/*
* #%L
* P6Spy
* %%
* Copyright (C) 2013 P6Spy
* %%
* Licensed 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.
* #L%
*/
package com.p6spy.engine.common;
import com.p6spy.engine.proxy.GenericInvocationHandler;
import com.p6spy.engine.proxy.ProxyFactory;
import com.p6spy.engine.test.AbstractTestConnection;
import com.p6spy.engine.test.BaseTestCase;
import com.p6spy.engine.test.TestConnection;
import com.p6spy.engine.test.TestConnectionImpl;
import org.apache.commons.dbcp.DelegatingConnection;
import org.junit.Test;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Wrapper;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public class P6WrapperUnwrapDelegateTest extends BaseTestCase {
@Test
public void testCastableFromProxy() throws SQLException {
Connection con = new TestConnectionImpl();
Connection proxy = ProxyFactory.createProxy(con, new GenericInvocationHandler<Connection>(con));
// if the proxy implements the interface then the proxy should be returned
{
Connection unwrapped = proxy.unwrap(Connection.class);
assertTrue(ProxyFactory.isProxy(unwrapped));
}
{
TestConnection unwrapped = proxy.unwrap(TestConnection.class);
assertTrue(ProxyFactory.isProxy(unwrapped));
}
{
Wrapper unwrapped = proxy.unwrap(Wrapper.class);
assertTrue(ProxyFactory.isProxy(unwrapped));
}
{
AutoCloseable unwrapped = proxy.unwrap(AutoCloseable.class);
assertTrue(ProxyFactory.isProxy(unwrapped));
}
// TestConnectionImpl is not implemented by the proxy - proxy will not be returned
{
TestConnectionImpl unwrapped = proxy.unwrap(TestConnectionImpl.class);
assertFalse(ProxyFactory.isProxy(unwrapped));
}
}
@Test
public void testCastableFromUnderlying() throws SQLException {
Connection con = new TestConnectionImpl();
Connection proxy = ProxyFactory.createProxy(con, new GenericInvocationHandler<Connection>(con));
// if the underlying object extends the class (or matches the class) then the underlying object should be returned.
{
AbstractTestConnection unwrapped = proxy.unwrap(AbstractTestConnection.class);
assertFalse(ProxyFactory.isProxy(unwrapped));
}
{
TestConnectionImpl unwrapped = proxy.unwrap(TestConnectionImpl.class);
assertFalse(ProxyFactory.isProxy(unwrapped));
}
}
@Test
public void testProxyOfWrappedConnection() throws SQLException {
// this will be the actual connection
Connection con = new TestConnectionImpl();
// use a wrapper from DBCP to create a proxy of a proxy
// Note: DBCP implements with JDBC 4.0 API so the Wrapper interface
// is implemented here.
DelegatingConnection underlying = new DelegatingConnection(con);
Connection proxy = ProxyFactory.createProxy(underlying, new GenericInvocationHandler<Connection>(underlying));
// TestConnection is an interface of the actual connection but not of the proxy. Unwrapping works
// but a proxy is not returned
{
TestConnection unwrapped = proxy.unwrap(TestConnection.class);
assertFalse(ProxyFactory.isProxy(unwrapped));
}
// ResultSet is not implemented at all - an exception will be thrown
try {
proxy.unwrap(ResultSet.class);
fail("Expected exception not thrown");
} catch (SQLException e) {
}
}
}