Commons DBCP example source code file (TestDelegatingCallableStatement.java)

This example Commons DBCP source code file (TestDelegatingCallableStatement.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

callablestatement, connection, delegatingcallablestatement, delegatingcallablestatement, delegatingconnection, delegatingstatement, exception, exception, jdbc, sql, testcase, testdelegatingcallablestatement, testdelegatingcallablestatement, testercallablestatement, testercallablestatement, testerconnection

The Commons DBCP TestDelegatingCallableStatement.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.CallableStatement;
import java.sql.Connection;

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

/**
 * @version $Revision: 896721 $ $Date: 2010-01-06 18:50:53 -0500 (Wed, 06 Jan 2010) $
 */
public class TestDelegatingCallableStatement extends TestCase {
    public TestDelegatingCallableStatement(String testName) {
        super(testName);
    }

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

    private DelegatingConnection conn = null;
    private Connection delegateConn = null;
    private DelegatingCallableStatement stmt = null;
    private CallableStatement delegateStmt = null;

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

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

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

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

    public void testHashCodeNull() {
        stmt = new DelegatingCallableStatement(conn, null);
        assertEquals(0, stmt.hashCode());
    }
    
    public void testHashCode() {
        delegateStmt = new TesterCallableStatement(delegateConn,"select * from foo");
        DelegatingCallableStatement stmt1 = new DelegatingCallableStatement(conn,delegateStmt);
        DelegatingCallableStatement stmt2 = new DelegatingCallableStatement(conn,delegateStmt);
        assertEquals(stmt1.hashCode(), stmt2.hashCode());
    }
    
    public void testEquals() {
        delegateStmt = new TesterCallableStatement(delegateConn,"select * from foo");
        CallableStatement del = new TesterCallableStatement(delegateConn,"select * from foo");
        DelegatingCallableStatement stmt1 = new DelegatingCallableStatement(conn, delegateStmt);
        DelegatingCallableStatement stmt2 = new DelegatingCallableStatement(conn, delegateStmt);
        DelegatingCallableStatement stmt3 = new DelegatingCallableStatement(conn, null);
        DelegatingCallableStatement stmt4 = new DelegatingCallableStatement(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

    }

}