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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.log4j.lf5.viewer.categoryexplorer;
    18
    19  import java.util.LinkedList;
    20  import java.util.StringTokenizer;
    21
    22  /**
    23   * CategoryPath is a collection of CategoryItems which represent a
    24   * path of categories.
    25   *
    26   * @author Michael J. Sikorsky
    27   * @author Robert Shaw
    28   */
    29
    30  // Contributed by ThoughtWorks Inc.
    31
    32  public class CategoryPath {
    33    //--------------------------------------------------------------------------
    34    //   Constants:
    35    //--------------------------------------------------------------------------
    36
    37    //--------------------------------------------------------------------------
    38    //   Protected Variables:
    39    //--------------------------------------------------------------------------
    40    protected LinkedList _categoryElements = new LinkedList();
    41
    42    //--------------------------------------------------------------------------
    43    //   Private Variables:
    44    //--------------------------------------------------------------------------
    45
    46    //--------------------------------------------------------------------------
    47    //   Constructors:
    48    //--------------------------------------------------------------------------
    49
    50    public CategoryPath() {
    51      super();
    52    }
    53
    54    /**
    55     * Construct a CategoryPath.  If the category is null, it defaults to "Debug".
    56     */
    57    public CategoryPath(String category) {
    58      String processedCategory = category;
    59
    60      if (processedCategory == null) {
    61        processedCategory = "Debug";
    62      }
    63
    64      processedCategory = processedCategory.replace('/', '.');
    65      processedCategory = processedCategory.replace('\\', '.');
    66
    67      StringTokenizer st = new StringTokenizer(processedCategory, ".");
    68      while (st.hasMoreTokens()) {
    69        String element = st.nextToken();
    70        addCategoryElement(new CategoryElement(element));
    71      }
    72    }
    73
    74    //--------------------------------------------------------------------------
    75    //   Public Methods:
    76    //--------------------------------------------------------------------------
    77
    78    /**
    79     * returns the number of CategoryElements.
    80     */
    81    public int size() {
    82      int count = _categoryElements.size();
    83
    84      return (count);
    85    }
    86
    87    public boolean isEmpty() {
    88      boolean empty = false;
    89
    90      if (_categoryElements.size() == 0) {
    91        empty = true;
    92      }
    93
    94      return (empty);
    95    }
    96
    97
    98    /**
    99     * Removes all categoryElements.
    100    */
    101   public void removeAllCategoryElements() {
    102     _categoryElements.clear();
    103   }
    104
    105   /**
    106    * Adds the specified categoryElement to the end of the categoryElement set.
    107    */
    108   public void addCategoryElement(CategoryElement categoryElement) {
    109     _categoryElements.addLast(categoryElement);
    110   }
    111
    112   /**
    113    * Returns the CategoryElement at the specified index.
    114    */
    115   public CategoryElement categoryElementAt(int index) {
    116     return ((CategoryElement) _categoryElements.get(index));
    117   }
    118
    119
    120   public String toString() {
    121     StringBuffer out = new StringBuffer(100);
    122
    123     out.append("\n");
    124     out.append("===========================\n");
    125     out.append("CategoryPath:                   \n");
    126     out.append("---------------------------\n");
    127
    128     out.append("\nCategoryPath:\n\t");
    129
    130     if (this.size() > 0) {
    131       for (int i = 0; i < this.size(); i++) {
    132         out.append(this.categoryElementAt(i).toString());
    133         out.append("\n\t");
    134       }
    135     } else {
    136       out.append("<<NONE>>");
    137     }
    138
    139     out.append("\n");
    140     out.append("===========================\n");
    141
    142     return (out.toString());
    143   }
    144
    145   //--------------------------------------------------------------------------
    146   //   Protected Methods:
    147   //--------------------------------------------------------------------------
    148
    149   //--------------------------------------------------------------------------
    150   //   Private Methods:
    151   //--------------------------------------------------------------------------
    152
    153   //--------------------------------------------------------------------------
    154   //   Nested Top-Level Classes or Interfaces:
    155   //--------------------------------------------------------------------------
    156
    157 }