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* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.olingo.odata2.jpa.processor.ref.listeners;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.Query;
import org.apache.olingo.odata2.api.edm.EdmException;
import org.apache.olingo.odata2.api.uri.info.GetEntitySetUriInfo;
import org.apache.olingo.odata2.jpa.processor.api.ODataJPATombstoneContext;
import org.apache.olingo.odata2.jpa.processor.api.ODataJPATombstoneEntityListener;
import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPAModelException;
import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException;
import org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLContext;
import org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLContextType;
import org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLStatement;
public class SalesOrderItemTombstoneListener extends ODataJPATombstoneEntityListener {
@Override
public Query getQuery(final GetEntitySetUriInfo resultsView, final EntityManager em) {
JPQLContextType contextType = null;
try {
if (!resultsView.getStartEntitySet().getName().equals(resultsView.getTargetEntitySet().getName())) {
contextType = JPQLContextType.JOIN;
} else {
contextType = JPQLContextType.SELECT;
}
JPQLContext jpqlContext = JPQLContext.createBuilder(contextType, resultsView).build();
JPQLStatement jpqlStatement = JPQLStatement.createBuilder(jpqlContext).build();
String deltaToken = ODataJPATombstoneContext.getDeltaToken();
Query query = null;
if (deltaToken != null) {
String statement = jpqlStatement.toString();
String[] statementParts = statement.split(JPQLStatement.KEYWORD.WHERE);
String deltaCondition = jpqlContext.getJPAEntityAlias() + ".creationDate >= {ts '" + deltaToken + "'}";
if (statementParts.length > 1) {
statement =
statementParts[0] + JPQLStatement.DELIMITER.SPACE + JPQLStatement.KEYWORD.WHERE
+ JPQLStatement.DELIMITER.SPACE + deltaCondition + JPQLStatement.DELIMITER.SPACE
+ JPQLStatement.Operator.AND + statementParts[1];
} else {
statement =
statementParts[0] + JPQLStatement.DELIMITER.SPACE + JPQLStatement.KEYWORD.WHERE
+ JPQLStatement.DELIMITER.SPACE + deltaCondition;
}
query = em.createQuery(statement);
} else {
query = em.createQuery(jpqlStatement.toString());
}
return query;
} catch (EdmException e) {
return null;
} catch (ODataJPAModelException e) {
return null;
} catch (ODataJPARuntimeException e) {
return null;
}
}
@Override
public String generateDeltaToken(final List<Object> deltas, final Query query) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.000");
Date date = new Date(System.currentTimeMillis());
return dateFormat.format(date);
}
}