/*
    * Copyright 2002-2014 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.core;
  
  import java.lang.reflect.InvocationHandler;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.lang.reflect.Proxy;
  import java.sql.BatchUpdateException;
  import java.sql.CallableStatement;
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.sql.SQLWarning;
  import java.sql.Statement;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  import javax.sql.DataSource;
  
  import org.springframework.dao.DataAccessException;
  import org.springframework.dao.InvalidDataAccessApiUsageException;
  import org.springframework.dao.support.DataAccessUtils;
  import org.springframework.jdbc.SQLWarningException;
  import org.springframework.jdbc.datasource.ConnectionProxy;
  import org.springframework.jdbc.datasource.DataSourceUtils;
  import org.springframework.jdbc.support.JdbcAccessor;
  import org.springframework.jdbc.support.JdbcUtils;
  import org.springframework.jdbc.support.KeyHolder;
  import org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractor;
  import org.springframework.jdbc.support.rowset.SqlRowSet;
  import org.springframework.util.Assert;
  import org.springframework.util.LinkedCaseInsensitiveMap;
  import org.springframework.util.StringUtils;
  
  /**
   * <b>This is the central class in the JDBC core package.</b>
   * It simplifies the use of JDBC and helps to avoid common errors.
   * It executes core JDBC workflow, leaving application code to provide SQL
   * and extract results. This class executes SQL queries or updates, initiating
   * iteration over ResultSets and catching JDBC exceptions and translating
   * them to the generic, more informative exception hierarchy defined in the
   * {@code org.springframework.dao} package.
   *
   * <p>Code using this class need only implement callback interfaces, giving
   * them a clearly defined contract. The {@link PreparedStatementCreator} callback
   * interface creates a prepared statement given a Connection, providing SQL and
   * any necessary parameters. The {@link ResultSetExtractor} interface extracts
   * values from a ResultSet. See also {@link PreparedStatementSetter} and
   * {@link RowMapper} for two popular alternative callback interfaces.
   *
   * <p>Can be used within a service implementation via direct instantiation
   * with a DataSource reference, or get prepared in an application context
   * and given to services as bean reference. Note: The DataSource should
   * always be configured as a bean in the application context, in the first case
   * given to the service directly, in the second case to the prepared template.
   *
   * <p>Because this class is parameterizable by the callback interfaces and
   * the {@link org.springframework.jdbc.support.SQLExceptionTranslator}
   * interface, there should be no need to subclass it.
   *
   * <p>All SQL operations performed by this class are logged at debug level,
   * using "org.springframework.jdbc.core.JdbcTemplate" as log category.
   *
   * <p><b>NOTE: An instance of this class is thread-safe once configured.</b>
   *
   * @author Rod Johnson
   * @author Juergen Hoeller
   * @author Thomas Risberg
   * @since May 3, 2001
   * @see PreparedStatementCreator
   * @see PreparedStatementSetter
   * @see CallableStatementCreator
   * @see PreparedStatementCallback
   * @see CallableStatementCallback
   * @see ResultSetExtractor
   * @see RowCallbackHandler
   * @see RowMapper
   * @see org.springframework.jdbc.support.SQLExceptionTranslator
   */
 public class JdbcTemplate extends JdbcAccessor implements JdbcOperations {
 
 	private static final String RETURN_RESULT_SET_PREFIX = "#result-set-";
 
 	private static final String RETURN_UPDATE_COUNT_PREFIX = "#update-count-";
 
 
 	/** Custom NativeJdbcExtractor */
 	private NativeJdbcExtractor nativeJdbcExtractor;
 
 	/** If this variable is false, we will throw exceptions on SQL warnings */
 	private boolean ignoreWarnings = true;
 
 	/**
 	 * If this variable is set to a non-negative value, it will be used for setting the
 	 * fetchSize property on statements used for query processing.
 	 */
 	private int fetchSize = -1;
 
 	/**
 	 * If this variable is set to a non-negative value, it will be used for setting the
 	 * maxRows property on statements used for query processing.
 	 */
 	private int maxRows = -1;
 
 	/**
 	 * If this variable is set to a non-negative value, it will be used for setting the
 	 * queryTimeout property on statements used for query processing.
 	 */
 	private int queryTimeout = -1;
 
 	/**
 	 * If this variable is set to true then all results checking will be bypassed for any
 	 * callable statement processing.  This can be used to avoid a bug in some older Oracle
 	 * JDBC drivers like 10.1.0.2.
 	 */
 	private boolean skipResultsProcessing = false;
 
 	/**
 	 * If this variable is set to true then all results from a stored procedure call
 	 * that don't have a corresponding SqlOutParameter declaration will be bypassed.
 	 * All other results processing will be take place unless the variable
 	 * {@code skipResultsProcessing} is set to {@code true}.
 	 */
 	private boolean skipUndeclaredResults = false;
 
 	/**
 	 * If this variable is set to true then execution of a CallableStatement will return
 	 * the results in a Map that uses case insensitive names for the parameters if
 	 * Commons Collections is available on the classpath.
 	 */
 	private boolean resultsMapCaseInsensitive = false;
 
 
 	/**
 	 * Construct a new JdbcTemplate for bean usage.
 	 * <p>Note: The DataSource has to be set before using the instance.
 	 * @see #setDataSource
 	 */
 	public JdbcTemplate() {
 	}
 
 	/**
 	 * Construct a new JdbcTemplate, given a DataSource to obtain connections from.
 	 * <p>Note: This will not trigger initialization of the exception translator.
 	 * @param dataSource the JDBC DataSource to obtain connections from
 	 */
 	public JdbcTemplate(DataSource dataSource) {
 		setDataSource(dataSource);
 		afterPropertiesSet();
 	}
 
 	/**
 	 * Construct a new JdbcTemplate, given a DataSource to obtain connections from.
 	 * <p>Note: Depending on the "lazyInit" flag, initialization of the exception translator
 	 * will be triggered.
 	 * @param dataSource the JDBC DataSource to obtain connections from
 	 * @param lazyInit whether to lazily initialize the SQLExceptionTranslator
 	 */
 	public JdbcTemplate(DataSource dataSource, boolean lazyInit) {
 		setDataSource(dataSource);
 		setLazyInit(lazyInit);
 		afterPropertiesSet();
 	}
 
 
 	/**
 	 * Set a NativeJdbcExtractor to extract native JDBC objects from wrapped handles.
 	 * Useful if native Statement and/or ResultSet handles are expected for casting
 	 * to database-specific implementation classes, but a connection pool that wraps
 	 * JDBC objects is used (note: <i>any</i> pool will return wrapped Connections).
 	 */
 	public void setNativeJdbcExtractor(NativeJdbcExtractor extractor) {
 		this.nativeJdbcExtractor = extractor;
 	}
 
 	/**
 	 * Return the current NativeJdbcExtractor implementation.
 	 */
 	public NativeJdbcExtractor getNativeJdbcExtractor() {
 		return this.nativeJdbcExtractor;
 	}
 
 	/**
 	 * Set whether or not we want to ignore SQLWarnings.
 	 * <p>Default is "true", swallowing and logging all warnings. Switch this flag
 	 * to "false" to make the JdbcTemplate throw a SQLWarningException instead.
 	 * @see java.sql.SQLWarning
 	 * @see org.springframework.jdbc.SQLWarningException
 	 * @see #handleWarnings
 	 */
 	public void setIgnoreWarnings(boolean ignoreWarnings) {
 		this.ignoreWarnings = ignoreWarnings;
 	}
 
 	/**
 	 * Return whether or not we ignore SQLWarnings.
 	 */
 	public boolean isIgnoreWarnings() {
 		return this.ignoreWarnings;
 	}
 
 	/**
 	 * Set the fetch size for this JdbcTemplate. This is important for processing
 	 * large result sets: Setting this higher than the default value will increase
 	 * processing speed at the cost of memory consumption; setting this lower can
 	 * avoid transferring row data that will never be read by the application.
 	 * <p>Default is -1, indicating to use the JDBC driver's default
 	 * (i.e. to not pass a specific fetch size setting on the driver).
 	 * @see java.sql.Statement#setFetchSize
 	 */
 	public void setFetchSize(int fetchSize) {
 		this.fetchSize = fetchSize;
 	}
 
 	/**
 	 * Return the fetch size specified for this JdbcTemplate.
 	 */
 	public int getFetchSize() {
 		return this.fetchSize;
 	}
 
 	/**
 	 * Set the maximum number of rows for this JdbcTemplate. This is important
 	 * for processing subsets of large result sets, avoiding to read and hold
 	 * the entire result set in the database or in the JDBC driver if we're
 	 * never interested in the entire result in the first place (for example,
 	 * when performing searches that might return a large number of matches).
 	 * <p>Default is -1, indicating to use the JDBC driver's default
 	 * (i.e. to not pass a specific max rows setting on the driver).
 	 * @see java.sql.Statement#setMaxRows
 	 */
 	public void setMaxRows(int maxRows) {
 		this.maxRows = maxRows;
 	}
 
 	/**
 	 * Return the maximum number of rows specified for this JdbcTemplate.
 	 */
 	public int getMaxRows() {
 		return this.maxRows;
 	}
 
 	/**
 	 * Set the query timeout for statements that this JdbcTemplate executes.
 	 * <p>Default is -1, indicating to use the JDBC driver's default
 	 * (i.e. to not pass a specific query timeout setting on the driver).
 	 * <p>Note: Any timeout specified here will be overridden by the remaining
 	 * transaction timeout when executing within a transaction that has a
 	 * timeout specified at the transaction level.
 	 * @see java.sql.Statement#setQueryTimeout
 	 */
 	public void setQueryTimeout(int queryTimeout) {
 		this.queryTimeout = queryTimeout;
 	}
 
 	/**
 	 * Return the query timeout for statements that this JdbcTemplate executes.
 	 */
 	public int getQueryTimeout() {
 		return this.queryTimeout;
 	}
 
 	/**
 	 * Set whether results processing should be skipped. Can be used to optimize callable
 	 * statement processing when we know that no results are being passed back - the processing
 	 * of out parameter will still take place. This can be used to avoid a bug in some older
 	 * Oracle JDBC drivers like 10.1.0.2.
 	 */
 	public void setSkipResultsProcessing(boolean skipResultsProcessing) {
 		this.skipResultsProcessing = skipResultsProcessing;
 	}
 
 	/**
 	 * Return whether results processing should be skipped.
 	 */
 	public boolean isSkipResultsProcessing() {
 		return this.skipResultsProcessing;
 	}
 
 	/**
 	 * Set whether undeclared results should be skipped.
 	 */
 	public void setSkipUndeclaredResults(boolean skipUndeclaredResults) {
 		this.skipUndeclaredResults = skipUndeclaredResults;
 	}
 
 	/**
 	 * Return whether undeclared results should be skipped.
 	 */
 	public boolean isSkipUndeclaredResults() {
 		return this.skipUndeclaredResults;
 	}
 
 	/**
 	 * Set whether execution of a CallableStatement will return the results in a Map
 	 * that uses case insensitive names for the parameters.
 	 */
 	public void setResultsMapCaseInsensitive(boolean resultsMapCaseInsensitive) {
 		this.resultsMapCaseInsensitive = resultsMapCaseInsensitive;
 	}
 
 	/**
 	 * Return whether execution of a CallableStatement will return the results in a Map
 	 * that uses case insensitive names for the parameters.
 	 */
 	public boolean isResultsMapCaseInsensitive() {
 		return this.resultsMapCaseInsensitive;
 	}
 
 
 	//-------------------------------------------------------------------------
 	// Methods dealing with a plain java.sql.Connection
 	//-------------------------------------------------------------------------
 
 	@Override
 	public <T> T execute(ConnectionCallback<T> action) throws DataAccessException {
 		Assert.notNull(action, "Callback object must not be null");
 
 		Connection con = DataSourceUtils.getConnection(getDataSource());
 		try {
 			Connection conToUse = con;
 			if (this.nativeJdbcExtractor != null) {
 				// Extract native JDBC Connection, castable to OracleConnection or the like.
 				conToUse = this.nativeJdbcExtractor.getNativeConnection(con);
 			}
 			else {
 				// Create close-suppressing Connection proxy, also preparing returned Statements.
 				conToUse = createConnectionProxy(con);
 			}
 			return action.doInConnection(conToUse);
 		}
 		catch (SQLException ex) {
 			// Release Connection early, to avoid potential connection pool deadlock
 			// in the case when the exception translator hasn't been initialized yet.
 			DataSourceUtils.releaseConnection(con, getDataSource());
 			con = null;
 			throw getExceptionTranslator().translate("ConnectionCallback", getSql(action), ex);
 		}
 		finally {
 			DataSourceUtils.releaseConnection(con, getDataSource());
 		}
 	}
 
 	/**
 	 * Create a close-suppressing proxy for the given JDBC Connection.
 	 * Called by the {@code execute} method.
 	 * <p>The proxy also prepares returned JDBC Statements, applying
 	 * statement settings such as fetch size, max rows, and query timeout.
 	 * @param con the JDBC Connection to create a proxy for
 	 * @return the Connection proxy
 	 * @see java.sql.Connection#close()
 	 * @see #execute(ConnectionCallback)
 	 * @see #applyStatementSettings
 	 */
 	protected Connection createConnectionProxy(Connection con) {
 		return (Connection) Proxy.newProxyInstance(
 				ConnectionProxy.class.getClassLoader(),
 				new Class<?>[] {ConnectionProxy.class},
 				new CloseSuppressingInvocationHandler(con));
 	}
 
 
 	//-------------------------------------------------------------------------
 	// Methods dealing with static SQL (java.sql.Statement)
 	//-------------------------------------------------------------------------
 
 	@Override
 	public <T> T execute(StatementCallback<T> action) throws DataAccessException {
 		Assert.notNull(action, "Callback object must not be null");
 
 		Connection con = DataSourceUtils.getConnection(getDataSource());
 		Statement stmt = null;
 		try {
 			Connection conToUse = con;
 			if (this.nativeJdbcExtractor != null &&
 					this.nativeJdbcExtractor.isNativeConnectionNecessaryForNativeStatements()) {
 				conToUse = this.nativeJdbcExtractor.getNativeConnection(con);
 			}
 			stmt = conToUse.createStatement();
 			applyStatementSettings(stmt);
 			Statement stmtToUse = stmt;
 			if (this.nativeJdbcExtractor != null) {
 				stmtToUse = this.nativeJdbcExtractor.getNativeStatement(stmt);
 			}
 			T result = action.doInStatement(stmtToUse);
 			handleWarnings(stmt);
 			return result;
 		}
 		catch (SQLException ex) {
 			// Release Connection early, to avoid potential connection pool deadlock
 			// in the case when the exception translator hasn't been initialized yet.
 			JdbcUtils.closeStatement(stmt);
 			stmt = null;
 			DataSourceUtils.releaseConnection(con, getDataSource());
 			con = null;
 			throw getExceptionTranslator().translate("StatementCallback", getSql(action), ex);
 		}
 		finally {
 			JdbcUtils.closeStatement(stmt);
 			DataSourceUtils.releaseConnection(con, getDataSource());
 		}
 	}
 
 	@Override
 	public void execute(final String sql) throws DataAccessException {
 		if (logger.isDebugEnabled()) {
 			logger.debug("Executing SQL statement [" + sql + "]");
 		}
 		class ExecuteStatementCallback implements StatementCallback<Object>, SqlProvider {
 			@Override
 			public Object doInStatement(Statement stmt) throws SQLException {
 				stmt.execute(sql);
 				return null;
 			}
 			@Override
 			public String getSql() {
 				return sql;
 			}
 		}
 		execute(new ExecuteStatementCallback());
 	}
 
 	@Override
 	public <T> T query(final String sql, final ResultSetExtractor<T> rse) throws DataAccessException {
 		Assert.notNull(sql, "SQL must not be null");
 		Assert.notNull(rse, "ResultSetExtractor must not be null");
 		if (logger.isDebugEnabled()) {
 			logger.debug("Executing SQL query [" + sql + "]");
 		}
 		class QueryStatementCallback implements StatementCallback<T>, SqlProvider {
 			@Override
 			public T doInStatement(Statement stmt) throws SQLException {
 				ResultSet rs = null;
 				try {
 					rs = stmt.executeQuery(sql);
 					ResultSet rsToUse = rs;
 					if (nativeJdbcExtractor != null) {
 						rsToUse = nativeJdbcExtractor.getNativeResultSet(rs);
 					}
 					return rse.extractData(rsToUse);
 				}
 				finally {
 					JdbcUtils.closeResultSet(rs);
 				}
 			}
 			@Override
 			public String getSql() {
 				return sql;
 			}
 		}
 		return execute(new QueryStatementCallback());
 	}
 
 	@Override
 	public void query(String sql, RowCallbackHandler rch) throws DataAccessException {
 		query(sql, new RowCallbackHandlerResultSetExtractor(rch));
 	}
 
 	@Override
 	public <T> List<T> query(String sql, RowMapper<T> rowMapper) throws DataAccessException {
 		return query(sql, new RowMapperResultSetExtractor<T>(rowMapper));
 	}
 
 	@Override
 	public Map<String, Object> queryForMap(String sql) throws DataAccessException {
 		return queryForObject(sql, getColumnMapRowMapper());
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, RowMapper<T> rowMapper) throws DataAccessException {
 		List<T> results = query(sql, rowMapper);
 		return DataAccessUtils.requiredSingleResult(results);
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, Class<T> requiredType) throws DataAccessException {
 		return queryForObject(sql, getSingleColumnRowMapper(requiredType));
 	}
 
 	@Override
 	@Deprecated
 	public long queryForLong(String sql) throws DataAccessException {
 		Number number = queryForObject(sql, Long.class);
 		return (number != null ? number.longValue() : 0);
 	}
 
 	@Override
 	@Deprecated
 	public int queryForInt(String sql) throws DataAccessException {
 		Number number = queryForObject(sql, Integer.class);
 		return (number != null ? number.intValue() : 0);
 	}
 
 	@Override
 	public <T> List<T> queryForList(String sql, Class<T> elementType) throws DataAccessException {
 		return query(sql, getSingleColumnRowMapper(elementType));
 	}
 
 	@Override
 	public List<Map<String, Object>> queryForList(String sql) throws DataAccessException {
 		return query(sql, getColumnMapRowMapper());
 	}
 
 	@Override
 	public SqlRowSet queryForRowSet(String sql) throws DataAccessException {
 		return query(sql, new SqlRowSetResultSetExtractor());
 	}
 
 	@Override
 	public int update(final String sql) throws DataAccessException {
 		Assert.notNull(sql, "SQL must not be null");
 		if (logger.isDebugEnabled()) {
 			logger.debug("Executing SQL update [" + sql + "]");
 		}
 		class UpdateStatementCallback implements StatementCallback<Integer>, SqlProvider {
 			@Override
 			public Integer doInStatement(Statement stmt) throws SQLException {
 				int rows = stmt.executeUpdate(sql);
 				if (logger.isDebugEnabled()) {
 					logger.debug("SQL update affected " + rows + " rows");
 				}
 				return rows;
 			}
 			@Override
 			public String getSql() {
 				return sql;
 			}
 		}
 		return execute(new UpdateStatementCallback());
 	}
 
 	@Override
 	public int[] batchUpdate(final String... sql) throws DataAccessException {
 		Assert.notEmpty(sql, "SQL array must not be empty");
 		if (logger.isDebugEnabled()) {
 			logger.debug("Executing SQL batch update of " + sql.length + " statements");
 		}
 
 		class BatchUpdateStatementCallback implements StatementCallback<int[]>, SqlProvider {
 
 			private String currSql;
 
 			@Override
 			public int[] doInStatement(Statement stmt) throws SQLException, DataAccessException {
 				int[] rowsAffected = new int[sql.length];
 				if (JdbcUtils.supportsBatchUpdates(stmt.getConnection())) {
 					for (String sqlStmt : sql) {
 						this.currSql = appendSql(this.currSql, sqlStmt);
 						stmt.addBatch(sqlStmt);
 					}
 					try {
 						rowsAffected = stmt.executeBatch();
 					}
 					catch (BatchUpdateException ex) {
 						String batchExceptionSql = null;
 						for (int i = 0; i < ex.getUpdateCounts().length; i++) {
 							if (ex.getUpdateCounts()[i] == Statement.EXECUTE_FAILED) {
 								batchExceptionSql = appendSql(batchExceptionSql, sql[i]);
 							}
 						}
 						if (StringUtils.hasLength(batchExceptionSql)) {
 							this.currSql = batchExceptionSql;
 						}
 						throw ex;
 					}
 				}
 				else {
 					for (int i = 0; i < sql.length; i++) {
 						this.currSql = sql[i];
 						if (!stmt.execute(sql[i])) {
 							rowsAffected[i] = stmt.getUpdateCount();
 						}
 						else {
 							throw new InvalidDataAccessApiUsageException("Invalid batch SQL statement: " + sql[i]);
 						}
 					}
 				}
 				return rowsAffected;
 			}
 
 			private String appendSql(String sql, String statement) {
 				return (StringUtils.isEmpty(sql) ? statement : sql + "; " + statement);
 			}
 
 			@Override
 			public String getSql() {
 				return this.currSql;
 			}
 		}
 
 		return execute(new BatchUpdateStatementCallback());
 	}
 
 
 	//-------------------------------------------------------------------------
 	// Methods dealing with prepared statements
 	//-------------------------------------------------------------------------
 
 	@Override
 	public <T> T execute(PreparedStatementCreator psc, PreparedStatementCallback<T> action)
 			throws DataAccessException {
 
 		Assert.notNull(psc, "PreparedStatementCreator must not be null");
 		Assert.notNull(action, "Callback object must not be null");
 		if (logger.isDebugEnabled()) {
 			String sql = getSql(psc);
 			logger.debug("Executing prepared SQL statement" + (sql != null ? " [" + sql + "]" : ""));
 		}
 
 		Connection con = DataSourceUtils.getConnection(getDataSource());
 		PreparedStatement ps = null;
 		try {
 			Connection conToUse = con;
 			if (this.nativeJdbcExtractor != null &&
 					this.nativeJdbcExtractor.isNativeConnectionNecessaryForNativePreparedStatements()) {
 				conToUse = this.nativeJdbcExtractor.getNativeConnection(con);
 			}
 			ps = psc.createPreparedStatement(conToUse);
 			applyStatementSettings(ps);
 			PreparedStatement psToUse = ps;
 			if (this.nativeJdbcExtractor != null) {
 				psToUse = this.nativeJdbcExtractor.getNativePreparedStatement(ps);
 			}
 			T result = action.doInPreparedStatement(psToUse);
 			handleWarnings(ps);
 			return result;
 		}
 		catch (SQLException ex) {
 			// Release Connection early, to avoid potential connection pool deadlock
 			// in the case when the exception translator hasn't been initialized yet.
 			if (psc instanceof ParameterDisposer) {
 				((ParameterDisposer) psc).cleanupParameters();
 			}
 			String sql = getSql(psc);
 			psc = null;
 			JdbcUtils.closeStatement(ps);
 			ps = null;
 			DataSourceUtils.releaseConnection(con, getDataSource());
 			con = null;
 			throw getExceptionTranslator().translate("PreparedStatementCallback", sql, ex);
 		}
 		finally {
 			if (psc instanceof ParameterDisposer) {
 				((ParameterDisposer) psc).cleanupParameters();
 			}
 			JdbcUtils.closeStatement(ps);
 			DataSourceUtils.releaseConnection(con, getDataSource());
 		}
 	}
 
 	@Override
 	public <T> T execute(String sql, PreparedStatementCallback<T> action) throws DataAccessException {
 		return execute(new SimplePreparedStatementCreator(sql), action);
 	}
 
 	/**
 	 * Query using a prepared statement, allowing for a PreparedStatementCreator
 	 * and a PreparedStatementSetter. Most other query methods use this method,
 	 * but application code will always work with either a creator or a setter.
 	 * @param psc Callback handler that can create a PreparedStatement given a
 	 * Connection
 	 * @param pss object that knows how to set values on the prepared statement.
 	 * If this is null, the SQL will be assumed to contain no bind parameters.
 	 * @param rse object that will extract results.
 	 * @return an arbitrary result object, as returned by the ResultSetExtractor
 	 * @throws DataAccessException if there is any problem
 	 */
 	public <T> T query(
 			PreparedStatementCreator psc, final PreparedStatementSetter pss, final ResultSetExtractor<T> rse)
 			throws DataAccessException {
 
 		Assert.notNull(rse, "ResultSetExtractor must not be null");
 		logger.debug("Executing prepared SQL query");
 
 		return execute(psc, new PreparedStatementCallback<T>() {
 			@Override
 			public T doInPreparedStatement(PreparedStatement ps) throws SQLException {
 				ResultSet rs = null;
 				try {
 					if (pss != null) {
 						pss.setValues(ps);
 					}
 					rs = ps.executeQuery();
 					ResultSet rsToUse = rs;
 					if (nativeJdbcExtractor != null) {
 						rsToUse = nativeJdbcExtractor.getNativeResultSet(rs);
 					}
 					return rse.extractData(rsToUse);
 				}
 				finally {
 					JdbcUtils.closeResultSet(rs);
 					if (pss instanceof ParameterDisposer) {
 						((ParameterDisposer) pss).cleanupParameters();
 					}
 				}
 			}
 		});
 	}
 
 	@Override
 	public <T> T query(PreparedStatementCreator psc, ResultSetExtractor<T> rse) throws DataAccessException {
 		return query(psc, null, rse);
 	}
 
 	@Override
 	public <T> T query(String sql, PreparedStatementSetter pss, ResultSetExtractor<T> rse) throws DataAccessException {
 		return query(new SimplePreparedStatementCreator(sql), pss, rse);
 	}
 
 	@Override
 	public <T> T query(String sql, Object[] args, int[] argTypes, ResultSetExtractor<T> rse) throws DataAccessException {
 		return query(sql, newArgTypePreparedStatementSetter(args, argTypes), rse);
 	}
 
 	@Override
 	public <T> T query(String sql, Object[] args, ResultSetExtractor<T> rse) throws DataAccessException {
 		return query(sql, newArgPreparedStatementSetter(args), rse);
 	}
 
 	@Override
 	public <T> T query(String sql, ResultSetExtractor<T> rse, Object... args) throws DataAccessException {
 		return query(sql, newArgPreparedStatementSetter(args), rse);
 	}
 
 	@Override
 	public void query(PreparedStatementCreator psc, RowCallbackHandler rch) throws DataAccessException {
 		query(psc, new RowCallbackHandlerResultSetExtractor(rch));
 	}
 
 	@Override
 	public void query(String sql, PreparedStatementSetter pss, RowCallbackHandler rch) throws DataAccessException {
 		query(sql, pss, new RowCallbackHandlerResultSetExtractor(rch));
 	}
 
 	@Override
 	public void query(String sql, Object[] args, int[] argTypes, RowCallbackHandler rch) throws DataAccessException {
 		query(sql, newArgTypePreparedStatementSetter(args, argTypes), rch);
 	}
 
 	@Override
 	public void query(String sql, Object[] args, RowCallbackHandler rch) throws DataAccessException {
 		query(sql, newArgPreparedStatementSetter(args), rch);
 	}
 
 	@Override
 	public void query(String sql, RowCallbackHandler rch, Object... args) throws DataAccessException {
 		query(sql, newArgPreparedStatementSetter(args), rch);
 	}
 
 	@Override
 	public <T> List<T> query(PreparedStatementCreator psc, RowMapper<T> rowMapper) throws DataAccessException {
 		return query(psc, new RowMapperResultSetExtractor<T>(rowMapper));
 	}
 
 	@Override
 	public <T> List<T> query(String sql, PreparedStatementSetter pss, RowMapper<T> rowMapper) throws DataAccessException {
 		return query(sql, pss, new RowMapperResultSetExtractor<T>(rowMapper));
 	}
 
 	@Override
 	public <T> List<T> query(String sql, Object[] args, int[] argTypes, RowMapper<T> rowMapper) throws DataAccessException {
 		return query(sql, args, argTypes, new RowMapperResultSetExtractor<T>(rowMapper));
 	}
 
 	@Override
 	public <T> List<T> query(String sql, Object[] args, RowMapper<T> rowMapper) throws DataAccessException {
 		return query(sql, args, new RowMapperResultSetExtractor<T>(rowMapper));
 	}
 
 	@Override
 	public <T> List<T> query(String sql, RowMapper<T> rowMapper, Object... args) throws DataAccessException {
 		return query(sql, args, new RowMapperResultSetExtractor<T>(rowMapper));
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, Object[] args, int[] argTypes, RowMapper<T> rowMapper)
 			throws DataAccessException {
 
 		List<T> results = query(sql, args, argTypes, new RowMapperResultSetExtractor<T>(rowMapper, 1));
 		return DataAccessUtils.requiredSingleResult(results);
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, Object[] args, RowMapper<T> rowMapper) throws DataAccessException {
 		List<T> results = query(sql, args, new RowMapperResultSetExtractor<T>(rowMapper, 1));
 		return DataAccessUtils.requiredSingleResult(results);
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, RowMapper<T> rowMapper, Object... args) throws DataAccessException {
 		List<T> results = query(sql, args, new RowMapperResultSetExtractor<T>(rowMapper, 1));
 		return DataAccessUtils.requiredSingleResult(results);
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, Object[] args, int[] argTypes, Class<T> requiredType)
 			throws DataAccessException {
 
 		return queryForObject(sql, args, argTypes, getSingleColumnRowMapper(requiredType));
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, Object[] args, Class<T> requiredType) throws DataAccessException {
 		return queryForObject(sql, args, getSingleColumnRowMapper(requiredType));
 	}
 
 	@Override
 	public <T> T queryForObject(String sql, Class<T> requiredType, Object... args) throws DataAccessException {
 		return queryForObject(sql, args, getSingleColumnRowMapper(requiredType));
 	}
 
 	@Override
 	public Map<String, Object> queryForMap(String sql, Object[] args, int[] argTypes) throws DataAccessException {
 		return queryForObject(sql, args, argTypes, getColumnMapRowMapper());
 	}
 
 	@Override
 	public Map<String, Object> queryForMap(String sql, Object... args) throws DataAccessException {
 		return queryForObject(sql, args, getColumnMapRowMapper());
 	}
 
 	@Override
 	@Deprecated
 	public long queryForLong(String sql, Object[] args, int[] argTypes) throws DataAccessException {
 		Number number = queryForObject(sql, args, argTypes, Long.class);
 		return (number != null ? number.longValue() : 0);
 	}
 
 	@Override
 	@Deprecated
 	public long queryForLong(String sql, Object... args) throws DataAccessException {
 		Number number = queryForObject(sql, args, Long.class);
 		return (number != null ? number.longValue() : 0);
 	}
 
 	@Override
 	@Deprecated
 	public int queryForInt(String sql, Object[] args, int[] argTypes) throws DataAccessException {
 		Number number = queryForObject(sql, args, argTypes, Integer.class);
 		return (number != null ? number.intValue() : 0);
 	}
 
 	@Override
 	@Deprecated
 	public int queryForInt(String sql, Object... args) throws DataAccessException {
 		Number number = queryForObject(sql, args, Integer.class);
 		return (number != null ? number.intValue() : 0);
 	}
 
 	@Override
 	public <T> List<T> queryForList(String sql, Object[] args, int[] argTypes, Class<T> elementType) throws DataAccessException {
 		return query(sql, args, argTypes, getSingleColumnRowMapper(elementType));
 	}
 
 	@Override
 	public <T> List<T> queryForList(String sql, Object[] args, Class<T> elementType) throws DataAccessException {
 		return query(sql, args, getSingleColumnRowMapper(elementType));
 	}
 
 	@Override
 	public <T> List<T> queryForList(String sql, Class<T> elementType, Object... args) throws DataAccessException {
 		return query(sql, args, getSingleColumnRowMapper(elementType));
 	}
 
 	@Override
 	public List<Map<String, Object>> queryForList(String sql, Object[] args, int[] argTypes) throws DataAccessException {
 		return query(sql, args, argTypes, getColumnMapRowMapper());
 	}
 
 	@Override
 	public List<Map<String, Object>> queryForList(String sql, Object... args) throws DataAccessException {
 		return query(sql, args, getColumnMapRowMapper());
 	}
 
 	@Override
 	public SqlRowSet queryForRowSet(String sql, Object[] args, int[] argTypes) throws DataAccessException {
 		return query(sql, args, argTypes, new SqlRowSetResultSetExtractor());
 	}
 
 	@Override
 	public SqlRowSet queryForRowSet(String sql, Object... args) throws DataAccessException {
 		return query(sql, args, new SqlRowSetResultSetExtractor());
 	}
 
 	protected int update(final PreparedStatementCreator psc, final PreparedStatementSetter pss)
 			throws DataAccessException {
 
 		logger.debug("Executing prepared SQL update");
 		return execute(psc, new PreparedStatementCallback<Integer>() {
 			@Override
 			public Integer doInPreparedStatement(PreparedStatement ps) throws SQLException {
 				try {
 					if (pss != null) {
 						pss.setValues(ps);
 					}
 					int rows = ps.executeUpdate();
 					if (logger.isDebugEnabled()) {
 						logger.debug("SQL update affected " + rows + " rows");
 					}
 					return rows;
 				}
 				finally {
 					if (pss instanceof ParameterDisposer) {
 						((ParameterDisposer) pss).cleanupParameters();
 					}
 				}
 			}
 		});
 	}
 
 	@Override
 	public int update(PreparedStatementCreator psc) throws DataAccessException {
 		return update(psc, (PreparedStatementSetter) null);
 	}
 
 	@Override
 	public int update(final PreparedStatementCreator psc, final KeyHolder generatedKeyHolder)
 			throws DataAccessException {
 
 		Assert.notNull(generatedKeyHolder, "KeyHolder must not be null");
 		logger.debug("Executing SQL update and returning generated keys");
 
 		return execute(psc, new PreparedStatementCallback<Integer>() {
 			@Override
 			public Integer doInPreparedStatement(PreparedStatement ps) throws SQLException {
 				int rows = ps.executeUpdate();
 				List<Map<String, Object>> generatedKeys = generatedKeyHolder.getKeyList();
 				generatedKeys.clear();
 				ResultSet keys = ps.getGeneratedKeys();
 				if (keys != null) {
 					try {
 						RowMapperResultSetExtractor<Map<String, Object>> rse =
 								new RowMapperResultSetExtractor<Map<String, Object>>(getColumnMapRowMapper(), 1);
 						generatedKeys.addAll(rse.extractData(keys));
 					}
 					finally {
 						JdbcUtils.closeResultSet(keys);
 					}
 				}
 				if (logger.isDebugEnabled()) {
 					logger.debug("SQL update affected " + rows + " rows and returned " + generatedKeys.size() + " keys");
 				}
 				return rows;
 			}
 		});
 	}
 
 	@Override
 	public int update(String sql, PreparedStatementSetter pss) throws DataAccessException {
 		return update(new SimplePreparedStatementCreator(sql), pss);
 	}
 
 	@Override
 	public int update(String sql, Object[] args, int[] argTypes) throws DataAccessException {
 		return update(sql, newArgTypePreparedStatementSetter(args, argTypes));
 	}
 
 	@Override
 	public int update(String sql, Object... args) throws DataAccessException {
 		return update(sql, newArgPreparedStatementSetter(args));
 	}
 
 	@Override
 	public int[] batchUpdate(String sql, final BatchPreparedStatementSetter pss) throws DataAccessException {
 		if (logger.isDebugEnabled()) {
 			logger.debug("Executing SQL batch update [" + sql + "]");
 		}
 
 		return execute(sql, new PreparedStatementCallback<int[]>() {
 			@Override
 			public int[] doInPreparedStatement(PreparedStatement ps) throws SQLException {
 				try {
 					int batchSize = pss.getBatchSize();
 					InterruptibleBatchPreparedStatementSetter ipss =
 							(pss instanceof InterruptibleBatchPreparedStatementSetter ?
 							(InterruptibleBatchPreparedStatementSetter) pss : null);
 					if (JdbcUtils.supportsBatchUpdates(ps.getConnection())) {
 						for (int i = 0; i < batchSize; i++) {
 							pss.setValues(ps, i);
 							if (ipss != null && ipss.isBatchExhausted(i)) {
 								break;
 							}
 							ps.addBatch();
 						}
 						return ps.executeBatch();
 					}
 					else {
 						List<Integer> rowsAffected = new ArrayList<Integer>();
 						for (int i = 0; i < batchSize; i++) {
 							pss.setValues(ps, i);
 							if (ipss != null && ipss.isBatchExhausted(i)) {
 								break;
 							}
 							rowsAffected.add(ps.executeUpdate());
 						}
 						int[] rowsAffectedArray = new int[rowsAffected.size()];
 						for (int i = 0; i < rowsAffectedArray.length; i++) {
 							rowsAffectedArray[i] = rowsAffected.get(i);
 						}
 						return rowsAffectedArray;
 					}
 				}
 				finally {
 					if (pss instanceof ParameterDisposer) {
 						((ParameterDisposer) pss).cleanupParameters();
 					}
 				}
 			}
 		});
 	}
 
 	@Override
 	public int[] batchUpdate(String sql, List<Object[]> batchArgs) throws DataAccessException {
 		return batchUpdate(sql, batchArgs, new int[0]);
 	}
 
 	@Override
 	public int[] batchUpdate(String sql, List<Object[]> batchArgs, int[] argTypes) throws DataAccessException {
 		return BatchUpdateUtils.executeBatchUpdate(sql, batchArgs, argTypes, this);
 	}
 
 	@Override
 	public <T> int[][] batchUpdate(String sql, final Collection<T> batchArgs, final int batchSize,
 			final ParameterizedPreparedStatementSetter<T> pss) throws DataAccessException {
 
 		if (logger.isDebugEnabled()) {
 			logger.debug("Executing SQL batch update [" + sql + "] with a batch size of " + batchSize);
 		}
 		return execute(sql, new PreparedStatementCallback<int[][]>() {
 			@Override
 			public int[][] doInPreparedStatement(PreparedStatement ps) throws SQLException {
 				List<int[]> rowsAffected = new ArrayList<int[]>();
 				try {
 					boolean batchSupported = true;
 					if (!JdbcUtils.supportsBatchUpdates(ps.getConnection())) {
 						batchSupported = false;
 						logger.warn("JDBC Driver does not support Batch updates; resorting to single statement execution");
 					}
 					int n = 0;
 					for (T obj : batchArgs) {
 						pss.setValues(ps, obj);
 						n++;
 						if (batchSupported) {
 							ps.addBatch();
 							if (n % batchSize == 0 || n == batchArgs.size()) {
 								if (logger.isDebugEnabled()) {
 									int batchIdx = (n % batchSize == 0) ? n / batchSize : (n / batchSize) + 1;
 									int items = n - ((n % batchSize == 0) ? n / batchSize - 1 : (n / batchSize)) * batchSize;
 									logger.debug("Sending SQL batch update #" + batchIdx + " with " + items + " items");
 								}
 								rowsAffected.add(ps.executeBatch());
 							}
 						}
 						else {
 							int i = ps.executeUpdate();
 							rowsAffected.add(new int[] {i});
 						}
 					}
 					int[][] result = new int[rowsAffected.size()][];
 					for (int i = 0; i < result.length; i++) {
 						result[i] = rowsAffected.get(i);
 					}
 					return result;
 				} finally {
 					if (pss instanceof ParameterDisposer) {
 						((ParameterDisposer) pss).cleanupParameters();
 					}
 				}
 			}
 		});
 	}
 
 	//-------------------------------------------------------------------------
 	// Methods dealing with callable statements
 	//-------------------------------------------------------------------------
 
 	@Override
 	public <T> T execute(CallableStatementCreator csc, CallableStatementCallback<T> action)
 			throws DataAccessException {
 
 		Assert.notNull(csc, "CallableStatementCreator must not be null");
 		Assert.notNull(action, "Callback object must not be null");
 		if (logger.isDebugEnabled()) {
 			String sql = getSql(csc);
 			logger.debug("Calling stored procedure" + (sql != null ? " [" + sql  + "]" : ""));
 		}
 
 		Connection con = DataSourceUtils.getConnection(getDataSource());
 		CallableStatement cs = null;
 		try {
 			Connection conToUse = con;
 			if (this.nativeJdbcExtractor != null) {
 				conToUse = this.nativeJdbcExtractor.getNativeConnection(con);
 			}
 			cs = csc.createCallableStatement(conToUse);
 			applyStatementSettings(cs);
 			CallableStatement csToUse = cs;
 			if (this.nativeJdbcExtractor != null) {
 				csToUse = this.nativeJdbcExtractor.getNativeCallableStatement(cs);
 			}
 			T result = action.doInCallableStatement(csToUse);
 			handleWarnings(cs);
 			return result;
 		}
 		catch (SQLException ex) {
 			// Release Connection early, to avoid potential connection pool deadlock
 			// in the case when the exception translator hasn't been initialized yet.
 			if (csc instanceof ParameterDisposer) {
 				((ParameterDisposer) csc).cleanupParameters();
 			}
 			String sql = getSql(csc);
 			csc = null;
 			JdbcUtils.closeStatement(cs);
 			cs = null;
 			DataSourceUtils.releaseConnection(con, getDataSource());
 			con = null;
 			throw getExceptionTranslator().translate("CallableStatementCallback", sql, ex);
 		}
 		finally {
 			if (csc instanceof ParameterDisposer) {
 				((ParameterDisposer) csc).cleanupParameters();
 			}
 			JdbcUtils.closeStatement(cs);
 			DataSourceUtils.releaseConnection(con, getDataSource());
 		}
 	}
 
 	@Override
 	public <T> T execute(String callString, CallableStatementCallback<T> action) throws DataAccessException {
 		return execute(new SimpleCallableStatementCreator(callString), action);
 	}
 
 	@Override
 	public Map<String, Object> call(CallableStatementCreator csc, List<SqlParameter> declaredParameters)
 			throws DataAccessException {
 
 		final List<SqlParameter> updateCountParameters = new ArrayList<SqlParameter>();
 		final List<SqlParameter> resultSetParameters = new ArrayList<SqlParameter>();
 		final List<SqlParameter> callParameters = new ArrayList<SqlParameter>();
 		for (SqlParameter parameter : declaredParameters) {
 			if (parameter.isResultsParameter()) {
 				if (parameter instanceof SqlReturnResultSet) {
 					resultSetParameters.add(parameter);
 				}
 				else {
 					updateCountParameters.add(parameter);
 				}
 			}
 			else {
 				callParameters.add(parameter);
 			}
 		}
 		return execute(csc, new CallableStatementCallback<Map<String, Object>>() {
 			@Override
 			public Map<String, Object> doInCallableStatement(CallableStatement cs) throws SQLException {
 				boolean retVal = cs.execute();
 				int updateCount = cs.getUpdateCount();
 				if (logger.isDebugEnabled()) {
 					logger.debug("CallableStatement.execute() returned '" + retVal + "'");
 					logger.debug("CallableStatement.getUpdateCount() returned " + updateCount);
 				}
 				Map<String, Object> returnedResults = createResultsMap();
 				if (retVal || updateCount != -1) {
 					returnedResults.putAll(extractReturnedResults(cs, updateCountParameters, resultSetParameters, updateCount));
 				}
 				returnedResults.putAll(extractOutputParameters(cs, callParameters));
 				return returnedResults;
 			}
 		});
 	}
 
 	/**
 	 * Extract returned ResultSets from the completed stored procedure.
 	 * @param cs JDBC wrapper for the stored procedure
 	 * @param updateCountParameters Parameter list of declared update count parameters for the stored procedure
 	 * @param resultSetParameters Parameter list of declared resultSet parameters for the stored procedure
 	 * @return Map that contains returned results
 	 */
 	protected Map<String, Object> extractReturnedResults(CallableStatement cs,
 			List<SqlParameter> updateCountParameters, List<SqlParameter> resultSetParameters, int updateCount)
 			throws SQLException {
 
 		Map<String, Object> returnedResults = new HashMap<String, Object>();
 		int rsIndex = 0;
 		int updateIndex = 0;
 		boolean moreResults;
 		if (!this.skipResultsProcessing) {
 			do {
 				if (updateCount == -1) {
 					if (resultSetParameters != null && resultSetParameters.size() > rsIndex) {
 						SqlReturnResultSet declaredRsParam = (SqlReturnResultSet) resultSetParameters.get(rsIndex);
 						returnedResults.putAll(processResultSet(cs.getResultSet(), declaredRsParam));
 						rsIndex++;
 					}
 					else {
 						if (!this.skipUndeclaredResults) {
 							String rsName = RETURN_RESULT_SET_PREFIX + (rsIndex + 1);
 							SqlReturnResultSet undeclaredRsParam = new SqlReturnResultSet(rsName, new ColumnMapRowMapper());
 							if (logger.isDebugEnabled()) {
 								logger.debug("Added default SqlReturnResultSet parameter named '" + rsName + "'");
 							}
 							returnedResults.putAll(processResultSet(cs.getResultSet(), undeclaredRsParam));
 							rsIndex++;
 						}
 					}
 				}
 				else {
 					if (updateCountParameters != null && updateCountParameters.size() > updateIndex) {
 						SqlReturnUpdateCount ucParam = (SqlReturnUpdateCount) updateCountParameters.get(updateIndex);
 						String declaredUcName = ucParam.getName();
 						returnedResults.put(declaredUcName, updateCount);
 						updateIndex++;
 					}
 					else {
 						if (!this.skipUndeclaredResults) {
 							String undeclaredName = RETURN_UPDATE_COUNT_PREFIX + (updateIndex + 1);
 							if (logger.isDebugEnabled()) {
 								logger.debug("Added default SqlReturnUpdateCount parameter named '" + undeclaredName + "'");
 							}
 							returnedResults.put(undeclaredName, updateCount);
 							updateIndex++;
 						}
 					}
 				}
 				moreResults = cs.getMoreResults();
 				updateCount = cs.getUpdateCount();
 				if (logger.isDebugEnabled()) {
 					logger.debug("CallableStatement.getUpdateCount() returned " + updateCount);
 				}
 			}
 			while (moreResults || updateCount != -1);
 		}
 		return returnedResults;
 	}
 
 	/**
 	 * Extract output parameters from the completed stored procedure.
 	 * @param cs JDBC wrapper for the stored procedure
 	 * @param parameters parameter list for the stored procedure
 	 * @return Map that contains returned results
 	 */
 	protected Map<String, Object> extractOutputParameters(CallableStatement cs, List<SqlParameter> parameters)
 			throws SQLException {
 
 		Map<String, Object> returnedResults = new HashMap<String, Object>();
 		int sqlColIndex = 1;
 		for (SqlParameter param : parameters) {
 			if (param instanceof SqlOutParameter) {
 				SqlOutParameter outParam = (SqlOutParameter) param;
 				if (outParam.isReturnTypeSupported()) {
 					Object out = outParam.getSqlReturnType().getTypeValue(
 							cs, sqlColIndex, outParam.getSqlType(), outParam.getTypeName());
 					returnedResults.put(outParam.getName(), out);
 				}
 				else {
 					Object out = cs.getObject(sqlColIndex);
 					if (out instanceof ResultSet) {
 						if (outParam.isResultSetSupported()) {
 							returnedResults.putAll(processResultSet((ResultSet) out, outParam));
 						}
 						else {
 							String rsName = outParam.getName();
 							SqlReturnResultSet rsParam = new SqlReturnResultSet(rsName, new ColumnMapRowMapper());
 							returnedResults.putAll(processResultSet((ResultSet) out, rsParam));
 							if (logger.isDebugEnabled()) {
 								logger.debug("Added default SqlReturnResultSet parameter named '" + rsName + "'");
 							}
 						}
 					}
 					else {
 						returnedResults.put(outParam.getName(), out);
 					}
 				}
 			}
 			if (!(param.isResultsParameter())) {
 				sqlColIndex++;
 			}
 		}
 		return returnedResults;
 	}
 
 	/**
 	 * Process the given ResultSet from a stored procedure.
 	 * @param rs the ResultSet to process
 	 * @param param the corresponding stored procedure parameter
 	 * @return Map that contains returned results
 	 */
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	protected Map<String, Object> processResultSet(ResultSet rs, ResultSetSupportingSqlParameter param) throws SQLException {
 		if (rs == null) {
 			return Collections.emptyMap();
 		}
 		Map<String, Object> returnedResults = new HashMap<String, Object>();
 		try {
 			ResultSet rsToUse = rs;
 			if (this.nativeJdbcExtractor != null) {
 				rsToUse = this.nativeJdbcExtractor.getNativeResultSet(rs);
 			}
 			if (param.getRowMapper() != null) {
 				RowMapper rowMapper = param.getRowMapper();
 				Object result = (new RowMapperResultSetExtractor(rowMapper)).extractData(rsToUse);
 				returnedResults.put(param.getName(), result);
 			}
 			else if (param.getRowCallbackHandler() != null) {
 				RowCallbackHandler rch = param.getRowCallbackHandler();
 				(new RowCallbackHandlerResultSetExtractor(rch)).extractData(rsToUse);
 				returnedResults.put(param.getName(), "ResultSet returned from stored procedure was processed");
 			}
 			else if (param.getResultSetExtractor() != null) {
 				Object result = param.getResultSetExtractor().extractData(rsToUse);
 				returnedResults.put(param.getName(), result);
 			}
 		}
 		finally {
 			JdbcUtils.closeResultSet(rs);
 		}
 		return returnedResults;
 	}
 
 
 	//-------------------------------------------------------------------------
 	// Implementation hooks and helper methods
 	//-------------------------------------------------------------------------
 
 	/**
 	 * Create a new RowMapper for reading columns as key-value pairs.
 	 * @return the RowMapper to use
 	 * @see ColumnMapRowMapper
 	 */
 	protected RowMapper<Map<String, Object>> getColumnMapRowMapper() {
 		return new ColumnMapRowMapper();
 	}
 
 	/**
 	 * Create a new RowMapper for reading result objects from a single column.
 	 * @param requiredType the type that each result object is expected to match
 	 * @return the RowMapper to use
 	 * @see SingleColumnRowMapper
 	 */
 	protected <T> RowMapper<T> getSingleColumnRowMapper(Class<T> requiredType) {
 		return new SingleColumnRowMapper<T>(requiredType);
 	}
 
 	/**
 	 * Create a Map instance to be used as results map.
 	 * <p>If "isResultsMapCaseInsensitive" has been set to true,
 	 * a linked case-insensitive Map will be created.
 	 * @return the results Map instance
 	 * @see #setResultsMapCaseInsensitive
 	 */
 	protected Map<String, Object> createResultsMap() {
 		if (isResultsMapCaseInsensitive()) {
 			return new LinkedCaseInsensitiveMap<Object>();
 		}
 		else {
 			return new LinkedHashMap<String, Object>();
 		}
 	}
 
 	/**
 	 * Prepare the given JDBC Statement (or PreparedStatement or CallableStatement),
 	 * applying statement settings such as fetch size, max rows, and query timeout.
 	 * @param stmt the JDBC Statement to prepare
 	 * @throws SQLException if thrown by JDBC API
 	 * @see #setFetchSize
 	 * @see #setMaxRows
 	 * @see #setQueryTimeout
 	 * @see org.springframework.jdbc.datasource.DataSourceUtils#applyTransactionTimeout
 	 */
 	protected void applyStatementSettings(Statement stmt) throws SQLException {
 		int fetchSize = getFetchSize();
 		if (fetchSize >= 0) {
 			stmt.setFetchSize(fetchSize);
 		}
 		int maxRows = getMaxRows();
 		if (maxRows >= 0) {
 			stmt.setMaxRows(maxRows);
 		}
 		DataSourceUtils.applyTimeout(stmt, getDataSource(), getQueryTimeout());
 	}
 
 	/**
 	 * Create a new arg-based PreparedStatementSetter using the args passed in.
 	 * <p>By default, we'll create an {@link ArgumentPreparedStatementSetter}.
 	 * This method allows for the creation to be overridden by subclasses.
 	 * @param args object array with arguments
 	 * @return the new PreparedStatementSetter to use
 	 */
 	protected PreparedStatementSetter newArgPreparedStatementSetter(Object[] args) {
 		return new ArgumentPreparedStatementSetter(args);
 	}
 
 	/**
 	 * Create a new arg-type-based PreparedStatementSetter using the args and types passed in.
 	 * <p>By default, we'll create an {@link ArgumentTypePreparedStatementSetter}.
 	 * This method allows for the creation to be overridden by subclasses.
 	 * @param args object array with arguments
 	 * @param argTypes int array of SQLTypes for the associated arguments
 	 * @return the new PreparedStatementSetter to use
 	 */
 	protected PreparedStatementSetter newArgTypePreparedStatementSetter(Object[] args, int[] argTypes) {
 		return new ArgumentTypePreparedStatementSetter(args, argTypes);
 	}
 
 	/**
 	 * Throw an SQLWarningException if we're not ignoring warnings,
 	 * else log the warnings (at debug level).
 	 * @param stmt the current JDBC statement
 	 * @throws SQLWarningException if not ignoring warnings
 	 * @see org.springframework.jdbc.SQLWarningException
 	 */
 	protected void handleWarnings(Statement stmt) throws SQLException {
 		if (isIgnoreWarnings()) {
 			if (logger.isDebugEnabled()) {
 				SQLWarning warningToLog = stmt.getWarnings();
 				while (warningToLog != null) {
 					logger.debug("SQLWarning ignored: SQL state '" + warningToLog.getSQLState() + "', error code '" +
 							warningToLog.getErrorCode() + "', message [" + warningToLog.getMessage() + "]");
 					warningToLog = warningToLog.getNextWarning();
 				}
 			}
 		}
 		else {
 			handleWarnings(stmt.getWarnings());
 		}
 	}
 
 	/**
 	 * Throw an SQLWarningException if encountering an actual warning.
 	 * @param warning the warnings object from the current statement.
 	 * May be {@code null}, in which case this method does nothing.
 	 * @throws SQLWarningException in case of an actual warning to be raised
 	 */
 	protected void handleWarnings(SQLWarning warning) throws SQLWarningException {
 		if (warning != null) {
 			throw new SQLWarningException("Warning not ignored", warning);
 		}
 	}
 
 	/**
 	 * Determine SQL from potential provider object.
 	 * @param sqlProvider object that's potentially a SqlProvider
 	 * @return the SQL string, or {@code null}
 	 * @see SqlProvider
 	 */
 	private static String getSql(Object sqlProvider) {
 		if (sqlProvider instanceof SqlProvider) {
 			return ((SqlProvider) sqlProvider).getSql();
 		}
 		else {
 			return null;
 		}
 	}
 
 
 	/**
 	 * Invocation handler that suppresses close calls on JDBC Connections.
 	 * Also prepares returned Statement (Prepared/CallbackStatement) objects.
 	 * @see java.sql.Connection#close()
 	 */
 	private class CloseSuppressingInvocationHandler implements InvocationHandler {
 
 		private final Connection target;
 
 		public CloseSuppressingInvocationHandler(Connection target) {
 			this.target = target;
 		}
 
 		@Override
 		@SuppressWarnings("rawtypes")
 		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
 			// Invocation on ConnectionProxy interface coming in...
 
 			if (method.getName().equals("equals")) {
 				// Only consider equal when proxies are identical.
 				return (proxy == args[0]);
 			}
 			else if (method.getName().equals("hashCode")) {
 				// Use hashCode of PersistenceManager proxy.
 				return System.identityHashCode(proxy);
 			}
 			else if (method.getName().equals("unwrap")) {
 				if (((Class) args[0]).isInstance(proxy)) {
 					return proxy;
 				}
 			}
 			else if (method.getName().equals("isWrapperFor")) {
 				if (((Class) args[0]).isInstance(proxy)) {
 					return true;
 				}
 			}
 			else if (method.getName().equals("close")) {
 				// Handle close method: suppress, not valid.
 				return null;
 			}
 			else if (method.getName().equals("isClosed")) {
 				return false;
 			}
 			else if (method.getName().equals("getTargetConnection")) {
 				// Handle getTargetConnection method: return underlying Connection.
 				return this.target;
 			}
 
 			// Invoke method on target Connection.
 			try {
 				Object retVal = method.invoke(this.target, args);
 
 				// If return value is a JDBC Statement, apply statement settings
 				// (fetch size, max rows, transaction timeout).
 				if (retVal instanceof Statement) {
 					applyStatementSettings(((Statement) retVal));
 				}
 
 				return retVal;
 			}
 			catch (InvocationTargetException ex) {
 				throw ex.getTargetException();
 			}
 		}
 	}
 
 
 	/**
 	 * Simple adapter for PreparedStatementCreator, allowing to use a plain SQL statement.
 	 */
 	private static class SimplePreparedStatementCreator implements PreparedStatementCreator, SqlProvider {
 
 		private final String sql;
 
 		public SimplePreparedStatementCreator(String sql) {
 			Assert.notNull(sql, "SQL must not be null");
 			this.sql = sql;
 		}
 
 		@Override
 		public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
 			return con.prepareStatement(this.sql);
 		}
 
 		@Override
 		public String getSql() {
 			return this.sql;
 		}
 	}
 
 
 	/**
 	 * Simple adapter for CallableStatementCreator, allowing to use a plain SQL statement.
 	 */
 	private static class SimpleCallableStatementCreator implements CallableStatementCreator, SqlProvider {
 
 		private final String callString;
 
 		public SimpleCallableStatementCreator(String callString) {
 			Assert.notNull(callString, "Call string must not be null");
 			this.callString = callString;
 		}
 
 		@Override
 		public CallableStatement createCallableStatement(Connection con) throws SQLException {
 			return con.prepareCall(this.callString);
 		}
 
 		@Override
 		public String getSql() {
 			return this.callString;
 		}
 	}
 
 
 	/**
 	 * Adapter to enable use of a RowCallbackHandler inside a ResultSetExtractor.
 	 * <p>Uses a regular ResultSet, so we have to be careful when using it:
 	 * We don't use it for navigating since this could lead to unpredictable consequences.
 	 */
 	private static class RowCallbackHandlerResultSetExtractor implements ResultSetExtractor<Object> {
 
 		private final RowCallbackHandler rch;
 
 		public RowCallbackHandlerResultSetExtractor(RowCallbackHandler rch) {
 			this.rch = rch;
 		}
 
 		@Override
 		public Object extractData(ResultSet rs) throws SQLException {
 			while (rs.next()) {
 				this.rch.processRow(rs);
 			}
 			return null;
 		}
 	}
 
 }