org.springframework.beans.factory.support

Class AutowireUtils

java.lang.Object

org.springframework.beans.factory.support.AutowireUtils

abstract class AutowireUtils
extends java.lang.Object

Utility class that contains various methods useful for the implementation of autowire-capable bean factories.

Since:

1.1.2

Author:

Juergen Hoeller, Mark Fisher, Sam Brannen

See Also:

AbstractAutowireCapableBeanFactory

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	AutowireUtils.ObjectFactoryDelegatingInvocationHandler Reflective InvocationHandler for lazy access to the current target object.

Constructor Summary

Constructors

Constructor and Description
AutowireUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	isExcludedFromDependencyCheck(java.beans.PropertyDescriptor pd) Determine whether the given bean property is excluded from dependency checks.
static boolean	isSetterDefinedInInterface(java.beans.PropertyDescriptor pd, java.util.Set<java.lang.Class<?>> interfaces) Return whether the setter method of the given bean property is defined in any of the given interfaces.
static java.lang.Object	resolveAutowiringValue(java.lang.Object autowiringValue, java.lang.Class<?> requiredType) Resolve the given autowiring value against the given required type, e.g.
static java.lang.Class<?>	resolveReturnTypeForFactoryMethod(java.lang.reflect.Method method, java.lang.Object[] args, java.lang.ClassLoader classLoader) Determine the target type for the generic return type of the given generic factory method, where formal type variables are declared on the given method itself.
static void	sortConstructors(java.lang.reflect.Constructor<?>[] constructors) Sort the given constructors, preferring public constructors and "greedy" ones with a maximum number of arguments.
static void	sortFactoryMethods(java.lang.reflect.Method[] factoryMethods) Sort the given factory methods, preferring public methods and "greedy" ones with a maximum of arguments.

Methods inherited from class java.lang.Object

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

Constructor Detail

AutowireUtils

AutowireUtils()

Method Detail

sortConstructors

public static void sortConstructors(java.lang.reflect.Constructor<?>[] constructors)

Sort the given constructors, preferring public constructors and "greedy" ones with a maximum number of arguments. The result will contain public constructors first, with decreasing number of arguments, then non-public constructors, again with decreasing number of arguments.

Parameters:

constructors - the constructor array to sort

sortFactoryMethods

public static void sortFactoryMethods(java.lang.reflect.Method[] factoryMethods)

Sort the given factory methods, preferring public methods and "greedy" ones with a maximum of arguments. The result will contain public methods first, with decreasing number of arguments, then non-public methods, again with decreasing number of arguments.

Parameters:

factoryMethods - the factory method array to sort

isExcludedFromDependencyCheck

public static boolean isExcludedFromDependencyCheck(java.beans.PropertyDescriptor pd)

Determine whether the given bean property is excluded from dependency checks.

This implementation excludes properties defined by CGLIB.

Parameters:

pd - the PropertyDescriptor of the bean property

Returns:

whether the bean property is excluded

isSetterDefinedInInterface

public static boolean isSetterDefinedInInterface(java.beans.PropertyDescriptor pd,
                                                 java.util.Set<java.lang.Class<?>> interfaces)

Return whether the setter method of the given bean property is defined in any of the given interfaces.

Parameters:

pd - the PropertyDescriptor of the bean property

interfaces - the Set of interfaces (Class objects)

Returns:

whether the setter method is defined by an interface

resolveAutowiringValue

public static java.lang.Object resolveAutowiringValue(java.lang.Object autowiringValue,
                                                      java.lang.Class<?> requiredType)

Resolve the given autowiring value against the given required type, e.g. an ObjectFactory value to its actual object result.

Parameters:

autowiringValue - the value to resolve

requiredType - the type to assign the result to

Returns:

the resolved value

resolveReturnTypeForFactoryMethod

public static java.lang.Class<?> resolveReturnTypeForFactoryMethod(java.lang.reflect.Method method,
                                                                   java.lang.Object[] args,
                                                                   java.lang.ClassLoader classLoader)

Determine the target type for the generic return type of the given generic factory method, where formal type variables are declared on the given method itself.

For example, given a factory method with the following signature, if resolveReturnTypeForFactoryMethod() is invoked with the reflected method for creatProxy() and an Object[] array containing MyService.class, resolveReturnTypeForFactoryMethod() will infer that the target return type is MyService.

public static <T> T createProxy(Class<T> clazz)

Possible Return Values

• the target return type, if it can be inferred
• the standard return type, if the given method does not declare any formal type variables
• the standard return type, if the target return type cannot be inferred (e.g., due to type erasure)
• null, if the length of the given arguments array is shorter than the length of the formal argument list for the given method

Parameters:

method - the method to introspect (never null)

args - the arguments that will be supplied to the method when it is invoked (never null)

classLoader - the ClassLoader to resolve class names against, if necessary (never null)

Returns:

the resolved target return type, the standard return type, or null

Since:

3.2.5