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/**
* <copyright>
*
* Copyright (c) 2005, 2006, 2007, 2008 Springsite BV (The Netherlands) and others
* 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:
* Martin Taal - Initial API and implementation
*
* </copyright>
*
* $Id: EModelResolver.java,v 1.9 2009/03/30 07:53:05 mtaal Exp $
*/
package org.eclipse.emf.teneo.ecore;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.teneo.DataStore;
import org.eclipse.emf.teneo.ERuntime;
/**
* The EModelResolver allows pluggable access to the underlying ecore model. It maps from
* eclass/efeature names to java member names or to real eclass names. This default implementation
* only returns null.
*
* @author <a href="mtaal@elver.org">Martin Taal</a>
*/
public abstract class EModelResolver {
/** The default instance of an EcoreResolver */
private static EModelResolver instance = null;
/** Return the current ecore resolver */
public static EModelResolver instance() {
if (instance == null) {
instance = ERuntime.INSTANCE;
}
return instance;
}
/** Set an EcoreResolver */
public static void setInstance(EModelResolver modelResolver) {
instance = modelResolver;
}
private Map<EPackage, List<DataStore>> ePackageRegistration = new HashMap<EPackage, List<DataStore>>();
/** Clear all internal datastructures */
public abstract void clear();
/**
* @return the EClass for a java class, if not found then the superclass of the javaclass is tried
*/
public abstract EClass getEClass(Class<?> javaClass);
/** Is the epackage registered */
public abstract boolean isRegistered(EPackage epackage);
/** Register the epackages */
public abstract void register(EPackage[] epacks);
/** Register that a set of epackages is owned by a datastore */
public synchronized void registerOwnerShip(DataStore dataStore, EPackage[] epacks) {
for (EPackage ePackage : epacks) {
List<DataStore> stores = ePackageRegistration.get(ePackage);
if (stores == null) {
stores = new ArrayList<DataStore>();
ePackageRegistration.put(ePackage, stores);
}
if (!stores.contains(dataStore)) {
stores.add(dataStore);
}
}
}
/** Unregister an epackage */
public synchronized void unregisterOwnerShip(DataStore dataStore, EPackage[] epacks) {
final List<EPackage> toRemove = new ArrayList<EPackage>();
for (EPackage ePackage : epacks) {
List<DataStore> stores = ePackageRegistration.get(ePackage);
if (stores != null) {
stores.remove(dataStore);
if (stores.isEmpty()) {
ePackageRegistration.remove(ePackage);
toRemove.add(ePackage);
}
}
}
removeEPackages(toRemove);
}
/** Remove an epackage from the internal lists */
protected void removeEPackages(List<EPackage> ePackages) {
}
/** @return all java classes and interfaces */
public abstract List<Class<?>> getAllClassesAndInterfaces();
/** @return the java implementation class for an EClass */
public abstract Class<?> getJavaClass(EClassifier eclassifier);
/** @return the java interface class for an EClass */
public abstract Class<?> getJavaInterfaceClass(EClass eclass);
/** Returns true if the passed EClass has a javaClass representation. */
public abstract boolean hasImplementationClass(EClassifier eclassifier);
/** Returns the currently registered epackages */
public abstract EPackage[] getEPackages();
/** Returns null */
public abstract Object create(EClass eclass);
/** Returns a java instance of an EClass defined by name */
public Object create(EPackage epackage, String eclassName) {
final EClass eclass = (EClass) epackage.getEClassifier(eclassName);
if (eclass == null) {
throw new IllegalArgumentException("No EClass " + eclassName + " found in epackage "
+ epackage.getName());
}
return create(eclass);
}
/**
* Returns a java instance of an EClass defined by name, all epackages are searched for this
* eclass.
*/
public Object create(String eclassName) {
for (EPackage epackage : getEPackages()) {
final EClass eclass = (EClass) epackage.getEClassifier(eclassName);
if (eclass != null) {
return create(eclass);
}
}
throw new IllegalArgumentException("No EClass " + eclassName + " found.");
}
}
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