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/*
 * Copyright 2008-present MongoDB, Inc.
 *
 * 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.mongodb.selector;

import com.mongodb.connection.ClusterConnectionMode;
import com.mongodb.connection.ClusterDescription;
import com.mongodb.connection.ServerDescription;

import java.util.List;

/**
 * A server selector that chooses servers that are writable.
 *
 * @since 3.1
 */
@Deprecated
public final class WritableServerSelector implements ServerSelector {

    @Override
    @SuppressWarnings("deprecation")
    public List select(final ClusterDescription clusterDescription) {
        if (clusterDescription.getConnectionMode() == ClusterConnectionMode.SINGLE) {
            return clusterDescription.getAny();
        }
        return clusterDescription.getPrimaries();
    }

    @Override
    public String toString() {
        return "WritableServerSelector";
    }
}