org.ros.internal.message.new_style.DefaultedClassMap.java Source code

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Here is the source code for org.ros.internal.message.new_style.DefaultedClassMap.java

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/*
 * Copyright (C) 2011 Google Inc.
 * 
 * Licensed 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.ros.internal.message.new_style;

import com.google.common.collect.Maps;

import java.util.Map;

/**
 * @author damonkohler@google.com (Damon Kohler)
 */
class DefaultedClassMap<T> {

    private final Map<String, Class<? extends T>> map;
    private final Class<? extends T> defaultClass;

    public static <T> DefaultedClassMap<T> newFromDefaultClass(Class<? extends T> defaultValue) {
        return new DefaultedClassMap<T>(defaultValue);
    }

    private DefaultedClassMap(Class<? extends T> defaultClass) {
        this.defaultClass = defaultClass;
        map = Maps.newConcurrentMap();
    }

    public void put(String key, Class<? extends T> value) {
        map.put(key, value);
    }

    public Class<? extends T> get(String key) {
        if (!map.containsKey(key)) {
            return defaultClass;
        }
        return map.get(key);
    }
}