/* * Copyright 1999-2005 The Apache Software Foundation. *  * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at *  *      http://www.apache.org/licenses/LICENSE-2.0 *  * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */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  //--------------------------------------------------------------------------}