/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Rodrigo Westrupp
*/
package com.caucho.quercus.lib.db;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.LongValue;
import com.caucho.quercus.env.StringValue;
import com.caucho.quercus.env.UnsetValue;
import com.caucho.quercus.env.Value;
import com.caucho.util.L10N;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Postgres statement class. Since Postgres has no object oriented API,
* this is essentially a JdbcStatementResource.
*/
public class PostgresStatement extends JdbcStatementResource {
private static final Logger log = Logger.getLogger(PostgresStatement.class.getName());
private static final L10N L = new L10N(PostgresStatement.class);
// Map JDBC ?,?,? to any unsorted or duplicated params.
// Ex: INSERT INTO test VALUES($2, $1) is mapped as [0]->2, [1]->1
// INSERT INTO test VALUES($1, $1) is mapped as [0]->1, [1]->1
private ArrayList<LongValue> _preparedMapping = new ArrayList<LongValue>();
/**
* Constructor for PostgresStatement
*
* @param conn a Postgres connection
*/
PostgresStatement(Postgres conn)
{
super(conn);
}
/**
* Executes a prepared Postgres Query.
*
* @param env the PHP executing environment
* @return true on success or false on failure
*/
public boolean execute(Env env)
{
try {
int size = _preparedMapping.size();
int matches = 0;
for (int i = 0; i < size; i++) {
LongValue param = _preparedMapping.get(i);
Value paramV = getParam(param.toInt()-1);
if (paramV.equals(UnsetValue.UNSET)) {
env.warning(L.l("Not all parameters are bound"));
return false;
}
Object object = paramV.toJavaObject();
setObject(i+1, object);
}
return executeStatement();
} catch (Exception e) {
env.warning(L.l(e.toString()));
log.log(Level.FINE, e.toString(), e);
return false;
}
}
/**
* Prepares this statement with the given query.
*
* @param query SQL query
* @return true on success or false on failure
*/
public boolean prepare(Env env, StringValue query)
{
try {
String queryStr = query.toString();
_preparedMapping.clear();
// Map any unsorted or duplicated params.
// Ex: INSERT INTO test VALUES($2, $1) or
// INSERT INTO test VALUES($1, $1)
Pattern pattern = Pattern.compile("\\$([0-9]+)");
Matcher matcher = pattern.matcher(queryStr);
while (matcher.find()) {
int phpParam;
try {
phpParam = Integer.parseInt(matcher.group(1));
} catch(Exception ex) {
_preparedMapping.clear();
return false;
}
_preparedMapping.add(LongValue.create(phpParam));
}
// Make the PHP query a JDBC like query
// replacing ($1 -> ?) with question marks.
// XXX: replace this with Matcher.appendReplacement
// above when StringBuilder is supported.
queryStr = queryStr.replaceAll("\\$[0-9]+", "?");
// Prepare the JDBC query
return super.prepare(env, env.createString(queryStr));
} catch (Exception e) {
log.log(Level.FINE, e.toString(), e);
return false;
}
}
protected int getPreparedMappingSize()
{
return _preparedMapping.size();
}
}