class containingClassType,
                                                      java.lang.reflect.Field field)

Analyzes the field in the context of a particular concrete implementation of the class to establish the generic type of a (public) field. This works when the field type is defined as a class generic parameter.

Parameters:

containingClassType - class containing the method, used to reason about generics

field - public field to extract type from

Returns:

the generic type if it may be determined, or the raw type (that is, with type erasure, most often

Since:

5.2.0

extractActualType

public static java.lang.reflect.Type extractActualType(java.lang.reflect.Type owner,
                                                       java.lang.reflect.Field field)

Parameters:

owner - - type that owns the field

field - - field that is generic

Returns:

Type

extractActualType

public static java.lang.reflect.Type extractActualType(java.lang.reflect.Type owner,
                                                       java.lang.reflect.Method method)

Parameters:

owner - - type that owns the field

method - - method with generic return type

Returns:

Type

asClass

public static java.lang.Class asClass(java.lang.reflect.Type actualType)