MapHelper xref

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    1   /***
    2    *
    3    * Copyright 2004 Protique Ltd
    4    *
    5    * Licensed under the Apache License, Version 2.0 (the "License");
    6    * you may not use this file except in compliance with the License.
    7    * 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   **/
    18  package org.codehaus.activemq.util;
    19
    20  import java.util.Map;
    21
    22  /***
    23   * A bunch of utility methods for working with maps
    24   *
    25   * @version $Revision: 1.1 $
    26   */
    27  public class MapHelper {
    28      /***
    29       * Extracts the value from the map and coerces to a String
    30       */
    31      public static String getString(Map map, String key) {
    32          Object answer = map.get(key);
    33          return (answer != null) ? answer.toString() : null;
    34      }
    35
    36      /***
    37       * Extracts the value from the map and coerces to an int value
    38       * or returns a default value if one could not be found or coerced
    39       */
    40      public static int getInt(Map map, String key, int defaultValue) {
    41          Object value = map.get(key);
    42          if (value instanceof Number) {
    43              return ((Number) value).intValue();
    44          }
    45          else if (value instanceof String) {
    46              return Integer.parseInt((String) value);
    47          }
    48          return defaultValue;
    49      }
    50  }