| /* |
| * 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.calcite.linq4j; |
| |
| import org.apache.calcite.linq4j.tree.Expression; |
| |
| import java.lang.reflect.Type; |
| |
| /** |
| * Core methods that define a {@link Queryable}. |
| * |
| * <p>The other methods in {@link Queryable}, defined in |
| * {@link ExtendedQueryable}, can easily be implemented by calling the |
| * corresponding static methods in {@link Extensions}. |
| * |
| * @param <T> Element type |
| */ |
| public interface RawQueryable<T> extends Enumerable<T> { |
| /** |
| * Gets the type of the element(s) that are returned when the expression |
| * tree associated with this Queryable is executed. |
| */ |
| Type getElementType(); |
| |
| /** |
| * Gets the expression tree that is associated with this Queryable. |
| */ |
| Expression getExpression(); |
| |
| /** |
| * Gets the query provider that is associated with this data source. |
| */ |
| QueryProvider getProvider(); |
| } |