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/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.sdc.enrichment.impl.external.artifact;

import java.lang.reflect.Constructor;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.openecomp.core.utilities.file.FileUtils;
import org.openecomp.core.utilities.json.JsonUtil;
import org.openecomp.sdc.datatypes.error.ErrorMessage;
import org.openecomp.sdc.enrichment.inter.Enricher;
import org.openecomp.sdc.enrichment.inter.ExternalArtifactEnricherInterface;
import org.openecomp.sdc.tosca.datatypes.ToscaServiceModel;

public class ExternalArtifactEnricher extends Enricher {

    private static final String EXTERNAL_ARTIFACT_ENRICH_CONF_FILE = "ExternalArtifactConfiguration" + ".json";
    private static Collection<String> implementingClasses = getExternalArtifactEnrichedImplClassesList();

    private static Collection<String> getExternalArtifactEnrichedImplClassesList() {
        @SuppressWarnings("unchecked") Map<String, String> confFileAsMap = FileUtils
            .readViaInputStream(EXTERNAL_ARTIFACT_ENRICH_CONF_FILE, stream -> JsonUtil.json2Object(stream, Map.class));
        return confFileAsMap.values();
    }

    @Override
    public Map<String, List<ErrorMessage>> enrich() throws Exception {
        Map<String, List<ErrorMessage>> errors = new HashMap<>();
        for (String implementingClassName : implementingClasses) {
            ExternalArtifactEnricherInterface externalArtifactEnricherInstance = getExternalArtifactEnricherInstance(implementingClassName);
            errors.putAll(externalArtifactEnricherInstance.enrich(this.data, (ToscaServiceModel) this.model));
        }
        return errors;
    }

    private ExternalArtifactEnricherInterface getExternalArtifactEnricherInstance(String implementingClassName) throws Exception {
        Class<?> clazz = Class.forName(implementingClassName);
        Constructor<?> constructor = clazz.getConstructor();
        return (ExternalArtifactEnricherInterface) constructor.newInstance();
    }
}