Get PDF file information - facades

In order to get information specific to PDF file, you need to create an object of PdfFileInfo class. After that, you can get values of the individual properties like Subject, Title, Keywords and Creator etc.

The following code snippet shows you how to get PDF file information.

public static void GetPdfInfo()
    {
        // Open document
        PdfFileInfo fileInfo = new PdfFileInfo(_dataDir + "sample.pdf");
        // Get PDF information
        System.out.println("Subject: " + fileInfo.getSubject());
        System.out.println("Title: " + fileInfo.getTitle());
        System.out.println("Keywords: " + fileInfo.getKeywords());
        System.out.println("Creator: " + fileInfo.getCreator());
        System.out.println("Creation Date: " + fileInfo.getCreationDate());
        System.out.println("Modification Date: " + fileInfo.getModDate());
        // Find whether is it valid PDF and it is encrypted as well
        System.out.println("Is Valid PDF: " + fileInfo.isPdfFile());
        System.out.println("Is Encrypted: " + fileInfo.isEncrypted());

        System.out.println("Page width:" +fileInfo.getPageWidth(1));
    }

Get Meta Info

In order to get information, we use the getHeader method. With ‘Hashtable’ we get all the possible values.

public static void GetMetaInfo()
    {        
        // Create instance of PdffileInfo object
        PdfFileInfo fInfo = new PdfFileInfo(_dataDir + "SetMetaInfo_out.pdf");

        // Retrieve all existing custom attributes
        Hashtable<String,String> hTable = new Hashtable<String,String>(fInfo.getHeader());

        Enumeration<String> enumerator = hTable.keys();
        while (enumerator.hasMoreElements()) { 
            // get key
            String key = enumerator.nextElement();  
            // print key and value corresponding to that key
            System.out.println(key + ": " + hTable.get(key));
        }

        // Retrieve one custom attributes
        System.out.println( fInfo.getMetaInfo("Reviewer"));