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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.apache.tuscany.das.rdb.impl;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Iterator;
import org.apache.tuscany.das.rdb.Parameter;
import org.apache.tuscany.das.rdb.util.DebugUtil;
//TODO - Can use some refactoring. Much code is duplicated in "execute" methods
public class Statement {
protected final QueryString queryString;
protected ConnectionImpl jdbcConnection;
private static final boolean debug = false;
private PreparedStatement preparedStatement;
private boolean isPaging = false;
public Statement(String sqlString) {
this.queryString = new QueryString(sqlString);
}
public ResultSet executeQuery(Parameters parameters) throws SQLException {
PreparedStatement ps = getPreparedStatement();
ps = setParameters(ps, parameters);
ResultSet rs = ps.executeQuery();
return rs;
}
public ResultSet executeCall(Parameters parameters) throws SQLException {
try {
CallableStatement cs = jdbcConnection.prepareCall(queryString);
Iterator inParams = parameters.inParams().iterator();
while (inParams.hasNext()) {
Parameter param = (Parameter) inParams.next();
if (param.getIndex() == 0)
param.setIndex(queryString.getParameterIndex(param.getName()));
cs.setObject(param.getIndex(), param.getValue());
}
// register out parameters
Iterator outParams = parameters.outParams().iterator();
while (outParams.hasNext()) {
Parameter param = (Parameter) outParams.next();
if (param.getIndex() == 0)
param.setIndex(queryString.getParameterIndex(param.getName()));
DebugUtil.debugln(getClass(), debug, "Registering parameter " + param.getName());
cs.registerOutParameter(param.getIndex(), SDODataTypeHelper.sqlTypeFor(param.getType()));
}
// Using execute because Derby does not currenlty support
// executeQuery
// for SP
cs.execute();
ResultSet results = cs.getResultSet();
Iterator i = parameters.outParams().iterator();
while (i.hasNext()) {
Parameter param = (Parameter) i.next();
param.setValue(cs.getObject(param.getIndex()));
}
return results;
} catch (SQLException ex) {
ex.printStackTrace();
throw ex;
}
}
public void executeUpdateCall(Parameters parameters) throws SQLException {
CallableStatement cs = jdbcConnection.prepareCall(queryString);
Iterator inParams = parameters.inParams().iterator();
while (inParams.hasNext()) {
Parameter param = (Parameter) inParams.next();
if (param.getIndex() == 0)
param.setIndex(queryString.getParameterIndex(param.getName()));
cs.setObject(param.getIndex(), param.getValue());
}
// register out parameters
Iterator outParams = parameters.outParams().iterator();
while (outParams.hasNext()) {
Parameter param = (Parameter) outParams.next();
if (param.getIndex() == 0)
param.setIndex(queryString.getParameterIndex(param.getName()));
DebugUtil.debugln(getClass(), debug, "Registering parameter " + param.getName());
cs.registerOutParameter(param.getIndex(), SDODataTypeHelper.sqlTypeFor(param.getType()));
}
cs.execute();
Iterator out = parameters.outParams().iterator();
while (out.hasNext()) {
Parameter param = (Parameter) out.next();
param.setValue(cs.getObject(param.getIndex()));
}
}
/**
* TODO - We need to look at using specific ps.setXXX methods when a type
* has been specified and try setObject otherwise.
*/
public int executeUpdate(Parameters parameters) throws SQLException {
DebugUtil.debugln(getClass(), debug, "Executing statement " + queryString.getPreparedString());
PreparedStatement ps = getPreparedStatement();
Iterator i = parameters.inParams().iterator();
while (i.hasNext()) {
Parameter param = (Parameter) i.next();
if (param.getIndex() == 0)
param.setIndex(queryString.getParameterIndex(param.getName()));
Object value = param.getValue();
DebugUtil.debugln(getClass(), debug, "Setting parameter " + param.getIndex() + " to " + value);
if (value == null) {
ps.setNull(param.getIndex(), SDODataTypeHelper.sqlTypeFor(param.getType()));
} else {
ps.setObject(param.getIndex(), value);
}
}
return ps.executeUpdate();
}
protected PreparedStatement setParameters(PreparedStatement ps, Parameters parameters)
throws SQLException {
Iterator i = parameters.inParams().iterator();
while (i.hasNext()) {
Parameter param = (Parameter) i.next();
if (param.getIndex() == 0)
param.setIndex(queryString.getParameterIndex(param.getName()));
ps.setObject(param.getIndex(), param.getValue());
}
return ps;
}
public void setConnection(ConnectionImpl jdbcConnection) {
this.jdbcConnection = jdbcConnection;
}
public ConnectionImpl getConnection() {
return this.jdbcConnection;
}
private PreparedStatement getPreparedStatement() throws SQLException {
DebugUtil.debugln(getClass(), debug, "Getting prepared statement");
if (preparedStatement == null)
if (isPaging)
preparedStatement = jdbcConnection.preparePagedStatement(queryString);
else
preparedStatement = jdbcConnection.prepareStatement(queryString);
return preparedStatement;
}
public Integer getGeneratedKey() throws SQLException {
ResultSet rs = getPreparedStatement().getGeneratedKeys();
if (rs.next())
return new Integer(rs.getInt(1));
return null;
}
protected void enablePaging() {
isPaging = true;
}
public void close() {
if (this.preparedStatement != null) {
try {
preparedStatement.close();
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
}
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