/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.distributed.operator.format;
import lupos.distributed.operator.format.operatorcreator.IOperatorCreator;
import lupos.engine.operators.BasicOperator;
import lupos.engine.operators.index.BasicIndexScan;
import lupos.engine.operators.index.Root;
import org.json.JSONException;
import org.json.JSONObject;
/**
* Implements the formatter for the index scan operator
*/
public class IndexScanFormatter implements OperatorFormatter {
/** The index collection. */
private Root root;
/**
* the operator creator for creating the index scan operator
*/
private IOperatorCreator operatorCreator;
/**
* Instantiates a new index scan formatter.
*
* @param operatorCreator the operator creator for creating the index scan operator
*/
public IndexScanFormatter(final IOperatorCreator operatorCreator) {
this.operatorCreator = operatorCreator;
}
/**
* Instantiates a new index scan formatter.
*/
public IndexScanFormatter() {
}
/*
* (non-Javadoc)
*
* @see
* luposdate.operators.formatter.OperatorFormatter#serialize(lupos.engine
* .operators.BasicOperator, int)
*/
@Override
public JSONObject serialize(final BasicOperator operator, final int node_id) {
final BasicIndexScan indexScan = (BasicIndexScan) operator;
try {
final JSONObject json = Helper.createTriplePatternsJSONObject(indexScan.getTriplePattern());
json.put("type", BasicIndexScan.class.getName());
json.put("node_id", node_id);
return json;
} catch (final JSONException e) {
e.printStackTrace();
}
return new JSONObject();
}
/*
* (non-Javadoc)
*
* @see
* luposdate.operators.formatter.OperatorFormatter#deserialize(org.json.
* JSONObject)
*/
@Override
public BasicOperator deserialize(final JSONObject serializedOperator) throws JSONException {
return this.operatorCreator.createIndexScan(this.root, Helper.createTriplePatternsFromJSON(serializedOperator));
}
/**
* Sets the index collection.
*
* @param root
* the new index collection
*/
public void setRoot(final Root root) {
this.root = root;
}
}