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The MongoDB Java Driver uber-artifact, containing mongodb-driver, mongodb-driver-core, and bson

There is a newer version: 3.12.14

/*
 * 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.client.internal;

import com.mongodb.Function;
import com.mongodb.ServerAddress;
import com.mongodb.ServerCursor;
import com.mongodb.client.MongoCursor;
import com.mongodb.lang.Nullable;

import static com.mongodb.assertions.Assertions.notNull;

class MongoMappingCursor implements MongoCursor {
    private final MongoCursor proxied;
    private final Function mapper;

    MongoMappingCursor(final MongoCursor proxied, final Function mapper) {
        this.proxied = notNull("proxied", proxied);
        this.mapper = notNull("mapper", mapper);
    }

    @Override
    public void close() {
        proxied.close();
    }

    @Override
    public boolean hasNext() {
        return proxied.hasNext();
    }

    @Override
    public U next() {
        return mapper.apply(proxied.next());
    }

    @Nullable
    @Override
    public U tryNext() {
        T proxiedNext = proxied.tryNext();
        if (proxiedNext == null) {
            return null;
        } else {
            return mapper.apply(proxiedNext);
        }
    }

    @Override
    public void remove() {
        proxied.remove();
    }

    @Nullable
    @Override
    public ServerCursor getServerCursor() {
        return proxied.getServerCursor();
    }

    @Override
    public ServerAddress getServerAddress() {
        return proxied.getServerAddress();
    }
}