| /* |
| * 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.cassandra.cql3.conditions; |
| |
| import java.util.List; |
| |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.cql3.functions.Function; |
| import org.apache.cassandra.cql3.statements.CQL3CasRequest; |
| import org.apache.cassandra.db.Clustering; |
| import org.apache.cassandra.schema.ColumnMetadata; |
| |
| /** |
| * Conditions that can be applied to a mutation statement. |
| * |
| */ |
| public interface Conditions |
| { |
| /** |
| * An EMPTY condition |
| */ |
| static final Conditions EMPTY_CONDITION = ColumnConditions.newBuilder().build(); |
| |
| /** |
| * IF EXISTS condition |
| */ |
| static final Conditions IF_EXISTS_CONDITION = new IfExistsCondition(); |
| |
| /** |
| * IF NOT EXISTS condition |
| */ |
| static final Conditions IF_NOT_EXISTS_CONDITION = new IfNotExistsCondition(); |
| |
| /** |
| * Adds the functions used by the conditions to the specified list. |
| * @param functions the list to add to |
| */ |
| void addFunctionsTo(List<Function> functions); |
| |
| /** |
| * Returns the column definitions to which apply the conditions. |
| * @return the column definitions to which apply the conditions. |
| */ |
| Iterable<ColumnMetadata> getColumns(); |
| |
| /** |
| * Checks if this <code>Conditions</code> is empty. |
| * @return <code>true</code> if this <code>Conditions</code> is empty, <code>false</code> otherwise. |
| */ |
| boolean isEmpty(); |
| |
| /** |
| * Checks if this is a IF EXIST condition. |
| * @return <code>true</code> if this is a IF EXIST condition, <code>false</code> otherwise. |
| */ |
| boolean isIfExists(); |
| |
| /** |
| * Checks if this is a IF NOT EXIST condition. |
| * @return <code>true</code> if this is a IF NOT EXIST condition, <code>false</code> otherwise. |
| */ |
| boolean isIfNotExists(); |
| |
| /** |
| * Checks if some of the conditions apply to static columns. |
| * |
| * @return <code>true</code> if some of the conditions apply to static columns, <code>false</code> otherwise. |
| */ |
| boolean appliesToStaticColumns(); |
| |
| /** |
| * Checks if some of the conditions apply to regular columns. |
| * |
| * @return <code>true</code> if some of the conditions apply to regular columns, <code>false</code> otherwise. |
| */ |
| boolean appliesToRegularColumns(); |
| |
| /** |
| * Adds the conditions to the specified CAS request. |
| * |
| * @param request the request |
| * @param clustering the clustering prefix |
| * @param options the query options |
| */ |
| public void addConditionsTo(CQL3CasRequest request, |
| Clustering<?> clustering, |
| QueryOptions options); |
| } |