alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Other links

The source code

/*
 * Copyright (C) The Apache Software Foundation. All rights reserved.
 *
 * This software is published under the terms of the Apache Software
 * License version 1.1, a copy of which has been included with this
 * distribution in the LICENSE.txt file.
 */
package org.apache.log4j.lf5.viewer.categoryexplorer;

import org.apache.log4j.lf5.LogRecord;
import org.apache.log4j.lf5.LogRecordFilter;

import java.util.Enumeration;

/**
 * An implementation of LogRecordFilter based on a CategoryExplorerModel
 *
 * @author Richard Wan
 */

// Contributed by ThoughtWorks Inc.

public class CategoryExplorerLogRecordFilter implements LogRecordFilter {
  //--------------------------------------------------------------------------
  //   Constants:
  //--------------------------------------------------------------------------

  //--------------------------------------------------------------------------
  //   Protected Variables:
  //--------------------------------------------------------------------------

  protected CategoryExplorerModel _model;

  //--------------------------------------------------------------------------
  //   Private Variables:
  //--------------------------------------------------------------------------

  //--------------------------------------------------------------------------
  //   Constructors:
  //--------------------------------------------------------------------------

  public CategoryExplorerLogRecordFilter(CategoryExplorerModel model) {
    _model = model;
  }

  //--------------------------------------------------------------------------
  //   Public Methods:
  //--------------------------------------------------------------------------

  /**
   * @return true if the CategoryExplorer model specified at construction
   * is accepting the category of the specified LogRecord.  Has a side-effect
   * of adding the CategoryPath of the LogRecord to the explorer model
   * if the CategoryPath is new.
   */
  public boolean passes(LogRecord record) {
    CategoryPath path = new CategoryPath(record.getCategory());
    return _model.isCategoryPathActive(path);
  }

  /**
   * Resets the counters for the contained CategoryNodes to zero.
   */
  public void reset() {
    resetAllNodes();
  }

  //--------------------------------------------------------------------------
  //   Protected Methods:
  //--------------------------------------------------------------------------

  protected void resetAllNodes() {
    Enumeration nodes = _model.getRootCategoryNode().depthFirstEnumeration();
    CategoryNode current;
    while (nodes.hasMoreElements()) {
      current = (CategoryNode) nodes.nextElement();
      current.resetNumberOfContainedRecords();
      _model.nodeChanged(current);
    }
  }
  //--------------------------------------------------------------------------
  //   Private Methods:
  //--------------------------------------------------------------------------

  //--------------------------------------------------------------------------
  //   Nested Top-Level Classes or Interfaces
  //--------------------------------------------------------------------------
}

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.