org.springframework.jdbc.support.nativejdbc.JBossNativeJdbcExtractor Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.springframework.util.ReflectionUtils;
/**
* Implementation of the NativeJdbcExtractor interface for JBoss 3.2.4+.
*
* Returns the underlying native Connection, Statement, etc to
* application code instead of JBoss' wrapper implementations.
* The returned JDBC classes can then safely be cast, e.g. to
* oracle.jdbc.OracleConnection.
*
*
This NativeJdbcExtractor can be set just to allow working with
* a JBoss connection pool: If a given object is not a JBoss wrapper,
* it will be returned as-is.
*
* @author Juergen Hoeller
* @since 03.01.2004
* @see org.jboss.resource.adapter.jdbc.WrappedConnection#getUnderlyingConnection
* @see org.jboss.resource.adapter.jdbc.WrappedStatement#getUnderlyingStatement
* @see org.jboss.resource.adapter.jdbc.WrappedResultSet#getUnderlyingResultSet
*/
public class JBossNativeJdbcExtractor extends NativeJdbcExtractorAdapter {
private static final String WRAPPED_CONNECTION_NAME = "org.jboss.resource.adapter.jdbc.WrappedConnection";
private static final String WRAPPED_STATEMENT_NAME = "org.jboss.resource.adapter.jdbc.WrappedStatement";
private static final String WRAPPED_RESULT_SET_NAME = "org.jboss.resource.adapter.jdbc.WrappedResultSet";
private Class wrappedConnectionClass;
private Class wrappedStatementClass;
private Class wrappedResultSetClass;
private Method getUnderlyingConnectionMethod;
private Method getUnderlyingStatementMethod;
private Method getUnderlyingResultSetMethod;
/**
* This constructor retrieves JBoss JDBC wrapper classes,
* so we can get the underlying vendor connection using reflection.
*/
public JBossNativeJdbcExtractor() {
try {
this.wrappedConnectionClass = getClass().getClassLoader().loadClass(WRAPPED_CONNECTION_NAME);
this.wrappedStatementClass = getClass().getClassLoader().loadClass(WRAPPED_STATEMENT_NAME);
this.wrappedResultSetClass = getClass().getClassLoader().loadClass(WRAPPED_RESULT_SET_NAME);
this.getUnderlyingConnectionMethod =
this.wrappedConnectionClass.getMethod("getUnderlyingConnection", (Class[]) null);
this.getUnderlyingStatementMethod =
this.wrappedStatementClass.getMethod("getUnderlyingStatement", (Class[]) null);
this.getUnderlyingResultSetMethod =
this.wrappedResultSetClass.getMethod("getUnderlyingResultSet", (Class[]) null);
}
catch (Exception ex) {
throw new IllegalStateException(
"Could not initialize JBossNativeJdbcExtractor because JBoss API classes are not available: " + ex);
}
}
/**
* Retrieve the Connection via JBoss' getUnderlyingConnection method.
*/
protected Connection doGetNativeConnection(Connection con) throws SQLException {
if (this.wrappedConnectionClass.isAssignableFrom(con.getClass())) {
return (Connection) ReflectionUtils.invokeMethod(this.getUnderlyingConnectionMethod, con);
}
return con;
}
/**
* Retrieve the Connection via JBoss' getUnderlyingStatement method.
*/
public Statement getNativeStatement(Statement stmt) throws SQLException {
if (this.wrappedStatementClass.isAssignableFrom(stmt.getClass())) {
return (Statement) ReflectionUtils.invokeMethod(this.getUnderlyingStatementMethod, stmt);
}
return stmt;
}
/**
* Retrieve the Connection via JBoss' getUnderlyingStatement method.
*/
public PreparedStatement getNativePreparedStatement(PreparedStatement ps) throws SQLException {
return (PreparedStatement) getNativeStatement(ps);
}
/**
* Retrieve the Connection via JBoss' getUnderlyingStatement method.
*/
public CallableStatement getNativeCallableStatement(CallableStatement cs) throws SQLException {
return (CallableStatement) getNativeStatement(cs);
}
/**
* Retrieve the Connection via JBoss' getUnderlyingResultSet method.
*/
public ResultSet getNativeResultSet(ResultSet rs) throws SQLException {
if (this.wrappedResultSetClass.isAssignableFrom(rs.getClass())) {
return (ResultSet) ReflectionUtils.invokeMethod(this.getUnderlyingResultSetMethod, rs);
}
return rs;
}
}