trunk/activemq-core/src/main/java/org/apache/activemq/util/MapHelper.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.activemq.util;

import java.util.Map;

/**
 * A bunch of utility methods for working with maps
 * 
 * 
 */
public final class MapHelper {

    private MapHelper() {
    }

    /**
     * Extracts the value from the map and coerces to a String
     */
    public static String getString(Map map, String key) {
        Object answer = map.get(key);
        return (answer != null) ? answer.toString() : null;
    }

    /**
     * Extracts the value from the map and coerces to an int value or returns a
     * default value if one could not be found or coerced
     */
    public static int getInt(Map map, String key, int defaultValue) {
        Object value = map.get(key);
        if (value instanceof Number) {
            return ((Number)value).intValue();
        } else if (value instanceof String) {
            return Integer.parseInt((String)value);
        }
        return defaultValue;
    }
}