BaseAttributeFilter (Apache Tomcat 9.0.111 API Documentation)
Description: declaration: package: org.apache.tomcat.util.modeler, class: BaseAttributeFilter

# Class BaseAttributeFilter

java.lang.Object
org.apache.tomcat.util.modeler.BaseAttributeFilter

All Implemented Interfaces:
  `Serializable, NotificationFilter`

public class BaseAttributeFilter extends Object implements NotificationFilter

Implementation of `NotificationFilter` for attribute change notifications. This class is used by `BaseModelMBean` to construct attribute change notification event filters when a filter is not supplied by the application.

See Also:
  - Serialized Form

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `BaseAttributeFilter(String name)`
  Construct a new filter that accepts only the specified attribute name.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addAttribute(String name)`
  Add a new attribute name to the set of names accepted by this filter.
  `void`
  `clear()`
  Clear all accepted names from this filter, so that it will accept all attribute names.
  `String[]`
  `getNames()`
  Return the set of names that are accepted by this filter.
  `boolean`
  `isNotificationEnabled(Notification notification)`
  Test whether notification enabled for this event.
  `void`
  `removeAttribute(String name)`
  Remove an attribute name from the set of names accepted by this filter.

  ### Methods inherited from class Object

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

- ## Constructor Details

  - ### BaseAttributeFilter

    public BaseAttributeFilter(String name)
    Construct a new filter that accepts only the specified attribute name.
    Parameters:
      `name` - Name of the attribute to be accepted by this filter, or `null` to accept all attribute names

- ## Method Details

  - ### addAttribute

    public void addAttribute(String name)
    Add a new attribute name to the set of names accepted by this filter.
    Parameters:
      `name` - Name of the attribute to be accepted

  - ### clear

    public void clear()
    Clear all accepted names from this filter, so that it will accept all attribute names.

  - ### getNames

    public String[] getNames()
    Return the set of names that are accepted by this filter. If this filter accepts all attribute names, a zero length array will be returned.
    Returns:
      the array of names

  - ### isNotificationEnabled

    public boolean isNotificationEnabled(Notification notification)

    Test whether notification enabled for this event. Return true if:

    - This is an attribute change notification
    - Either the set of accepted names is empty (implying that all attribute names are of interest) or the set of accepted names includes the name of the attribute in this notification
    Specified by:
      `isNotificationEnabled` in interface `NotificationFilter`

  - ### removeAttribute

    public void removeAttribute(String name)
    Remove an attribute name from the set of names accepted by this filter.
    Parameters:
      `name` - Name of the attribute to be removed