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/*******************************************************************************
* Copyright (c) 2014 protos software gmbh (http://www.protos.de).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* CONTRIBUTORS:
* Henrik Rentz-Reichert (initial contribution)
*
*******************************************************************************/
package org.eclipse.etrice.generator.base;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Collectors;
import org.eclipse.emf.common.EMFPlugin;
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.etrice.core.common.scoping.ModelLocatorUriResolver;
import org.eclipse.etrice.generator.base.args.Arguments;
import org.eclipse.etrice.generator.base.io.IGeneratorEMFSetup;
import org.eclipse.etrice.generator.base.io.IGeneratorResourceLoader;
import org.eclipse.etrice.generator.base.logging.ILogger;
import org.eclipse.etrice.generator.base.logging.NullLogger;
import org.eclipse.xtext.EcoreUtil2;
import org.eclipse.xtext.resource.XtextResourceSet;
import org.eclipse.xtext.util.CancelIndicator;
import org.xml.sax.SAXException;
import com.google.inject.Inject;
import com.google.inject.Provider;
/**
* @author Henrik Rentz-Reichert
*
*/
public class ModelLoader implements IGeneratorResourceLoader {
/**
* The injected resource set provider
*/
@Inject
private Provider<ResourceSet> resourceSetProvider;
/**
* The injected platform relative URI resolver
*/
@Inject
protected ModelLocatorUriResolver uriResolver;
@Inject
private IGeneratorEMFSetup emfSetup;
protected ILogger logger;
private boolean initializedEMF = EMFPlugin.IS_ECLIPSE_RUNNING;
private ResourceSet resourceSet;
private HashSet<URI> modelURIs = new HashSet<URI>();
private HashSet<URI> mainModelURIs = new HashSet<URI>();
private HashSet<URI> loadedModelURIs = new HashSet<URI>();
@Override
public List<Resource> load(List<String> files, Arguments arguments, ILogger logger) {
if(!initializedEMF) {
emfSetup.doEMFRegistration();
initializedEMF = true;
}
logger.logInfo("-- reading models");
if(loadModels(files, logger)) {
List<Resource> resources = getResourceSet().getResources().stream()
.filter(r -> getMainModelURIs().contains(r.getURI())).collect(Collectors.toList());
return resources;
}
else {
logger.logError("reading models failed");
logger.logInfo("-- terminating");
throw new GeneratorException("reading models failed");
}
}
public boolean loadModels(List<String> uriList) {
return loadModels(uriList, null);
}
public boolean loadModels(List<String> uriList, ILogger logger) {
if (logger==null) {
logger = new NullLogger();
}
this.logger = logger;
resourceSet = resourceSetProvider.get();
if (resourceSet instanceof XtextResourceSet) {
((XtextResourceSet) resourceSet).setClasspathURIContext(getClass().getClassLoader());
}
modelURIs.clear();
loadedModelURIs.clear();
for (String uri : uriList) {
addResourceURI(uriResolver.resolve(uri, null));
}
// now that we have a list of normalized input models we make a copy of them
mainModelURIs.addAll(modelURIs);
boolean ok = true;
while (!modelURIs.isEmpty()) {
URI uri = modelURIs.iterator().next();
//logger.logInfo("Loading " + uriString);
try {
if (loadModel(uri)) {
Resource resource = resourceSet.getResources().get(resourceSet.getResources().size()-1);
for (EObject root : resource.getContents()) {
Iterator<EObject> it = root.eContents().iterator();
while (it.hasNext()) {
EObject obj = it.next();
String importUri = uriResolver.resolve(obj);
if (importUri!=null) {
addResourceURI(importUri);
}
}
}
}
}
catch (Exception e) {
ok = false;
if (e instanceof FileNotFoundException)
logger.logError("couldn't load '"+uri+"' (file not found)");
if(e instanceof SAXException)
logger.logError("couldn't load '"+uri+"' (maybe unknown or wrong file extension, eTrice file extensions have to be lower case)");
else
logger.logError(e.getMessage());
}
modelURIs.remove(uri);
}
// make a copy to avoid concurrent modification
ArrayList<Resource> resources = new ArrayList<Resource>(resourceSet.getResources());
for (Resource res : resources) {
EcoreUtil2.resolveAll(res, CancelIndicator.NullImpl);
}
return ok;
}
/**
* Called by {@link #loadModels(List)} for each single model.
*
* @param uri the model URI
* @return <code>true</code> if successfully loaded or already loaded
* @throws RuntimeException
* @throws IOException
*/
private boolean loadModel(URI uri)
throws RuntimeException, IOException {
if (loadedModelURIs.contains(uri))
return true;
if (resourceSet.getResource(uri, false) != null)
// already loaded
return false;
logger.logInfo("loading model " + uri);
resourceSet.getResource(uri, true); // Could throw an exception...
loadedModelURIs.add(uri);
return true;
}
/**
* This implementation of the method assumes the URI is already normalized and adds it to the
* list of models to load if not already loaded.
*/
private boolean addResourceURI(String uri) {
URI can = null;
try {
// try valid uri
can = URI.createURI(uri);
} catch(IllegalArgumentException e1) {
}
if(can == null || !(can.isFile() || can.isArchive() || can.isPlatform() || can.scheme() == "classpath")) {
// try file path
can = URI.createFileURI(uri);
}
if (loadedModelURIs.contains(can))
return false;
boolean added = modelURIs.add(can);
if (added) {
if (loadedModelURIs.isEmpty())
logger.logInfo("added model "+uri);
else
logger.logInfo("added imported model "+uri);
}
return added;
}
/**
* @return
*/
public ResourceSet getResourceSet() {
return resourceSet;
}
/**
* @return the mainModelURIs
*/
public HashSet<URI> getMainModelURIs() {
return mainModelURIs;
}
}
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