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OpenRefine is a free, open source power tool for working with messy data and improving it

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/*******************************************************************************
 * Copyright (C) 2018, OpenRefine contributors
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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package com.google.refine.browsing;

import java.io.IOException;
import java.util.Collections;
import java.util.List;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;

import com.google.refine.browsing.Engine.Mode;
import com.google.refine.browsing.facets.FacetConfig;
import com.google.refine.util.ParsingUtilities;

public class EngineConfig {

    protected final List _facets;
    protected final Mode _mode;

    @JsonCreator
    public EngineConfig(
            @JsonProperty("facets") List facets,
            @JsonProperty("mode") Mode mode) {
        _facets = facets == null ? Collections.emptyList() : facets;
        _mode = mode == null ? Mode.RowBased : mode;
    }

    @JsonProperty("mode")
    public Mode getMode() {
        return _mode;
    }

    @JsonProperty("facets")
    public List getFacetConfigs() {
        return _facets;
    }

    public static EngineConfig reconstruct(String json) {
        if (json == null) {
            return new EngineConfig(Collections.emptyList(), Mode.RowBased);
        }
        try {
            return ParsingUtilities.mapper.readValue(json, EngineConfig.class);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }
}