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/*
 * Copyright © 2016-2017 European Support Limited
 *
 * 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 org.openecomp.sdc.vendorsoftwareproduct.impl.orchestration.process;

import static org.openecomp.sdc.vendorsoftwareproduct.impl.orchestration.OrchestrationUtil.ORCHESTRATION_CONFIG_NAMESPACE;

import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import org.onap.config.api.Configuration;
import org.onap.config.api.ConfigurationManager;
import org.openecomp.core.utilities.CommonMethods;
import org.openecomp.core.utilities.orchestration.OnboardingTypesEnum;
import org.openecomp.sdc.datatypes.configuration.ImplementationConfiguration;
import org.openecomp.sdc.vendorsoftwareproduct.types.ConfigConstants;

public class OrchestrationProcessFactory {

    private static final Map<String, ImplementationConfiguration> PROCESS_IMPL_MAP;

    static {
        Configuration config = ConfigurationManager.lookup();
        PROCESS_IMPL_MAP = new ConcurrentHashMap<>(
            config.populateMap(ORCHESTRATION_CONFIG_NAMESPACE, ConfigConstants.PROCESS_IMPL_KEY, ImplementationConfiguration.class));
    }

    private OrchestrationProcessFactory() {
    }

    public static Optional<OrchestrationTemplateProcessHandler> getInstance(String fileSuffix) {
        if (fileSuffix == null) {
            return Optional.empty();
        }
        String updatedFileSuffix = fileSuffix;
        updatedFileSuffix = updatedFileSuffix.toLowerCase().trim();
        OnboardingTypesEnum onboardingTypesEnum = OnboardingTypesEnum.getOnboardingTypesEnum(updatedFileSuffix);
        if (onboardingTypesEnum == null) {
            return Optional.empty();
        }
        try {
            return Optional.of(createInstance(PROCESS_IMPL_MAP.get(onboardingTypesEnum.toString())));
        } catch (Exception e) {
            return Optional.empty();
        }
    }

    private static OrchestrationTemplateProcessHandler createInstance(ImplementationConfiguration implClass) throws Exception {
        OrchestrationTemplateProcessHandler handler;
        handler = CommonMethods.newInstance(implClass.getImplementationClass(), OrchestrationTemplateProcessHandler.class);
        return handler;
    }
}