Cannot Cast DocumentInfo

GroupDocs.Total Product Family
1

Hello,

I’m trying to obtain information regarding the document I’m trying to convert to a PDF.
I would like to know if I’m processing a landscape or portrait document.

I’m getting the following error:

Failed to generate pdf for document ‘PwC Config.docx’ - class com.groupdocs.conversion.contracts.documentinfo.WordprocessingDocumentInfo cannot be cast to class com.groupdocs.conversion.contracts.documentinfo.PdfDocumentInfo (com.groupdocs.conversion.contracts.documentinfo.WordprocessingDocumentInfo and com.groupdocs.conversion.contracts.documentinfo.PdfDocumentInfo are in unnamed module of loader com.mendix.container.deployment.internal.Interpreters$ClassLoaders$$anon$1 @6bca7e0d)

code:
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.PdfConvertOptions;
import com.groupdocs.conversion.contracts.documentinfo.*;
import com.mendix.core.Core;
import com.mendix.logging.ILogNode;
import com.mendix.systemwideinterfaces.core.IContext;
import com.mendix.webui.CustomJavaAction;
import com.mendix.systemwideinterfaces.core.IMendixObject;

public class ConvertToPDF extends CustomJavaAction<java.lang.Void>
{
	private IMendixObject __InputFile;
	private system.proxies.FileDocument InputFile;
	private IMendixObject __OutputFile;
	private system.proxies.FileDocument OutputFile;

	public ConvertToPDF(IContext context, IMendixObject InputFile, IMendixObject OutputFile)
	{
		super(context);
		this.__InputFile = InputFile;
		this.__OutputFile = OutputFile;
	}

	@java.lang.Override
	public java.lang.Void executeAction() throws Exception
	{
		this.InputFile = __InputFile == null ? null : system.proxies.FileDocument.initialize(getContext(), __InputFile);

		this.OutputFile = __OutputFile == null ? null : system.proxies.FileDocument.initialize(getContext(), __OutputFile);

		// BEGIN USER CODE
		
		ILogNode logger = Core.getLogger("ConvertToPDF");
		
		try(ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
			Converter converter = new Converter(Core.getFileDocumentContent(getContext(), __InputFile));
					
	        PdfConvertOptions options = new PdfConvertOptions();
	        converter.convert(outputStream, options);
	        
	        IDocumentInfo info = converter.getDocumentInfo();
			PdfDocumentInfo pdfInfo = (PdfDocumentInfo) info;
	        	        
	        //logger.info("Is Landscape: " + pdfInfo.isLandscape());
	        //logger.info(pdfInfo.getHeight());
	        //logger.info(pdfInfo.getWidth());
	        
            Core.storeFileDocumentContent(getContext(), __OutputFile, new ByteArrayInputStream(outputStream.toByteArray()));
        } catch (IOException e) {
        	logger.error(e.getMessage());
        }
	
		return null;
		
		// END USER CODE
	}

	/**
	 * Returns a string representation of this action
	 */
	@java.lang.Override
	public java.lang.String toString()
	{
		return "ConvertToPDF";
	}

	// BEGIN EXTRA CODE
	// END EXTRA CODE
}

Can anyone tell me where I’m going wrong, I’m new to Java so any help would be appreciated.

Regards
Adrian

1 Like
2

@ateale

In order to obtain Word document information. Please use WordprocessingDocumentInfo instead of PdfDocumentInfo.

IDocumentInfo info = converter.getDocumentInfo();
WordprocessingDocumentInfo wordInfo = (WordprocessingDocumentInfo) info;
3

Hi Atir,

Thanks for the reply.

I was hoping to not need to know what type of file I am processing.
Is there a way then to get the info on the generated PDF document instead?

Regards
Adrian

4

@ateale

The workaround is, detect the file type and then use relevant DocumentInfo class (e.g. WordprocessingDocumentInfo, PdfDocumentInfo).

This is how you get info from the PDF file:

Converter converter = new Converter("resultant pdf file");
IDocumentInfo info = converter.getDocumentInfo();
PdfDocumentInfo pdfInfo = (PdfDocumentInfo) info;
System.out.print("Author: "+ pdfInfo.getAuthor());

Once the Word file is converted to PDF, you can pass the resultant PDF to Converter class as shown above. Please go through Get Document Info article for more details.

5

Got it!

Thanks again Atir :slight_smile:

1 Like
6

@ateale

You are welcome.