/*
* JBoss, Home of Professional Open Source.
*
* See the LEGAL.txt file distributed with this work for information regarding copyright ownership and licensing.
*
* See the AUTHORS.txt file distributed with this work for a full listing of individual contributors.
*/
package org.teiid.designer.core.compare;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.impl.EObjectImpl;
import org.eclipse.emf.mapping.Mapping;
import org.eclipse.emf.mapping.MappingFactory;
import org.teiid.core.designer.id.IDGenerator;
import org.teiid.core.designer.id.InvalidIDException;
import org.teiid.core.designer.id.ObjectID;
import org.teiid.designer.core.ModelerCore;
/**
* UuidEObjectMatcher
*
* @since 8.0
*/
public class UuidEObjectMatcher extends AbstractEObjectMatcher {
/**
* Construct an instance of UuidEObjectMatcher.
*/
public UuidEObjectMatcher() {
super();
}
/**
* @see org.teiid.designer.core.compare.EObjectMatcher#addMappingsForRoots(java.util.List, java.util.List,
* org.eclipse.emf.mapping.Mapping, org.eclipse.emf.mapping.MappingFactory)
*/
@Override
public void addMappingsForRoots( final List inputs,
final List outputs,
final Mapping mapping,
final MappingFactory factory ) {
// do nothing for roots ...
}
/**
* @see org.teiid.designer.core.compare.EObjectMatcher#addMappings(org.eclipse.emf.ecore.EReference, java.util.List,
* java.util.List, org.eclipse.emf.mapping.Mapping, org.eclipse.emf.mapping.MappingFactory)
*/
@Override
public void addMappings( final EReference reference,
final List inputs,
final List outputs,
final Mapping mapping,
final MappingFactory factory ) {
// Loop over the inputs and accumulate the UUIDs ...
final Map idToInput = new HashMap();
final Iterator iter = inputs.iterator();
while (iter.hasNext()) {
final EObject obj = (EObject)iter.next();
final Object id = getObjectId(obj);
if (id != null) {
idToInput.put(id, obj);
}
}
// Loop over the outputs and compare the UUIDs ...
final Iterator outputIter = outputs.iterator();
while (outputIter.hasNext()) {
final EObject output = (EObject)outputIter.next();
final Object id = getObjectId(output);
final EObject input = (EObject)idToInput.get(id);
if (input != null) {
/*
* If either object is a proxy we have previously retrieved its
* UUID [see getObjectId( EObject )] and made sure that both objects
* had the same UUID. Since they have the same UUID, we assume they are
* the same object and the proxied object lives externally to the models
* we are differencing. We will skip the 'Metaclass.equals(Metaclass)' test
* because it would require us to load the model the proxy points to, which
* would be expensive.
*/
if (input.eIsProxy() || output.eIsProxy()) {
inputs.remove(input);
outputIter.remove();
addMapping(input, output, mapping, factory);
} else {
final EClass inputMetaclass = input.eClass();
final EClass outputMetaclass = output.eClass();
if (inputMetaclass.equals(outputMetaclass)) {
inputs.remove(input);
outputIter.remove();
addMapping(input, output, mapping, factory);
}
}
}
}
}
/*
* getObjectId returns the object id of an EObject whether it is a proxy
* or a real EObject.
*/
private ObjectID getObjectId( EObject eo ) {
ObjectID uuid = null;
if (eo == null) {
return uuid;
}
if (eo.eIsProxy()) {
if (eo instanceof EObjectImpl) {
URI uri = ((EObjectImpl)eo).eProxyURI();
String sUUIDFrag = uri.fragment();
uuid = getObjectIDFromString(sUUIDFrag);
}
} else {
uuid = ModelerCore.getObjectId(eo);
}
return uuid;
}
private ObjectID getObjectIDFromString( final String uuidString ) {
if (uuidString == null || uuidString.length() == 0) {
return null;
}
try {
return IDGenerator.getInstance().stringToObject(uuidString);
} catch (InvalidIDException e) {
// do nothing ...
}
return null;
}
}