Get Metadata from XMP using Java

Introduction

Welcome to our step-by-step guide on utilizing Aspose.Page for Java to extract metadata from XMP files. XMP (Extensible Metadata Platform) provides a standardized way of storing metadata in files. This tutorial focuses on retrieving essential information from XMP using Java, offering insights into document details.

Prerequisites

Before diving into the tutorial, ensure you have the following prerequisites:

• Java Development Kit (JDK): Make sure you have Java installed on your machine.
• Aspose.Page for Java: Download and install the Aspose.Page library, which you can find here.

Import Packages

In your Java project, import the necessary packages:

import java.io.FileInputStream;
import com.aspose.eps.PsDocument;
import com.aspose.eps.xmp.XmpMetadata;
import com.aspose.eps.xmp.XmpValue;
import com.aspose.page.BaseExamplesTest;
import com.aspose.page.License;

Step 1: Initialize Input EPS File Stream

Begin by setting the path to your document directory and initializing the input EPS file stream.

String dataDir = "Your Document Directory";
FileInputStream psStream = new FileInputStream(dataDir + "xmp1.eps");
PsDocument document = new PsDocument(psStream);

Step 2: Get XMP Metadata

Retrieve XMP metadata from the EPS file. If the file lacks XMP metadata, a new one will be generated with values from PS metadata comments.

XmpMetadata xmp = document.getXmpMetadata();

Step 3: Extract CreatorTool Information

Check and print the “CreatorTool” value from the XMP metadata.

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

Step 4: Extract CreateDate Information

Check and print the “CreateDate” value from the XMP metadata.

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

Step 5: Retrieve Thumbnail Width

If thumbnails exist, extract and print the width of the first thumbnail.

if (xmp.containsKey("xmp:Thumbnails") && xmp.get("xmp:Thumbnails").isArray()) {
    XmpValue val = xmp.get("xmp:Thumbnails").toArray()[0];
    if (val.isNamedValues() && val.toNamedValues().containsKey("xmpGImg:width"))
        System.out.println("Thumbnail Width: " + val.toNamedValues().get("xmpGImg:width").toInteger());
}

Step 6: Extract Format Information

Check and print the “format” value from the XMP metadata.

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

Step 7: Get DocumentID

Check and print the “DocumentID” value from the XMP metadata.

if (xmp.containsKey("xmpMM:DocumentID"))
    System.out.println("DocumentID: " + xmp.get("xmpMM:DocumentID").toStringValue());

Conclusion

Congratulations! You’ve successfully learned how to extract XMP metadata using Aspose.Page for Java. This guide provides a comprehensive overview of the process, ensuring you can effectively retrieve essential information from your documents.

Frequently Asked Questions

Can I use Aspose.Page for Java with other programming languages?

Yes, Aspose.Page supports multiple languages, including Java, .NET, and more. Check the documentation for details.

Is a free trial available for Aspose.Page for Java?

Yes, you can access the free trial here.

Where can I find support for Aspose.Page for Java?

Visit the Aspose.Page forum for community support.

How do I obtain a temporary license for Aspose.Page for Java?

You can get a temporary license here.

Are there additional resources for Aspose.Page for Java?

Explore the complete documentation and download the library here.