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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Db
  * @subpackage Statement
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Db_Statement
  */
 // require_once 'Zend/Db/Statement.php';
 
 /**
  * Extends for Oracle.
  *
  * @category   Zend
  * @package    Zend_Db
  * @subpackage Statement
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Db_Statement_Oracle extends Zend_Db_Statement
 {
 
     /**
      * Column names.
      */
     protected $_keys;
 
     /**
      * Fetched result values.
      */
     protected $_values;
 
     /**
      * Check if LOB field are returned as string
      * instead of OCI-Lob object
      *
      * @var boolean
      */
     protected $_lobAsString = false;
 
     /**
      * Activate/deactivate return of LOB as string
      *
      * @param string $lob_as_string
      * @return Zend_Db_Statement_Oracle
      */
     public function setLobAsString($lob_as_string)
     {
         $this->_lobAsString = (bool) $lob_as_string;
         return $this;
     }
 
     /**
      * Return whether or not LOB are returned as string
      *
      * @return boolean
      */
     public function getLobAsString()
     {
         return $this->_lobAsString;
     }
 
     /**
      * Prepares statement handle
      *
      * @param string $sql
      * @return void
      * @throws Zend_Db_Statement_Oracle_Exception
      */
     protected function _prepare($sql)
     {
         $connection = $this->_adapter->getConnection();
         $this->_stmt = @oci_parse($connection, $sql);
         if (!$this->_stmt) {
             /**
              * @see Zend_Db_Statement_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception(oci_error($connection));
         }
     }
 
     /**
      * Binds a parameter to the specified variable name.
      *
      * @param mixed $parameter Name the parameter, either integer or string.
      * @param mixed $variable  Reference to PHP variable containing the value.
      * @param mixed $type      OPTIONAL Datatype of SQL parameter.
      * @param mixed $length    OPTIONAL Length of SQL parameter.
      * @param mixed $options   OPTIONAL Other options.
      * @return bool
      * @throws Zend_Db_Statement_Exception
      */
     protected function _bindParam($parameter, &$variable, $type = null, $length = null, $options = null)
     {
         // default value
         if ($type === NULL) {
             $type = SQLT_CHR;
         }
 
         // default value
         if ($length === NULL) {
             $length = -1;
         }
 
         $retval = @oci_bind_by_name($this->_stmt, $parameter, $variable, $length, $type);
         if ($retval === false) {
             /**
              * @see Zend_Db_Adapter_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception(oci_error($this->_stmt));
         }
 
         return true;
     }
 
     /**
      * Closes the cursor, allowing the statement to be executed again.
      *
      * @return bool
      */
     public function closeCursor()
     {
         if (!$this->_stmt) {
             return false;
         }
 
         oci_free_statement($this->_stmt);
         $this->_stmt = false;
         return true;
     }
 
     /**
      * Returns the number of columns in the result set.
      * Returns null if the statement has no result set metadata.
      *
      * @return int The number of columns.
      */
     public function columnCount()
     {
         if (!$this->_stmt) {
             return false;
         }
 
         return oci_num_fields($this->_stmt);
     }
 
 
     /**
      * Retrieves the error code, if any, associated with the last operation on
      * the statement handle.
      *
      * @return string error code.
      */
     public function errorCode()
     {
         if (!$this->_stmt) {
             return false;
         }
 
         $error = oci_error($this->_stmt);
 
         if (!$error) {
             return false;
         }
 
         return $error['code'];
     }
 
 
     /**
      * Retrieves an array of error information, if any, associated with the
      * last operation on the statement handle.
      *
      * @return array
      */
     public function errorInfo()
     {
         if (!$this->_stmt) {
             return false;
         }
 
         $error = oci_error($this->_stmt);
         if (!$error) {
             return false;
         }
 
         if (isset($error['sqltext'])) {
             return array(
                 $error['code'],
                 $error['message'],
                 $error['offset'],
                 $error['sqltext'],
             );
         } else {
             return array(
                 $error['code'],
                 $error['message'],
             );
         }
     }
 
 
     /**
      * Executes a prepared statement.
      *
      * @param array $params OPTIONAL Values to bind to parameter placeholders.
      * @return bool
      * @throws Zend_Db_Statement_Exception
      */
     public function _execute(array $params = null)
     {
         $connection = $this->_adapter->getConnection();
 
         if (!$this->_stmt) {
             return false;
         }
 
         if ($params !== null) {
             if (!is_array($params)) {
                 $params = array($params);
             }
             $error = false;
             foreach (array_keys($params) as $name) {
                 if (!$this->bindParam($name, $params[$name], null, -1)) {
                     $error = true;
                     break;
                 }
             }
             if ($error) {
                 /**
                  * @see Zend_Db_Adapter_Oracle_Exception
                  */
                 // require_once 'Zend/Db/Statement/Oracle/Exception.php';
                 throw new Zend_Db_Statement_Oracle_Exception(oci_error($this->_stmt));
             }
         }
 
         $retval = @oci_execute($this->_stmt, $this->_adapter->_getExecuteMode());
         if ($retval === false) {
             /**
              * @see Zend_Db_Adapter_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception(oci_error($this->_stmt));
         }
 
         $this->_keys = Array();
         if ($field_num = oci_num_fields($this->_stmt)) {
             for ($i = 1; $i <= $field_num; $i++) {
                 $name = oci_field_name($this->_stmt, $i);
                 $this->_keys[] = $name;
             }
         }
 
         $this->_values = Array();
         if ($this->_keys) {
             $this->_values = array_fill(0, count($this->_keys), null);
         }
 
         return $retval;
     }
 
     /**
      * Fetches a row from the result set.
      *
      * @param int $style  OPTIONAL Fetch mode for this fetch operation.
      * @param int $cursor OPTIONAL Absolute, relative, or other.
      * @param int $offset OPTIONAL Number for absolute or relative cursors.
      * @return mixed Array, object, or scalar depending on fetch mode.
      * @throws Zend_Db_Statement_Exception
      */
     public function fetch($style = null, $cursor = null, $offset = null)
     {
         if (!$this->_stmt) {
             return false;
         }
 
         if ($style === null) {
             $style = $this->_fetchMode;
         }
 
         $lob_as_string = $this->getLobAsString() ? OCI_RETURN_LOBS : 0;
 
         switch ($style) {
             case Zend_Db::FETCH_NUM:
                 $row = oci_fetch_array($this->_stmt, OCI_NUM | OCI_RETURN_NULLS | $lob_as_string);
                 break;
             case Zend_Db::FETCH_ASSOC:
                 $row = oci_fetch_array($this->_stmt, OCI_ASSOC | OCI_RETURN_NULLS | $lob_as_string);
                 break;
             case Zend_Db::FETCH_BOTH:
                 $row = oci_fetch_array($this->_stmt, OCI_BOTH | OCI_RETURN_NULLS | $lob_as_string);
                 break;
             case Zend_Db::FETCH_OBJ:
                 $row = oci_fetch_object($this->_stmt);
                 break;
             case Zend_Db::FETCH_BOUND:
                 $row = oci_fetch_array($this->_stmt, OCI_BOTH | OCI_RETURN_NULLS | $lob_as_string);
                 if ($row !== false) {
                     return $this->_fetchBound($row);
                 }
                 break;
             default:
                 /**
                  * @see Zend_Db_Adapter_Oracle_Exception
                  */
                 // require_once 'Zend/Db/Statement/Oracle/Exception.php';
                 throw new Zend_Db_Statement_Oracle_Exception(
                     array(
                         'code'    => 'HYC00',
                         'message' => "Invalid fetch mode '$style' specified"
                     )
                 );
                 break;
         }
 
         if (! $row && $error = oci_error($this->_stmt)) {
             /**
              * @see Zend_Db_Adapter_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception($error);
         }
 
         if (is_array($row) && array_key_exists('zend_db_rownum', $row)) {
             unset($row['zend_db_rownum']);
         }
 
         return $row;
     }
 
     /**
      * Returns an array containing all of the result set rows.
      *
      * @param int $style OPTIONAL Fetch mode.
      * @param int $col   OPTIONAL Column number, if fetch mode is by column.
      * @return array Collection of rows, each in a format by the fetch mode.
      * @throws Zend_Db_Statement_Exception
      */
     public function fetchAll($style = null, $col = 0)
     {
         if (!$this->_stmt) {
             return false;
         }
 
         // make sure we have a fetch mode
         if ($style === null) {
             $style = $this->_fetchMode;
         }
 
         $flags = OCI_FETCHSTATEMENT_BY_ROW;
 
         switch ($style) {
             case Zend_Db::FETCH_BOTH:
                 /**
                  * @see Zend_Db_Adapter_Oracle_Exception
                  */
                 // require_once 'Zend/Db/Statement/Oracle/Exception.php';
                 throw new Zend_Db_Statement_Oracle_Exception(
                     array(
                         'code'    => 'HYC00',
                         'message' => "OCI8 driver does not support fetchAll(FETCH_BOTH), use fetch() in a loop instead"
                     )
                 );
                 // notreached
                 $flags |= OCI_NUM;
                 $flags |= OCI_ASSOC;
                 break;
             case Zend_Db::FETCH_NUM:
                 $flags |= OCI_NUM;
                 break;
             case Zend_Db::FETCH_ASSOC:
                 $flags |= OCI_ASSOC;
                 break;
             case Zend_Db::FETCH_OBJ:
                 break;
             case Zend_Db::FETCH_COLUMN:
                 $flags = $flags &~ OCI_FETCHSTATEMENT_BY_ROW;
                 $flags |= OCI_FETCHSTATEMENT_BY_COLUMN;
                 $flags |= OCI_NUM;
                 break;
             default:
                 /**
                  * @see Zend_Db_Adapter_Oracle_Exception
                  */
                 // require_once 'Zend/Db/Statement/Oracle/Exception.php';
                 throw new Zend_Db_Statement_Oracle_Exception(
                     array(
                         'code'    => 'HYC00',
                         'message' => "Invalid fetch mode '$style' specified"
                     )
                 );
                 break;
         }
 
         $result = Array();
         if ($flags != OCI_FETCHSTATEMENT_BY_ROW) { /* not Zend_Db::FETCH_OBJ */
             if (! ($rows = oci_fetch_all($this->_stmt, $result, 0, -1, $flags) )) {
                 if ($error = oci_error($this->_stmt)) {
                     /**
                      * @see Zend_Db_Adapter_Oracle_Exception
                      */
                     // require_once 'Zend/Db/Statement/Oracle/Exception.php';
                     throw new Zend_Db_Statement_Oracle_Exception($error);
                 }
                 if (!$rows) {
                     return array();
                 }
             }
             if ($style == Zend_Db::FETCH_COLUMN) {
                 $result = $result[$col];
             }
             foreach ($result as &$row) {
                 if (is_array($row) && array_key_exists('zend_db_rownum', $row)) {
                     unset($row['zend_db_rownum']);
                 }
             }
         } else {
             while (($row = oci_fetch_object($this->_stmt)) !== false) {
                 $result [] = $row;
             }
             if ($error = oci_error($this->_stmt)) {
                 /**
                  * @see Zend_Db_Adapter_Oracle_Exception
                  */
                 // require_once 'Zend/Db/Statement/Oracle/Exception.php';
                 throw new Zend_Db_Statement_Oracle_Exception($error);
             }
         }
 
         return $result;
     }
 
 
     /**
      * Returns a single column from the next row of a result set.
      *
      * @param int $col OPTIONAL Position of the column to fetch.
      * @return string
      * @throws Zend_Db_Statement_Exception
      */
     public function fetchColumn($col = 0)
     {
         if (!$this->_stmt) {
             return false;
         }
 
         if (!oci_fetch($this->_stmt)) {
             // if no error, there is simply no record
             if (!$error = oci_error($this->_stmt)) {
                 return false;
             }
             /**
              * @see Zend_Db_Adapter_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception($error);
         }
 
         $data = oci_result($this->_stmt, $col+1); //1-based
         if ($data === false) {
             /**
              * @see Zend_Db_Adapter_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception(oci_error($this->_stmt));
         }
 
         if ($this->getLobAsString()) {
             // instanceof doesn't allow '-', we must use a temporary string
             $type = 'OCI-Lob';
             if ($data instanceof $type) {
                 $data = $data->read($data->size());
             }
         }
 
         return $data;
     }
 
     /**
      * Fetches the next row and returns it as an object.
      *
      * @param string $class  OPTIONAL Name of the class to create.
      * @param array  $config OPTIONAL Constructor arguments for the class.
      * @return mixed One object instance of the specified class.
      * @throws Zend_Db_Statement_Exception
      */
     public function fetchObject($class = 'stdClass', array $config = array())
     {
         if (!$this->_stmt) {
             return false;
         }
 
         $obj = oci_fetch_object($this->_stmt);
 
         if ($error = oci_error($this->_stmt)) {
             /**
              * @see Zend_Db_Adapter_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception($error);
         }
 
         /* @todo XXX handle parameters */
 
         return $obj;
     }
 
     /**
      * Retrieves the next rowset (result set) for a SQL statement that has
      * multiple result sets.  An example is a stored procedure that returns
      * the results of multiple queries.
      *
      * @return bool
      * @throws Zend_Db_Statement_Exception
      */
     public function nextRowset()
     {
         /**
          * @see Zend_Db_Statement_Oracle_Exception
          */
         // require_once 'Zend/Db/Statement/Oracle/Exception.php';
         throw new Zend_Db_Statement_Oracle_Exception(
             array(
                 'code'    => 'HYC00',
                 'message' => 'Optional feature not implemented'
             )
         );
     }
 
     /**
      * Returns the number of rows affected by the execution of the
      * last INSERT, DELETE, or UPDATE statement executed by this
      * statement object.
      *
      * @return int     The number of rows affected.
      * @throws Zend_Db_Statement_Exception
      */
     public function rowCount()
     {
         if (!$this->_stmt) {
             return false;
         }
 
         $num_rows = oci_num_rows($this->_stmt);
 
         if ($num_rows === false) {
             /**
              * @see Zend_Db_Adapter_Oracle_Exception
              */
             // require_once 'Zend/Db/Statement/Oracle/Exception.php';
             throw new Zend_Db_Statement_Oracle_Exception(oci_error($this->_stmt));
         }
 
         return $num_rows;
     }
 
 }