001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.activemq.util;
018    
019    import java.util.Map;
020    
021    /**
022     * A bunch of utility methods for working with maps
023     * 
024     * 
025     */
026    public final class MapHelper {
027    
028        private MapHelper() {
029        }
030    
031        /**
032         * Extracts the value from the map and coerces to a String
033         */
034        public static String getString(Map map, String key) {
035            Object answer = map.get(key);
036            return (answer != null) ? answer.toString() : null;
037        }
038    
039        /**
040         * Extracts the value from the map and coerces to an int value or returns a
041         * default value if one could not be found or coerced
042         */
043        public static int getInt(Map map, String key, int defaultValue) {
044            Object value = map.get(key);
045            if (value instanceof Number) {
046                return ((Number)value).intValue();
047            } else if (value instanceof String) {
048                return Integer.parseInt((String)value);
049            }
050            return defaultValue;
051        }
052    }