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/*******************************************************************************
* Copyright (c) 2017 Obeo.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.properties.core.api;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.stream.StreamSupport;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.sirius.common.interpreter.api.IInterpreter;
import org.eclipse.sirius.common.interpreter.api.IVariableManager;
import org.eclipse.sirius.properties.core.internal.converter.SiriusInitialOperationAdapter;
import org.eclipse.sirius.viewpoint.description.tool.InitialOperation;
/**
* {@link IDescriptionPreprocessor} implementation that supports ignoring some features and copying the value of some
* other features. This means that in the models resulting from the preprocessing, the ignored values are not copied or
* inherited. Features that must be copied are copied using {@link org.eclipse.emf.ecore.util.EcoreUtil#copy(EObject)}.
*
* @author flatombe
* @author mbats
*
* @param <SIRIUS>
* the type of description supported by this preprocessor.
*/
public class DefaultDescriptionPreprocessorWithFiltering<SIRIUS extends EObject> extends DefaultDescriptionPreprocessor<SIRIUS> {
/**
* The features to ignore.
*/
private Collection<EStructuralFeature> featuresToFilter = new ArrayList<EStructuralFeature>();
/**
* The features to copy.
*/
private Collection<EStructuralFeature> featuresToCopy = new ArrayList<EStructuralFeature>();
/**
* The constructor.
*
* @param descriptionClass
* the SIRIUS class
* @param featuresToFilter
* the collection of features of {@code descriptionClass} that must be ignored during the preprocessing.
* @param featuresToCopy
* the collection of features of {@code descriptionClass} that must be copied during the preprocessing
*/
public DefaultDescriptionPreprocessorWithFiltering(Class<SIRIUS> descriptionClass, Collection<EStructuralFeature> featuresToFilter, Collection<EStructuralFeature> featuresToCopy) {
super(descriptionClass);
this.featuresToCopy.addAll(featuresToCopy);
this.featuresToFilter.addAll(featuresToFilter);
}
/**
* Processes the given feature if it is not to be ignored. If the feature is to be copied, then re-directs to the
* methods that do the copying.
*
* @param feature
* the {@link EStructuralFeature} to process
* @param processedDescription
* the resulting description
* @param currentDescription
* the original description or one of its ancestors, from which properties are inherited
* @param cache
* the processing cache
* @param interpreter
* the interpreter
* @param variableManager
* the variable manager
* @param overridesProvider
* Utility class used to provide the override descriptions
*/
@Override
protected void processDescriptionFeature(EStructuralFeature feature, SIRIUS processedDescription, SIRIUS currentDescription, TransformationCache cache, IInterpreter interpreter,
IVariableManager variableManager, OverridesProvider overridesProvider) {
if (!featuresToFilter.contains(feature)) {
if (featuresToCopy.contains(feature)) {
if (!feature.isMany()) {
processMonoValuedFeatureByCopying(feature, processedDescription, currentDescription, cache);
} else {
processManyValuedFeatureByCopying(feature, processedDescription, currentDescription, cache, interpreter, variableManager, overridesProvider);
}
} else {
super.processDescriptionFeature(feature, processedDescription, currentDescription, cache, interpreter, variableManager, overridesProvider);
}
}
}
/**
* Processes the given {@link EStructuralFeature} by copying the value of the current description.
*
* @param monoValuedfeature
* the mono-valued feature being processed.
* @param processedDescription
* the resulting description.
* @param currentDescription
* the original or an ancestor description.
*/
private void processMonoValuedFeatureByCopying(EStructuralFeature monoValuedfeature, SIRIUS processedDescription, SIRIUS currentDescription, TransformationCache cache) {
if (!processedDescription.eIsSet(monoValuedfeature)) {
Object existingValue = currentDescription.eGet(monoValuedfeature);
if (existingValue instanceof EObject) {
EObject newValue = EcoreUtil.copy((EObject) existingValue);
cache.put(existingValue, newValue);
processedDescription.eSet(monoValuedfeature, newValue);
if (existingValue instanceof InitialOperation) {
newValue.eAdapters().add(new SiriusInitialOperationAdapter(EcoreUtil.getURI((InitialOperation) existingValue)));
}
}
}
}
/**
* Processes the given {@link EStructuralFeature} by adding to the processed description's feature value a copy of
* the values held by the current description.
*
* @param manyValuedFeature
* the many-valued feature being processed.
* @param processedDescription
* the resulting description.
* @param currentDescription
* the original or an ancestor description.
* @param cache
* the cache
* @param interpreter
* The interpreter
* @param variableManager
* The variable manager
* @param overridesProvider
* Utility class used to provide the override descriptions
*/
protected void processManyValuedFeatureByCopying(EStructuralFeature manyValuedFeature, SIRIUS processedDescription, SIRIUS currentDescription, TransformationCache cache, IInterpreter interpreter,
IVariableManager variableManager, OverridesProvider overridesProvider) {
Object processedValue = processedDescription.eGet(manyValuedFeature);
Object currentValue = currentDescription.eGet(manyValuedFeature);
if (currentValue instanceof Iterable<?> && processedValue instanceof Iterable<?>) {
List<Object> newValue = new ArrayList<>();
Iterable<?> currentIterable = (Iterable<?>) currentValue;
Iterable<?> processedIterable = (Iterable<?>) processedValue;
// For each current description create a copy and set it in the new
// values
StreamSupport.stream(currentIterable.spliterator(), false).filter(EObject.class::isInstance).map(EObject.class::cast).forEach(object -> {
if (!this.isFiltered(manyValuedFeature, processedDescription, object, cache, interpreter, variableManager, overridesProvider)) {
EObject newEObject = EcoreUtil.copy(object);
cache.put(object, newEObject);
newValue.add(newEObject);
if (object instanceof InitialOperation) {
newEObject.eAdapters().add(new SiriusInitialOperationAdapter(EcoreUtil.getURI(object)));
}
}
});
// Get all the already processed values
processedIterable.forEach(newValue::add);
// Set the new reference values
processedDescription.eSet(manyValuedFeature, newValue);
}
}
}
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