| /* |
| * 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.beam.sdk.extensions.sql.meta.provider; |
| |
| import java.util.Map; |
| import org.apache.beam.sdk.extensions.sql.meta.BeamSqlTable; |
| import org.apache.beam.sdk.extensions.sql.meta.Table; |
| import org.apache.beam.sdk.schemas.Schema; |
| import org.apache.beam.vendor.calcite.v1_20_0.com.google.common.collect.ImmutableMap; |
| |
| /** |
| * A {@code ReadOnlyTableProvider} provides in-memory read only set of {@code BeamSqlTable |
| * BeamSqlTables}. |
| */ |
| public class ReadOnlyTableProvider implements TableProvider { |
| private final String typeName; |
| private final Map<String, BeamSqlTable> tables; |
| |
| public ReadOnlyTableProvider(String typeName, Map<String, BeamSqlTable> tables) { |
| this.typeName = typeName; |
| this.tables = tables; |
| } |
| |
| @Override |
| public String getTableType() { |
| return typeName; |
| } |
| |
| @Override |
| public void createTable(Table table) { |
| throw new UnsupportedOperationException( |
| "ReadOnlyTableProvider does not support table creation"); |
| } |
| |
| @Override |
| public void dropTable(String tableName) { |
| throw new UnsupportedOperationException( |
| "ReadOnlyTableProvider does not support table deletion"); |
| } |
| |
| @Override |
| public Map<String, Table> getTables() { |
| ImmutableMap.Builder<String, Table> map = ImmutableMap.builder(); |
| for (Map.Entry<String, BeamSqlTable> table : tables.entrySet()) { |
| map.put( |
| table.getKey(), |
| Table.builder() |
| .type(getTableType()) |
| .name(table.getKey()) |
| .schema(Schema.builder().build()) |
| .build()); |
| } |
| return map.build(); |
| } |
| |
| @Override |
| public BeamSqlTable buildBeamSqlTable(Table table) { |
| return tables.get(table.getName()); |
| } |
| } |