Error merge image

Aspose.Words Product Family
1

Hello,
I am trying to make a poc based on Aspose.Words for Java and I’m having a problem when try to merge an image.

My word document looks like this:

Titre : { MERGEFIELD TITRE \* MERGEFORMAT }
Image : { MERGEFIELD \d "Image:IMAGETEST" \* MERGEFORMATINET}

My service :

public DocumentDto mergeDocument(String template, Map data) {
    InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(template);
    DocumentDto docx = new DocumentDto();
    try {
        Document document = new Document(is);
        document.getMailMerge().setFieldMergingCallback(new HandleMergeImageField());
        String[] fields = document.getMailMerge().getFieldNames();
        Object[] values = new Object[fields.length];
        IntStream.range(0, fields.length).forEach(i -> values[i] = data.get(fields[i]));
        document.getMailMerge().execute(fields, values);
        ByteArrayOutputStream dstStream = new ByteArrayOutputStream();
        document.save(dstStream, SaveFormat.DOCX);
        docx.setDocument(dstStream.toByteArray());
    } catch (Exception e) {
        logger.warning(() -> MessageFormat.format("Error : {0}", e.getMessage()));
    }
    return docx;
}

private class HandleMergeImageField implements IFieldMergingCallback {
    public void fieldMerging(FieldMergingArgs args) throws Exception {
        // Do nothing.
    }
    /**
        * This is called when mail merge engine encounters Image:XXX merge field in the document. You have a chance to return an Image object, file
        * name or a stream that contains the image.
        */
    public void imageFieldMerging(ImageFieldMergingArgs e) throws Exception {
        if (e.getFieldValue() == null) {
            e.setImageStream(new ByteArrayInputStream(new byte[] {}));
        } else {
            ByteArrayInputStream imageStream = new ByteArrayInputStream((byte[]) e.getFieldValue());
            e.setImageStream(imageStream);
        }
    }
}

My Junit test :

@Test
public void testMergeDocument() {
    Map data = new HashMap();
    data.put("TITRE", "TITRE_DOC");
    data.put("Image:IMAGETEST", "C:\\project\\avatar.jpeg");
    DocumentDto docx = service.mergeDocument("com/poc/template.docx", data);
    Assert.assertNotNull("document Not null", docx);
    Assert.assertNotNull("document Byte Not null", docx.getDocument());
}

My problem is located on HandleMergeImageField. imageFieldMerging, the e.getFieldValue() is null event if arrays passed to getMailMerge().execute contains the value of the field.

I trought also to pass byte[] of the image but I had the same problem.

Thanks for your help;

2

Hi,
Thanks for your inquiry. Please see attached simplified template and following code:

Document doc = new Document(getMyDir() + "input.docx");
doc.getMailMerge().setFieldMergingCallback(new HandleImageMergeField());
doc.getMailMerge().execute(
new String[] { "MyImageField" },
new Object[] { ImageIO.read(new File(getMyDir() + "aspose.words.jpg")) });
doc.save(getMyDir() + "15.7.0.docx");

private static class HandleImageMergeField implements IFieldMergingCallback {
    public void fieldMerging(FieldMergingArgs args) throws Exception {
        // Do nothing.
    }
    public void imageFieldMerging(ImageFieldMergingArgs e) throws Exception {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        ImageIO.write((BufferedImage) e.getFieldValue(), "jpg", os);
        InputStream is = new ByteArrayInputStream(os.toByteArray());
        e.setImageStream(is);
    }
}

I hope, this helps in fixing your own issue. You can fix your template document and code accordingly.
Best regards,

3

Hello,
Thanks for your Help.
My service will be used by other services, so I will get the image as byte[] and not a BufferedImage.
Best regards,

4

Hi,

I just tested your code with your template. but I’m still getting e.getFieldValue () = null event if the parameter ImageFieldMergingArgs is a BufferedImage non null ([BufferedImage@44a2b17b: type = 5 ColorModel: #pixelBits = 24 numComponents = 3 color space = java.awt.color.ICC_ColorSpace@7a56812e transparency = 1 has alpha = false isAlphaPre = false ByteInterleavedRaster: width = 200 height = 200 #numDataElements 3 dataOff[0] = 2])

Thanks for your Help.

5

Hi,

Finally i found the cause of the error.

As my service uses String[] fields = document.getMailMerge().getFieldNames();
fields contains “Image:MyImageField” and not “MyImageField” and the array for fields also contains “Image:MyImageField”.

The question will be now : how can get fileds without prefix?

Thanks.

6

Hi,

Thanks for your inquiry. You can use the following code to remove “Image:” prefix from merge fields:

Document doc = new Document(getMyDir() + "input.docx");

for (String field : doc.getMailMerge().getFieldNames())
{
    if (field.startsWith("Image:"))
        field = field.replace("Image:", "");

    System.out.println(field);
}

I hope, this helps.

Best regards,

7

Hello,
That’s what I want avoid.
Thanks for all