All Downloads are FREE. Search and download functionalities are using the official Maven repository.
  • Log In
  • Register

    • io.streamthoughts.kafka.specs.internal.CollectionUtils Maven / Gradle / Ivy

    Go to download

    A command-line tool to help you automate the management of the configurations that live on your Apache Kafka clusters.

    There is a newer version: 0.30.0
    Show newest version
    /*
 * Copyright 2021 StreamThoughts.
 *
 * 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 io.streamthoughts.kafka.specs.internal;

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

public class CollectionUtils {


    @SuppressWarnings("unchecked")
    public static void toFlattenMap(final Map source,
                                     final Map result,
                                     final String key) {
        source.forEach((k, v) -> {
            final String currKey = key == null ? k : key + '.' + k;
            if (v instanceof Map) {
                toFlattenMap((Map) v, result, currKey);
            } else if (v instanceof List) {
                final List list = (List) v;
                for (int i = 0, size = list.size(); i < size; i++) {
                    result.put(currKey + '[' + (i + 1) + ']', list.get(i));
                }
            } else {
                result.put(currKey, v);
            }
        });
    }

    public static void toNestedMap(final Map source,
                                   final Map result,
                                   final String key) {

        source.forEach((k, v) -> {
            if (k.contains(".")) {
                String[] parts = k.split("\\.", 2);
                k = parts[0];
                v = Map.of(parts[1], v);
            }

            final String path = key == null ? k : key + "." + k;

            if (v instanceof Map) {
                @SuppressWarnings("unchecked")
                Map mapValue = (Map) v;
                Map nestedMap;
                if (result.containsKey(k)) {
                    Object nested = result.get(k);
                    if (nested instanceof Map) {
                        // create a new Map to make sure it is not immutable
                        nestedMap = new HashMap<>((Map) nested);
                    } else {
                        throw new IllegalArgumentException("Duplicate key: " + path);
                    }
                } else {
                    nestedMap = new HashMap<>();
                }
                toNestedMap(mapValue, nestedMap, path);
                result.put(k, nestedMap);
                return;
            }

            if (result.containsKey(k)) {
                throw new IllegalArgumentException("Duplicate key: " + path);
            }
            result.put(k, v);
        });
    }
}
    
    
    
    

    




    
    
    © 2015 - 2025 Weber Informatics LLC | Privacy Policy