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/*******************************************************************************
 * Copyright (C) 2022-2023 WaveMaker, Inc.
 *
 * 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.
 ******************************************************************************/

package com.wavemaker.commons.util;

import java.util.Properties;

import org.springframework.beans.factory.config.YamlProcessor;
import org.springframework.core.CollectionFactory;

/**
 * This class uses YamlProcessor to convert the yaml resources to properties.
 * The Properties created by this class have nested paths for hierarchical
 * objects, so for instance this YAML
 *
 * 
 * environments:
 *   dev:
 *     url: https://dev.bar.com
 *     name: Developer Setup
 *   prod:
 *     url: https://foo.bar.com
 *     name: My Cool App
 * 
 *
 * is transformed into these properties:
 *
 *  * environments.dev.url=https://dev.bar.com
 * environments.dev.name=Developer Setup
 * environments.prod.url=https://foo.bar.com
 * environments.prod.name=My Cool App
 * 
 *
 * Lists are split as property keys with [] dereferencers, for
 * example this YAML:
 *
 *  * servers:
 * - dev.bar.com
 * - foo.bar.com
 * 
 *
 * becomes properties like this:
 *
 *  * servers[0]=dev.bar.com
 * servers[1]=foo.bar.com
 * 
 */
public class DefaultYamlProcessor extends YamlProcessor {

    public Properties getProperties() {
        return createProperties();
    }

    private Properties createProperties() {
        Properties result = CollectionFactory.createStringAdaptingProperties();
        process((properties, map) -> result.putAll(properties));
        return result;
    }
}