/*-
 *******************************************************************************
 * Copyright (c) 2011, 2014 Diamond Light Source Ltd.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Matthew Gerring - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.dawnsci.analysis.examples.io;

import java.io.File;
import java.util.Arrays;

import org.eclipse.dawnsci.analysis.api.io.IDataHolder;
import org.eclipse.dawnsci.analysis.api.io.ILoaderService;
import org.eclipse.dawnsci.analysis.examples.Activator;
import org.eclipse.january.IMonitor;
import org.eclipse.january.dataset.IDataset;
import org.eclipse.january.dataset.ILazyDataset;
import org.eclipse.january.dataset.Slice;
import org.junit.Test;

/**
 * 
 * Simply loads data using the LoaderService
 * 
 * You may also provide your own loader to the service using an 
 * extension point. Please contact DAWN-DEV@JISCMAIL.AC.UK for information
 * on doing this.
 * 
 * @author Matthew Gerring
 *
 */
public class LoadingExamples {
	
	private static ILoaderService service;
	
	// Injected by OSGi
	public static void setLoaderService(ILoaderService s) {
		service = s;
	}
	
	@Test
	public void loadSeveral1D() throws Throwable {
		
		final File        loc  = new File(Activator.getBundleLocation(Activator.PLUGIN_ID), "metalmix.csv");
		final IDataHolder dh   = service.getData(loc.getAbsolutePath(), new IMonitor.Stub());
		
		System.out.println("We have several data as follows: ");
		for (String name : dh.getNames()) {
			System.out.println("We have loaded '"+name+"' with shape "+Arrays.toString(dh.getDataset(name).getShape()));
		}

	}
		
	@Test
	public void load2D() throws Throwable {
		
		final File     loc   = new File(Activator.getBundleLocation(Activator.PLUGIN_ID), "pow_M99S5_1_0001.cbf");
		final IDataset image = service.getDataset(loc.getAbsolutePath(), new IMonitor.Stub());
		
		System.out.println("We have loaded an image of shape "+Arrays.toString(image.getShape()));
	}
	
	@Test
	public void load2DLazy() throws Throwable {
		
		final File     loc   = new File(Activator.getBundleLocation(Activator.PLUGIN_ID), "pow_M99S5_1_0001.cbf");
		final IDataHolder dh   = service.getData(loc.getAbsolutePath(), new IMonitor.Stub());
		
		final ILazyDataset limage = dh.getLazyDataset(0); // This might actually be in memory depending in the loader, what we are
		                                                 // doing is saying that it does not need to be. Instead of a CBF if this
		                                                 // was an HDF5 file, it would not be in memory at this point...
		
		System.out.println("We have *NOT* loaded an image of shape "+Arrays.toString(limage.getShape()));
	
		// Last 500 rows (in this image dimension 0 is y)
		final IDataset image = limage.getSlice(new Slice(-500,null)); // Now we load it.
		System.out.println("We have loaded an image of shape "+Arrays.toString(image.getShape()));
	    
	}

}