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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.internal.connection;

import com.mongodb.MongoCompressor;
import com.mongodb.MongoDriverInformation;
import com.mongodb.connection.ServerId;
import com.mongodb.connection.StreamFactory;
import com.mongodb.event.CommandListener;
import org.bson.BsonDocument;
import java.util.ArrayList;
import java.util.List;
import static com.mongodb.assertions.Assertions.notNull;
import static com.mongodb.internal.connection.ClientMetadataHelper.createClientMetadataDocument;

// @deprecated Usage of this API is not supported in AEM as a Cloud Service.
@Deprecated(since = "2021-05-27")
class InternalStreamConnectionFactory implements InternalConnectionFactory {

    private final StreamFactory streamFactory;

    private final BsonDocument clientMetadataDocument;

    private final List authenticators;

    private final List compressorList;

    private final CommandListener commandListener;

    InternalStreamConnectionFactory(final StreamFactory streamFactory, final List credentialList, final String applicationName, final MongoDriverInformation mongoDriverInformation, final List compressorList, final CommandListener commandListener) {
        this.streamFactory = notNull("streamFactory", streamFactory);
        this.compressorList = notNull("compressorList", compressorList);
        this.commandListener = commandListener;
        this.clientMetadataDocument = createClientMetadataDocument(applicationName, mongoDriverInformation);
        notNull("credentialList", credentialList);
        this.authenticators = new ArrayList(credentialList.size());
        for (MongoCredentialWithCache credential : credentialList) {
            authenticators.add(createAuthenticator(credential));
        }
    }

    @Override
    public InternalConnection create(final ServerId serverId) {
        return new InternalStreamConnection(serverId, streamFactory, compressorList, commandListener, new InternalStreamConnectionInitializer(authenticators, clientMetadataDocument, compressorList));
    }

    private Authenticator createAuthenticator(final MongoCredentialWithCache credential) {
        if (credential.getAuthenticationMechanism() == null) {
            return new DefaultAuthenticator(credential);
        }
        switch(credential.getAuthenticationMechanism()) {
            case GSSAPI:
                return new GSSAPIAuthenticator(credential);
            case PLAIN:
                return new PlainAuthenticator(credential);
            case MONGODB_X509:
                return new X509Authenticator(credential);
            case SCRAM_SHA_1:
            case SCRAM_SHA_256:
                return new ScramShaAuthenticator(credential);
            case MONGODB_CR:
                return new NativeAuthenticator(credential);
            default:
                throw new IllegalArgumentException("Unsupported authentication mechanism " + credential.getAuthenticationMechanism());
        }
    }
}