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/*
 * Copyright (C) 2022 The Libphonenumber Authors
 *
 * Licensed 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 com.google.i18n.phonenumbers.metadata.source;

import com.google.i18n.phonenumbers.Phonemetadata.PhoneMetadata;
import com.google.i18n.phonenumbers.internal.GeoEntityUtility;

/**
 * A source of phone metadata split by geographical regions.
 */
public interface RegionMetadataSource {

  /**
   * Returns phone metadata for provided geographical region.
   *
   * The {@code regionCode} must be different from {@link
   * GeoEntityUtility#REGION_CODE_FOR_NON_GEO_ENTITIES}, which has a special meaning and is used to
   * mark non-geographical regions (see {@link NonGeographicalEntityMetadataSource} for more
   * information).
   *
   * @return the phone metadata for provided {@code regionCode}, or null if there is none.
   * @throws IllegalArgumentException if provided {@code regionCode} is {@link
   * GeoEntityUtility#REGION_CODE_FOR_NON_GEO_ENTITIES}
   */
  PhoneMetadata getMetadataForRegion(String regionCode);
}