org.graylog.plugins.beats.MapUtils Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of graylog2-server Show documentation

Graylog

There is a newer version: 6.1.4

/*
 * Copyright (C) 2020 Graylog, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Server Side Public License, version 1,
 * as published by MongoDB, Inc.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * Server Side Public License for more details.
 *
 * You should have received a copy of the Server Side Public License
 * along with this program. If not, see
 * .
 */
package org.graylog.plugins.beats;

import java.util.HashMap;
import java.util.Map;

public final class MapUtils {
    public static Map flatten(Map originalMap, String parentKey, String separator) {
        final Map result = new HashMap<>();
        for (Map.Entry entry : originalMap.entrySet()) {
            final String key = parentKey.isEmpty() ? entry.getKey() : parentKey + separator + entry.getKey();
            final Object value = entry.getValue();
            if (value instanceof Map) {
                @SuppressWarnings("unchecked")
                final Map valueMap = (Map) value;
                result.putAll(flatten(valueMap, key, separator));
            } else {
                result.put(key, value);
            }
        }
        return result;
    }

    public static void renameKey(Map map, String originalKey, String newKey) {
        if (map.containsKey(originalKey)) {
            final Object value = map.remove(originalKey);
            map.put(newKey, value);
        }
    }

    public static Map replaceKeyCharacter(Map map, char oldChar, char newChar) {
        final Map result = new HashMap<>(map.size());
        for (Map.Entry entry : map.entrySet()) {
            final String key = entry.getKey().replace(oldChar, newChar);
            final Object value = entry.getValue();
            result.put(key, value);
        }
        return result;
    }

    private MapUtils() {
        throw new AssertionError("No instances allowed");
    }
}