/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.atlas.web.adapters;


import org.apache.atlas.exception.AtlasBaseException;
import org.apache.atlas.model.TypeCategory;
import org.apache.atlas.type.AtlasMapType;
import org.apache.atlas.type.AtlasType;
import org.apache.atlas.type.AtlasTypeRegistry;

import javax.inject.Inject;
import java.util.HashMap;
import java.util.Map;

public class AtlasMapFormatConverter implements AtlasFormatAdapter {

    protected AtlasFormatConverters registry;

    @Inject
    public void init(AtlasFormatConverters registry) throws AtlasBaseException {
        this.registry = registry;
        registry.registerConverter(this, AtlasFormatConverters.VERSION_V1, AtlasFormatConverters.VERSION_V2);
        registry.registerConverter(this, AtlasFormatConverters.VERSION_V2, AtlasFormatConverters.VERSION_V1);
    }

    @Override
    public Map convert(String sourceVersion, String targetVersion, final AtlasType type, final Object source) throws AtlasBaseException {
       Map newMap = new HashMap<>();

        if ( source != null) {
            Map origMap = (Map) source;
            for (Object key : origMap.keySet()) {


                AtlasMapType mapType = (AtlasMapType) type;
                AtlasType keyType = mapType.getKeyType();
                AtlasType valueType = mapType.getValueType();
                AtlasFormatAdapter keyConverter = registry.getConverter(sourceVersion, targetVersion, keyType.getTypeCategory());
                Object convertedKey = keyConverter.convert(sourceVersion, targetVersion, keyType, key);
                Object val = origMap.get(key);

                if (val != null) {
                    AtlasFormatAdapter valueConverter = registry.getConverter(sourceVersion, targetVersion, valueType.getTypeCategory());
                    newMap.put(convertedKey, valueConverter.convert(sourceVersion, targetVersion, valueType, val));
                } else {
                    newMap.put(convertedKey, val);
                }
            }
        }
        return newMap;
    }

    @Override
    public TypeCategory getTypeCategory() {
        return TypeCategory.MAP;
    }
}

