Spring Framework example source code file (WebSphereNativeJdbcExtractor.java)

This example Spring Framework source code file (WebSphereNativeJdbcExtractor.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 - Spring Framework tags/keywords

class, class, connection, connection, illegalstateexception, jdbc, jdbc_adapter_util_name_5, nativejdbcextractoradapter, object, reflection, sql, sqlexception, string, string, websphere, webspherenativejdbcextractor, webspherenativejdbcextractor

The Spring Framework WebSphereNativeJdbcExtractor.java source code

/*
 * Copyright 2002-2008 the original author or authors.
 *
 * 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.
 */

package org.springframework.jdbc.support.nativejdbc;

import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.SQLException;

import org.springframework.util.ReflectionUtils;

/**
 * Implementation of the {@link NativeJdbcExtractor} interface for WebSphere,
 * supporting WebSphere Application Server 5.1 and higher.
 *
 * <p>Returns the underlying native Connection to application code instead
 * of WebSphere's wrapper implementation; unwraps the Connection for
 * native statements. The returned JDBC classes can then safely be cast,
 * e.g. to <code>oracle.jdbc.OracleConnection.
 *
 * <p>This NativeJdbcExtractor can be set just to allow working
 * with a WebSphere DataSource: If a given object is not a WebSphere
 * Connection wrapper, it will be returned as-is.
 *
 * @author Juergen Hoeller
 * @since 1.1
 * @see com.ibm.ws.rsadapter.jdbc.WSJdbcConnection
 * @see com.ibm.ws.rsadapter.jdbc.WSJdbcUtil#getNativeConnection
 */
public class WebSphereNativeJdbcExtractor extends NativeJdbcExtractorAdapter {

	private static final String JDBC_ADAPTER_CONNECTION_NAME_5 = "com.ibm.ws.rsadapter.jdbc.WSJdbcConnection";

	private static final String JDBC_ADAPTER_UTIL_NAME_5 = "com.ibm.ws.rsadapter.jdbc.WSJdbcUtil";


	private Class webSphere5ConnectionClass;

	private Method webSphere5NativeConnectionMethod;


	/**
	 * This constructor retrieves WebSphere JDBC adapter classes,
	 * so we can get the underlying vendor connection using reflection.
	 */
	public WebSphereNativeJdbcExtractor() {
		try {
			this.webSphere5ConnectionClass = getClass().getClassLoader().loadClass(JDBC_ADAPTER_CONNECTION_NAME_5);
			Class jdbcAdapterUtilClass = getClass().getClassLoader().loadClass(JDBC_ADAPTER_UTIL_NAME_5);
			this.webSphere5NativeConnectionMethod =
					jdbcAdapterUtilClass.getMethod("getNativeConnection", new Class[] {this.webSphere5ConnectionClass});
		}
		catch (Exception ex) {
			throw new IllegalStateException(
					"Could not initialize WebSphereNativeJdbcExtractor because WebSphere API classes are not available: " + ex);
		}
	}


	/**
	 * Return <code>true, as WebSphere returns wrapped Statements.
	 */
	public boolean isNativeConnectionNecessaryForNativeStatements() {
		return true;
	}

	/**
	 * Return <code>true, as WebSphere returns wrapped PreparedStatements.
	 */
	public boolean isNativeConnectionNecessaryForNativePreparedStatements() {
		return true;
	}

	/**
	 * Return <code>true, as WebSphere returns wrapped CallableStatements.
	 */
	public boolean isNativeConnectionNecessaryForNativeCallableStatements() {
		return true;
	}

	/**
	 * Retrieve the Connection via WebSphere's <code>getNativeConnection method.
	 */
	protected Connection doGetNativeConnection(Connection con) throws SQLException {
		if (this.webSphere5ConnectionClass.isAssignableFrom(con.getClass())) {
			return (Connection) ReflectionUtils.invokeJdbcMethod(
					this.webSphere5NativeConnectionMethod, null, new Object[] {con});
		}
		return con;
	}

}