org.codelibs.elasticsearch.df.util.MapUtils Maven / Gradle / Ivy

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This plugin provides several response formats.

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package org.codelibs.elasticsearch.df.util;

import java.util.Map;

public class MapUtils {
    private MapUtils() {
    }

    @SuppressWarnings("unchecked")
    public static void convertToFlatMap(final String prefix,
            final Map oldMap, final Map newMap) {
        for (final Map.Entry entry : oldMap.entrySet()) {
            final Object value = entry.getValue();
            if (value instanceof Map) {
                convertToFlatMap(prefix + entry.getKey() + ".",
                        (Map) value, newMap);
            } else {
                newMap.put(prefix + entry.getKey(), value);
            }
        }
    }
}