Add XMP metadata to EPS file using Java

In order to add XMP metadata to EPS file it is necessary to do several steps:

1. Initialize an input stream for input EPS file.
2. Create an instance of PsDocument from created earlier input stream.
3. Get an instance of XmpMetadata from the PsDocument. If given EPS file doesn’t contain XMP metadata the new one will be created, filled in with values from PS metadata comments and returned to you.
4. Now you can view values of metadata fileds.
5. Initialize an output stream for output EPS file.
6. Save EPS file with new XMP metadata.

The following code snippet shows how to add XMP metadata to EPS file in Java:

// Add XMP metadata to EPS document.

// Initialize EPS file input stream
try (FileInputStream psStream = new FileInputStream(getDataDir() + "add_input.eps")) {
    // Create PsDocument instance from stream. Given EPS file doesn't contain XMP metadata, but usual metadata does contain.
    PsDocument document = new PsDocument(psStream);

    String outputFileName = "add_xmp_metadata_out.eps";

    XmpMetadata xmp = null;

    try {
        // Get XMP metadata. If EPS file doesn't contain XMP metadata we get new one filled with values from PS metadata comments (%%Creator, %%CreateDate, %%Title etc)
        xmp = document.getXmpMetadata();

        // Check metadata values extracted from PS metadata comments and set up in new XMP metadata

        // Get "CreatorTool" value
        if (xmp.containsKey("xmp:CreatorTool"))
            System.out.println("CreatorTool: " + xmp.get("xmp:CreatorTool").toStringValue());

        // Get "CreateDate" value
        if (xmp.containsKey("xmp:CreateDate"))
            System.out.println("CreateDate: " + xmp.get("xmp:CreateDate").toStringValue());

        // Get "format" value
        if (xmp.containsKey("dc:format"))
            System.out.println("Format: " + xmp.get("dc:format").toStringValue());

        // Get "title" value
        if (xmp.containsKey("dc:title"))
            System.out.println("Title: " + xmp.get("dc:title").toArray()[0].toStringValue());

        // Get "creator" value
        if (xmp.containsKey("dc:creator"))
            System.out.println("Creator: " + xmp.get("dc:creator").toArray()[0].toStringValue());

        // Get "MetadataDate" value
        if (xmp.containsKey("xmp:MetadataDate"))
            System.out.println("MetadataDate: " + xmp.get("xmp:MetadataDate").toStringValue());

        // Update MetadataDate value                
        Date metadataDate = xmp.get("xmp:MetadataDate").toDateTime();

        // Save EPS file with new XMP metadata

        // Create ouput stream
        try (FileOutputStream outPsStream = new FileOutputStream(getOutputDir() + outputFileName)) {
            // Save EPS file
            document.save(outPsStream);
        }
    } catch (IOException ex) {
    }

See adding XMP metadata in .NET and C++.

You can download examples and data files from GitHub.