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/*******************************************************************************
* Copyright (c) 2004-2011 Abel Hegedus and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.base.comprehension;
import java.util.Collection;
import java.util.Collections;
import java.util.WeakHashMap;
import org.apache.log4j.Logger;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.EStructuralFeature;
import tools.refinery.viatra.runtime.base.ViatraBasePlugin;
/**
* @author Abel Hegedus
*
*/
public class WellbehavingDerivedFeatureRegistry {
private static Collection<EStructuralFeature> contributedWellbehavingDerivedFeatures = Collections.newSetFromMap(new WeakHashMap<EStructuralFeature, Boolean>());
private static Collection<EClass> contributedWellbehavingDerivedClasses = Collections.newSetFromMap(new WeakHashMap<EClass, Boolean>());
private static Collection<EPackage> contributedWellbehavingDerivedPackages = Collections.newSetFromMap(new WeakHashMap<EPackage, Boolean>());
private WellbehavingDerivedFeatureRegistry() {
}
/**
* Called by ViatraBasePlugin.
*/
public static void initRegistry() {
getContributedWellbehavingDerivedFeatures().clear();
getContributedWellbehavingDerivedClasses().clear();
getContributedWellbehavingDerivedPackages().clear();
IExtensionRegistry reg = Platform.getExtensionRegistry();
IExtensionPoint poi;
poi = reg.getExtensionPoint(ViatraBasePlugin.WELLBEHAVING_DERIVED_FEATURE_EXTENSION_POINT_ID);
if (poi != null) {
IExtension[] exts = poi.getExtensions();
for (IExtension ext : exts) {
IConfigurationElement[] els = ext.getConfigurationElements();
for (IConfigurationElement el : els) {
if (el.getName().equals("wellbehaving-derived-feature")) {
processWellbehavingExtension(el);
} else {
throw new UnsupportedOperationException("Unknown configuration element " + el.getName()
+ " in plugin.xml of " + el.getDeclaringExtension().getUniqueIdentifier());
}
}
}
}
}
private static void processWellbehavingExtension(IConfigurationElement el) {
try {
String packageUri = el.getAttribute("package-nsUri");
String featureName = el.getAttribute("feature-name");
String classifierName = el.getAttribute("classifier-name");
String contributorName = el.getContributor().getName();
StringBuilder featureIdBuilder = new StringBuilder();
if (packageUri != null) {
EPackage pckg = EPackage.Registry.INSTANCE.getEPackage(packageUri);
featureIdBuilder.append(packageUri);
if (pckg != null) {
if (classifierName != null) {
EClassifier clsr = pckg.getEClassifier(classifierName);
featureIdBuilder.append("##").append(classifierName);
if (clsr instanceof EClass) {
if (featureName != null) {
EClass cls = (EClass) clsr;
EStructuralFeature feature = cls.getEStructuralFeature(featureName);
featureIdBuilder.append("##").append(featureName);
if (feature != null) {
registerWellbehavingDerivedFeature(feature);
} else {
throw new IllegalStateException(String.format("Feature %s of EClass %s in package %s not found! (plug-in %s)", featureName, classifierName, packageUri, contributorName));
}
} else {
registerWellbehavingDerivedClass((EClass) clsr);
}
} else {
throw new IllegalStateException(String.format("EClassifier %s does not exist in package %s! (plug-in %s)", classifierName, packageUri, contributorName));
}
} else {
if(featureName != null){
throw new IllegalStateException(String.format("Feature name must be empty if classifier name is not set! (package %s, plug-in %s)", packageUri, contributorName));
}
registerWellbehavingDerivedPackage(pckg);
}
}
}
} catch (Exception e) {
final Logger logger = Logger.getLogger(WellbehavingDerivedFeatureRegistry.class);
logger.error("Well-behaving feature registration failed", e);
}
}
/**
*
* @param feature
* @return true if the feature (or its defining EClass or ) is registered as well-behaving
*/
public static boolean isWellbehavingFeature(EStructuralFeature feature) {
if(feature == null){
return false;
} else if (contributedWellbehavingDerivedFeatures.contains(feature)) {
return true;
} else if (contributedWellbehavingDerivedClasses.contains(feature.getEContainingClass())) {
return true;
} else return contributedWellbehavingDerivedPackages.contains(feature.getEContainingClass().getEPackage());
}
public static void registerWellbehavingDerivedFeature(EStructuralFeature feature) {
contributedWellbehavingDerivedFeatures.add(feature);
}
public static void registerWellbehavingDerivedClass(EClass cls) {
contributedWellbehavingDerivedClasses.add(cls);
}
public static void registerWellbehavingDerivedPackage(EPackage pkg) {
contributedWellbehavingDerivedPackages.add(pkg);
}
public static Collection<EStructuralFeature> getContributedWellbehavingDerivedFeatures() {
return contributedWellbehavingDerivedFeatures;
}
public static Collection<EClass> getContributedWellbehavingDerivedClasses() {
return contributedWellbehavingDerivedClasses;
}
public static Collection<EPackage> getContributedWellbehavingDerivedPackages() {
return contributedWellbehavingDerivedPackages;
}
}
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