/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements.  See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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;import java.util.Arrays;import java.util.HashMap;import java.util.List;import java.util.Map;/** * LogTableColumn * * @author Michael J. Sikorsky * @author Brad Marlborough */// Contributed by ThoughtWorks Inc.public class LogTableColumn implements java.io.Serializable {  private static final long serialVersionUID = -4275827753626456547L;  // log4j table columns.  public final static LogTableColumn DATE = new LogTableColumn("Date");  public final static LogTableColumn THREAD = new LogTableColumn("Thread");  public final static LogTableColumn MESSAGE_NUM = new LogTableColumn("Message #");  public final static LogTableColumn LEVEL = new LogTableColumn("Level");  public final static LogTableColumn NDC = new LogTableColumn("NDC");  public final static LogTableColumn CATEGORY = new LogTableColumn("Category");  public final static LogTableColumn MESSAGE = new LogTableColumn("Message");  public final static LogTableColumn LOCATION = new LogTableColumn("Location");  public final static LogTableColumn THROWN = new LogTableColumn("Thrown");  //--------------------------------------------------------------------------  //   Protected Variables:  //--------------------------------------------------------------------------  protected String _label;  //--------------------------------------------------------------------------  //   Private Variables:  //--------------------------------------------------------------------------  private static LogTableColumn[] _log4JColumns;  private static Map _logTableColumnMap;  //--------------------------------------------------------------------------  //   Constructors:  //--------------------------------------------------------------------------  static {    _log4JColumns = new LogTableColumn[]{DATE, THREAD, MESSAGE_NUM, LEVEL, NDC, CATEGORY,                                         MESSAGE, LOCATION, THROWN};    _logTableColumnMap = new HashMap();    for (int i = 0; i < _log4JColumns.length; i++) {      _logTableColumnMap.put(_log4JColumns[i].getLabel(), _log4JColumns[i]);    }  }  public LogTableColumn(String label) {    _label = label;  }  //--------------------------------------------------------------------------  //   Public Methods:  //--------------------------------------------------------------------------  /**   * Return the Label of the LogLevel.   */  public String getLabel() {    return _label;  }  /**   * Convert a column label into a LogTableColumn object.   *   * @param column The label of a level to be converted into a LogTableColumn.   * @return LogTableColumn The LogTableColumn with a label equal to column.   * @throws LogTableColumnFormatException Is thrown when the column can not be   *         converted into a LogTableColumn.   */  public static LogTableColumn valueOf(String column)      throws LogTableColumnFormatException {    LogTableColumn tableColumn = null;    if (column != null) {      column = column.trim();      tableColumn = (LogTableColumn) _logTableColumnMap.get(column);    }    if (tableColumn == null) {      StringBuffer buf = new StringBuffer();      buf.append("Error while trying to parse (" + column + ") into");      buf.append(" a LogTableColumn.");      throw new LogTableColumnFormatException(buf.toString());    }    return tableColumn;  }  public boolean equals(Object o) {    boolean equals = false;    if (o instanceof LogTableColumn) {      if (this.getLabel() ==          ((LogTableColumn) o).getLabel()) {        equals = true;      }    }    return equals;  }  public int hashCode() {    return _label.hashCode();  }  public String toString() {    return _label;  }  /**   * @return A <code>List</code> of <code>LogTableColumn/code> objects that map   * to log4j <code>Column</code> objects.   */  public static List getLogTableColumns() {    return Arrays.asList(_log4JColumns);  }  public static LogTableColumn[] getLogTableColumnArray() {    return _log4JColumns;  }  //--------------------------------------------------------------------------  //   Protected Methods:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Private Methods:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Nested Top-Level Classes or Interfaces:  //--------------------------------------------------------------------------}