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7. Add the GetRow function, which is the wrapper class for fetchRow, as shown. This will be used to get a row of data resulted from a SELECT query. // Wrapper method for PDOStatement::fetch public static function GetRow($statementHandler, $params = null, $fetchStyle = PDO::FETCH_ASSOC) { // Initialize the return value to null $result = null; // Try executing the prepared statement received as parameter try { self::Execute($statementHandler, $params); $result = $statementHandler->fetch($fetchStyle); } catch(PDOException $e) { // Close the database handler and trigger an error self::Close(); trigger_error($e->getMessage(), E_USER_ERROR); } // Return the query results return $result; } 8. Add the GetOne function, which is the wrapper class for fetch, as shown. This will be used to get a single value resulted from a SELECT query. // Return the first column value from a row public static function GetOne($statementHandler, $params = null) { // Initialize the return value to null $result = null; // Try executing the prepared statement received as parameter try { /* Execute the query, and save the first value of the result set (first column of the first row) to $result */ self::Execute($statementHandler, $params); $result = $statementHandler->fetch(PDO::FETCH_NUM); $result = $result[0]; } catch(PDOException $e) {

Note Changing this setting will affect the position of the subtotals in all the row fields in the pivot table.

You tell the Image object that it has already been added to the writer with the method setDirectReference(). Finally, you add the image to the document. The image bytes have already been written to the OutputStream in E. Line G writes the Do operator and its operands to the content stream of the page, and adds the correct reference to the image bytes F to the page dictionary. This example unveils the mechanism that s used by iText internally to add streams. You ll use the PDF file that was created by listing 16.1 in the next example. You ll search for an image with the special ID /123456789, and you ll replace it with another image that has a lower resolution.

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Here s another question that is often posted to the mailing list: How do I reduce the size of an existing PDF containing lots of images There are many different answers to this question, depending on the nature of the PDF file. Maybe the same image is added multiple times, in which case passing the PDF through PdfSmartCopy could result in a serious file size reduction. Maybe the PDF wasn t compressed, or maybe there are plenty of unused objects. You could try to see if the PdfReader s removeUnusedObjects() method has any effect. It s more likely that the PDF contains high-resolution images, in which case the original question should be rephrased as, How do I reduce the resolution of the images inside my PDF To achieve this, you should extract the image from the PDF, downsample it, then put it back into the PDF, replacing the high-resolution image. The next example uses brute force instead of the PdfReaderContentParser to find images. With the getXrefSize() method, you get the highest object number in the PDF document, and you loop over every object, searching for a stream that has the special ID you re looking for.

// Close the database handler and trigger an error self::Close(); trigger_error($e->getMessage(), E_USER_ERROR); } // Return the query results return $result; } 9. Create a file named catalog.php inside the business folder. Add the following code into this file: < php // Business tier class for reading product catalog information class Catalog { // Retrieves all departments public static function GetDepartments() { // Build SQL query $sql = 'SELECT * FROM catalog_get_departments_list();'; // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query and return the results return DatabaseHandler::GetAll($result); } } > 10. You need to include the newly created database_handler.php in app_top.php so you can make the class available for the application. To do this, add the highlighted code to the include/app_top.php file: < php // Include utility files require_once 'include/config.php'; require_once BUSINESS_DIR . 'error_handler.php'; // Sets the error handler ErrorHandler::SetHandler(); // Load the page template require_once PRESENTATION_DIR . 'page.php'; // Load the database handler require_once BUSINESS_DIR . 'database_handler.php'; >

PdfName key = new PdfName("ITXT_SpecialId"); PdfName value = new PdfName("123456789"); PdfReader reader = new PdfReader(SpecialId.RESULT); int n = reader.getXrefSize(); PdfObject object; PRStream stream; for (int i = 0; i < n; i++) { object = reader.getPdfObject(i); if (object == null || !object.isStream()) continue; stream = (PRStream)object; if (value.equals(stream.get(key))) { PdfImageObject image = new PdfImageObject(stream); BufferedImage bi = image.getBufferedImage(); if (bi == null) continue; int width = (int)(bi.getWidth() * FACTOR); int height = (int)(bi.getHeight() * FACTOR);