services/billing-aws/src/main/java/com/epam/dlab/configuration/ConfigJsonGenerator.java

/*
 * 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 com.epam.dlab.configuration;

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

import com.epam.dlab.core.BillingUtils;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

/** Generate the json configuration of billing tool.
 */
public class ConfigJsonGenerator {

	/** Buffer for configuration properties. */
	private Map<String, Map<String, String>[]> config = new HashMap<>();
	
	/** Add the properties of module to configuration.
	 * @param moduleName the name of module.
	 * @param properties the properties: key and value sequence.
	 */
	private ConfigJsonGenerator withModule(String moduleName, String ... properties) {
		if (properties == null) {
			config.remove(moduleName);
			return this;
		}
		
		@SuppressWarnings("unchecked")
		Map<String, String>[] map = new Map[1];
		map[0] = BillingUtils.stringsToMap(properties);
		config.put(moduleName, map);
		return this;
	}

	/** Add the properties of input adapter to configuration.
	 * @param properties the properties: key and value sequence.
	 */
	public ConfigJsonGenerator withAdapterIn(String ... properties) {
		return withModule("adapterIn", properties);
	}
	
	/** Add the properties of output adapter to configuration.
	 * @param properties the properties: key and value sequence.
	 */
	public ConfigJsonGenerator withAdapterOut(String ... properties) {
		return withModule("adapterOut", properties);
	}
	
	/** Add the properties of parser to configuration.
	 * @param properties the properties: key and value sequence.
	 */
	public ConfigJsonGenerator withParser(String ... properties) {
		return withModule("parser", properties);
	}
	
	/** Add the properties of filter to configuration.
	 * @param properties the properties: key and value sequence.
	 */
	public ConfigJsonGenerator withFilter(String ... properties) {
		return withModule("filter", properties);
	}
	
	/** Build and return json configuration.
	 * @param properties the properties: key and value sequence.
	 */
	public JsonNode build() {
		return new ObjectMapper()
				.valueToTree(config);
	}
}