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

/*=============================================================================#
 # Copyright (c) 2009, 2019 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 java.util.Collections;
import java.util.List;

import org.eclipse.statet.jcommons.lang.Nullable;

import org.eclipse.statet.r.core.data.CombinedRElement;
import org.eclipse.statet.r.core.model.RElementName;
import org.eclipse.statet.rj.data.RStore;


public final class RNullVar extends BasicCombinedRElement {
	
	
	public RNullVar(final @Nullable BasicCombinedRElement parent, final @Nullable RElementName name) {
		super(parent, name);
	}
	
	
	@Override
	public byte getRObjectType() {
		return TYPE_NULL;
	}
	
	@Override
	public String getRClassName() {
		return CLASSNAME_NULL;
	}
	
	@Override
	public long getLength() {
		return 0;
	}
	
	@Override
	public @Nullable RStore<?> getData() {
		return null;
	}
	
	
	@Override
	public int getElementType() {
		return R_GENERAL_VARIABLE;
	}
	
	@Override
	public boolean hasModelChildren(final @Nullable Filter filter) {
		return false;
	}
	
	@Override
	public List<? extends CombinedRElement> getModelChildren(final @Nullable Filter filter) {
		return Collections.emptyList();
	}
	
	
	@Override
	public String toString() {
		return "RObject type=NULL";
	}
	
}