for checkstyle

package io.shardingjdbc.spring.boot.util;

import com.google.common.base.Preconditions;

import lombok.AccessLevel;

import lombok.NoArgsConstructor;

import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;

import org.springframework.boot.bind.RelaxedPropertyResolver;

import org.springframework.core.env.Environment;

 *

 * @author caohao

 */

public class EnvironmentAwareUtil {

@NoArgsConstructor(access = AccessLevel.PRIVATE)

public final class EnvironmentAwareUtil {

    /**

     * Set data source map.

     * 

     * @param dataSourceMap data source map

     * @param environment environment for spring boot

     */

    public static void setDataSourceMap(final Map<String, DataSource> dataSourceMap, final Environment environment) {

        RelaxedPropertyResolver propertyResolver = new RelaxedPropertyResolver(environment, "sharding.jdbc.datasource.");

        String dataSources = propertyResolver.getProperty("names");

        for (String each : dataSources.split(",")) {

            try {

                Map<String, Object> dataSourceProps = propertyResolver.getSubProperties(each + ".");

                if (dataSourceProps.isEmpty()) {

                    throw new RuntimeException("Wrong datasource properties!");

                }

                Preconditions.checkState(!dataSourceProps.isEmpty(), "Wrong datasource properties!");

                DataSource dataSource = DataSourceBuilder.create().driverClassName(dataSourceProps.get("driver-class-name").toString())

                        .username(dataSourceProps.get("username").toString()).password(dataSourceProps.get("password").toString())

                        .url(dataSourceProps.get("url").toString()).type((Class<? extends DataSource>) Class.forName(dataSourceProps.get("type").toString())).build();