Removing metadata from JPEG with Commons Imaging

RemoveMetadata.java

package org.apache.commons.imaging.formats.jpeg.xmp;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.common.bytesource.ByteSource;
import org.apache.commons.imaging.common.bytesource.ByteSourceFile;
import org.apache.commons.imaging.formats.jpeg.JpegConstants;
import org.apache.commons.imaging.formats.jpeg.JpegUtils;
import org.apache.commons.imaging.formats.jpeg.xmp.JpegRewriter.JFIFPiece;
import org.apache.commons.imaging.formats.jpeg.xmp.JpegRewriter.JFIFPieceImageData;
import org.apache.commons.imaging.formats.jpeg.xmp.JpegRewriter.JFIFPieceSegment;

public class RemoveMetadata {

    public static void main(String[] args) throws Exception {
        File file = new File("/tmp/01.jpg");
        ByteSource byteSource = new ByteSourceFile(file);

        final List<JFIFPiece> pieces = new ArrayList<>();
        JpegUtils.Visitor visitor = new JpegUtils.Visitor() {

            @Override
            public boolean visitSegment(int marker, byte[] markerBytes, int segmentLength, byte[] segmentLengthBytes,
                    byte[] segmentData) throws ImageReadException, IOException {
                // keep only the APP0 marker
                if ("ffe0".equals(Integer.toHexString(marker))) {
                    final JFIFPiece piece = new JFIFPieceSegment(marker, markerBytes, segmentLengthBytes, segmentData);
                    pieces.add(piece);
                }
                return true;
            }

            @Override
            public void visitSOS(int marker, byte[] markerBytes, byte[] imageData) {
                pieces.add(new JFIFPieceImageData(markerBytes, imageData));
            }

            @Override
            public boolean beginSOS() {
                return true;
            }
        };

        new JpegUtils().traverseJFIF(byteSource, visitor);
        OutputStream newImage = new FileOutputStream(new File("/tmp/02.jpg"));
        try (DataOutputStream os = new DataOutputStream(newImage)) {
            JpegConstants.SOI.writeTo(os);

            for (final JFIFPiece piece : pieces) {
                piece.write(os);
            }
        }
    }
}