/*******************************************************************************
* Copyright 2013 SAP AG
*
* 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
*
* 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 com.sap.core.odata.processor.api.jpa.jpql;
import java.util.List;
import com.sap.core.odata.api.uri.KeyPredicate;
/**
* The interface provide a view on JPQL select single context.The interface
* provides methods for accessing the clause of a JPQL SELECT statement like
* "SELECT". The view can be used for building JPQL statements without any
* WHERE,JOIN,ORDERBY clauses. The clauses are built from OData read entity
* request views.
*
* @author SAP AG
* @see com.sap.core.odata.processor.api.jpa.jpql.JPQLStatement
*
*/
public interface JPQLSelectSingleContextView extends JPQLContextView {
/**
* The method returns a JPQL SELECT clause. The SELECT clause is built from
* $select OData system Query option.
*
* @return a String representing a SELECT clause in JPQL
*/
public String getSelectExpression();
/**
* The method returns the list of key predicates that can be used for
* constructing the WHERE clause in JPQL statements. The OData entity key
* predicates are thus converted into JPA entity keys.
*
* @return a list of key predicates
*/
public List<KeyPredicate> getKeyPredicates();
}