package org.simantics.db.layer0.adapter;

import org.simantics.db.ExternalValue;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.exception.DatabaseException;
import org.simantics.scl.reflection.ReflectionUtils;
import org.simantics.scl.reflection.ValueNotFoundException;

public class ReflectionExternalValue implements ExternalValue {

	@Override
	public <T> T getValue(ReadGraph graph, Resource resource) throws DatabaseException {
		
		try {
			return (T)ReflectionUtils.getValue(graph.getURI(resource)).getValue();
		} catch(ValueNotFoundException e) {
			throw new DatabaseException(e);
		} catch(ClassCastException e) {
			throw new DatabaseException(e);
		}
		
	}

}