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}