| /** |
| * 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.metamodel.membrane.app.registry.memory; |
| |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.function.Supplier; |
| import java.util.stream.Collectors; |
| |
| import org.apache.metamodel.DataContext; |
| import org.apache.metamodel.factory.DataContextProperties; |
| import org.apache.metamodel.membrane.app.DataContextSupplier; |
| import org.apache.metamodel.membrane.app.exceptions.DataSourceAlreadyExistException; |
| import org.apache.metamodel.membrane.app.exceptions.NoSuchDataSourceException; |
| import org.apache.metamodel.membrane.app.registry.DataSourceRegistry; |
| |
| public class InMemoryDataSourceRegistry implements DataSourceRegistry { |
| |
| private final Map<String, Supplier<DataContext>> dataSources; |
| |
| public InMemoryDataSourceRegistry() { |
| dataSources = new LinkedHashMap<>(); |
| } |
| |
| @Override |
| public String registerDataSource(final String name, final DataContextProperties dataContextProperties) |
| throws DataSourceAlreadyExistException { |
| if (dataSources.containsKey(name)) { |
| throw new DataSourceAlreadyExistException(name); |
| } |
| |
| dataSources.put(name, new DataContextSupplier(name, dataContextProperties)); |
| return name; |
| } |
| |
| @Override |
| public List<String> getDataSourceNames() { |
| return dataSources.keySet().stream().collect(Collectors.toList()); |
| } |
| |
| @Override |
| public DataContext openDataContext(String name) { |
| final Supplier<DataContext> supplier = dataSources.get(name); |
| if (supplier == null) { |
| throw new NoSuchDataSourceException(name); |
| } |
| return supplier.get(); |
| } |
| |
| @Override |
| public void removeDataSource(String dataSourceName) throws NoSuchDataSourceException { |
| if (!dataSources.containsKey(dataSourceName)) { |
| throw new NoSuchDataSourceException(dataSourceName); |
| } |
| dataSources.remove(dataSourceName); |
| } |
| |
| public DataContext openDataContext(DataContextProperties properties) { |
| final DataContextSupplier supplier = new DataContextSupplier(null, properties); |
| return supplier.get(); |
| } |
| } |