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An API to run three-phase short-circuit analysis
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/**
 * Copyright (c) 2022, RTE (http://www.rte-france.com)
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 * SPDX-License-Identifier: MPL-2.0
 */
package com.powsybl.shortcircuit.json;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.powsybl.shortcircuit.BranchFault;
import com.powsybl.shortcircuit.BusFault;
import com.powsybl.shortcircuit.Fault;

import java.io.IOException;

/**
 * @author Thomas Adam {@literal }
 */
public class FaultDeserializer extends StdDeserializer {

    FaultDeserializer() {
        super(Fault.class);
    }

    @Override
    public Fault deserialize(JsonParser parser, DeserializationContext deserializationContext) throws IOException {
        Fault.Type type = null;
        String id = null;
        String elementId = null;
        double r = Double.NaN;
        double x = Double.NaN;
        Fault.ConnectionType connection = Fault.ConnectionType.SERIES;
        Fault.FaultType faultType = Fault.FaultType.THREE_PHASE;
        double proportionalLocation = Double.NaN;
        while (parser.nextToken() != JsonToken.END_OBJECT) {
            switch (parser.currentName()) {
                case "type" -> {
                    parser.nextToken();
                    type = Fault.Type.valueOf(parser.readValueAs(String.class));
                }
                case "id" -> {
                    parser.nextToken();
                    id = parser.readValueAs(String.class);
                }
                case "elementId" -> {
                    parser.nextToken();
                    elementId = parser.readValueAs(String.class);
                }
                case "r" -> {
                    parser.nextToken();
                    r = parser.readValueAs(Double.class);
                }
                case "x" -> {
                    parser.nextToken();
                    x = parser.readValueAs(Double.class);
                }
                case "connection" -> {
                    parser.nextToken();
                    connection = Fault.ConnectionType.valueOf(parser.readValueAs(String.class));
                }
                case "faultType" -> {
                    parser.nextToken();
                    faultType = Fault.FaultType.valueOf(parser.readValueAs(String.class));
                }
                case "proportionalLocation" -> {
                    parser.nextToken();
                    proportionalLocation = parser.readValueAs(Double.class);
                }
                default -> throw new IllegalStateException("Unexpected field: " + parser.currentName());
            }
        }
        if (null == type) {
            throw new IllegalStateException("Required type field is missing");
        }

        return switch (type) {
            case BUS -> new BusFault(id, elementId, r, x, connection, faultType);
            case BRANCH -> new BranchFault(id, elementId, r, x, connection, faultType, proportionalLocation);
        };
    }
}