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/*******************************************************************************
* Copyright (c) 2010-2015, Andras Szabolcs Nagy 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 org.eclipse.viatra.dse.statecoding;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.viatra.dse.api.DSEException;
import org.eclipse.viatra.dse.statecode.IStateCoder;
import org.eclipse.viatra.query.runtime.api.IPatternMatch;
public class TheStateCoder implements IStateCoder {
private StatecodingDependencyGraph sdg;
private IObjectsProvider objectProvider;
public TheStateCoder(StatecodingDependencyGraph sdg, IObjectsProvider objectProvider) {
this.sdg = sdg;
this.objectProvider = objectProvider;
}
@Override
public void init(Notifier notifier) {
// TODO checks
// TODO node sorting based on traversal - in factory
// this.notifier = notifier;
// try {
// EMFScope scope = new EMFScope(notifier);
// queryEngine = ViatraQueryEngine.on(scope);
// } catch (ViatraQueryException e1) {
// logger.error("Failed to initialize VIATRA Query engine on the given notifier", e1);
// throw new DSEException("Failed to initialize VIATRA Query engine on the given notifier");
// }
objectProvider.init(notifier, sdg);
}
@Override
public String createStateCode() {
StringBuilder sb = new StringBuilder();
// TODO sort
for (StatecodingNode node : sdg.getNodes()) {
sb.append(node.getClazz().getName());
sb.append(':');
sb.append(addStateCode(node));
sb.append('|');
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
}
@Override
public Object createActivationCode(IPatternMatch match) {
// TODO root object
// TODO parameterless?
int i = 0;
StringBuilder sb = new StringBuilder();
Object object;
do {
object = match.get(i++);
if (object != null) {
if (object instanceof EObject) {
EObject eObject = (EObject) object;
sb.append(addStateCode(sdg.getNodeByClass(eObject.eClass()), eObject));
} else {
// TODO toString or not to toString
}
}
} while (object != null);
return sb.toString();
}
public String addStateCode(StatecodingNode node, EObject eObject) {
StringBuilder sb = new StringBuilder();
Set<EAttribute> attributes = node.getAttributes();
if (!attributes.isEmpty()) {
for (EAttribute eAttribute : attributes) {
// attributes are sorted
// TODO handle collection
sb.append(eObject.eGet(eAttribute));
sb.append(';');
}
sb.deleteCharAt(sb.length() - 1);
}
List<StatecodingDependency> dependencies = node.getStatecodingDependencies();
int dependenciesSize = dependencies.size();
if (dependenciesSize > 0) {
String[] codeParts = new String[dependenciesSize];
int i = 0;
for (StatecodingDependency dependency : dependencies) {
String code = addStateCodeFromDependency(dependency, eObject);
codeParts[i++] = code;
}
Arrays.sort(codeParts);
sb.append("(");
sb.append(codeParts[0]);
for (i = 1; i < codeParts.length; i++) {
sb.append(';');
sb.append(codeParts[i]);
}
sb.append(")");
}
return sb.toString();
}
public String addStateCode(StatecodingNode node) {
Collection<EObject> eObjects = objectProvider.getEObjects(node.getClazz());
int size = eObjects.size();
if (size > 0) {
String[] codeParts = new String[size];
int i = 0;
for (EObject eObject : eObjects) {
String code = addStateCode(node, eObject);
codeParts[i++] = code;
}
Arrays.sort(codeParts);
StringBuilder sb = new StringBuilder();
sb.append(codeParts[0]);
for (i = 1; i < codeParts.length; i++) {
sb.append(';');
sb.append(codeParts[i]);
}
return sb.toString();
}
return "";
}
public String addStateCodeFromDependency(StatecodingDependency sd, EObject eObject) {
if (sd.type.equals(StatecodingDependencyType.NORMAL)) {
Object eReferred = eObject.eGet(sd.eReference);
if (eReferred == null) {
return "";
} else if (eReferred instanceof EList<?>) {
EList<?> refferedList = (EList<?>) eReferred;
// TODO test
if (!refferedList.isEmpty()) {
String[] codeParts = new String[refferedList.size()];
int i = 0;
for (Object referredEObject : refferedList) {
String code = addStateCode(sd.node, (EObject) referredEObject);
codeParts[i++] = code;
}
Arrays.sort(codeParts);
StringBuilder sb = new StringBuilder();
sb.append('[');
sb.append(codeParts[0]);
for (i = 1; i < codeParts.length; i++) {
sb.append(';');
sb.append(codeParts[i]);
}
sb.append(']');
return sb.toString();
}
} else if (eReferred instanceof EObject) {
return addStateCode(sd.node, (EObject) eReferred);
} else {
throw new DSEException("The EObject " + eObject.toString() + " does not have a feature "
+ eReferred.toString() + ".");
}
} else {
for (EObject dependentEObject : objectProvider.getEObjects(sd.node.getClazz())) {
Object eReferred = dependentEObject.eGet(sd.eReference);
if (eReferred == null) {
continue;
} else if (eReferred instanceof EList<?>) {
// TODO this is slow, use VIATRA Query
for (Object referredEObject : ((EList<?>) eReferred)) {
if (referredEObject.equals(eObject)) {
return addStateCode(sd.node, (EObject) dependentEObject);
}
}
} else if (eReferred.equals(eObject)) {
// Probably never happens?
return addStateCode(sd.node, (EObject) dependentEObject);
} else {
throw new DSEException("The EObject " + eObject.toString() + " does not have a feature "
+ eReferred.toString() + ".");
}
}
}
return "";
}
}
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