| /* |
| * 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 |
| <<<<<<< Updated upstream |
| * |
| * 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 |
| ======= |
| * |
| * 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 |
| >>>>>>> Stashed changes |
| * limitations under the License. |
| */ |
| package javax.jdo.query; |
| |
| /** |
| * Expression representing the ordering using an expression and a direction. |
| * |
| * @param <T> Java type of the expression being represented here |
| */ |
| public interface OrderExpression<T> { |
| public enum OrderDirection { |
| ASC, |
| DESC |
| } |
| |
| public enum OrderNullsPosition { |
| FIRST, |
| LAST |
| } |
| |
| /** |
| * Accessor for the direction of the ordering with this expression. |
| * |
| * @return The direction |
| */ |
| OrderDirection getDirection(); |
| |
| /** |
| * Accessor for the expression being used for ordering. |
| * |
| * @return Ordering expression |
| */ |
| Expression<T> getExpression(); |
| |
| /** |
| * Accessor for the position of nulls with this expression. |
| * |
| * @return The nulls position (or null if not defined) |
| */ |
| OrderNullsPosition getNullsPosition(); |
| |
| /** |
| * Method to set nulls to be ordered BEFORE non-nulls. |
| * |
| * @return The order expression |
| */ |
| OrderExpression<T> nullsFirst(); |
| |
| /** |
| * Method to set nulls to be ordered AFTER non-nulls. |
| * |
| * @return The order expression |
| */ |
| OrderExpression<T> nullsLast(); |
| } |