r/org.eclipse.statet.r.console.core/src/org/eclipse/statet/internal/r/rdata/CombinedElement.java

/*=============================================================================#
 # Copyright (c) 2009, 2018 Stephan Wahlbrink 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
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.r.rdata;

import org.eclipse.jface.text.IRegion;

import org.eclipse.statet.ltk.model.core.elements.IModelElement;
import org.eclipse.statet.ltk.model.core.elements.ISourceUnit;
import org.eclipse.statet.r.core.data.ICombinedRElement;
import org.eclipse.statet.r.core.model.RElementName;
import org.eclipse.statet.r.core.model.RModel;
import org.eclipse.statet.rj.data.RList;
import org.eclipse.statet.rj.data.RObject;


public abstract class CombinedElement implements ICombinedRElement {
	
	
	private final CombinedElement fParent;
	private RElementName fElementName;
	
	
	protected CombinedElement(final CombinedElement parent, final RElementName name) {
		fParent = parent;
		fElementName = name;
	}
	
	
	@Override
	public RList getAttributes() {
		return null;
	}
	
	
	@Override
	public String getModelTypeId() {
		return RModel.R_TYPE_ID;
	}
	
	@Override
	public String getId() {
		return null; // not yet implemented
	}
	
	@Override
	public final RElementName getElementName() {
		return fElementName;
	}
	
	/** Internal **/
	public final void setElementName(final RElementName name) {
		fElementName = name;
	}
	
	@Override
	public boolean exists() {
		return true;
	}
	
	@Override
	public boolean isReadOnly() {
		return false;
	}
	
	@Override
	public final CombinedElement getModelParent() {
		return fParent;
	}
	
	@Override
	public ISourceUnit getSourceUnit() {
		return null;
	}
	
	@Override
	public IRegion getSourceRange() {
		return null;
	}
	
	@Override
	public IRegion getNameSourceRange() {
		return null;
	}
	
	@Override
	public IRegion getDocumentationRange() {
		return null;
	}
	
	
	@Override
	@SuppressWarnings("unchecked")
	public <T> T getAdapter(final Class<T> adapterType) {
		if (adapterType == IModelElement.class) {
			return (T) this;
		}
		if (adapterType == RObject.class) {
			return (T) this;
		}
		return null;
	}
	
	
	@Override
	public final int hashCode() {
		if (fParent != null) {
			return singleHash()-fParent.singleHash();
		}
		return singleHash();
	}
	
	protected int singleHash() {
		return getElementName().hashCode();
	}
	
	@Override
	public boolean equals(final Object obj) {
		if (obj == this) {
			return true;
		}
		if (!(obj instanceof CombinedElement)) {
			return false;
		}
		final ICombinedRElement other = (ICombinedRElement) obj;
		return (getElementName().equals(other.getElementName())
				&& ((fParent != null) ? fParent.equals(other.getModelParent()) : (other.getModelParent() == null)) );
	}
	
}