r/org.eclipse.statet.r.debug.core/src/org/eclipse/statet/internal/r/debug/core/eval/ExpressionAdapterFactory.java

/*=============================================================================#
 # Copyright (c) 2016, 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.eval;

import org.eclipse.core.runtime.IAdapterFactory;
import org.eclipse.debug.core.model.IExpression;
import org.eclipse.debug.core.model.IValue;

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

import org.eclipse.statet.r.debug.core.IRValue;
import org.eclipse.statet.r.debug.core.IRVariable;


public class ExpressionAdapterFactory implements IAdapterFactory {
	
	
	private static final Class<?>[] ADAPTERS = new Class<?>[] {
		IRVariable.class,
	};
	
	
	public ExpressionAdapterFactory() {
	}
	
	
	@Override
	public Class<?>[] getAdapterList() {
		return ADAPTERS;
	}
	
	@Override
	public <T> @Nullable T getAdapter(final Object adaptableObject, final Class<T> adapterType) {
		if (adapterType == IRVariable.class) {
			final IValue value= ((IExpression) adaptableObject).getValue();
			if (value instanceof IRValue) {
				return (T) ((IRValue) value).getAssignedVariable();
			}
			return null;
		}
		return null;
	}
	
}