| /* |
| * 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.openjpa.lib.jdbc; |
| |
| import java.sql.Connection; |
| import java.sql.SQLException; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| import javax.sql.DataSource; |
| |
| /** |
| * Delegating data source that maintains a list of {@link ConnectionDecorator}s. |
| * |
| * @author Abe White |
| */ |
| public class DecoratingDataSource extends DelegatingDataSource { |
| |
| private List<ConnectionDecorator> _decorators = |
| new CopyOnWriteArrayList<ConnectionDecorator>(); |
| |
| /** |
| * Constructor. Supply wrapped data source. |
| */ |
| public DecoratingDataSource(DataSource ds) { |
| super(ds); |
| } |
| |
| /** |
| * Return a read-only list of connection decorators in the order they were |
| * added. |
| */ |
| public Collection<ConnectionDecorator> getDecorators() { |
| return Collections.unmodifiableCollection(_decorators); |
| } |
| |
| /** |
| * Add a connection decorator. |
| */ |
| public void addDecorator(ConnectionDecorator decorator) { |
| if (decorator != null) |
| _decorators.add(decorator); |
| } |
| |
| /** |
| * Add multiple connection decorators efficiently. |
| */ |
| public void addDecorators(Collection<ConnectionDecorator> decorators) { |
| if (decorators != null) |
| _decorators.addAll(decorators); |
| } |
| |
| /** |
| * Remove a connection decorator. |
| */ |
| public boolean removeDecorator(ConnectionDecorator decorator) { |
| return _decorators.remove(decorator); |
| } |
| |
| /** |
| * Clear all decorators. |
| */ |
| public void clearDecorators() { |
| _decorators.clear(); |
| } |
| |
| public Connection getConnection() throws SQLException { |
| Connection conn = super.getConnection(); |
| return decorate(conn); |
| } |
| |
| public Connection getConnection(String user, String pass) |
| throws SQLException { |
| Connection conn = super.getConnection(user, pass); |
| return decorate(conn); |
| } |
| |
| private Connection decorate(Connection conn) throws SQLException { |
| for(ConnectionDecorator decorator : _decorators) { |
| conn = decorator.decorate(conn); |
| } |
| return conn; |
| } |
| } |