The Spring Framework

## org.springframework.aop.target
Class SingletonTargetSource

    java.lang.Object
      org.springframework.aop.target.SingletonTargetSource

All Implemented Interfaces:
  Serializable, TargetClassAware, TargetSource

    public class SingletonTargetSource

extends Object
implements TargetSource, Serializable

Implementation of the `TargetSource` interface that holds a given object. This is the default implementation of the TargetSource interface, as used by the Spring AOP framework. There is usually no need to create objects of this class in application code.

This class is serializable. However, the actual serializability of a SingletonTargetSource will depend on whether the target is serializable.

Author:
  Rod Johnson, Juergen Hoeller
See Also:
  `AdvisedSupport.setTarget(Object)`, Serialized Form

Constructor Summary
`SingletonTargetSource(Object target)` Create a new SingletonTargetSource for the given target.

Method Summary
`boolean` `equals(Object other)` Two invoker interceptors are equal if they have the same target or if the targets or the targets are equal.
`Object` `getTarget()` Return a target instance.
`Class` `getTargetClass()` Return the type of targets returned by this `TargetSource`.
`int` `hashCode()` SingletonTargetSource uses the hash code of the target object.
`boolean` `isStatic()` Will all calls to `TargetSource.getTarget()` return the same object?
`void` `releaseTarget(Object target)` Release the given target object obtained from the `TargetSource.getTarget()` method.
`String` `toString()`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Constructor Detail

### SingletonTargetSource

    public SingletonTargetSource(Object target)

  Create a new SingletonTargetSource for the given target.

  Parameters:
    `target` - the target object

Method Detail

### getTargetClass

    public 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`

### getTarget

    public Object getTarget()

  Description copied from interface: `TargetSource`
  Return a target instance. Invoked immediately before the AOP framework calls the "target" of an AOP method invocation.

  Specified by:
    `getTarget` in interface `TargetSource`
  Returns:
    the target object, which contains the joinpoint

### releaseTarget

    public void releaseTarget(Object target)

  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()`

### 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()`

### equals

    public boolean equals(Object other)

  Two invoker interceptors are equal if they have the same target or if the targets or the targets are equal.

  Overrides:
    `equals` in class `Object`

### hashCode

    public int hashCode()

  SingletonTargetSource uses the hash code of the target object.

  Overrides:
    `hashCode` in class `Object`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

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