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/*
 * Copyright (C) 2020 Graylog, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Server Side Public License, version 1,
 * as published by MongoDB, Inc.
 *
 * This program 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
 * Server Side Public License for more details.
 *
 * You should have received a copy of the Server Side Public License
 * along with this program. If not, see
 * .
 */
package org.graylog2.contentpacks.facades;

import com.google.common.graph.Graph;
import org.graylog2.contentpacks.EntityDescriptorIds;
import org.graylog2.contentpacks.model.ModelType;
import org.graylog2.contentpacks.model.ModelTypes;
import org.graylog2.contentpacks.model.entities.Entity;
import org.graylog2.contentpacks.model.entities.EntityDescriptor;
import org.graylog2.contentpacks.model.entities.EntityExcerpt;
import org.graylog2.contentpacks.model.entities.NativeEntity;
import org.graylog2.contentpacks.model.entities.NativeEntityDescriptor;
import org.graylog2.contentpacks.model.entities.references.ValueReference;
import org.graylog2.utilities.Graphs;

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

public class RootEntityFacade implements EntityFacade {
    public static final ModelType TYPE = ModelTypes.ROOT;

    @Override
    public NativeEntity createNativeEntity(Entity entity,
                                                 Map parameters,
                                                 Map nativeEntities,
                                                 String username) {
        throw new UnsupportedOperationException("Unsupported operation for root entity");
    }

    @Override
    public Optional> loadNativeEntity(NativeEntityDescriptor nativeEntityDescriptor) {
        return Optional.empty();
    }

    @Override
    public void delete(Void nativeEntity) {
    }

    @Override
    public EntityExcerpt createExcerpt(Void nativeEntity) {
        throw new UnsupportedOperationException("Unsupported operation for root entity");
    }

    @Override
    public Set listEntityExcerpts() {
        return Collections.emptySet();
    }

    @Override
    public Optional exportEntity(EntityDescriptor entityDescriptor, EntityDescriptorIds entityDescriptorIds) {
        return Optional.empty();
    }

    @Override
    public Graph resolveNativeEntity(EntityDescriptor entityDescriptor) {
        return Graphs.emptyDirectedGraph();
    }

    @Override
    public Graph resolveForInstallation(Entity entity,
                                                Map parameters,
                                                Map entities) {
        return Graphs.emptyDirectedGraph();
    }
}