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DefaultHierarchyNode.java
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DefaultHierarchyNode.java
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/**
* Copyright (c) 2016, 2020 TypeFox GmbH (http://www.typefox.io) and others.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.xtext.ide.editor.hierarchy;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import org.eclipse.emf.common.util.URI;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.util.Wrapper;
/**
* @author kosyakov - Initial contribution and API
* @since 2.10
*/
public class DefaultHierarchyNode implements IHierarchyNode {
private IHierarchyNode parent;
private boolean mayHaveChildren;
private IEObjectDescription element;
private final List<IHierarchyNodeReference> references = new ArrayList<>();
private Wrapper<Boolean> recursive;
@Override
public Object getNavigationElement() {
if (!references.isEmpty()) {
return references.get(0);
} else {
return element;
}
}
@Override
public boolean isRecursive() {
if (recursive == null) {
recursive = Wrapper.wrap(internalIsRecursive());
}
return recursive.get().booleanValue();
}
protected boolean internalIsRecursive() {
IHierarchyNode node = parent;
while (node != null) {
URI nodeElementUri = node.getElement().getEObjectURI();
URI elementUri = this.element.getEObjectURI();
if (Objects.equals(nodeElementUri, elementUri)) {
return true;
}
node = node.getParent();
}
return false;
}
@Override
public boolean mayHaveChildren() {
return mayHaveChildren;
}
public IHierarchyNode getParent() {
return parent;
}
public void setParent(IHierarchyNode parent) {
this.parent = parent;
}
public void setMayHaveChildren(boolean mayHaveChildren) {
this.mayHaveChildren = mayHaveChildren;
}
public IEObjectDescription getElement() {
return element;
}
public void setElement(IEObjectDescription element) {
this.element = element;
}
public List<IHierarchyNodeReference> getReferences() {
return references;
}
}