| /* |
| * 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.db.virtual; |
| |
| import org.apache.cassandra.db.DataRange; |
| import org.apache.cassandra.db.DecoratedKey; |
| import org.apache.cassandra.db.filter.ClusteringIndexFilter; |
| import org.apache.cassandra.db.filter.ColumnFilter; |
| import org.apache.cassandra.db.partitions.PartitionUpdate; |
| import org.apache.cassandra.db.partitions.UnfilteredPartitionIterator; |
| import org.apache.cassandra.schema.TableMetadata; |
| |
| /** |
| * A system view used to expose system information. |
| */ |
| public interface VirtualTable |
| { |
| /** |
| * Returns the view name. |
| * |
| * @return the view name. |
| */ |
| default String name() |
| { |
| return metadata().name; |
| } |
| |
| /** |
| * Returns the view metadata. |
| * |
| * @return the view metadata. |
| */ |
| TableMetadata metadata(); |
| |
| /** |
| * Applies the specified update. |
| * @param update the update to apply |
| */ |
| void apply(PartitionUpdate update); |
| |
| /** |
| * Selects the rows from a single partition. |
| * |
| * @param partitionKey the partition key |
| * @param clusteringIndexFilter the clustering columns to selected |
| * @param columnFilter the selected columns |
| * @return the rows corresponding to the requested data. |
| */ |
| UnfilteredPartitionIterator select(DecoratedKey partitionKey, ClusteringIndexFilter clusteringIndexFilter, ColumnFilter columnFilter); |
| |
| /** |
| * Selects the rows from a range of partitions. |
| * |
| * @param dataRange the range of data to retrieve |
| * @param columnFilter the selected columns |
| * @return the rows corresponding to the requested data. |
| */ |
| UnfilteredPartitionIterator select(DataRange dataRange, ColumnFilter columnFilter); |
| } |