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package ca.mcgill.ecse.socialnetwork.runner;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.emf.ecore.xmi.impl.XMIResourceFactoryImpl;
public class Persisitence<G extends EObject> {
private String uri;
public Persisitence (String suffix, String uri){
//prepare to save
Resource.Factory.Registry reg = Resource.Factory.Registry.INSTANCE;
Map<String, Object> m = reg.getExtensionToFactoryMap();
m.put(suffix, new XMIResourceFactoryImpl());
this.uri = uri;
}
/**
* Save the model
* @return whether the model has saved successfully
*/
public boolean save(G model) {
//create resource
ResourceSet resSet = new ResourceSetImpl();
Resource resource = resSet.createResource(URI.createURI(uri));
resource.getContents().add(model);
try {
resource.save(Collections.EMPTY_MAP);
return true;
}catch(IOException e) {
e.printStackTrace();
return false;
}
}
/**
* load the model from persistent
* @return: the model loaded
*/
@SuppressWarnings("unchecked")
public G load() {
G model = null;
// try {
ResourceSet resSet = new ResourceSetImpl();
Resource resource = resSet.getResource(URI.createURI(uri), true);
model = (G) resource.getContents().get(0);
// }catch (org.eclipse.emf.common.util.WrappedException e) {
// // if the file cannot be found then return null
// if(e.getCause().getClass() == java.io.FileNotFoundException.class) {
// return null;
// }
// }
return model;
}
}
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