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IncomingTreeProvider.java
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IncomingTreeProvider.java
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/*******************************************************************************
* Copyright (c) 2022, 2023 Obeo.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.web.services.relatedelements;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.Objects;
import java.util.Optional;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature.Setting;
import org.eclipse.emf.ecore.util.ECrossReferenceAdapter;
import org.eclipse.emf.edit.provider.IItemLabelProvider;
import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
import org.eclipse.emf.edit.provider.IItemPropertySource;
import org.eclipse.emf.edit.provider.ItemProviderAdapter;
import org.eclipse.sirius.components.compatibility.emf.properties.api.IPropertiesValidationProvider;
import org.eclipse.sirius.components.compatibility.forms.WidgetIdProvider;
import org.eclipse.sirius.components.compatibility.services.ImageConstants;
import org.eclipse.sirius.components.core.api.IObjectService;
import org.eclipse.sirius.components.forms.TreeNode;
import org.eclipse.sirius.components.forms.components.TreeComponent;
import org.eclipse.sirius.components.forms.description.TreeDescription;
import org.eclipse.sirius.components.representations.VariableManager;
/**
* Provides the definition of the tree widget for the "Incoming" panel in the "Related Elements" view.
*
* @author pcdavid
*/
public class IncomingTreeProvider {
private static final String WIDGET_ID = "related/incoming";
private static final String TITLE = "Incoming";
private static final String WIDGET_ICON_URL = "/images/west_black_24dp.svg";
private static final String INCOMING_REFERENCE_ICON_URL = "/images/west_black_24dp.svg";
private static final String INCOMING_REFERENCES_KIND = "siriusWeb://category/incoming-references";
private final IObjectService objectService;
private final AdapterFactory adapterFactory;
private final IPropertiesValidationProvider propertiesValidationProvider = new IPropertiesValidationProvider.NoOp();
public IncomingTreeProvider(IObjectService objectService, AdapterFactory adapterFactory) {
this.objectService = Objects.requireNonNull(objectService);
this.adapterFactory = Objects.requireNonNull(adapterFactory);
}
public TreeDescription getTreeDescription() {
// @formatter:off
return TreeDescription.newTreeDescription(WIDGET_ID).idProvider(new WidgetIdProvider())
.diagnosticsProvider(this.propertiesValidationProvider.getDiagnosticsProvider())
.kindProvider(this.propertiesValidationProvider.getKindProvider())
.messageProvider(this.propertiesValidationProvider.getMessageProvider())
.labelProvider(variableManager -> TITLE)
.iconURLProvider(variableManager -> WIDGET_ICON_URL)
.nodeIdProvider(this::getNodeId)
.nodeLabelProvider(this::getNodeLabel)
.nodeImageURLProvider(this::getNodeImageURL)
.nodeKindProvider(this::getNodeKind)
.nodeSelectableProvider(this::isNodeSelectable)
.childrenProvider(this::getIncomingChildren)
.expandedNodeIdsProvider(this::collectAllNodeIds)
.build();
// @formatter:on
}
private List<?> getIncomingChildren(VariableManager variableManager) {
var self = variableManager.get(VariableManager.SELF, Object.class);
var root = variableManager.get(TreeComponent.ROOT_VARIABLE, EObject.class);
var ancestors = variableManager.get(TreeComponent.ANCESTORS_VARIABLE, List.class);
if (root.isPresent() && self.isPresent() && ancestors.isPresent()) {
return this.getIncomingChildren(self.get(), root.get(), ancestors.get());
} else {
return List.of();
}
}
private List<?> getIncomingChildren(Object self, EObject root, List<?> ancestors) {
List<?> result = List.of();
if (ancestors.isEmpty()) {
ECrossReferenceAdapter xref = ECrossReferenceAdapter.getCrossReferenceAdapter(root);
if (xref != null) {
// @formatter:off
var settings = xref.getInverseReferences(root).stream()
.sorted(Comparator.comparing(setting -> setting.getEStructuralFeature().getName()))
.toList();
Map<EReference, List<EObject>> sourceByReference = new LinkedHashMap<>();
for (Setting setting : settings) {
sourceByReference.computeIfAbsent((EReference) setting.getEStructuralFeature(), ref -> new ArrayList<>()).add(setting.getEObject());
}
// @formatter:on
result = sourceByReference.entrySet().stream().map(entry -> new IncomingReferences(entry.getKey(), entry.getValue())).toList();
}
} else if (self instanceof IncomingReferences) {
result = ((IncomingReferences) self).getSources();
}
return result;
}
private String getNodeId(VariableManager variableManager) {
String result = null;
var self = variableManager.get(VariableManager.SELF, Object.class).orElse(null);
if (self instanceof IncomingReferences) {
result = "reference/" + ((IncomingReferences) self).getReference().getName();
} else if (self != null) {
result = this.objectService.getId(self);
}
return result;
}
private String getNodeLabel(VariableManager variableManager) {
String result = null;
var self = variableManager.get(VariableManager.SELF, Object.class).orElse(null);
if (self instanceof IncomingReferences) {
EReference eReference = ((IncomingReferences) self).getReference();
EObject eObject = ((IncomingReferences) self).getSources().get(0);
result = eReference.getName();
if (eReference.isContainment()) {
result = "owned " + result;
Adapter adapter = this.adapterFactory.adapt(eObject, IItemLabelProvider.class);
if (adapter instanceof ItemProviderAdapter) {
ItemProviderAdapter editingDomainItemProvider = (ItemProviderAdapter) adapter;
String key = String.format("_UI_%s_%s_feature", eReference.getEContainingClass().getName(), eReference.getName());
try {
result = editingDomainItemProvider.getString(key);
} catch (MissingResourceException mre) {
// Expected for dynamic instances.
}
}
} else {
Adapter adapter = this.adapterFactory.adapt(eObject, IItemPropertySource.class);
if (adapter instanceof IItemPropertySource) {
IItemPropertySource itemPropertySource = (IItemPropertySource) adapter;
IItemPropertyDescriptor descriptor = itemPropertySource.getPropertyDescriptor(eObject, eReference);
if (descriptor != null) {
result = descriptor.getDisplayName(eReference);
} else {
result = eReference.getName();
}
}
}
} else if (self != null) {
result = this.objectService.getLabel(self);
}
return result;
}
private String getNodeImageURL(VariableManager variableManager) {
String result = null;
var self = variableManager.get(VariableManager.SELF, Object.class).orElse(null);
if (self instanceof IncomingReferences) {
result = INCOMING_REFERENCE_ICON_URL;
} else if (self != null) {
result = this.objectService.getImagePath(self);
}
return Optional.ofNullable(result).orElse(ImageConstants.DEFAULT_SVG);
}
private String getNodeKind(VariableManager variableManager) {
String result = null;
var self = variableManager.get(VariableManager.SELF, Object.class).orElse(null);
if (self instanceof IncomingReferences) {
result = INCOMING_REFERENCES_KIND;
} else if (self != null) {
result = this.objectService.getKind(self);
}
return result;
}
private boolean isNodeSelectable(VariableManager variableManager) {
return variableManager.get(VariableManager.SELF, EObject.class).isPresent();
}
private List<String> collectAllNodeIds(VariableManager variableManager) {
List<String> result = new ArrayList<>();
for (var element : variableManager.get(TreeComponent.NODES_VARIABLE, List.class).orElse(List.of())) {
if (element instanceof TreeNode) {
TreeNode node = (TreeNode) element;
result.add(node.getId());
}
}
return result;
}
}