org.springframework.aop.support

## Class AbstractExpressionPointcut

- java.lang.Object
- - org.springframework.aop.support.AbstractExpressionPointcut

- All Implemented Interfaces:
    Serializable, Pointcut, ExpressionPointcut
  Direct Known Subclasses:
    AspectJExpressionPointcut

      public abstract class AbstractExpressionPointcut
      extends Object
      implements ExpressionPointcut, Serializable

  Abstract superclass for expression pointcuts, offering location and expression properties.
  Since:
    2.0
  Author:
    Rod Johnson, Rob Harrop
  See Also:
    `setLocation(java.lang.String)`, `setExpression(java.lang.String)`, Serialized Form

- - ### Field Summary

    - ### Fields inherited from interface org.springframework.aop.Pointcut

      `TRUE`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractExpressionPointcut()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `getExpression()` Return this pointcut's expression.
    `String` | `getLocation()` Return location information about the pointcut expression if available.
    `protected void` | `onSetExpression(String expression)` Called when a new pointcut expression is set.
    `void` | `setExpression(String expression)`
    `void` | `setLocation(String location)` Set the location for debugging.

    - ### Methods inherited from class java.lang.Object

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

    - ### Methods inherited from interface org.springframework.aop.Pointcut

      `getClassFilter, getMethodMatcher`

- - ### Constructor Detail

    - #### AbstractExpressionPointcut

          public AbstractExpressionPointcut()

  - ### Method Detail

    - #### setLocation

          public void setLocation(String location)

      Set the location for debugging.

    - #### getLocation

          public String getLocation()

      Return location information about the pointcut expression if available. This is useful in debugging.
      Returns:
        location information as a human-readable String, or `null` if none is available

    - #### setExpression

          public void setExpression(String expression)

    - #### onSetExpression

          protected void onSetExpression(String expression)
                                  throws IllegalArgumentException

      Called when a new pointcut expression is set. The expression should be parsed at this point if possible.

      This implementation is empty.

      Parameters:
        `expression` - expression to set
      Throws:
        `IllegalArgumentException` - if the expression is invalid
      See Also:
        `setExpression(java.lang.String)`

    - #### getExpression

          public String getExpression()

      Return this pointcut's expression.
      Specified by:
        `getExpression` in interface `ExpressionPointcut`