Commons DBCP example source code file (TestDelegatingPreparedStatement.java)

This example Commons DBCP source code file (TestDelegatingPreparedStatement.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons DBCP tags/keywords

connection, delegatingconnection, delegatingpreparedstatement, delegatingpreparedstatement, delegatingstatement, exception, exception, jdbc, preparedstatement, preparedstatement, sql, testcase, testdelegatingpreparedstatement, testerconnection, testerpreparedstatement, testerpreparedstatement

The Commons DBCP TestDelegatingPreparedStatement.java source code

/*
 * 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.commons.dbcp;

import java.sql.Connection;
import java.sql.PreparedStatement;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

/**
 * @author Rodney Waldhoff
 * @author Dirk Verbeeck
 * @version $Revision: 896720 $ $Date: 2010-01-06 18:43:07 -0500 (Wed, 06 Jan 2010) $
 */
public class TestDelegatingPreparedStatement extends TestCase {
    public TestDelegatingPreparedStatement(String testName) {
        super(testName);
    }

    public static Test suite() {
        return new TestSuite(TestDelegatingPreparedStatement.class);
    }

    private DelegatingConnection conn = null;
    private Connection delegateConn = null;
    private DelegatingPreparedStatement stmt = null;
    private PreparedStatement delegateStmt = null;

    public void setUp() throws Exception {
        delegateConn = new TesterConnection("test", "test");
        conn = new DelegatingConnection(delegateConn);
    }

    public void testExecuteQueryReturnsNull() throws Exception {
        delegateStmt = new TesterPreparedStatement(delegateConn,"null");
        stmt = new DelegatingPreparedStatement(conn,delegateStmt);
        assertNull(stmt.executeQuery());
    }

    public void testExecuteQueryReturnsNotNull() throws Exception {
        delegateStmt = new TesterPreparedStatement(delegateConn,"select * from foo");
        stmt = new DelegatingPreparedStatement(conn,delegateStmt);
        assertTrue(null != stmt.executeQuery());
    }

    public void testGetDelegate() throws Exception {
        delegateStmt = new TesterPreparedStatement(delegateConn,"select * from foo");
        stmt = new DelegatingPreparedStatement(conn,delegateStmt);
        assertEquals(delegateStmt,stmt.getDelegate());
    }

    public void testHashCodeNull() {
        stmt = new DelegatingPreparedStatement(conn, null);
        assertEquals(0, stmt.hashCode());
    }
    
    public void testHashCode() {
        delegateStmt = new TesterPreparedStatement(delegateConn,"select * from foo");
        DelegatingPreparedStatement stmt1 = new DelegatingPreparedStatement(conn,delegateStmt);
        DelegatingPreparedStatement stmt2 = new DelegatingPreparedStatement(conn,delegateStmt);
        assertEquals(stmt1.hashCode(), stmt2.hashCode());
    }
    
    public void testEquals() {
        delegateStmt = new TesterPreparedStatement(delegateConn,"select * from foo");
        PreparedStatement del = new TesterPreparedStatement(delegateConn,"select * from foo");
        DelegatingPreparedStatement stmt1 = new DelegatingPreparedStatement(conn, delegateStmt);
        DelegatingPreparedStatement stmt2 = new DelegatingPreparedStatement(conn, delegateStmt);
        DelegatingPreparedStatement stmt3 = new DelegatingPreparedStatement(conn, null);
        DelegatingPreparedStatement stmt4 = new DelegatingPreparedStatement(conn, del);
        
        // Nothing is equal to null
        assertFalse(stmt1.equals(null));
        assertFalse(stmt2.equals(null));
        assertFalse(stmt3.equals(null));
        assertFalse(stmt4.equals(null));
        
        // 1 & 2 are equivalent
        assertTrue(stmt1.equals(stmt2));
        assertTrue(stmt2.equals(stmt1)); // reflexive

        // 1 & 3 are not (different statements, one null)
        assertFalse(stmt1.equals(stmt3));
        assertFalse(stmt3.equals(stmt1)); // reflexive

        // 1 & 4 are not (different statements)
        assertFalse(stmt1.equals(stmt4));
        assertFalse(stmt4.equals(stmt1)); // reflexive

        // Check self-equals
        assertTrue(stmt1.equals(stmt1));
        assertTrue(stmt2.equals(stmt2));
        assertFalse(stmt3.equals(stmt3)); // because underlying statement is null
        assertTrue(stmt4.equals(stmt4));
        
        DelegatingStatement dstmt1 = stmt1;
        
        // 1 & 2 are equivalent
        assertTrue(dstmt1.equals(stmt2));
        assertTrue(stmt2.equals(dstmt1)); // reflexive

    }

}