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package com.emc.ecs.connector.cloudfoundry;

import com.emc.ecs.connector.S3ServiceInfo;
import org.springframework.cloud.cloudfoundry.CloudFoundryServiceInfoCreator;
import org.springframework.cloud.cloudfoundry.Tags;

import java.util.Map;

/**
 * Provides an implementation of {@link CloudFoundryServiceInfoCreator} that detects S3 tagged
 * services bound to Cloud Foundry deployed application.  This class will be discovered and
 * used automatically in a Spring Cloud Connector enabled application.
 */
public class S3ServiceInfoCreator extends CloudFoundryServiceInfoCreator {
    /**
     * Default Constructor.
     * The default behavior of the constructor is to match any Cloud Foundry service with a
     * tag of "s3"
     */
    public S3ServiceInfoCreator() {
        super(new Tags("s3"));
    }

    /**
     * Parses Cloud Foundry serviceData Map and returns a normalized S3ServiceInfo instance
     * to be used by Spring Cloud service connector creators.  This Cloud Foundry serviceData
     * Map is created based on the VCAP_SERVICES environment variable.
     *
     * @param serviceData a java.util.Map containing the following required fields:  name,
     *                    accessKey, secretKey; and the following optional fields:  bucket &
     *                    endpoint.
     * @return {@link S3ServiceInfo S3ServiceInfo}
     */
    @Override
    public S3ServiceInfo createServiceInfo(Map serviceData) {
        @SuppressWarnings("unchecked")
        Map credentials = (Map) serviceData.get("credentials");

        String id = (String) serviceData.get("name");
        String accessKey = credentials.get("accessKey");
        String secretKey = credentials.get("secretKey");
        String bucket = credentials.get("bucket");
        String endpoint = credentials.get("endpoint");

        return new S3ServiceInfo(id, accessKey, secretKey, endpoint, bucket);
    }
}