java PbfWriter

PbfWriter is a class in the Java programming language that is used to write OpenStreetMap data in Protocol Buffer Binary format (PBF). This format is a compressed and efficient way of storing and transmitting large amounts of geographic data.

The PbfWriter class provides methods for writing various types of OpenStreetMap data, including nodes, ways, and relations. It also supports the writing of metadata such as timestamps, version numbers, and user IDs.

To use the PbfWriter class, you first need to create an instance of it and specify the output stream to which the PBF data should be written. You can then use the various methods provided by the class to write the OpenStreetMap data to the output stream.

Here's an example of how to use the PbfWriter class to write some OpenStreetMap data to a file:

import java.io.FileOutputStream;
import java.io.IOException;
import org.openstreetmap.osmosis.core.domain.v0_6.Node;
import org.openstreetmap.osmosis.core.domain.v0_6.TagCollection;
import org.openstreetmap.osmosis.core.domain.v0_6.Way;
import org.openstreetmap.osmosis.pbf2.v0_6.PbfWriter;

public class PbfWriterExample {

    public static void main(String[] args) throws IOException {
        // Create a PbfWriter instance and specify the output file
        PbfWriter pbfWriter = new PbfWriter(new FileOutputStream("output.pbf"));

        // Create a Node object and write it to the output stream
        Node node = new Node(1, new TagCollection(), 1.0, 2.0);
        pbfWriter.process(node);

        // Create a Way object and write it to the output stream
        Way way = new Way(2, new TagCollection(), null);
        way.getWayNodes().add(node);
        pbfWriter.process(way);

        // Close the PbfWriter to flush any remaining data to the output stream
        pbfWriter.complete();
        pbfWriter.close();
    }
}

In this example, we create a PbfWriter instance and specify an output file called "output.pbf". We then create a Node object with ID 1 and coordinates (1.0, 2.0), and write it to the output stream using the `process()` method of the PbfWriter. We then create a Way object with ID 2 and add the previously created Node to it, before writing the Way to the output stream. Finally, we close the PbfWriter to flush any remaining data to the output stream.