| /******************************************************************************* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * 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 |
| * 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.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); |
| } |
| } |