Create example n5 array datasets for a variety of compression methods.

CompressionExamples.java

package org.janelia.saalfeldlab.n5.generateExamples;

import org.janelia.saalfeldlab.n5.Bzip2Compression;
import org.janelia.saalfeldlab.n5.Compression;
import org.janelia.saalfeldlab.n5.GzipCompression;
import org.janelia.saalfeldlab.n5.Lz4Compression;
import org.janelia.saalfeldlab.n5.N5Writer;
import org.janelia.saalfeldlab.n5.RawCompression;
import org.janelia.saalfeldlab.n5.XzCompression;
import org.janelia.saalfeldlab.n5.blosc.BloscCompression;
import org.janelia.saalfeldlab.n5.imglib2.N5Utils;
import org.janelia.saalfeldlab.n5.universe.N5Factory;

import net.imglib2.img.array.ArrayImg;
import net.imglib2.img.array.ArrayImgs;
import net.imglib2.img.basictypeaccess.array.ByteArray;
import net.imglib2.type.numeric.integer.UnsignedByteType;

public class CompressionExamples {

	public static void main(String[] args) {
		
		final String rootPath = args[0];
		final N5Writer n5 = new N5Factory().openWriter( rootPath );

		final ArrayImg<UnsignedByteType, ByteArray> img = ArrayImgs.unsignedBytes(3, 2);
		final int[] blockSize = new int[]{3, 2};

		for( Compression c : getCompressions() )
		{
			final String dset = c.getClass().getName().replaceAll(".*\\.", "");
			System.out.println( dset );
			N5Utils.save(img, n5, dset, blockSize, c);
		}
	}

	protected static Compression[] getCompressions() {

		return new Compression[]{
				new RawCompression(),
				new Bzip2Compression(),
				new BloscCompression(),
				new GzipCompression(),
				new Lz4Compression(),
				new XzCompression()
		};
	}

}