r/org.eclipse.statet.r.debug.core/src/org/eclipse/statet/internal/r/debug/core/model/RFunctionValue.java

/*=============================================================================#
 # Copyright (c) 2010, 2021 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.debug.core.model;

import org.eclipse.debug.core.DebugException;

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

import org.eclipse.statet.r.core.data.CombinedRElement;
import org.eclipse.statet.r.core.model.ArgsDefinition;
import org.eclipse.statet.r.core.model.ArgsDefinition.Arg;
import org.eclipse.statet.r.core.model.RLangMethod;


@NonNullByDefault
public class RFunctionValue extends RElementVariableValue<CombinedRElement> {
	
	
	public RFunctionValue(final RElementVariable variable) {
		super(variable);
	}
	
	
	@Override
	public String getValueString() throws DebugException {
		if (this.element instanceof RLangMethod) {
			final RLangMethod lang= (RLangMethod)this.element;
			final StringBuilder sb= new StringBuilder();
			final ArgsDefinition args= lang.getArgsDefinition();
			sb.append("function("); //$NON-NLS-1$
			if (args == null) {
				sb.append("<unknown>"); //$NON-NLS-1$
			}
			else if (args.size() > 0) {
				{	final Arg arg= args.get(0);
					if (arg.name != null) {
						sb.append(arg.name);
					}
				}
				{	for (int i= 1; i < args.size(); i++) {
						sb.append(", "); //$NON-NLS-1$
						final Arg arg= args.get(i);
						if (arg.name != null) {
							sb.append(arg.name);
						}
					}
				}
			}
			sb.append(")"); //$NON-NLS-1$
			return sb.toString();
		}
		return super.getValueString();
	}
	
}