package org.simantics.graph.tests.conversion;

import java.io.File;

import org.simantics.databoard.Files;
import org.simantics.databoard.binding.mutable.Variant;
import org.simantics.databoard.container.DataContainer;
import org.simantics.databoard.container.DataContainers;
import org.simantics.graph.representation.TransferableGraph1;

public class TG0_TG1 {

	public static void main(String[] args) throws Exception {
		if(args.length != 3) {
			System.err.println(TG0_TG1.class.getName() + " formatName input.tg output.tg");
			return;
		}
		String formatName = args[0];
		File input = new File(args[1]);
		File output = new File(args[2]);
		
		if(!input.exists()) {
			System.err.println(input + " does not exist.");
			return;
		}
		if(output.exists())
			output.delete();
		
		try {
			DataContainer header = DataContainers.readHeader(input);
			if (formatName.equals(header.format)) {
				System.err.println(input + " already has a data container with the required format, version is " + header.version);
				return;
			} else {
				System.err.println(input + " already has a data container with another format '" + header.format + ", version is " + header.version);
				return;
			}
		} catch (Throwable e) {
			// There is no DataContainer in the input file yet.
			// Continue conversion.
		}
		
		TransferableGraph0 tg0 = (TransferableGraph0)Files.readFile(input, TransferableGraph0.BINDING);
		TransferableGraph1 tg1 = new TransferableGraph1(
				tg0.resourceCount,
				tg0.identities,
				tg0.statements,
				tg0.values,
				tg0.extensions
				);
		DataContainers.writeFile(output, 
				new DataContainer(formatName, 1, new Variant(TransferableGraph1.BINDING, tg1)));
	}
	
}