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 */
017package org.apache.activemq.util;
018
019import java.util.Map;
020
021/**
022 * A bunch of utility methods for working with maps
023 * 
024 * 
025 */
026public 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}