org.springframework.batch.item.data.Neo4jItemReader Maven / Gradle / Ivy
/*
* Copyright 2012 the original author or authors.
*
* 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
*
* https://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.springframework.batch.item.data;
import java.util.ArrayList;
import java.util.Iterator;
import org.neo4j.ogm.session.Session;
/**
*
* Extensions of the {@link AbstractNeo4jItemReader}.
*
*
* @author Michael Minella
*/
public class Neo4jItemReader extends AbstractNeo4jItemReader {
@SuppressWarnings("unchecked")
@Override
protected Iterator doPageRead() {
Session session = getSessionFactory().openSession();
Iterable queryResults = session.query(getTargetType(),
generateLimitCypherQuery(),
getParameterValues());
if(queryResults != null) {
return queryResults.iterator();
}
else {
return new ArrayList().iterator();
}
}
}