User.java example

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hydra-master
/*
 * 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.addthis.hydra.job.auth;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import java.util.List;

public interface User {

    @Nonnull String name();

    @Nonnull List<String> groups();

    default @Nullable String primaryGroup() {
        List<String> groups = groups();
        if (groups.size() > 0) {
            return groups.get(0);
        } else {
            return null;
        }
    }

}