| /******************************************************************************* |
| * 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.core.jpql; |
| |
| import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException; |
| import org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLContextView; |
| import org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLSelectSingleContextView; |
| import org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLStatement; |
| import org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLStatement.JPQLStatementBuilder; |
| import org.apache.olingo.odata2.jpa.processor.core.ODataExpressionParser; |
| import org.apache.olingo.odata2.jpa.processor.core.ODataParameterizedWhereExpressionUtil; |
| |
| public class JPQLSelectSingleStatementBuilder extends JPQLStatementBuilder { |
| |
| JPQLStatement jpqlStatement; |
| private JPQLSelectSingleContextView context; |
| |
| public JPQLSelectSingleStatementBuilder(final JPQLContextView context) { |
| this.context = (JPQLSelectSingleContextView) context; |
| } |
| |
| @Override |
| public JPQLStatement build() throws ODataJPARuntimeException { |
| jpqlStatement = createStatement(createJPQLQuery()); |
| ODataParameterizedWhereExpressionUtil.setJPQLStatement(jpqlStatement.toString()); |
| ODataExpressionParser.reInitializePositionalParameters(); |
| return jpqlStatement; |
| |
| } |
| |
| private String createJPQLQuery() throws ODataJPARuntimeException { |
| |
| StringBuilder jpqlQuery = new StringBuilder(); |
| String tableAlias = context.getJPAEntityAlias(); |
| String fromClause = context.getJPAEntityName() + JPQLStatement.DELIMITER.SPACE + tableAlias; |
| |
| jpqlQuery.append(JPQLStatement.KEYWORD.SELECT).append(JPQLStatement.DELIMITER.SPACE); |
| jpqlQuery.append(context.getSelectExpression()).append(JPQLStatement.DELIMITER.SPACE); |
| jpqlQuery.append(JPQLStatement.KEYWORD.FROM).append(JPQLStatement.DELIMITER.SPACE); |
| jpqlQuery.append(fromClause); |
| |
| if (context.getKeyPredicates() != null && !context.getKeyPredicates().isEmpty()) { |
| jpqlQuery.append(JPQLStatement.DELIMITER.SPACE); |
| jpqlQuery.append(JPQLStatement.KEYWORD.WHERE).append(JPQLStatement.DELIMITER.SPACE); |
| jpqlQuery.append(ODataExpressionParser |
| .parseKeyPredicates(context.getKeyPredicates(), context.getJPAEntityAlias())); |
| } |
| |
| return jpqlQuery.toString(); |
| |
| } |
| |
| } |