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/*
 * Copyright 2016 Goldman Sachs.
 *
 * 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.gs.dmn.signavio.transformation;

import com.gs.dmn.DMNModelRepository;
import com.gs.dmn.ast.TItemDefinition;
import com.gs.dmn.log.BuildLogger;
import com.gs.dmn.log.Slf4jBuildLogger;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

public class GenerateMissingItemDefinitionsTransformer extends AbstractMissingItemDefinitionsTransformer {
    private static final String ELEMENT_DEFINITIONS = "definitions";
    private static final String ELEMENT_DEFINITION = "definition";
    private static final String FIELD_NAME = "name";
    private static final String FIELD_TYPE = "type";
    private static final String FIELD_COLLECTION = "isCollection";

    private List definitions;

    public GenerateMissingItemDefinitionsTransformer() {
        this(new Slf4jBuildLogger(LOGGER));
    }

    public GenerateMissingItemDefinitionsTransformer(BuildLogger logger) {
        super(logger);
    }

    @Override
    public void configure(Map configuration) {
        this.definitions = parseConfigurationForDefinitions(configuration);
    }

    @Override
    public DMNModelRepository transform(DMNModelRepository repository) {
        if (isEmpty(repository)) {
            logger.warn("Repository is empty; transformer will not run");
            return repository;
        }

        if (this.definitions == null || this.definitions.isEmpty()) {
            logger.warn("No definitions provided; transformer will not run");
            return repository;
        }

        addNewDefinitions(repository, this.definitions);

        this.transformRepository = false;
        return repository;
    }

    private List parseConfigurationForDefinitions(Map configuration) {
        List result = new ArrayList<>();

        List