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Graylog
There is a newer version: 6.0.2
/**
 * This file is part of Graylog.
 *
 * Graylog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Graylog.  If not, see .
 */
package org.graylog2.contentpacks.model.entities;

import org.graylog2.contentpacks.exceptions.ContentPackException;
import org.graylog2.contentpacks.model.entities.references.ReferenceMap;
import org.graylog2.contentpacks.model.entities.references.ReferenceMapUtils;
import org.graylog2.contentpacks.model.entities.references.ValueReference;

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

public class WidgetConfig {
    private Map config;

    public WidgetConfig(ReferenceMap config, Map parameters) {
        this.config = ReferenceMapUtils.toValueMap(config, parameters);
    }

    public Optional getOptionalString(String key) {
        Object value = config.get(key);
        if (value instanceof String) {
            return Optional.of((String) value);
        }
        return Optional.empty();
    }

    public String getString(String key) throws ContentPackException {
        Object value = config.get(key);
        if (value instanceof String) {
            return (String) value;
        }
        throw new ContentPackException("Could not find key " + key + " in config.");
    }

    public boolean getBoolean(String key) throws ContentPackException {
        Object value = config.get(key);
        if (value != null) {
            return (boolean) value;
        }
        throw new ContentPackException("Could not find key " + key + " in config.");
    }

    public Optional getOptionalBoolean(String key) {
        final Boolean value = (Boolean)config.get(key);
        return Optional.ofNullable(value);
    }

    public int getInteger(String key) {
        Object value = config.get(key);
        if (value != null) {
            return (int) value;
        }
        throw new ContentPackException("Could not find key " + key + " in config.");
    }

    public Optional getOptionalInteger(String key) {
        Object value = config.get(key);
        if (value instanceof Integer) {
            return Optional.of((Integer) value);
        }
        return Optional.empty();
    }

    public List