Java Map Merge mergeCountMaps(Map base, Map other)

License

Parameter

Declaration

public static <K> void mergeCountMaps(Map<K, Integer> base, Map<K, Integer> other) 

Method Source Code

//package com.java2s;
/**/*ww w.  j  a  va 2 s .  co m*/
 * The contents of this file may be used under the terms of the Apache License, Version 2.0
 * in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
 *
 * Copyright 2014, Ecarf.io
 *
 * 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.
 */

import java.util.Map;
import java.util.Map.Entry;

public class Main {
    /**
      * Merge two count maps of type <K, Integer>
     * @param <K>
      * @param base
      * @param other
      */
    public static <K> void mergeCountMaps(Map<K, Integer> base, Map<K, Integer> other) {
        for (Entry<K, Integer> entry : other.entrySet()) {
            K key = entry.getKey();
            Integer value = entry.getValue();
            if (base.get(key) == null) {
                base.put(key, value);
            } else {
                base.put(key, base.get(key) + value);
            }
        }
    }
}

Related

1. mergeBootArgumentsIntoMap(String[] args, Map map)
2. mergeCompactedValue(Map obj, String key, Object value)
3. mergeCompositions( Map target, Map source)
4. mergeConfig(Map userConfig, Map referenceConfig)
5. mergeCounterMap(Map map, String key, Object value)
6. mergeCounts(Map counter, String key)
7. mergeCustomProperties(Map copyTo, Map copyFrom)
8. mergeDefaults(Map content, Map defaults)
9. mergeEntries( Map dest, Iterable> entries)