Spring Framework

org.springframework.aop.target
Class AbstractBeanFactoryBasedTargetSource

java.lang.Object
  extended by org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
All Implemented Interfaces:
java.io.Serializable, TargetClassAware, TargetSource, Aware, BeanFactoryAware
Direct Known Subclasses:
AbstractPrototypeBasedTargetSource, LazyInitTargetSource, SimpleBeanTargetSource

public abstract class AbstractBeanFactoryBasedTargetSource
extends java.lang.Object
implements TargetSource, BeanFactoryAware, java.io.Serializable

Base class for TargetSource implementations that are based on a Spring BeanFactory, delegating to Spring-managed bean instances.

Subclasses can create prototype instances or lazily access a singleton target, for example. See LazyInitTargetSource and AbstractPrototypeBasedTargetSource's subclasses for concrete strategies.

BeanFactory-based TargetSources are serializable. This involves disconnecting the current target and turning into a SingletonTargetSource.

Since:
1.1.4
Author:
Juergen Hoeller, Rod Johnson
See Also:
BeanFactory.getBean(java.lang.String), LazyInitTargetSource, PrototypeTargetSource, ThreadLocalTargetSource, CommonsPoolTargetSource, Serialized Form

Field Summary
protected  org.apache.commons.logging.Log logger
          Logger available to subclasses
 
Constructor Summary
AbstractBeanFactoryBasedTargetSource()
           
 
Method Summary
protected  void copyFrom(AbstractBeanFactoryBasedTargetSource other)
          Copy configuration from the other AbstractBeanFactoryBasedTargetSource object.
 boolean equals(java.lang.Object other)
           
 BeanFactory getBeanFactory()
          Return the owning BeanFactory.
 java.lang.String getTargetBeanName()
          Return the name of the target bean in the factory.
 java.lang.Class<?> getTargetClass()
          Return the type of targets returned by this TargetSource.
 int hashCode()
           
 boolean isStatic()
          Will all calls to TargetSource.getTarget() return the same object?
 void releaseTarget(java.lang.Object target)
          Release the given target object obtained from the TargetSource.getTarget() method.
 void setBeanFactory(BeanFactory beanFactory)
          Set the owning BeanFactory.
 void setTargetBeanName(java.lang.String targetBeanName)
          Set the name of the target bean in the factory.
 void setTargetClass(java.lang.Class targetClass)
          Specify the target class explicitly, to avoid any kind of access to the target bean (for example, to avoid initialization of a FactoryBean instance).
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.springframework.aop.TargetSource
getTarget
 

Field Detail

logger

protected final org.apache.commons.logging.Log logger
Logger available to subclasses

Constructor Detail

AbstractBeanFactoryBasedTargetSource

public AbstractBeanFactoryBasedTargetSource()
Method Detail

setTargetBeanName

public void setTargetBeanName(java.lang.String targetBeanName)
Set the name of the target bean in the factory.

The target bean should not be a singleton, else the same instance will always be obtained from the factory, resulting in the same behavior as provided by SingletonTargetSource.

Parameters:
targetBeanName - name of the target bean in the BeanFactory that owns this interceptor
See Also:
SingletonTargetSource

getTargetBeanName

public java.lang.String getTargetBeanName()
Return the name of the target bean in the factory.


setTargetClass

public void setTargetClass(java.lang.Class targetClass)
Specify the target class explicitly, to avoid any kind of access to the target bean (for example, to avoid initialization of a FactoryBean instance).

Default is to detect the type automatically, through a getType call on the BeanFactory (or even a full getBean call as fallback).


setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)
Set the owning BeanFactory. We need to save a reference so that we can use the getBean method on every invocation.

Specified by:
setBeanFactory in interface BeanFactoryAware
Parameters:
beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.
See Also:
BeanInitializationException

getBeanFactory

public BeanFactory getBeanFactory()
Return the owning BeanFactory.


getTargetClass

public java.lang.Class<?> getTargetClass()
Description copied from interface: TargetSource
Return the type of targets returned by this TargetSource.

Can return null, although certain usages of a TargetSource might just work with a predetermined target class.

Specified by:
getTargetClass in interface TargetClassAware
Specified by:
getTargetClass in interface TargetSource
Returns:
the type of targets returned by this TargetSource

isStatic

public boolean isStatic()
Description copied from interface: TargetSource
Will all calls to TargetSource.getTarget() return the same object?

In that case, there will be no need to invoke TargetSource.releaseTarget(Object), and the AOP framework can cache the return value of TargetSource.getTarget().

Specified by:
isStatic in interface TargetSource
Returns:
true if the target is immutable
See Also:
TargetSource.getTarget()

releaseTarget

public void releaseTarget(java.lang.Object target)
                   throws java.lang.Exception
Description copied from interface: TargetSource
Release the given target object obtained from the TargetSource.getTarget() method.

Specified by:
releaseTarget in interface TargetSource
Parameters:
target - object obtained from a call to TargetSource.getTarget()
Throws:
java.lang.Exception - if the object can't be released

copyFrom

protected void copyFrom(AbstractBeanFactoryBasedTargetSource other)
Copy configuration from the other AbstractBeanFactoryBasedTargetSource object. Subclasses should override this if they wish to expose it.

Parameters:
other - object to copy configuration from

equals

public boolean equals(java.lang.Object other)
Overrides:
equals in class java.lang.Object

hashCode

public int hashCode()
Overrides:
hashCode in class java.lang.Object

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

Spring Framework