org.bboxdb.network.client.response.JoinedTupleHandler Maven / Gradle / Ivy
/*******************************************************************************
*
* Copyright (C) 2015-2018 the BBoxDB project
*
* 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 org.bboxdb.network.client.response;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.List;
import org.bboxdb.network.client.BBoxDBConnection;
import org.bboxdb.network.client.future.network.NetworkOperationFuture;
import org.bboxdb.network.packages.PackageEncodeException;
import org.bboxdb.network.packages.response.JoinedTupleResponse;
import org.bboxdb.storage.entity.PagedTransferableEntity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class JoinedTupleHandler implements ServerResponseHandler {
/**
* The Logger
*/
private final static Logger logger = LoggerFactory.getLogger(JoinedTupleHandler.class);
/**
* Handle a single tuple as result
* @return
*/
@Override
public boolean handleServerResult(final BBoxDBConnection bBoxDBConnection,
final ByteBuffer encodedPackage, final NetworkOperationFuture future)
throws PackageEncodeException, InterruptedException {
if(logger.isDebugEnabled()) {
logger.debug("Handle joined tuple package");
}
final JoinedTupleResponse singleTupleResponse = JoinedTupleResponse.decodePackage(encodedPackage);
// Tuple is part of a multi tuple result
final Object currentResultObject = future.get(false);
if(currentResultObject instanceof List) {
@SuppressWarnings("unchecked")
final List currentResultList
= (List) currentResultObject;
currentResultList.add(singleTupleResponse.getJoinedTuple());
// The removal of the future depends, if this is a one
// tuple result or a multiple tuple result
return false;
}
// Single tuple is returned
if(future != null) {
future.setOperationResult(Arrays.asList(singleTupleResponse.getJoinedTuple()));
future.fireCompleteEvent();
}
return true;
}
}